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El piso forestal o mantillo es el almacén de carbono que regula la mayoría de los procesos funcionales de los ecosistemas forestales, influyendo directamente en la fertilidad del suelo y en la productividad del sitio. El contenido de carbono en el piso forestal es altamente variable en espacio y tiempo; por ello, obtener evaluaciones precisas del carbono contenido en este almacén representa un desafío metodológico importante a cualquier escala. En este estudio, se compararon cuatro métodos de modelación espacial para mapear el contenido de carbono en el piso forestal de un bosque templado. Los métodos fueron kriging ordinario, modelo lineal generalizado, modelo aditivo generalizado y random forest. Las estimaciones del contenido de carbono fueron realizadas para 2013 y 2018. Las variables predictoras representan la estructura espacial, del dosel y topográfica presente en el área de estudio. Todos los modelos fueron evaluados mediante validación cruzada y se determinó el error medio absoluto, el error cuadrático medio y el coeficiente de determinación. El desempeño de los métodos fue, en orden decreciente: random forest, modelo aditivo generalizado, modelo lineal generalizado y kriging ordinario. El método kriging ordinario reflejó el grado de dependencia espacial del contenido de carbono, pero las estimaciones espaciales fueron poco realistas (R2 ≤ 0.35). El modelo aditivo generalizado y el modelo lineal generalizado mostraron buen desempeño (R2 ≥ 0.70), pero mayor sobreestimación; random forest obtuvo el mejor ajuste (R2 ≥ 0.86) para modelar contenido de carbono en ambos años evaluados. Se concluye que random forest es un método prometedor, con gran potencial para mejorar las estimaciones de carbono en el mantillo a escala de paisaje.
Zaira Rosario Pérez-Vázquez; Gregorio Ángeles-Pérez; Bruno Chávez-Vergara; José René Valdez-Lazalde; Martha Elva Ramírez-Guzmán. Enfoque espacial para modelación de carbono en el mantillo de bosques bajo manejo forestal maderable. Madera y Bosques 2021, 27, 1 .
AMA StyleZaira Rosario Pérez-Vázquez, Gregorio Ángeles-Pérez, Bruno Chávez-Vergara, José René Valdez-Lazalde, Martha Elva Ramírez-Guzmán. Enfoque espacial para modelación de carbono en el mantillo de bosques bajo manejo forestal maderable. Madera y Bosques. 2021; 27 (1):1.
Chicago/Turabian StyleZaira Rosario Pérez-Vázquez; Gregorio Ángeles-Pérez; Bruno Chávez-Vergara; José René Valdez-Lazalde; Martha Elva Ramírez-Guzmán. 2021. "Enfoque espacial para modelación de carbono en el mantillo de bosques bajo manejo forestal maderable." Madera y Bosques 27, no. 1: 1.
The effects of converting native forests to livestock systems on soil C, N and P contents across various climatic zones are not well understood for the tropical region. The goal of this study was to test how soil C, N and P dynamics are affected by the land-use change from natural forests to livestock production systems (extensive pasture and intensive silvopastoral systems) across a rainfall gradient of 1611–711 mm per year in the Mexican tropics. A total of 15 soil-based biogeochemical metrics were measured in samples collected during the dry and rainy seasons in livestock systems and mature forests for land-use and intersite comparisons of the nutrient status. Our results show that land-use change from natural forests to livestock production systems had a negative effect on soil C, N and P contents. In general, soil basal respiration and C-acquiring enzyme activities increased under livestock production systems. Additionally, reduction in mean annual rainfall affected moisture-sensitive biogeochemical processes affecting the C, N and P dynamics. Our findings imply that land-use changes alter soil C, N and P dynamics and contents, with potential negative consequences for the sustainability of livestock production systems in the tropical regions of Mexico investigated.
Daniela Figueroa; Patricia Ortega-Fernández; Thalita Abbruzzini; Anaitzi Rivero-Villlar; Francisco Galindo; Bruno Chavez-Vergara; Jorge Etchevers; Julio Campo. Effects of Land Use Change from Natural Forest to Livestock on Soil C, N and P Dynamics along a Rainfall Gradient in Mexico. Sustainability 2020, 12, 8656 .
