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Jonathan D. Tonkin
School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch, 8140, New Zealand

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Journal article
Published: 17 June 2021 in Marine Environmental Research
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Given the ecological and biogeochemical importance of rhodolith beds, it is necessary to investigate how future environmental conditions will affect these organisms. We investigated the impacts of increased nutrient concentrations, acidification, and marine heatwaves on the performance of the rhodolith-forming species Lithothamnion crispatum in a short-term experiment, including the recovery of individuals after stressor removal. Furthermore, we developed an ecological niche model to establish which environmental conditions determine its current distribution along the Brazilian coast and to project responses to future climate scenarios. Although L. crispatum suffered a reduction in photosynthetic performance when exposed to stressors, they returned to pre-experiment values following the return of individuals to control conditions. The model showed that the most important variables in explaining the current distribution of L. crispatum on the Brazilian coast were maximum nitrate and temperature. In future ocean conditions, the model predicted a range expansion of habitat suitability for this species of approximately 58.5% under RCP 8.5. Physiological responses to experimental future environmental conditions corroborated model predictions of the expansion of this species’ habitat suitability in the future. This study, therefore, demonstrates the benefits of applying combined approaches to examine potential species responses to climate-change drivers from multiple angles.

ACS Style

Gabrielle Koerich; Giulia Burle Costa; Marina Nasri Sissini; Carlos Lopez Ortiz; Beatriz Feltrin Canever; Willian Oliveira; Jonathan D. Tonkin; Paulo Antunes Horta. Physiology, Niche Characteristics and Extreme Events: Current and Future Habitat Suitability of a Rhodolith-Forming Species in the Southwestern Atlantic. Marine Environmental Research 2021, 169, 105394 .

AMA Style

Gabrielle Koerich, Giulia Burle Costa, Marina Nasri Sissini, Carlos Lopez Ortiz, Beatriz Feltrin Canever, Willian Oliveira, Jonathan D. Tonkin, Paulo Antunes Horta. Physiology, Niche Characteristics and Extreme Events: Current and Future Habitat Suitability of a Rhodolith-Forming Species in the Southwestern Atlantic. Marine Environmental Research. 2021; 169 ():105394.

Chicago/Turabian Style

Gabrielle Koerich; Giulia Burle Costa; Marina Nasri Sissini; Carlos Lopez Ortiz; Beatriz Feltrin Canever; Willian Oliveira; Jonathan D. Tonkin; Paulo Antunes Horta. 2021. "Physiology, Niche Characteristics and Extreme Events: Current and Future Habitat Suitability of a Rhodolith-Forming Species in the Southwestern Atlantic." Marine Environmental Research 169, no. : 105394.

Freshwater ecology
Published: 09 June 2021 in Ecosphere
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River biodiversity is threatened globally by hydropower dams, and there is a need to understand how dam management favors certain species while filtering out others. We examined aquatic invertebrate communities within the tailwaters 0–24 km downstream of seven large hydropower dams in the Colorado River Basin of the western United States. We quantified aquatic invertebrate dominance, richness, abundance, and biomass at multiple locations within individual tailwaters and across the basin and identified biological community responses associated with dam operations and distance from dam. We found that each tailwater was dominated by 3–7 invertebrate taxa, accounting for 95% of total abundance. Half of these dominant taxa were non-insect, non-flying species and thus were unavailable to terrestrial consumers. Consistent with previous studies, aquatic insects and sensitive taxa were negatively associated with hydropeaking intensity (magnitude of daily flow fluctuations associated with hydropower generation), which limits the composition and potentially the quality of the invertebrate food base. While total invertebrate abundance and biomass did not change with increasing distance downstream from dams, insect and sensitive taxa richness, abundance, and biomass all increased, suggesting that impacts of hydropeaking are most acute immediately downstream of dams. Our results demonstrate that tailwaters experiencing hydropeaking support high abundances of aquatic invertebrate, but the diversity of these communities is low.

ACS Style

Erin F. Abernethy; Jeffrey D. Muehlbauer; Theodore A. Kennedy; Jonathan D. Tonkin; Richard Van Driesche; David A. Lytle. Hydropeaking intensity and dam proximity limit aquatic invertebrate diversity in the Colorado River Basin. Ecosphere 2021, 12, e03559 .

AMA Style

Erin F. Abernethy, Jeffrey D. Muehlbauer, Theodore A. Kennedy, Jonathan D. Tonkin, Richard Van Driesche, David A. Lytle. Hydropeaking intensity and dam proximity limit aquatic invertebrate diversity in the Colorado River Basin. Ecosphere. 2021; 12 (6):e03559.

