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Dwelling in a variety of aquatic habitats, one of the most abundant groups of microcrustaceans, ostracodes, are widely used indicator organisms in paleolimnological research. Typically, they are identified via traditional methods using morphological features but this may be excessively time-consuming and prone to inter-investigator variation. DNA barcoding and metabarcoding have become important tools for specimen identification, with a great impact in the field of taxonomy, (paleo-)ecology and evolution. Despite its potential, metabarcoding has been rarely used to analyze the community structure of ostracodes. Here, we evaluate the performance of a metabarcoding approach for ostracode identification in surface sediment samples collected from Lake Nam Co on the Tibetan Plateau. We tested six different primer pairs amplifying fragments of three different genes, and compared their success in inferring ostracode communities, coupled with morphological identification of ostracodes from the same sediment samples. In total, depending on the primer pair used, seven to nineteen ostracode amplicon sequence variants (ASVs) were identified. Via microscopy, eight morphospecies were identified. We found considerable differences between primer pairs in yielding ostracode sequences via metabarcoding. In general, the highest proportions of ostracode reads and ASVs were found with primers amplifying fragments of the 18S rRNA gene, whereas primers for COI gene had the highest in silico amplification success and highest sequencing depth per sample but only contained <1% of ostracode sequences. As a consequence, the metabarcoding results with 18S rRNA gene were more consistent with the morphological data compared to those obtained with COI or mitochondrial 16S rRNA primers. No significant effects of treatment with different sediment quantities for DNA extraction (10 g vs. 0.5 g) were found on ostracode ASVs community composition. These results indicate that DNA metabarcoding can serve as an efficient tool for ostracode-based environmental reconstructions but requires an informed decision on primers and target gene, as well as extending the barcoding database for improved accuracy.
Paula Echeverría‐Galindo; Sten Anslan; Peter Frenzel; Sven Künzel; Miguel Vences; Liseth Pérez; Nicole Börner; Wengang Kang; Anja Schwarz; Junbo Wang; Ping Peng; Liping Zhu; Antje Schwalb. High‐throughput identification of non‐marine Ostracoda from the Tibetan Plateau: Evaluating the success of various primers on sedimentary DNA samples. Environmental DNA 2021, 1 .
AMA StylePaula Echeverría‐Galindo, Sten Anslan, Peter Frenzel, Sven Künzel, Miguel Vences, Liseth Pérez, Nicole Börner, Wengang Kang, Anja Schwarz, Junbo Wang, Ping Peng, Liping Zhu, Antje Schwalb. High‐throughput identification of non‐marine Ostracoda from the Tibetan Plateau: Evaluating the success of various primers on sedimentary DNA samples. Environmental DNA. 2021; ():1.
Chicago/Turabian StylePaula Echeverría‐Galindo; Sten Anslan; Peter Frenzel; Sven Künzel; Miguel Vences; Liseth Pérez; Nicole Börner; Wengang Kang; Anja Schwarz; Junbo Wang; Ping Peng; Liping Zhu; Antje Schwalb. 2021. "High‐throughput identification of non‐marine Ostracoda from the Tibetan Plateau: Evaluating the success of various primers on sedimentary DNA samples." Environmental DNA , no. : 1.
For decades, paleoecological studies in lake sediments have focused on reconstructing the environments of the past and explaining phenomena linked to climatic variations. Recent advances in high-throughput DNA sequencing have allowed access to environmental DNA (eDNA) and ancient sedimentary DNA (sedaDNA) as a new and efficient proxy for past and present biodiversity. The basin of Mexico (BM) is located in the central part of the Trans-Mexican Volcanic Belt at 2,200 m a.s.l.; with the southern portion harboring the Chalco sub-basin. Lake Chalco is one of the last remaining natural aquatic ecosystems within the ever-expanding urban area surrounding Mexico City. The paleoenvironmental history of this lake has been previously characterized using sedimentological and geochemical proxies, as well as preserved microfossils (diatoms, pollen) with a temporal framework based on multiple radiocarbon dates. However, information for the remaining taxonomic groups and metabolic pathways remained unexplored. Here, we present the first metagenomics-based study for the Holocene in a high-altitude lake in Central Mexico –Lake Chalco. We explored the relationship between the lake’s paleoenvironmental condition and estimations of taxonomic and metabolic profiles across the sedimentary sequence (2.5 meters long). Multiple biological and abiotic variables revealed three main environmental phases: 1) a cool freshwater lake (FW1: 11,500-11,000 cal years BP), 2) a warm hyposaline lake (HS2: 11,000-6,000 cal years BP), and 3) a temperate, subsaline lake (SS3, <6,000 cal years BP). We describe the structure of the microbiota community and taxonomy richness turnover in the three Holocene paleoenvironmental phases. During the past 12 000 years BP the most abundant domains in Lake Chalco sediments were Bacteria, followed by Archaea, and Eukarya (36,722 genera). The analysis of functional proteins showed high biodiversity with a total of 27,636,243 proteins identified, but it was only possible to annotate 3,227,398 of them. Also, we identified several genes associated with some relevant pathways, such as methanogenesis. Altogether, this study allowed us to reconstruct the natural history of lake Chalco and its surroundings.
Bárbara Moguel; Liseth Pérez; Luis David Alcaraz; Socorro Lozano-García; Luis Herrera-Estrella; Jazmín Blaz; Margarita Caballero; María Ávila-Arcos; Juan Pedro Laclette; Israel Muñoz-Velasco; Beatriz Ortega-Guerrero; Arturo Becerra; Claudia Romero-Oliva. Past and recent biodiversity profiling in ancient Lake Chalco Mexico by a metagenomics analysis. 2021, 1 .
AMA StyleBárbara Moguel, Liseth Pérez, Luis David Alcaraz, Socorro Lozano-García, Luis Herrera-Estrella, Jazmín Blaz, Margarita Caballero, María Ávila-Arcos, Juan Pedro Laclette, Israel Muñoz-Velasco, Beatriz Ortega-Guerrero, Arturo Becerra, Claudia Romero-Oliva. Past and recent biodiversity profiling in ancient Lake Chalco Mexico by a metagenomics analysis. . 2021; ():1.
Chicago/Turabian StyleBárbara Moguel; Liseth Pérez; Luis David Alcaraz; Socorro Lozano-García; Luis Herrera-Estrella; Jazmín Blaz; Margarita Caballero; María Ávila-Arcos; Juan Pedro Laclette; Israel Muñoz-Velasco; Beatriz Ortega-Guerrero; Arturo Becerra; Claudia Romero-Oliva. 2021. "Past and recent biodiversity profiling in ancient Lake Chalco Mexico by a metagenomics analysis." , no. : 1.