AMA StyleDaniela Figueroa, Patricia Ortega-Fernández, Thalita Abbruzzini, Anaitzi Rivero-Villlar, Francisco Galindo, Bruno Chavez-Vergara, Jorge Etchevers, Julio Campo. Effects of Land Use Change from Natural Forest to Livestock on Soil C, N and P Dynamics along a Rainfall Gradient in Mexico. Sustainability. 2020; 12 (20):8656.
Chicago/Turabian StyleDaniela Figueroa; Patricia Ortega-Fernández; Thalita Abbruzzini; Anaitzi Rivero-Villlar; Francisco Galindo; Bruno Chavez-Vergara; Jorge Etchevers; Julio Campo. 2020. "Effects of Land Use Change from Natural Forest to Livestock on Soil C, N and P Dynamics along a Rainfall Gradient in Mexico." Sustainability 12, no. 20: 8656.
The highland forests of tropical regions are highly vulnerable to climate change because changes in soil organic quality due to the increased soil water deficit conditions through rising temperatures. Several authors have reported that labile molecules dominate soil organic matter at higher elevations, and it is therefore more vulnerable to the rising temperatures associated with climate change. The objective of the present study was to analyze the effect of interaction between the chemical composition of organic matter derived from the dominant plant species and the metabolism of microbial community along an elevational gradient in a highland forest in Central Mexico. The study compared three vegetation-soil systems that represent three different elevational levels: Alnus-system (3100 m.a.s.l.), Abies-system (3500 m.a.s.l.) and Pinus-system (3700 m.a.s.l.). The SOM produced in the lowest site is more recalcitrant (i.e., higher Alkyl:O-Alkyl ratio) as a result of the lower water availability than in the highest site. The results of Threshold Elemental RatioC:N (TERC:N) and TERC:P for the organic layer were lower than their C:N and C:P ratios in the organic layer, supporting that the microbial community of the organic layer in the site of lowest elevation must be limited by the carbon source, rather than by N and P. However, these results were not found in the mineral soil, suggesting that the drivers of organic matter decomposition differ between the organic layer and the mineral soil. As a conclusion, our results suggest that the chemical recalcitrance of organic matter (at the lowest site) and temperature (at the highest site) reduce the microbial metabolic activity in the forest floor. Integrated study of plant-derived organic material and the microbial metabolism of the forest floor is therefore required to achieve a full understanding of the vulnerability of tropical mountain ecosystems to climate change.
Isela Jasso-Flores; Leopoldo Galicia; Bruno Chávez-Vergara; Agustín Merino; Yunuen Tapia-Torres; Felipe García-Oliva. Soil organic matter dynamics and microbial metabolism along an altitudinal gradient in Highland tropical forests. Science of The Total Environment 2020, 741, 140143 .
AMA StyleIsela Jasso-Flores, Leopoldo Galicia, Bruno Chávez-Vergara, Agustín Merino, Yunuen Tapia-Torres, Felipe García-Oliva. Soil organic matter dynamics and microbial metabolism along an altitudinal gradient in Highland tropical forests. Science of The Total Environment. 2020; 741 ():140143.
Chicago/Turabian StyleIsela Jasso-Flores; Leopoldo Galicia; Bruno Chávez-Vergara; Agustín Merino; Yunuen Tapia-Torres; Felipe García-Oliva. 2020. "Soil organic matter dynamics and microbial metabolism along an altitudinal gradient in Highland tropical forests." Science of The Total Environment 741, no. : 140143.
In this work, we present the results of a soil study in the Teuhtli volcano, located to the south of the Basin of Mexico with the aim to understand the pedogenetic pathways and the evolution of the landscape dynamics. Two different types of soil prof iles were sampled: in “conserved” areas, with less anthropogenic influence and in sites with intense agriculture activities since pre-Hispanic times. The three conserved prof iles are located in different landscape positions: the Cima prof ile in the summit, the Ladera prof ile in the high slope, and the Yotecón in a lower position of the piedemont. The agriculture prof iles are La Cruz, La Era and El Llano, situated in the foothill. Properties in both kind of soils are similar, however, in agriculture sites, structure (evaluated in macro and microscale) is weaker, total organic carbon content is smaller and bulk density is higher. Both soils show two main pedogenetic processes: andosolization and carbonate formation. Despite the age of the parent material (36 000 years), the Andosol phase has not been lost. This is because of the geomorphological dynamics of the zone, in which the processes of erosion and colluviation promote soil loss, restarting the pedogenetic clock. The detection of lithological discontinuities (by the Ti/Zr ratio) documents these processes. By the other hand, the formation of pedogenic carbonates is governed by the seasonal conditions of drought. The age of these carbonates places their formation in the mid-Holocene, an epoch for which drier conditions are detected in other sites of the Basin of Mexico. The agricultural land use has also promoted morphological, chemical and physical changes in the soils. The continuous tillage of the sites has prevented the soils from developing. This could have a negative effect on the fertility of those soils currently used to sustain the peri-urban agroecosystems of Mexico City.