Chicago/Turabian Style

Erin F. Abernethy; Jeffrey D. Muehlbauer; Theodore A. Kennedy; Jonathan D. Tonkin; Richard Van Driesche; David A. Lytle. 2021. "Hydropeaking intensity and dam proximity limit aquatic invertebrate diversity in the Colorado River Basin." Ecosphere 12, no. 6: e03559.

Research communications
Published: 03 May 2021 in Frontiers in Ecology and the Environment
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Overcoming challenges of water scarcity necessitates creative flow management approaches that account for multiple, potentially competing water needs of plants and animals in river ecosystems. Mechanistic multispecies models can guide decision making by evaluating trade‐offs associated with flow regimes designed for specific ecosystem outcomes before implementation. We investigated the cross‐ecosystem effects of environmental flow regimes designed to benefit focal groups of riparian vegetation, fishes, and invertebrates. The models revealed trade‐offs among different designer flow regimes with narrow taxonomic targets, which in some cases caused non‐target taxa to become locally extirpated within short (decadal) timespans. By incorporating multiple flow frequencies – from intra‐annual‐scale pulses to large decadal‐scale floods – the simulated natural flow regime enabled balanced, albeit smaller, population sizes across the three ecosystem components: 72% of that achieved by designer flow regimes, on average. Although returning to a natural flow regime may not be possible in highly flow‐modified rivers, novel flow regimes must incorporate diverse flood and drought frequencies to accommodate the occasionally conflicting requirements of different taxa at different times.

ACS Style

Jonathan D Tonkin; Julian D Olden; David M Merritt; Lindsay V Reynolds; Jane S Rogosch; David A Lytle. Designing flow regimes to support entire river ecosystems. Frontiers in Ecology and the Environment 2021, 19, 326 -333.

AMA Style

Jonathan D Tonkin, Julian D Olden, David M Merritt, Lindsay V Reynolds, Jane S Rogosch, David A Lytle. Designing flow regimes to support entire river ecosystems. Frontiers in Ecology and the Environment. 2021; 19 (6):326-333.

Chicago/Turabian Style

Jonathan D Tonkin; Julian D Olden; David M Merritt; Lindsay V Reynolds; Jane S Rogosch; David A Lytle. 2021. "Designing flow regimes to support entire river ecosystems." Frontiers in Ecology and the Environment 19, no. 6: 326-333.

Preprint content
Published: 11 April 2021
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It is well recognized that within local communities, fluctuations of constituent species over time can alter both aggregate (e.g., total abundance or biomass) and compositional community properties. At broader spatial scales, recent evidence shows how spatial asynchrony can further stabilize aggregate properties at the regional, or metacommunity, scale. Yet, apparent lack of variability in aggregate metacommunity properties can mask changes in metacommunity composition, and a framework acknowledging such dual nature of metacommunity variability is still lacking. Here, we present an approach to characterize metacommunity variability that integrates both aggregate and compositional properties. We demonstrate that the compositional variability of a metacommunity critically depends on the degree of spatial synchrony in the compositional trajectories over time among local communities. We develop two methods, available in the ltmc R package, to quantify such spatial compositional synchrony and apply them to a case study of understory macroalgal communities inhabiting shallow rocky reefs off the coast of Santa Barbara, California. We found that moderate spatial asynchrony reduced variability in aggregate metacommunity biomass, whilst masking synchronous, and potentially destabilizing, compositional variability at the metacommunity scale. These results highlight the need to consider both aspects of metacommunity variability simultaneously in order to fully understand variability over broad spatial scales.

ACS Style

Thomas Lamy; Nathan I. Wisnoski; Riley Andrade; Max C.N. Castorani; Aldo Compagnoni; Nina Lany; Luca Marazzi; Sydne Record; Christopher M. Swan; Jonathan D. Tonkin; Nicole Voelker; Shaopeng Wang; Phoebe L. Zarnetske; Eric R. Sokol. The dual nature of metacommunity variability. 2021, 1 .

AMA Style

Thomas Lamy, Nathan I. Wisnoski, Riley Andrade, Max C.N. Castorani, Aldo Compagnoni, Nina Lany, Luca Marazzi, Sydne Record, Christopher M. Swan, Jonathan D. Tonkin, Nicole Voelker, Shaopeng Wang, Phoebe L. Zarnetske, Eric R. Sokol. The dual nature of metacommunity variability. . 2021; ():1.