The last 85,000 years were characterized by high climate and environmental variability on the Yucatán Peninsula. Heinrich stadials are examples of abrupt climate transitions that involved shifts in regional temperatures and moisture availability. Thus, they serve as natural experiments to evaluate the contrasting responses of aquatic and terrestrial ecosystems. We used ostracodes and pollen preserved in a 75.9-m-long sediment core (PI-6, ~85 ka) recovered from Lake Petén Itzá, Guatemala, to assess the magnitude and velocity of community responses. Ostracodes are sensitive to changes in water temperature and conductivity. Vegetation responds to shifts in temperature and the ratio of evaporation to precipitation. Ostracodes display larger and more rapid community changes than does vegetation. Heinrich Stadial 5-1 (HS5-1) was cold and dry and is associated with lower ostracode and vegetation species richness and diversity. In contrast, the slightly warmer and dry conditions during HS6 and HS5a are reflected in higher ostracode species richness and diversity. Our paleoecological study revealed the greatest ecological turnover for ostracodes occurred from 62.5 to 51.0 ka; for pollen, it was at the Pleistocene/Holocene transition. Future studies should use various climate and environmental indicators from lake and marine sediment records to further explore late glacial paleoclimate causes and effects in the northern neotropics.
Liseth Pérez; Alex Correa-Metrio; Sergio Cohuo; Laura Macario González; Paula Echeverría-Galindo; Mark Brenner; Jason Curtis; Steffen Kutterolf; Mona Stockhecke; Frederik Schenk; Thorsten Bauersachs; Antje Schwalb. Ecological turnover in neotropical freshwater and terrestrial communities during episodes of abrupt climate change. Quaternary Research 2021, 101, 26 -36.
AMA StyleLiseth Pérez, Alex Correa-Metrio, Sergio Cohuo, Laura Macario González, Paula Echeverría-Galindo, Mark Brenner, Jason Curtis, Steffen Kutterolf, Mona Stockhecke, Frederik Schenk, Thorsten Bauersachs, Antje Schwalb. Ecological turnover in neotropical freshwater and terrestrial communities during episodes of abrupt climate change. Quaternary Research. 2021; 101 ():26-36.
Chicago/Turabian StyleLiseth Pérez; Alex Correa-Metrio; Sergio Cohuo; Laura Macario González; Paula Echeverría-Galindo; Mark Brenner; Jason Curtis; Steffen Kutterolf; Mona Stockhecke; Frederik Schenk; Thorsten Bauersachs; Antje Schwalb. 2021. "Ecological turnover in neotropical freshwater and terrestrial communities during episodes of abrupt climate change." Quaternary Research 101, no. : 26-36.
High altitudinal aquatic ecosystems are subject to environmental change due to global warming and increasing solar radiation. The Nam Co catchment is part of the highest and largest alpine plateau on Earth, where the effects of climate change are expressed stronger than the global average. Thus, this area has experienced rapid changes in biodiversity. Fluctuations between wetter and drier periods during the last 2,000 calibrated (cal.) years were detected. These changes may alter the dynamics in ecosystems and therefore their resilience to climate change.
A ~65 cm sediment record from Nam Co spanning the late Holocene, was analyzed to evaluate the assemblage composition of three of the most abundant and diverse benthic taxa (Arcellinidae, Ostracoda and Chironomidae) and the diverse family of small bivalves (Sphaeriidae). In general, the presence of the bivalve Pisidium stewarti, together with a high abundance of black-coated ostracod shells, and high Ca/Ti and Zr/Rb ratios correspond to the driest period (~ 1,000 - 1,860 cal. years BP) detected in our sediment record. For the last 256 cal. years, higher lake levels were inferred from aquatic fauna composition and geochemical analysis (XRF and XRD) suggesting a more humid environment. This period was characterized by higher temperatures and a higher input of organic matter. Species not previously reported for Lake Nam Co such as Arcellinida species, the ostracod Ilyocypris angulata, several chironomid species, and the bivalve P. stewarti, were observed. These new records, as well as the detection of varieties in morphological structures (e.g. spines, aggregate material, valve ornamentations, etc.) highlight the probable existence of cryptic species in the ecosystem, which is an important factor to take into account for biodiversity evaluation and paleoenvironmental inferences, due to potential misleading ecological interpretation.
Therefore, emphasis should be placed on combining ecology, morphology and DNA analysis to corroborate the taxonomy of species already described, and determine the accurate richness and distribution of the species in an environment where endemism is expected. This is essential in order to evaluate possible losses or gains in terms of diversity that climate change may exert on aquatic ecosystems in the future.
Paula Galindo; Peter Frenzel; Sten Anslan; Sonja Rigterink; Julieta Massaferro; Wengang Kang; Bernd Wuennemann; Liseth Pérez; Philipp Hoelzmann; Nicole Börner; Anja Schwarz; Ping Peng; Liping Zhu; Antje Schwalb. Ecological impacts caused by the alternance of wet/dry episodes occurred in the last 2,000 years in southern Tibetan Plateau: A paleoecological record from Lake Nam Co. 2021, 1 .
AMA StylePaula Galindo, Peter Frenzel, Sten Anslan, Sonja Rigterink, Julieta Massaferro, Wengang Kang, Bernd Wuennemann, Liseth Pérez, Philipp Hoelzmann, Nicole Börner, Anja Schwarz, Ping Peng, Liping Zhu, Antje Schwalb. Ecological impacts caused by the alternance of wet/dry episodes occurred in the last 2,000 years in southern Tibetan Plateau: A paleoecological record from Lake Nam Co. . 2021; ():1.
Chicago/Turabian StylePaula Galindo; Peter Frenzel; Sten Anslan; Sonja Rigterink; Julieta Massaferro; Wengang Kang; Bernd Wuennemann; Liseth Pérez; Philipp Hoelzmann; Nicole Börner; Anja Schwarz; Ping Peng; Liping Zhu; Antje Schwalb. 2021. "Ecological impacts caused by the alternance of wet/dry episodes occurred in the last 2,000 years in southern Tibetan Plateau: A paleoecological record from Lake Nam Co." , no. : 1.