Elizabeth Solleiro-Rebolledo; Yazmín Rivera-Uria; Bruno Chávez-Vergara; Jaime Diaz-Ortega; Sergey Sedov; Jorge René Alcalá-Martínez; Ofelia Ivette Beltrán-Paz; Luis Gerardo Jardines-Martínez. Evolution of the landscape and pedodiversity on volcanic deposits in the south of the Basin of Mexico and its relationship with agricultural activities. REVISTA TERRA LATINOAMERICANA 2019, 37, 501 -518.
AMA StyleElizabeth Solleiro-Rebolledo, Yazmín Rivera-Uria, Bruno Chávez-Vergara, Jaime Diaz-Ortega, Sergey Sedov, Jorge René Alcalá-Martínez, Ofelia Ivette Beltrán-Paz, Luis Gerardo Jardines-Martínez. Evolution of the landscape and pedodiversity on volcanic deposits in the south of the Basin of Mexico and its relationship with agricultural activities. REVISTA TERRA LATINOAMERICANA. 2019; 37 (4):501-518.
Chicago/Turabian StyleElizabeth Solleiro-Rebolledo; Yazmín Rivera-Uria; Bruno Chávez-Vergara; Jaime Diaz-Ortega; Sergey Sedov; Jorge René Alcalá-Martínez; Ofelia Ivette Beltrán-Paz; Luis Gerardo Jardines-Martínez. 2019. "Evolution of the landscape and pedodiversity on volcanic deposits in the south of the Basin of Mexico and its relationship with agricultural activities." REVISTA TERRA LATINOAMERICANA 37, no. 4: 501-518.
Environmental conditions and human-landscape interaction during the onset of the irrigated agriculture in Oasisamerica are not clear yet. In la Playa site (Sonora, NW Mexico), the evidences of sedentary population, land cultivation, and water management developed after the end of Altithermal period (around 4500 yr BP) include more than 550 archaeological features including hundreds of human cremations and a net of buried artificial channels. These findings were closely associated with several palaeosol levels alternating with sediments within a large alluvial fan. We studied micromorphological features, physical characteristics (color, texture, rock magnetic properties), and composition of organic matter, from three profiles (Maravillas, Zanja, and Cuatro Suelos), to reconstruct pedogenesis and sedimentary environment of the palaeosol sequences. Additional paleoenvironmental information was extracted from pollen assemblages, extracted from the Cuatro Suelos profile. The results pointed to a long period of geomorphic and climatic stability in the early-middle Holocene marked by a well-developed red Cambisol. This period was followed by an unstable interval around 4.5 kyr BP marked by severe erosion of earlier soil profiles and sedimentation of different kind: channel, floodplain, and fluvio-eolian. Later synsedimentary Fluvisols were formed showing signs of predominantly arid pedogenesis, interrupted by occasional flooding; indicators of human impact were also encountered. We conclude that the shift to irrigated agriculture as the main subsistence activity occurred during the period of major climatic and geomorphic fluctuation and then irrigation developed further under dry environment with limited water resources during the Late Holocene.
Georgina Ibarra – Arzave; Elizabeth Solleiro-Rebolledo; Bruno Chávez-Vergara; Sergey Sedov; Carmen Ortega-Rosas; Guadalupe Sánchez; Thanairi Gamez; Hermenegildo Barceinas-Cruz; Emmanuel Ayala; Bruno Chávez. Environmental setting of the early irrigation in Oasisamerica: Paleopedological evidences from the alluvial palaeosols in la Playa/Sonoran Desert. Quaternary International 2018, 516, 160 -174.