Chicago/Turabian Style

Thomas Lamy; Nathan I. Wisnoski; Riley Andrade; Max C.N. Castorani; Aldo Compagnoni; Nina Lany; Luca Marazzi; Sydne Record; Christopher M. Swan; Jonathan D. Tonkin; Nicole Voelker; Shaopeng Wang; Phoebe L. Zarnetske; Eric R. Sokol. 2021. "The dual nature of metacommunity variability." , no. : 1.

Opinion
Published: 31 December 2020 in WIREs Water
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A recent global meta‐analysis reported a decrease in terrestrial but increase in freshwater insect abundance and biomass (van Klink et al., Science 368, p. 417). The authors suggested that water quality has been improving, thereby challenging recent reports documenting drastic global declines in freshwater biodiversity. We raise two major concerns with the meta‐analysis and suggest that these account for the discrepancy with the declines reported elsewhere. First, total abundance and biomass alone are poor indicators of the status of freshwater insect assemblages, and the observed differences may well have been driven by the replacement of sensitive species with tolerant ones. Second, many of the datasets poorly represent global trends and reflect responses to local conditions or nonrandom site selection. We conclude that the results of the meta‐analysis should not be considered indicative of an overall improvement in the condition of freshwater ecosystems. This article is categorized under: Water and Life > Conservation, Management, and Awareness

ACS Style

Sonja C. Jähnig; Viktor Baranov; Florian Altermatt; Peter Cranston; Martin Friedrichs‐Manthey; Juergen Geist; Fengzhi He; Jani Heino; Daniel Hering; Franz Hölker; Jonas Jourdan; Gregor Kalinkat; Jens Kiesel; Florian Leese; Alain Maasri; Michael T. Monaghan; Ralf B. Schäfer; Klement Tockner; Jonathan D. Tonkin; Sami Domisch. Revisiting global trends in freshwater insect biodiversity. WIREs Water 2020, 8, 1 .

AMA Style

Sonja C. Jähnig, Viktor Baranov, Florian Altermatt, Peter Cranston, Martin Friedrichs‐Manthey, Juergen Geist, Fengzhi He, Jani Heino, Daniel Hering, Franz Hölker, Jonas Jourdan, Gregor Kalinkat, Jens Kiesel, Florian Leese, Alain Maasri, Michael T. Monaghan, Ralf B. Schäfer, Klement Tockner, Jonathan D. Tonkin, Sami Domisch. Revisiting global trends in freshwater insect biodiversity. WIREs Water. 2020; 8 (2):1.

Chicago/Turabian Style

Sonja C. Jähnig; Viktor Baranov; Florian Altermatt; Peter Cranston; Martin Friedrichs‐Manthey; Juergen Geist; Fengzhi He; Jani Heino; Daniel Hering; Franz Hölker; Jonas Jourdan; Gregor Kalinkat; Jens Kiesel; Florian Leese; Alain Maasri; Michael T. Monaghan; Ralf B. Schäfer; Klement Tockner; Jonathan D. Tonkin; Sami Domisch. 2020. "Revisiting global trends in freshwater insect biodiversity." WIREs Water 8, no. 2: 1.

Journal article
Published: 12 November 2020 in Science of The Total Environment
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Environmental heterogeneity and dispersal limitation are important drivers of beta diversity; however, their relative influence on the two fundamental components of beta diversity (i.e., species replacement and richness difference) has not been fully examined in montane streams. Here, we examined the relative importance of local environmental gradients and three physical distance matrices (i.e., overland, watercourse and cost distances) on beta diversity and its two components for a macroinvertebrate metacommunity in a stream network. To provide additional insights into community assembly, we also analysed variation in two deconstructed sub-communities based on dispersal ability (i.e., weak and strong dispersers). Both environmental filters and physical distances (dispersal limitation) drove patterns of overall beta diversity, with the former generally prevailing over the latter. Species replacement components showed stronger correlations with environmental gradients than physical distances, while the opposite is true for the richness difference components. Overland distances were generally more important than cost and watercourse distances for community dissimilarity of stream macroinvertebrates, implying that lateral dispersal out of stream corridors through flight was the major dispersal route in the studied steam network. As expected, community dissimilarity of strong dispersers was primarily shaped by environmental filtering, while community dissimilarity of weak dispersers was associated with the joint effects of environmental filtering and dispersal limitation. Our findings demonstrate that partitioning overall dissimilarity into species replacement and richness difference provides more insights into the processes driving spatial variability in biological communities compared with the utilization of total beta diversity alone. Our results support the notion that maintaining environmental heterogeneity and natural connectivity of stream networks should be effective measures to conserve regional biodiversity.