The Yucatán Peninsula is a karstic region, rich in subterranean environments with a diverse crustacean stygobiont fauna. In order to gain insights into the biological evolution of the subterranean environments of this region, we evaluated the ostracode species composition of caves and cenotes in five independent sampling campaigns (2008, 2013, 2017–2019). Using morphometric analyses, we evaluated inter-population morphological variability; using molecular analysis based on mitochondrial COI and nuclear 18S rDNA, we evaluated genetic differentiation in selected species. The observed fauna is composed of 20 (epigean) species, presenting a lack of strict stygobionts. Morphometric analyses discriminated up to three morphotypes in each of the three most abundant species: Cytheridella ilosvayi, Alicenula sp. and Cypridopsis vidua. High intraspecific morphological variability was found either in shape or size. Phylogenetic analysis based on COI demonstrated the existence of three lineages on C. ilosvayi, with high support (>0.9). The 18S rDNA sequences were identical among individuals of different populations. A lack of congruence between the genetic markers precluded us from postulating speciation in subterranean environments. It is likely that Late Pleistocene—Early Holocene climate variation related to sea level and precipitation was forcing agent for epigean ostracode dominance in subterranean environments of the Peninsula.
Laura Macario-González; Sergio Cohuo; Dorottya Angyal; Liseth Pérez; Maite Mascaró. Subterranean Waters of Yucatán Peninsula, Mexico Reveal Epigean Species Dominance and Intraspecific Variability in Freshwater Ostracodes (Crustacea: Ostracoda). Diversity 2021, 13, 44 .
AMA StyleLaura Macario-González, Sergio Cohuo, Dorottya Angyal, Liseth Pérez, Maite Mascaró. Subterranean Waters of Yucatán Peninsula, Mexico Reveal Epigean Species Dominance and Intraspecific Variability in Freshwater Ostracodes (Crustacea: Ostracoda). Diversity. 2021; 13 (2):44.
Chicago/Turabian StyleLaura Macario-González; Sergio Cohuo; Dorottya Angyal; Liseth Pérez; Maite Mascaró. 2021. "Subterranean Waters of Yucatán Peninsula, Mexico Reveal Epigean Species Dominance and Intraspecific Variability in Freshwater Ostracodes (Crustacea: Ostracoda)." Diversity 13, no. 2: 44.
Three new needle-shaped Fragilaria species from freshwater lake Apastepeque in El Salvador (Fragilaria salvadoriana sp. nov., F. maarensis sp. nov.) and subsaline lake Nam Co on the Tibetan Plateau (F. huebeneri sp. nov.) are described and compared based on light and scanning electron microscopy observations and morphometric analyses. Fragilaria salvadoriana sp. nov. is characterized by narrowly linear-lanceolate, sometimes centrally constricted valves, subcapitate to rarely capitate apices, and a distinct, dented appearing central area. Striae are composed of 2−5 occluded areolae. It can be differentiated from similar needle-shaped species by the valve outline, relatively low striae density, and shark fin-shaped spines. Characteristic of F. maarensis sp. nov. are a very narrowly lanceolate valve outline and subcapitate apices. The apical pore field is composed of 2–3 rows of poroids and acute, irregularly oriented spines are present at the junction between valve face and mantle. This taxon is clearly different from other Fragilaria species, displaying a high length-to-width ratio and a low number of areolae per stria. The Tibetan species, F. huebeneri sp. nov., forms long ribbon-like colonies linked together by spatula-shaped spines. Valves have subcapitate apices, a spindle- to needle-shaped outline and an indistinct central area. Striae are alternate and composed of 3–5 areolae per stria. Teratological forms of F. huebeneri sp. nov. were commonly observed in the sediment trap samples. Fragilaria salvadoriana sp. nov. and F. maarensis sp. nov. were found in a warm, tropical crater lake characterized by low conductivity and dissolved oxygen content, medium alkaline pH, and magnesium-calcium-bicarbonate-rich waters. Fragilaria huebeneri sp. nov. was frequent in a large, high elevation lake with increased specific conductivity, alkaline pH and sodium-bicarbonate-rich waters. The new species are compared to morphologically similar species from the genus Fragilaria Lyngbye and ecological preferences are discussed.
Kim J. Krahn; Anja Schwarz; Carlos E. Wetzel; Sergio Cohuo-Durán; Gerhard Daut; Laura Macario-González; Liseth Pérez; Junbo Wang; Antje Schwalb. Three new needle-shaped Fragilaria species from Central America and the Tibetan Plateau. Phytotaxa 2021, 479, 1 -22.
AMA StyleKim J. Krahn, Anja Schwarz, Carlos E. Wetzel, Sergio Cohuo-Durán, Gerhard Daut, Laura Macario-González, Liseth Pérez, Junbo Wang, Antje Schwalb. Three new needle-shaped Fragilaria species from Central America and the Tibetan Plateau. Phytotaxa. 2021; 479 (1):1-22.
Chicago/Turabian StyleKim J. Krahn; Anja Schwarz; Carlos E. Wetzel; Sergio Cohuo-Durán; Gerhard Daut; Laura Macario-González; Liseth Pérez; Junbo Wang; Antje Schwalb. 2021. "Three new needle-shaped Fragilaria species from Central America and the Tibetan Plateau." Phytotaxa 479, no. 1: 1-22.
Water levels in Lakes Metzabok and Tzibaná, two large karst lakes in the Lacandon Forest of southern Mexico, declined dramatically within a two-week period in July 2019. Lake Metzabok (0.83 km2; zmax = 25 m) dried completely, whereas in Lake Tzibaná (1.24 km2; zmax = 70 m) it fell by ~30 m. Analysis of satellite images in Lake Metzabok suggested a combined reduction in surface area of ~0.86 km2 and water volume loss of ~11.7 million m3. The sudden loss of such a large volume of water had negative impacts on local Lacandon Maya inhabitants, and profound ecological and environmental effects, in that it caused biodiversity loss.
We combined limnological and paleolimnological analyses to evaluate the ecological effects of the sudden loss of water from Lakes Metzabok and Tzibaná. We collected and analyzed remnant waters, surface sediments and short sediment cores from what remained of the water bodies to evaluate whether evidence for such drainage events is preserved in lake sediments. In situ water-column measurements yielded values similar to those from the previous six years when the lakes were filled, suggesting that evaporation was not the process responsible for lake level lowering, but rather that the lakes drained through fractures in the underlying karst bedrock. We collected phytoplankton and zooplankton samples from the remnant waters and found abundant diatoms, green algae, testate amoebae, crustaceans (copepods, cladocerans, ostracodes), insects (chironomids, trichopterans), collembolans, rotifers, tardigrades and nematodes. Environmental conditions in such small remnant ponds are probably stressful and unstable, but because many fish, the main predators in these ecosystems, did not survive the desiccation event, the aquatic environment is ideal for survival or recolonization by many invertebrate groups. Understanding the dynamics of this modern scenario with low lake levels is key for making paleolimnological inferences that use these aquatic bioindicators. We also investigated the commencing transition from an aquatic to a terrestrial habitat in Lake Metzabok. Abundant spiders colonized cracks in the dry sediment. Small, deep holes in surface mud were probably created by aquatic organisms when water levels decreased rapidly. Some cracks held rain water and were inhabited by tadpoles of the Gulf Coast toad (Incilius valliceps). The first plants to colonize the exposed lake beds belonged to the families Poaceae (grasses), Amaranthaceae (amaranths/chenopods) and Fabaceae (legumes), among others.