AMA StyleGeorgina Ibarra – Arzave, Elizabeth Solleiro-Rebolledo, Bruno Chávez-Vergara, Sergey Sedov, Carmen Ortega-Rosas, Guadalupe Sánchez, Thanairi Gamez, Hermenegildo Barceinas-Cruz, Emmanuel Ayala, Bruno Chávez. Environmental setting of the early irrigation in Oasisamerica: Paleopedological evidences from the alluvial palaeosols in la Playa/Sonoran Desert. Quaternary International. 2018; 516 ():160-174.
Chicago/Turabian StyleGeorgina Ibarra – Arzave; Elizabeth Solleiro-Rebolledo; Bruno Chávez-Vergara; Sergey Sedov; Carmen Ortega-Rosas; Guadalupe Sánchez; Thanairi Gamez; Hermenegildo Barceinas-Cruz; Emmanuel Ayala; Bruno Chávez. 2018. "Environmental setting of the early irrigation in Oasisamerica: Paleopedological evidences from the alluvial palaeosols in la Playa/Sonoran Desert." Quaternary International 516, no. : 160-174.
Background Litter decomposition is a key process in the functioning of forest ecosystems, because it strongly controls nutrient recycling and soil fertility maintenance. The interaction between the litter chemical composition and the metabolism of the soil microbial community has been described as the main factor of the decomposition process based on three hypotheses: substrate-matrix interaction (SMI), functional breadth (FB) and home-field advantage (HFA). The objective of the present study was to evaluate the effect of leaf litter quality (as a direct plant effect, SMI hypothesis), the metabolic capacity of the microbial community (as a legacy effect, FB hypothesis), and the coupling between the litter quality and microbial activity (HFA hypothesis) on the litter decomposition of two contiguous deciduous oak species at a local scale. Methods To accomplish this objective, we performed a litterbag experiment in the field for 270 days to evaluate mass loss, leaf litter quality and microbial activity in a complete factorial design for litter quality and species site. Results The litter of Quercus deserticola had higher rate of decomposition independently of the site, while the site of Quercus castanea promoted a higher rate of decomposition independently of the litter quality, explained by the specialization of the soil microbial community in the use of recalcitrant organic compounds. The Home-Field Advantage Index was reduced with the decomposition date (22% and 4% for 30 and 270 days, respectively). Discussion We observed that the importance of the coupling of litter quality and microbial activity depends on decomposition stage. At the early decomposition stage, the home-advantage hypothesis explained the mass loss of litter; however, in the advanced decomposition stage, the litter quality and the metabolic capacity of the microbial community can be the key drivers.
Bruno Chávez-Vergara; Agustín Merino; Antonio González-Rodríguez; Ken Oyama; Felipe García-Oliva. Direct and legacy effects of plant-traits control litter decomposition in a deciduous oak forest in Mexico. PeerJ 2018, 6, e5095 .
AMA StyleBruno Chávez-Vergara, Agustín Merino, Antonio González-Rodríguez, Ken Oyama, Felipe García-Oliva. Direct and legacy effects of plant-traits control litter decomposition in a deciduous oak forest in Mexico. PeerJ. 2018; 6 ():e5095.
Chicago/Turabian StyleBruno Chávez-Vergara; Agustín Merino; Antonio González-Rodríguez; Ken Oyama; Felipe García-Oliva. 2018. "Direct and legacy effects of plant-traits control litter decomposition in a deciduous oak forest in Mexico." PeerJ 6, no. : e5095.