ACS Style

Zhengfei Li; Xiao Chen; XiaoMing Jiang; Jonathan D. Tonkin; Zhicai Xie; Jani Heino. Distance decay of benthic macroinvertebrate communities in a mountain river network: Do dispersal routes and dispersal ability matter? Science of The Total Environment 2020, 758, 143630 .

AMA Style

Zhengfei Li, Xiao Chen, XiaoMing Jiang, Jonathan D. Tonkin, Zhicai Xie, Jani Heino. Distance decay of benthic macroinvertebrate communities in a mountain river network: Do dispersal routes and dispersal ability matter? Science of The Total Environment. 2020; 758 ():143630.

Chicago/Turabian Style

Zhengfei Li; Xiao Chen; XiaoMing Jiang; Jonathan D. Tonkin; Zhicai Xie; Jani Heino. 2020. "Distance decay of benthic macroinvertebrate communities in a mountain river network: Do dispersal routes and dispersal ability matter?" Science of The Total Environment 758, no. : 143630.

Review article
Published: 07 April 2020 in Aquatic Conservation: Marine and Freshwater Ecosystems
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Motivated by recent global initiatives for biodiversity conservation and restoration, this article reviews the gaps in our understanding of, and the challenges facing, freshwater macroinvertebrate biodiversity and conservation in tropical regions. This study revealed a lack of adequate taxonomic, phylogenetic, and ecological information for most macroinvertebrate groups, and consequently there are large‐scale knowledge gaps regarding the response of macroinvertebrate diversity to potential climate change and other human impacts in tropical regions. We propose ideas to reduce the impact of key drivers of declines in macroinvertebrate biodiversity, including habitat degradation and loss, hydrological alteration, overexploitation, invasive species, pollution, and the multiple impacts of climate change. The review also provides recommendations to enhance conservation planning in these systems (as well as providing clear management plans at local, regional, and national levels), integrated catchment management, the formulation of regulatory measures, the understanding of the determinants of macroinvertebrate diversity across multiple scales and taxonomic groups, and the collaboration between researchers and conservation professionals. It is suggested that the integrated use of macroinvertebrate biodiversity information in biomonitoring can improve ecosystem management. This goal can be facilitated in part by conservation psychology, marketing, and the use of the media and the Internet.

ACS Style

S. Sundar; Jani Heino; Fabio De Oliveira Roque; John P. Simaika; Adriano S. Melo; Jonathan D. Tonkin; Davidson Gomes Nogueira; Daniel Paiva Silva. Conservation of freshwater macroinvertebrate biodiversity in tropical regions. Aquatic Conservation: Marine and Freshwater Ecosystems 2020, 30, 1238 -1250.

AMA Style

S. Sundar, Jani Heino, Fabio De Oliveira Roque, John P. Simaika, Adriano S. Melo, Jonathan D. Tonkin, Davidson Gomes Nogueira, Daniel Paiva Silva. Conservation of freshwater macroinvertebrate biodiversity in tropical regions. Aquatic Conservation: Marine and Freshwater Ecosystems. 2020; 30 (6):1238-1250.

Chicago/Turabian Style

S. Sundar; Jani Heino; Fabio De Oliveira Roque; John P. Simaika; Adriano S. Melo; Jonathan D. Tonkin; Davidson Gomes Nogueira; Daniel Paiva Silva. 2020. "Conservation of freshwater macroinvertebrate biodiversity in tropical regions." Aquatic Conservation: Marine and Freshwater Ecosystems 30, no. 6: 1238-1250.

Preprint content
Published: 10 January 2020
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Overcoming the challenges of water scarcity will require creative approaches to flow management and modeling approaches that forecast the effects of management actions on multiple ecosystem components simultaneously. Using a mechanistic multispecies modeling approach, we investigated the cross-ecosystem effects of environmental flow regimes designed for specific ecosystem outcomes. We reveal tradeoffs associated with flow regimes targeting riparian vegetation, fishes, and invertebrates. The different frequencies associated with each flow regime in some cases caused non-target ecosystem components to become locally extirpated within short (decadal) timespans. By incorporating multiple flow frequencies (from intraannual-scale pulses to large decadal-scale floods), the natural flow regime enabled a balanced but sub-optimal response of the three ecosystem components (mean 72% of designer flow). Although returning to a natural flow regime may not be possible in highly managed rivers, novel flow regimes must incorporate diverse frequencies inherent to such a regime and accommodate the sometimes conflicting requirements of different taxa at different times.