The sediment record from Lakes Metzabok and Tzibaná as well as testimonies of local Lacandon Maya inhabitants suggest that similar lake level lowering events occurred in the past. The hydrology of karst lakes is complex and unpredictable because multiple geological and hydrological factors control the water balance. The cause of this recent lake level lowering event remains unknown, but may be revealed by interdisciplinary studies of the limnology, paleolimnology, structural geology, geophysics, hydrology, geochemistry, genomics and geodesy of lakes and rivers in the region, as well as traditional environmental knowledge of the Lacandon Maya.
Liseth Perez; Selva Lacandona science team. Ecological effects of sudden drainage of large karst lakes in the Lacandon Maya region, southern Mexico. 2020, 1 .
AMA StyleLiseth Perez, Selva Lacandona science team. Ecological effects of sudden drainage of large karst lakes in the Lacandon Maya region, southern Mexico. . 2020; ():1.
Chicago/Turabian StyleLiseth Perez; Selva Lacandona science team. 2020. "Ecological effects of sudden drainage of large karst lakes in the Lacandon Maya region, southern Mexico." , no. : 1.
Geoscientists are often highly mobile, making them attractive candidates for academic positions. Nevertheless, changing your country of residency can be very challenging, and such challenges are amplified if one has small children, and especially if both parents are active researchers. We are both geoscientists, with specialties in paleolimnology and geophysics, and have a 2-year-old son and 7-year-old daughter. We are originally from Guatemala and Germany, and our children were born in Mexico, where we worked for seven years before moving to Germany.
Culture shock is often expected to be severe when moving from Europe to a developing country, like Mexico or Guatemala. In our case, however, we experienced serious cultural shock when we moved from Latin America to Germany. It became apparent that conditions were harsh for couples that try to live equitably at home and at work, and attempt not to neglect either family life or science. We identified multiple challenges in our daily life, such as: (1) the well-known lack of sufficient childcare options in Germany, (2) cultural differences at work, such as family-“unfriendly” scheduling of important meetings, (3) a lack of flexibility with respect to financial support for families whose members participate in professional symposia or fieldwork, and (4) policies of granting institutions that sometimes, unintentionally, preclude family-friendly work in academic research.
Our personal experiences may help to elucidate why the gender disparity in science is larger in wealthy, central European countries such as Germany (28.0% female researchers, UNESCO 2018) than in many Latin American countries, such as Mexico (33.0%) and Guatemala (53.2%). By identifying key issues, we hope to improve the situation for parent researchers - both female and male. Changes will be required of universities in Germany and elsewhere in Europe that intend to improve the quality of research and teaching at their institutions by attracting young, talented, international scientists. We acknowledge that every case is different, but encourage universities that are building strong programs through internationalization of the faculty to consider the needs of families of incoming foreign researchers, and actively support dual-career professional couples.
Liseth Perez; Matthias Bücker. Moving from Latin America to Germany: Culture shock and challenges faced by a geoscientist family. 2020, 1 .
AMA StyleLiseth Perez, Matthias Bücker. Moving from Latin America to Germany: Culture shock and challenges faced by a geoscientist family. . 2020; ():1.
Chicago/Turabian StyleLiseth Perez; Matthias Bücker. 2020. "Moving from Latin America to Germany: Culture shock and challenges faced by a geoscientist family." , no. : 1.
We evaluated how ranges of four endemic and non-endemic aquatic ostracode species changed in response to long-term (glacial–interglacial cycles) and abrupt climate fluctuations during the last 155 kyr in the northern Neotropical region. We employed two complementary approaches, fossil records and species distribution models (SDMs). Fossil assemblages were obtained from sediment cores PI-1, PI-2, PI-6 and Petén-Itzá 22-VIII-99 from the Petén Itzá Scientific Drilling Project, Lake Petén Itzá, Guatemala. To obtain a spatially resolved pattern of (past) species distribution, a downscaling cascade is employed. SDMs were reconstructed for the last interglacial (∼120 ka), the last glacial maximum (∼22 ka) and the middle Holocene (∼6 ka). During glacial and interglacial cycles and marine isotope stages (MISs), modelled paleo-distributions and paleo-records show the nearly continuous presence of endemic and non-endemic species in the region, suggesting negligible effects of long-term climate variations on aquatic niche stability. During periods of abrupt ecological disruption such as Heinrich Stadial 1 (HS1), endemic species were resilient, remaining within their current areas of distribution. Non-endemic species, however, proved to be more sensitive. Modelled paleo-distributions suggest that the geographic range of non-endemic species changed, moving southward into Central America. Due to the uncertainties involved in the downscaling from the global numerical to the highly resolved regional geospatial statistical modelling, results can be seen as a benchmark for future studies using similar approaches. Given relatively moderate temperature decreases in Lake Petén Itzá waters (∼5 ∘C) and the persistence of some aquatic ecosystems even during periods of severe drying in HS1, our data suggest (1) the existence of micro-refugia and/or (2) continuous interaction between central metapopulations and surrounding populations, enabling aquatic taxa to survive climate fluctuations in the northern Neotropical region.
Sergio Cohuo; Laura Macario-González; Sebastian Wagner; Katrin Naumann; Paula Echeverría-Galindo; Liseth Perez; Jason Curtis; Mark Brenner; Antje Schwalb. Influence of late Quaternary climate on the biogeography of Neotropical aquatic species as reflected by non-marine ostracodes. Biogeosciences 2020, 17, 145 -161.
AMA StyleSergio Cohuo, Laura Macario-González, Sebastian Wagner, Katrin Naumann, Paula Echeverría-Galindo, Liseth Perez, Jason Curtis, Mark Brenner, Antje Schwalb. Influence of late Quaternary climate on the biogeography of Neotropical aquatic species as reflected by non-marine ostracodes. Biogeosciences. 2020; 17 (1):145-161.
Chicago/Turabian StyleSergio Cohuo; Laura Macario-González; Sebastian Wagner; Katrin Naumann; Paula Echeverría-Galindo; Liseth Perez; Jason Curtis; Mark Brenner; Antje Schwalb. 2020. "Influence of late Quaternary climate on the biogeography of Neotropical aquatic species as reflected by non-marine ostracodes." Biogeosciences 17, no. 1: 145-161.