Simple, rapid and reliable methods of assessing soil burn severity (SBS) are required in order to prioritize post-fire emergency stabilization actions. SBS proxies based on visual identification and changes in soil organic matter (SOM) content and quality can be related to other soil properties in order to determine the extent to which soil is perturbed following fire. This task is addressed in the present study by an approach involving the use of differential scanning calorimetry-thermogravimetric analysis (DSC-TGA) to determine changes in SOM generated in soils subjected to different levels of SBS. Intact topsoil monoliths comprising the organic horizons and the surface mineral soil (alumic-humic umbrisols) were collected from a representative P. pinaster stand in NW Spain. The monoliths were experimentally burned in a combustion wind tunnel to simulate different fire conditions (fuel bed comprising forest pine litter and wood; air flow, 0.6 m s−1). Changes in OM properties in the soil organic layer and mineral soils samples (0–2 cm) at the different temperatures and SBS levels were identified. For both duff and mineral soil, the data revealed a temperature-induced increase in aromatic compounds and a concomitant decrease of carbohydrates and alkyl products. However, for a given temperature, the degree of carbonization/aromatization was lower in the mineral soil than in the duff, possibly due to the different composition of the OM and to the different combustion conditions. The low degree of aromatization of the organic matter suggests that this soil component could undergo subsequent biological degradation. SOM content and thermal recalcitrance (measured as T50) discriminated the SBS levels. Use of visual identification of SBS levels in combination with DSC-TGA enables rapid evaluation of the spatial variability of the effects of fire on SOM properties. This information is useful to predict soil degradation process and implement emergency soil stabilization techniques.
Agustín Merino; María T. Fonturbel; Cristina Fernández; Bruno Chávez-Vergara; Felipe García-Oliva; Jose A. Vega. Inferring changes in soil organic matter in post-wildfire soil burn severity levels in a temperate climate. Science of The Total Environment 2018, 627, 622 -632.
AMA StyleAgustín Merino, María T. Fonturbel, Cristina Fernández, Bruno Chávez-Vergara, Felipe García-Oliva, Jose A. Vega. Inferring changes in soil organic matter in post-wildfire soil burn severity levels in a temperate climate. Science of The Total Environment. 2018; 627 ():622-632.
Chicago/Turabian StyleAgustín Merino; María T. Fonturbel; Cristina Fernández; Bruno Chávez-Vergara; Felipe García-Oliva; Jose A. Vega. 2018. "Inferring changes in soil organic matter in post-wildfire soil burn severity levels in a temperate climate." Science of The Total Environment 627, no. : 622-632.
Los bosques templados de México representan la distribución más sur de este ecosistema en el hemisferio norte y constituyen alrededor de 20% de la cobertura forestal de México, lo que los hace la clase de bosques más ampliamente distribuida. No obstante la importancia de su extensión geográfica es el tipo de vegetación menos estudiado desde el punto de vista socioecológico. El enfoque de estudio que ha predominado en este tipo de vegetación es el silvícola, guiado por la visión de mantener un flujo continuo de madera para el mercado e ingresos de los propietarios forestales, sin considerar la provisión de otros beneficios y servicios ecosistémicos. En este estudio se propone la integración de un enfoque socioecológico que promueva integrar las dependencias sociedad-naturaleza que ocurren en los bosques templados. En este contexto es imperativo: 1) entender la influencia de las especies de pinos y encinos de los bosques templados en la estructura y funcionamiento de estos bosques, en particular sobre la productividad primaria; 2) entender el impacto que tienen el cambio de uso del suelo, la extracción regulada y no regulada de biomasa sobre la estructura y el funcionamiento del ecosistema y 3) entender los aspectos sociales y económicos relacionados con diferentes herramientas de conservación (áreas naturales protegidas y pago de servicios ambientales), que representan esquemas de interacción sociedad-naturaleza. Se discute cómo la investigación y evaluación bajo este enfoque puede contribuir a reducir el enorme déficit en la producción maderable que persiste en México, proteger la diversidad biológica y mantener la provisión de los servicios ecosistémicos para el bienestar humano.
Leopoldo Galicia; Bruno Manuel Chávez-Vergara; Melanie Kolb; Rosa Isela Jasso-Flores; Laura Alicia Rodríguez-Bustos; Lesly Elizabeth Solís; Vidal Guerra De La Cruz; Enrique Pérez Campuzano; Antonio Villanueva. Perspectivas del enfoque socioecológico en la conservación, el aprovechamiento y pago de servicios ambientales de los bosques templados de México. Madera y Bosques 2018, 24, 1 .
AMA StyleLeopoldo Galicia, Bruno Manuel Chávez-Vergara, Melanie Kolb, Rosa Isela Jasso-Flores, Laura Alicia Rodríguez-Bustos, Lesly Elizabeth Solís, Vidal Guerra De La Cruz, Enrique Pérez Campuzano, Antonio Villanueva. Perspectivas del enfoque socioecológico en la conservación, el aprovechamiento y pago de servicios ambientales de los bosques templados de México. Madera y Bosques. 2018; 24 (2):1.