ACS Style

Jonathan D. Tonkin; Julian D. Olden; David. M. Merritt; Lindsay V. Reynolds; Jane S. Rogosch; David A. Lytle. Designing flow regimes to support entire river ecosystems. 2020, 1 .

AMA Style

Jonathan D. Tonkin, Julian D. Olden, David. M. Merritt, Lindsay V. Reynolds, Jane S. Rogosch, David A. Lytle. Designing flow regimes to support entire river ecosystems. . 2020; ():1.

Chicago/Turabian Style

Jonathan D. Tonkin; Julian D. Olden; David. M. Merritt; Lindsay V. Reynolds; Jane S. Rogosch; David A. Lytle. 2020. "Designing flow regimes to support entire river ecosystems." , no. : 1.

Journal article
Published: 16 May 2019 in International Journal of Environmental Research and Public Health
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Urbanization is increasing worldwide and is happening at a rapid rate in China in line with economic development. Urbanization can lead to major changes in freshwater environments through multiple chemical and microbial contaminants. We assessed the impact of urbanization on physicochemical characteristics and microbial loading in canals in Suzhou, a city that has experienced rapid urbanization in recent decades. Nine sampling locations covering three urban intensity classes (high, medium and low) in Suzhou were selected for field studies and three locations in Huangshan (natural reserve) were included as pristine control locations. Water samples were collected for physicochemical, microbiological and molecular analyses. Compared to medium and low urbanization sites, there were statistically significant higher levels of nutrients and total and thermotolerant coliforms (or fecal coliforms) in highly urbanized locations. The effect of urbanization was also apparent in the abundances of human-associated fecal markers and bacterial pathogens in water samples from highly urbanized locations. These results correlated well with land use types and anthropogenic activities at the sampling sites. The overall results indicate that urbanization negatively impacts water quality, providing high levels of nutrients and a microbial load that includes fecal markers and pathogens.

ACS Style

Tianma Yuan; Kiran Kumar Vadde; Jonathan D. Tonkin; Jianjun Wang; Jing Lu; Zimeng Zhang; Yixin Zhang; Alan J. McCarthy; Raju Sekar. Urbanization Impacts the Physicochemical Characteristics and Abundance of Fecal Markers and Bacterial Pathogens in Surface Water. International Journal of Environmental Research and Public Health 2019, 16, 1739 .

AMA Style

Tianma Yuan, Kiran Kumar Vadde, Jonathan D. Tonkin, Jianjun Wang, Jing Lu, Zimeng Zhang, Yixin Zhang, Alan J. McCarthy, Raju Sekar. Urbanization Impacts the Physicochemical Characteristics and Abundance of Fecal Markers and Bacterial Pathogens in Surface Water. International Journal of Environmental Research and Public Health. 2019; 16 (10):1739.

Chicago/Turabian Style

Tianma Yuan; Kiran Kumar Vadde; Jonathan D. Tonkin; Jianjun Wang; Jing Lu; Zimeng Zhang; Yixin Zhang; Alan J. McCarthy; Raju Sekar. 2019. "Urbanization Impacts the Physicochemical Characteristics and Abundance of Fecal Markers and Bacterial Pathogens in Surface Water." International Journal of Environmental Research and Public Health 16, no. 10: 1739.

Review paper
Published: 20 January 2019 in River Research and Applications
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Resilience in river ecosystems requires that organisms must persist in the face of highly dynamic hydrological and geomorphological variations. Disturbance events such as floods and droughts are postulated to shape life history traits that support resilience, but river management and conservation would benefit from greater understanding of the emergent effects in communities of river organisms. We unify current knowledge of taxonomic‐, phylogenetic‐, and trait‐based aspects of river communities that might aid the identification and quantification of resilience mechanisms. Temporal variations in river productivity, physical connectivity, and environmental heterogeneity resulting from floods and droughts are highlighted as key characteristics that promote resilience in these dynamic ecosystems. Three community‐wide mechanisms that underlie resilience are (a) partitioning (competition/facilitation) of dynamically varying resources, (b) dispersal, recolonization, and recruitment promoted by connectivity, and (c) functional redundancy in communities promoted by resource heterogeneity and refugia. Along with taxonomic and phylogenetic identity, biological traits related to feeding specialization, dispersal ability, and habitat specialization mediate organism responses to disturbance. Measures of these factors might also enable assessment of the relative contributions of different mechanisms to community resilience. Interactions between abiotic drivers and biotic aspects of resource use, dispersal, and persistence have clear implications for river conservation and management. To support these management needs, we propose a set of taxonomic, phylogenetic, and life‐history trait metrics that might be used to measure resilience mechanisms. By identifying such indicators, our proposed framework can enable targeted management strategies to adapt river ecosystems to global change.