The primary scientific objective of MexiDrill, the Basin of Mexico Drilling Program, is development of a continuous, high-resolution ∼400 kyr lacustrine record of tropical North American environmental change. The field location, in the densely populated, water-stressed Mexico City region gives this record particular societal relevance. A detailed paleoclimate reconstruction from central Mexico will enhance our understanding of long-term natural climate variability in the North American tropics and its relationship with changes at higher latitudes. The site lies at the northern margin of the Intertropical Convergence Zone (ITCZ), where modern precipitation amounts are influenced by sea surface temperatures in the Pacific and Atlantic basins. During the Last Glacial Maximum (LGM), more winter precipitation at the site is hypothesized to have been a consequence of a southward displacement of the mid-latitude westerlies. It thus represents a key spatial node for understanding large-scale hydrological variability of tropical and subtropical North America and is at an altitude (2240 m a.s.l.), typical of much of western North America. In addition, its sediments contain a rich record of pre-Holocene volcanic history; knowledge of the magnitude and frequency relationships of the area's explosive volcanic eruptions will improve capacity for risk assessment of future activity. Explosive eruption deposits will also be used to provide the backbone of a robust chronology necessary for full exploitation of the paleoclimate record. Here we report initial results from, and outreach activities of, the 2016 coring campaign.
Erik T. Brown; Margarita Caballero; Enrique Cabral Cano; Peter J. Fawcett; Socorro Lozano-García; Beatriz Ortega; Liseth Perez; Antje Schwalb; Victoria Smith; Byron A. Steinman; Mona Stockhecke; Blas Valero-Garcés; Sebastian Watt; Nigel J. Wattrus; Josef P. Werne; Thomas Wonik; Amy E. Myrbo; Anders J. Noren; Ryan O'grady; Douglas Schnurrenberger; the MexiDrill Team. Scientific drilling of Lake Chalco, Basin of Mexico (MexiDrill). Scientific Drilling 2019, 26, 1 -15.
AMA StyleErik T. Brown, Margarita Caballero, Enrique Cabral Cano, Peter J. Fawcett, Socorro Lozano-García, Beatriz Ortega, Liseth Perez, Antje Schwalb, Victoria Smith, Byron A. Steinman, Mona Stockhecke, Blas Valero-Garcés, Sebastian Watt, Nigel J. Wattrus, Josef P. Werne, Thomas Wonik, Amy E. Myrbo, Anders J. Noren, Ryan O'grady, Douglas Schnurrenberger, the MexiDrill Team. Scientific drilling of Lake Chalco, Basin of Mexico (MexiDrill). Scientific Drilling. 2019; 26 ():1-15.
Chicago/Turabian StyleErik T. Brown; Margarita Caballero; Enrique Cabral Cano; Peter J. Fawcett; Socorro Lozano-García; Beatriz Ortega; Liseth Perez; Antje Schwalb; Victoria Smith; Byron A. Steinman; Mona Stockhecke; Blas Valero-Garcés; Sebastian Watt; Nigel J. Wattrus; Josef P. Werne; Thomas Wonik; Amy E. Myrbo; Anders J. Noren; Ryan O'grady; Douglas Schnurrenberger; the MexiDrill Team. 2019. "Scientific drilling of Lake Chalco, Basin of Mexico (MexiDrill)." Scientific Drilling 26, no. : 1-15.
Ostracodes are bivalve microcrustaceans with calcium carbonate shells that preserve well in lake sediment. They are very sensitive to environmental variables and are therefore powerful tools in paleoclimate and paleoenvironmental studies that cover time periods from decades to millions of years. Detailed knowledge of species ecological preferences and robust taxonomy are prerequisites for such studies. Such information, however, is still lacking for many areas of the world, including the Neotropics. Previous studies in the northern Neotropics were conducted mainly in the karst lowlands of the Yucatán Peninsula, but higher-altitude areas remained relatively poorly investigated. This study was designed to expand our knowledge of the modern, Neotropical freshwater ostracode fauna, across an altitudinal gradient from the karst lakes in the lowlands of El Petén, Guatemala (~100 - 500 m asl), to the mid-elevation water bodies of the Lacandón forest (~500 - 1000 m asl), to the higher-altitude lakes of Montebello, Chiapas, México (~1000 - 1500 m asl). Eighteen ostracode species were identified in 24 lakes. Ostracodes were absent in Lakes Amarillo and Lacandón (mid-altitude), and San Diego (lowlands). Statistical analysis indicated that the most abundant species, Cypridopsis vidua, Cytheridella ilosvayi, Pseudocandona antillana, and Darwinula stevensoni have a continuous distribution along the entire altitudinal gradient. Other species display more restricted distributions, determined by temperature, precipitation and conductivity. For example, Eucypris sp. is restricted to the lowlands, Vestalenula sp. and Cypria sp. were found only at middle elevations, and a Cyprididae species was restricted to the highlands. Species diversity is slightly greater in warm lakes at middle altitudes (Haverage = 1.09) than in water bodies in the lowlands (Haverage = 0.94) and in cooler lakes in the highlands (Haverage = 0.94). LOESS regressions provided ecological preference information for the four most frequent and widely distributed species, with respect to temperature, conductivity, bicarbonate (HCO3-) concentration, precipitation, and pH. Cypria petenensis, Heterocypris punctata, and Paracythereis opesta display higher abundances in lowland lakes, whereas, Cytheridella ilosvayi, and Pseudocandona antillana prefer lowland and mid-elevation lakes. Environmental conditions in the higher-elevation lakes of Montebello favor the presence of Darwinula stevensoni. Such quantitative ecological information will improve ostracode-based paleoenvironmental reconstructions in southern México and northern Guatemala, and our approach serves as a model for future paleoecological studies that employ other aquatic bioindicators, such as testate amoebae, cladocerans, and chironomids.
Paula Gabriela Echeverría Galindo; Liseth Pérez; Alexander Correa-Metrio; Carlos Avendaño; Bárbara Moguel; Mark Brenner; Sergio Cohuo; Laura Macario; Antje Schwalb. Tropical freshwater ostracodes as environmental indicators across an altitude gradient in Guatemala and Mexico. Revista de Biología Tropical 2019, 67, 1 .
AMA StylePaula Gabriela Echeverría Galindo, Liseth Pérez, Alexander Correa-Metrio, Carlos Avendaño, Bárbara Moguel, Mark Brenner, Sergio Cohuo, Laura Macario, Antje Schwalb. Tropical freshwater ostracodes as environmental indicators across an altitude gradient in Guatemala and Mexico. Revista de Biología Tropical. 2019; 67 (4):1.