Chicago/Turabian StyleLeopoldo Galicia; Bruno Manuel Chávez-Vergara; Melanie Kolb; Rosa Isela Jasso-Flores; Laura Alicia Rodríguez-Bustos; Lesly Elizabeth Solís; Vidal Guerra De La Cruz; Enrique Pérez Campuzano; Antonio Villanueva. 2018. "Perspectivas del enfoque socioecológico en la conservación, el aprovechamiento y pago de servicios ambientales de los bosques templados de México." Madera y Bosques 24, no. 2: 1.
Maricarmen Salazar-Ledesma; Lucy Mora; Bruno Chávez; Daniel Gomez; Olivia Zamora; Blanca Prado. Susceptibilidad del suelo al impacto humano: caso del herbicida atrazina. Boletín de la Sociedad Geológica Mexicana 2018, 70, 95 -119.
AMA StyleMaricarmen Salazar-Ledesma, Lucy Mora, Bruno Chávez, Daniel Gomez, Olivia Zamora, Blanca Prado. Susceptibilidad del suelo al impacto humano: caso del herbicida atrazina. Boletín de la Sociedad Geológica Mexicana. 2018; 70 (1):95-119.
Chicago/Turabian StyleMaricarmen Salazar-Ledesma; Lucy Mora; Bruno Chávez; Daniel Gomez; Olivia Zamora; Blanca Prado. 2018. "Susceptibilidad del suelo al impacto humano: caso del herbicida atrazina." Boletín de la Sociedad Geológica Mexicana 70, no. 1: 95-119.
In forest ecosystems, microbial community structure and activity play an important role in C and nutrient dynamics and are strongly influenced by litter composition. Moreover, litter decomposition rates also depend on microbial activity. Fungi are a key component of the microbial community as they produce extracellular hydrolytic and oxidative enzymes that degrade organic polymers and mobilize inorganic nutrients. In this study, we examined how litter composition affects microbial activity and fungal community structure by comparing decomposing litter derived from sympatric Quercus castanea (Qc) and Quercus deserticola (Qd) in a deciduous forest in Mexico. Microbial N and P biomass were higher in the Qd litter than in the Qc litter. The differences in N and P were seasonal and were not observed at the end of the rainy season (October). The specific enzyme activity was higher in the Qc than in the Qd litter, mainly at the onset of senescence (May). At this time, phenol oxidase and β-glucosidase activities were significantly higher in the Qc litter than in the Qd litter; thereby the nutrient acquisition strategies of the microbial community differ in the litter derived from each Quercus species. Internal transcribed spacer sequence analysis of the fungal community indicated higher richness (24 operational taxonomic units: OTUs) in the Qc litter than in the Qd litter (18 OTUs). Six taxonomic orders of microbes were common to both types of litter, and the phylum Basidiomycota was most abundant in the Qc litter. The lignin and tannin contents were highest in the Qc litter, which also contained diverse fungal taxa associated with POX production. The findings of the present study suggest that the Quercus species control the organic nutrient mineralization by determining the composition and activity of the forest floor microbial community.
Bruno Chávez-Vergara; Andrei Rosales-Castillo; Agustín Merino; Gerardo Vázquez-Marrufo; Ken Oyama; Felipe García-Oliva. Quercus species control nutrients dynamics by determining the composition and activity of the forest floor fungal community. Soil Biology and Biochemistry 2016, 98, 186 -195.
AMA StyleBruno Chávez-Vergara, Andrei Rosales-Castillo, Agustín Merino, Gerardo Vázquez-Marrufo, Ken Oyama, Felipe García-Oliva. Quercus species control nutrients dynamics by determining the composition and activity of the forest floor fungal community. Soil Biology and Biochemistry. 2016; 98 ():186-195.
Chicago/Turabian StyleBruno Chávez-Vergara; Andrei Rosales-Castillo; Agustín Merino; Gerardo Vázquez-Marrufo; Ken Oyama; Felipe García-Oliva. 2016. "Quercus species control nutrients dynamics by determining the composition and activity of the forest floor fungal community." Soil Biology and Biochemistry 98, no. : 186-195.