Chicago/Turabian StylePaula Gabriela Echeverría Galindo; Liseth Pérez; Alexander Correa-Metrio; Carlos Avendaño; Bárbara Moguel; Mark Brenner; Sergio Cohuo; Laura Macario; Antje Schwalb. 2019. "Tropical freshwater ostracodes as environmental indicators across an altitude gradient in Guatemala and Mexico." Revista de Biología Tropical 67, no. 4: 1.
We reconstruct environmental conditions of the period 53-14 kyr BP in the continental northern Neotropical region. We evaluate in detail the magnitude of climatic fluctuations and their effects on aquatic communities during six Heinrich Stadials (HS1-HS5a), using sediments from Lake Petén Itzá, Guatemala, and a multiproxy approach. In Lake Petén Itzá typical Heinrich Stadials (HSs) are recorded in sediments as alternations of gypsum and clay, and abrupt changes in magnetic susceptibility, CaCO3 and biological compositions. This suggests that HSs were periods of hydrological unbalance, characterized by dry spells, punctuating the predominant humid conditions characterizing the period 53-14 kyr BP. The ultrastructure of HSs allows us to identify four different types of climatic conditions associated to HSs: 1) prevailing dry conditions but changing to humid (HS5, HS3); 2) predominantly humid conditions but changing to arid (HS2); 3) fluctuating humid-dry-humid (HS4, HS1); and 4) arid with high lake water conductivity (HS5a). The continuous presence of tropical ostracode species during HSs suggests that lake water temperatures were not drastically lowered. Ostracode-based transfer functions indicate that during HSs, epilimnetic water temperatures decreased by 1–3 °C compared to mean modern temperatures. Lake solute composition and conductivity were strongly affected by HSs. During HS5a and HS1 we estimate conductivity values > 800 μS cm−1. Diversity indices show significant differences (F5,70 = 3.74, p = 0.004) of ostracode species composition among HSs. Highest diversities occurred during HS5a, HS4 and HS1, which display greater climatic alterations than the other HSs. Fluctuating climates seem to have exerted positive effects on diversity of aquatic communities by producing an increase in habitat heterogeneity.
Sergio Cohuo; Laura Macario-González; Liseth Pérez; Florence Sylvestre; Christine Paillès; Jason H. Curtis; Steffen Kutterolf; Marta Wojewódka; Edyta Zawisza; Krystyna Szeroczyńska; Antje Schwalb. Climate ultrastructure and aquatic community response to Heinrich Stadials (HS5a-HS1) in the continental northern Neotropics. Quaternary Science Reviews 2018, 197, 75 -91.
AMA StyleSergio Cohuo, Laura Macario-González, Liseth Pérez, Florence Sylvestre, Christine Paillès, Jason H. Curtis, Steffen Kutterolf, Marta Wojewódka, Edyta Zawisza, Krystyna Szeroczyńska, Antje Schwalb. Climate ultrastructure and aquatic community response to Heinrich Stadials (HS5a-HS1) in the continental northern Neotropics. Quaternary Science Reviews. 2018; 197 ():75-91.
Chicago/Turabian StyleSergio Cohuo; Laura Macario-González; Liseth Pérez; Florence Sylvestre; Christine Paillès; Jason H. Curtis; Steffen Kutterolf; Marta Wojewódka; Edyta Zawisza; Krystyna Szeroczyńska; Antje Schwalb. 2018. "Climate ultrastructure and aquatic community response to Heinrich Stadials (HS5a-HS1) in the continental northern Neotropics." Quaternary Science Reviews 197, no. : 75-91.
Cenotes (sinkholes), formed by the dissolution of the carbonate rock, are the most common waterbodies on the Yucatan Peninsula. Despite their unique features and great amount in the region, our knowledge on the biota of cenotes remains fragmentary. Within the present study we analysed chironomid remains from surface sediment of ten cenotes situated in SE Mexico. In total, 20 taxa of 17 genera were recorded, and the total diversity was estimated to ~30 taxa. The most common taxa were Polypedilum (Tripodura) sp., Tanytarsus ortoni-type, Fittkauimyia sp., Labrundinia sp. and Endotribelos sp. There was a great variability in head capsule abundance among cenotes, ranging from 1 to 64 individuals per site with significantly higher number of remains recorded in open cenotes compared to the closed, cavern types. The results indicate that beside ecological features, such as low trophy, oxygen depletion, simplified habitat structure and fish predation, there are also taphonomical processes connected to the specific nature of cenotes that can hinder the accumulation of biological remains in the sediment. We conclude that due to poor sedimentation and preservation of remains, cenotes have limited potential for palaeolimnological studies.
Ladislav Hamerlík; Marta Wojewodka; Edyta Zawisza; Sergio Cohuo Duran; Laura Macario-Gonzalez; Liseth Perez; Krystyna Szeroczynska. Subfossil Chironomidae (Diptera) in surface sediments of the sinkholes (cenotes) of the Yucatan Peninsula: Diversity and distribution. Journal of Limnology 2018, 1 .
AMA StyleLadislav Hamerlík, Marta Wojewodka, Edyta Zawisza, Sergio Cohuo Duran, Laura Macario-Gonzalez, Liseth Perez, Krystyna Szeroczynska. Subfossil Chironomidae (Diptera) in surface sediments of the sinkholes (cenotes) of the Yucatan Peninsula: Diversity and distribution. Journal of Limnology. 2018; ():1.
Chicago/Turabian StyleLadislav Hamerlík; Marta Wojewodka; Edyta Zawisza; Sergio Cohuo Duran; Laura Macario-Gonzalez; Liseth Perez; Krystyna Szeroczynska. 2018. "Subfossil Chironomidae (Diptera) in surface sediments of the sinkholes (cenotes) of the Yucatan Peninsula: Diversity and distribution." Journal of Limnology , no. : 1.
Laura Macario-González; Sergio Cohuo; Manuel Elías-Gutiérrez; Miguel Vences; Liseth Pérez; Antje Schwalb. Integrative taxonomy of freshwater ostracodes (Crustacea: Ostracoda) of the Yucatán Peninsula, implications for paleoenvironmental reconstructions in the northern Neotropical region. Zoologischer Anzeiger - A Journal of Comparative Zoology 2018, 275, 20 -36.
AMA StyleLaura Macario-González, Sergio Cohuo, Manuel Elías-Gutiérrez, Miguel Vences, Liseth Pérez, Antje Schwalb. Integrative taxonomy of freshwater ostracodes (Crustacea: Ostracoda) of the Yucatán Peninsula, implications for paleoenvironmental reconstructions in the northern Neotropical region. Zoologischer Anzeiger - A Journal of Comparative Zoology. 2018; 275 ():20-36.
Chicago/Turabian StyleLaura Macario-González; Sergio Cohuo; Manuel Elías-Gutiérrez; Miguel Vences; Liseth Pérez; Antje Schwalb. 2018. "Integrative taxonomy of freshwater ostracodes (Crustacea: Ostracoda) of the Yucatán Peninsula, implications for paleoenvironmental reconstructions in the northern Neotropical region." Zoologischer Anzeiger - A Journal of Comparative Zoology 275, no. : 20-36.
Felipe Franco-Gaviria; Dayenari Caballero-Rodríguez; Alexander Correa-Metrio; Liseth Pérez; Antje Schwalb; Sergio Cohuo; Laura Macario-González. The human impact imprint on modern pollen spectra of the Maya lands. Boletín de la Sociedad Geológica Mexicana 2018, 70, 61 -78.
AMA StyleFelipe Franco-Gaviria, Dayenari Caballero-Rodríguez, Alexander Correa-Metrio, Liseth Pérez, Antje Schwalb, Sergio Cohuo, Laura Macario-González. The human impact imprint on modern pollen spectra of the Maya lands. Boletín de la Sociedad Geológica Mexicana. 2018; 70 (1):61-78.
Chicago/Turabian StyleFelipe Franco-Gaviria; Dayenari Caballero-Rodríguez; Alexander Correa-Metrio; Liseth Pérez; Antje Schwalb; Sergio Cohuo; Laura Macario-González. 2018. "The human impact imprint on modern pollen spectra of the Maya lands." Boletín de la Sociedad Geológica Mexicana 70, no. 1: 61-78.
Amber inclusions of fully aquatic animals are rare, most of them isolated specimens of water-bound insect larvae. In contrast, we here describe an ample, speciose fauna of 262 fully aquatic individuals of Ostracoda (Crustacea) from Mexican amber of Early Miocene age. This fauna was trapped whilst under water swimming around trunks of resin-producing trees in a brackish lagoon. Ostracod crustaceans are typically around a millimeter in length, and are known for their mostly well-calcified bivalved carapaces that account for their unparalleled fossil record in arthropods. However, in the Chiapas amber we found representatives of the tribe Thalassocypridini, which are characterised by lightly calcified carapaces and therefore lack a substantial fossil record. Embedded in amber, this ‘drawback’ becomes a clear benefit because the unobstructed view onto the appendages otherwise hidden in the carapace allowed us to identify nine ostracod species, six of them new to science. The exceptional number of individuals permitted insights into population composition, reproduction, taphonomy and into micro-environmental parameters of the amber’s place of formation. Based on ecological data available for Recent Thalassocypridini species, we posit that this tribe reached a peak radiation in open lagoonal settings during the Miocene, and shifted towards anchialine environments by the Recent. http://zoobank.org/lsid:zoobank.org:pub:3C93A06B-F86B-404F-985D-139897F97EF3
Renate Matzke-Karasz; María De Lourdes Serrano-Sánchez; Liseth Perez; Dietmar Keyser; Radovan Pipík; Francisco J. Vega. Abundant assemblage of Ostracoda (Crustacea) in Mexican Miocene amber sheds light on the evolution of the brackish-water tribe Thalassocypridini. Historical Biology 2017, 31, 65 -101.
AMA StyleRenate Matzke-Karasz, María De Lourdes Serrano-Sánchez, Liseth Perez, Dietmar Keyser, Radovan Pipík, Francisco J. Vega. Abundant assemblage of Ostracoda (Crustacea) in Mexican Miocene amber sheds light on the evolution of the brackish-water tribe Thalassocypridini. Historical Biology. 2017; 31 (2):65-101.
Chicago/Turabian StyleRenate Matzke-Karasz; María De Lourdes Serrano-Sánchez; Liseth Perez; Dietmar Keyser; Radovan Pipík; Francisco J. Vega. 2017. "Abundant assemblage of Ostracoda (Crustacea) in Mexican Miocene amber sheds light on the evolution of the brackish-water tribe Thalassocypridini." Historical Biology 31, no. 2: 65-101.
This paleolimnological study used ostracodes assemblages, element concentrations, organic and inorganic carbon content, organic C:N ratios, and stable isotope values in valves of the ostracodes Cytheridella ilosvayi as paleoindicators and is the first such investigation from a mid-elevation site in southern México. We provide a ~7600-year (9540–1970 BP) environmental history from karst Lake Ocotalito (920 m a.s.l.), which lies in the Lacandon Forest of Chiapas, México. A 5.4-m sediment core was retrieved from a water depth of 23 m. The main factor that shaped ostracodes species assemblages throughout the Holocene was lake level. A total of six species were identified, and the benthic Cytheridella ilosvayi was dominant. Less abundant species included nektobenthic taxa Cypridopsis okeechobei, Heterocypris putei, and Potamocypris sp. and benthic species Darwinula stevensoni and Pseudocandona sp. Wet conditions, high lake levels (>15 m), and low ostracodes abundances characterized the period between ~9540 and ~7820 BP. From ~7750 to 6460 BP, indicators point to stable conditions and intermediate lake levels (~15 m). Greatest ostracodes abundance and diversity occurred from ~6200 to ~4030 BP, during which mainly drier conditions were inferred, interrupted by short, humid periods. Lower abundances and low Sr and δ18O values characterized the period from ~3810 to ~1970 BP and indicate higher lake levels, that is, wetter conditions. Throughout this period, however, a slight trend toward drier conditions was observed. Comparison with paleolimnological studies in other karst lakes from the region suggests mid-altitude aquatic ecosystems may be more sensitive to climate fluctuations than lakes in the lowlands. For instance, stable isotope records from the Lake Ocotalito core display greater ranges. This, however, may simply reflect inter-lake differences in sensitivity, controlled by lake-specific hydrologic factors. The record from Lake Ocotalito fills an important gap in our knowledge of past biotic diversity, paleoclimate, and paleoenvironmental conditions in the northern Neotropics.
Karen A Díaz; Liseth Pérez; Alexander Correa-Metrio; Juan Felipe Franco-Gaviria; Paula Echeverría; Jason Curtis; Mark Brenner. Holocene environmental history of tropical, mid-altitude Lake Ocotalito, México, inferred from ostracodes and non-biological indicators. The Holocene 2017, 27, 1308 -1317.
AMA StyleKaren A Díaz, Liseth Pérez, Alexander Correa-Metrio, Juan Felipe Franco-Gaviria, Paula Echeverría, Jason Curtis, Mark Brenner. Holocene environmental history of tropical, mid-altitude Lake Ocotalito, México, inferred from ostracodes and non-biological indicators. The Holocene. 2017; 27 (9):1308-1317.