Agustín Merino; Bruno Chávez-Vergara; Josefa Salgado; María T. Fonturbel; Felipe García-Oliva; Jose A. Vega. Variability in the composition of charred litter generated by wildfire in different ecosystems. CATENA 2015, 133, 52 -63.
AMA StyleAgustín Merino, Bruno Chávez-Vergara, Josefa Salgado, María T. Fonturbel, Felipe García-Oliva, Jose A. Vega. Variability in the composition of charred litter generated by wildfire in different ecosystems. CATENA. 2015; 133 ():52-63.
Chicago/Turabian StyleAgustín Merino; Bruno Chávez-Vergara; Josefa Salgado; María T. Fonturbel; Felipe García-Oliva; Jose A. Vega. 2015. "Variability in the composition of charred litter generated by wildfire in different ecosystems." CATENA 133, no. : 52-63.
Foliar nutrient resorption (FNR) is a key process in the dynamics of nutrients in a forest ecosystem. Along with other factors, FNR regulates the chemical composition of the forest floor and, consequently, the rates of organic matter decomposition and soil nutrient availability. The main objective of the present study was to examine the effect of FNR of two deciduous oak species ( and ) in the litter and soil nutrient dynamics, in addition to analyze whether the interaction between two species was positive (synergistic) or negative (antagonistic) through the mixed litter from two species. For this purpose, the nutrient concentration of green leaves, litterfall, litter and soil was measured, as well as soil microbial activity. These measurements were taken in isolated stands with the presence of one of the oak species and stands with the two oak species mixed. , with lower FNR, produced litter with a higher N concentration, which apparently enhancing microbial activity in the forest floor litter and increased nutrient transformations and soil fertility. In contrast, has a higher FNR and produced litter with a lower nutrient concentration. The microbial soil community associated with must therefore invest more energy in metabolic processes at the expense of biomass growth. However, forest floor nutrient transformations were more intense and soil fertility increased in areas where both species intermix; in this case, the latter species received the rich-nutrient litterfall of . These results suggest a strong footprint of species traits on microbial activities and soil nutrient transformations.
Bruno M. Chávez-Vergara; Antonio González-Rodríguez; Jorge D. Etchevers; Ken Oyama; Felipe García-Oliva. Foliar nutrient resorption constrains soil nutrient transformations under two native oak species in a temperate deciduous forest in Mexico. European Journal of Forest Research 2015, 134, 803 -817.
AMA StyleBruno M. Chávez-Vergara, Antonio González-Rodríguez, Jorge D. Etchevers, Ken Oyama, Felipe García-Oliva. Foliar nutrient resorption constrains soil nutrient transformations under two native oak species in a temperate deciduous forest in Mexico. European Journal of Forest Research. 2015; 134 (5):803-817.
Chicago/Turabian StyleBruno M. Chávez-Vergara; Antonio González-Rodríguez; Jorge D. Etchevers; Ken Oyama; Felipe García-Oliva. 2015. "Foliar nutrient resorption constrains soil nutrient transformations under two native oak species in a temperate deciduous forest in Mexico." European Journal of Forest Research 134, no. 5: 803-817.
Bruno Chavez-Vergara; Agustín Merino; Gerardo Vázquez-Marrufo; Felipe García-Oliva. Organic matter dynamics and microbial activity during decomposition of forest floor under two native neotropical oak species in a temperate deciduous forest in Mexico. Geoderma 2014, 235-236, 133 -145.
AMA StyleBruno Chavez-Vergara, Agustín Merino, Gerardo Vázquez-Marrufo, Felipe García-Oliva. Organic matter dynamics and microbial activity during decomposition of forest floor under two native neotropical oak species in a temperate deciduous forest in Mexico. Geoderma. 2014; 235-236 ():133-145.
Chicago/Turabian StyleBruno Chavez-Vergara; Agustín Merino; Gerardo Vázquez-Marrufo; Felipe García-Oliva. 2014. "Organic matter dynamics and microbial activity during decomposition of forest floor under two native neotropical oak species in a temperate deciduous forest in Mexico." Geoderma 235-236, no. : 133-145.