Chicago/Turabian StyleKaren A Díaz; Liseth Pérez; Alexander Correa-Metrio; Juan Felipe Franco-Gaviria; Paula Echeverría; Jason Curtis; Mark Brenner. 2017. "Holocene environmental history of tropical, mid-altitude Lake Ocotalito, México, inferred from ostracodes and non-biological indicators." The Holocene 27, no. 9: 1308-1317.
Socorro Lozano-García; Erik T. Brown; Beatriz Ortega; Margarita Caballero; Josef Werne; Peter J. Fawcett; Antje Schwalb; Blas L. Valero-Garcés; Douglas Schnurrenberger; Ryan O´grady; Mona Stockhecke; Byron Steinman; Enrique Cabral-Cano; Susana Sosa-Nájera; Ana María Soler; Liseth Pérez; Anders Noren; Amy Myrbo; Matthias Bücker; Bücker Wattrus; Alejandra Arciniega; Thomas Wonik; Sebastian Watt; Dervla Kumar; Carmen Acosta; Rafael Cossio; Troy Ferland; Filiberto Vergara-Huerta; Cecilia Caballero; Ivan Martínez. Perforación profunda en el lago de Chalco: reporte técnico. Boletín de la Sociedad Geológica Mexicana 2017, 69, 299 -311.
AMA StyleSocorro Lozano-García, Erik T. Brown, Beatriz Ortega, Margarita Caballero, Josef Werne, Peter J. Fawcett, Antje Schwalb, Blas L. Valero-Garcés, Douglas Schnurrenberger, Ryan O´grady, Mona Stockhecke, Byron Steinman, Enrique Cabral-Cano, Susana Sosa-Nájera, Ana María Soler, Liseth Pérez, Anders Noren, Amy Myrbo, Matthias Bücker, Bücker Wattrus, Alejandra Arciniega, Thomas Wonik, Sebastian Watt, Dervla Kumar, Carmen Acosta, Rafael Cossio, Troy Ferland, Filiberto Vergara-Huerta, Cecilia Caballero, Ivan Martínez. Perforación profunda en el lago de Chalco: reporte técnico. Boletín de la Sociedad Geológica Mexicana. 2017; 69 (2):299-311.
Chicago/Turabian StyleSocorro Lozano-García; Erik T. Brown; Beatriz Ortega; Margarita Caballero; Josef Werne; Peter J. Fawcett; Antje Schwalb; Blas L. Valero-Garcés; Douglas Schnurrenberger; Ryan O´grady; Mona Stockhecke; Byron Steinman; Enrique Cabral-Cano; Susana Sosa-Nájera; Ana María Soler; Liseth Pérez; Anders Noren; Amy Myrbo; Matthias Bücker; Bücker Wattrus; Alejandra Arciniega; Thomas Wonik; Sebastian Watt; Dervla Kumar; Carmen Acosta; Rafael Cossio; Troy Ferland; Filiberto Vergara-Huerta; Cecilia Caballero; Ivan Martínez. 2017. "Perforación profunda en el lago de Chalco: reporte técnico." Boletín de la Sociedad Geológica Mexicana 69, no. 2: 299-311.
Itzel Sigala; Margarita Caballero; Alexander Correa-Metrio; Socorro Lozano-García; Gabriela Vazquez; Liseth Perez; Edyta Zawisza. Basic limnology of 30 continental waterbodies of the Transmexican Volcanic Belt across climatic and environmental gradients. Boletín de la Sociedad Geológica Mexicana 2017, 69, 313 -370.
AMA StyleItzel Sigala, Margarita Caballero, Alexander Correa-Metrio, Socorro Lozano-García, Gabriela Vazquez, Liseth Perez, Edyta Zawisza. Basic limnology of 30 continental waterbodies of the Transmexican Volcanic Belt across climatic and environmental gradients. Boletín de la Sociedad Geológica Mexicana. 2017; 69 (2):313-370.
Chicago/Turabian StyleItzel Sigala; Margarita Caballero; Alexander Correa-Metrio; Socorro Lozano-García; Gabriela Vazquez; Liseth Perez; Edyta Zawisza. 2017. "Basic limnology of 30 continental waterbodies of the Transmexican Volcanic Belt across climatic and environmental gradients." Boletín de la Sociedad Geológica Mexicana 69, no. 2: 313-370.
Matthias Bücker; Socorro Lozano García; Beatriz Ortega Guerrero; Margarita Caballero; Liseth Pérez; Lizeth Caballero; Carlos Pita De La Paz; Alfredo Sánchez-Galindo; Francisco Jesús Villegas; Josef Werne; Blas Valero Garcés; Antje Schwalb; Andreas Kemna; Edgar Sánchez-Alvaro; Norberto Launizar-Martínez; Antonio Valverde-Placencia; Fernando Garay-Jiménez; Adrián Flores Orozco; Erik Brown. " Geoelectrical and Electromagnetic Methods Applied to Paleolimnological Studies: Two Examples from Desiccated Lakes in the Basin of Mexico". Boletín de la Sociedad Geológica Mexicana 2017, 69, 279 -298.
AMA StyleMatthias Bücker, Socorro Lozano García, Beatriz Ortega Guerrero, Margarita Caballero, Liseth Pérez, Lizeth Caballero, Carlos Pita De La Paz, Alfredo Sánchez-Galindo, Francisco Jesús Villegas, Josef Werne, Blas Valero Garcés, Antje Schwalb, Andreas Kemna, Edgar Sánchez-Alvaro, Norberto Launizar-Martínez, Antonio Valverde-Placencia, Fernando Garay-Jiménez, Adrián Flores Orozco, Erik Brown. " Geoelectrical and Electromagnetic Methods Applied to Paleolimnological Studies: Two Examples from Desiccated Lakes in the Basin of Mexico". Boletín de la Sociedad Geológica Mexicana. 2017; 69 (2):279-298.
Chicago/Turabian StyleMatthias Bücker; Socorro Lozano García; Beatriz Ortega Guerrero; Margarita Caballero; Liseth Pérez; Lizeth Caballero; Carlos Pita De La Paz; Alfredo Sánchez-Galindo; Francisco Jesús Villegas; Josef Werne; Blas Valero Garcés; Antje Schwalb; Andreas Kemna; Edgar Sánchez-Alvaro; Norberto Launizar-Martínez; Antonio Valverde-Placencia; Fernando Garay-Jiménez; Adrián Flores Orozco; Erik Brown. 2017. "" Geoelectrical and Electromagnetic Methods Applied to Paleolimnological Studies: Two Examples from Desiccated Lakes in the Basin of Mexico"." Boletín de la Sociedad Geológica Mexicana 69, no. 2: 279-298.