ACS Style

Kris Van Looy; Jonathan D. Tonkin; Mathieu Floury; Catherine Leigh; Janne Soininen; Stefano Larsen; Jani Heino; N LeRoy Poff; Michael Delong; Sonja C. Jähnig; Thibault Datry; Núria Bonada; Juliette Tison-Rosebery; Aurélien Jamoneau; Steve J. Ormerod; Kevin J. Collier; Christian Wolter. The three Rs of river ecosystem resilience: Resources, recruitment, and refugia. River Research and Applications 2019, 35, 107 -120.

AMA Style

Kris Van Looy, Jonathan D. Tonkin, Mathieu Floury, Catherine Leigh, Janne Soininen, Stefano Larsen, Jani Heino, N LeRoy Poff, Michael Delong, Sonja C. Jähnig, Thibault Datry, Núria Bonada, Juliette Tison-Rosebery, Aurélien Jamoneau, Steve J. Ormerod, Kevin J. Collier, Christian Wolter. The three Rs of river ecosystem resilience: Resources, recruitment, and refugia. River Research and Applications. 2019; 35 (2):107-120.

Chicago/Turabian Style

Kris Van Looy; Jonathan D. Tonkin; Mathieu Floury; Catherine Leigh; Janne Soininen; Stefano Larsen; Jani Heino; N LeRoy Poff; Michael Delong; Sonja C. Jähnig; Thibault Datry; Núria Bonada; Juliette Tison-Rosebery; Aurélien Jamoneau; Steve J. Ormerod; Kevin J. Collier; Christian Wolter. 2019. "The three Rs of river ecosystem resilience: Resources, recruitment, and refugia." River Research and Applications 35, no. 2: 107-120.

Published erratum
Published: 01 October 2018 in Science of The Total Environment
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ACS Style

Tatenda Dalu; Ryan J. Wasserman; Jonathan D. Tonkin; Mhairi E. Alexander; Mwazvita Tb Dalu; Samuel N. Motitsoe; Kwanele I. Manungo; Onias Bepe; Timothy Dube. Corrigendum to “Assessing drivers of benthic macroinvertebrate community structure in African highlands: an exploration using multivariate analysis” [Sci. Total Environ. 601–602 (2017) 1340-1348]. Science of The Total Environment 2018, 637-638, 934 .

AMA Style

Tatenda Dalu, Ryan J. Wasserman, Jonathan D. Tonkin, Mhairi E. Alexander, Mwazvita Tb Dalu, Samuel N. Motitsoe, Kwanele I. Manungo, Onias Bepe, Timothy Dube. Corrigendum to “Assessing drivers of benthic macroinvertebrate community structure in African highlands: an exploration using multivariate analysis” [Sci. Total Environ. 601–602 (2017) 1340-1348]. Science of The Total Environment. 2018; 637-638 ():934.

Chicago/Turabian Style

Tatenda Dalu; Ryan J. Wasserman; Jonathan D. Tonkin; Mhairi E. Alexander; Mwazvita Tb Dalu; Samuel N. Motitsoe; Kwanele I. Manungo; Onias Bepe; Timothy Dube. 2018. "Corrigendum to “Assessing drivers of benthic macroinvertebrate community structure in African highlands: an exploration using multivariate analysis” [Sci. Total Environ. 601–602 (2017) 1340-1348]." Science of The Total Environment 637-638, no. : 934.

Review
Published: 22 August 2018 in Biological Reviews
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Species reintroductions – the translocation of individuals to areas in which a species has been extirpated with the aim of re‐establishing a self‐sustaining population – have become a widespread practice in conservation biology. Reintroduction projects have tended to focus on terrestrial vertebrates and, to a lesser extent, fishes. Much less effort has been devoted to the reintroduction of invertebrates into restored freshwater habitats. Yet, reintroductions may improve restoration outcomes in regions where impoverished regional species pools limit the self‐recolonisation of restored freshwaters. We review the available literature on macroinvertebrate reintroductions, focusing on identifying the intrinsic and extrinsic factors that determine their success or failure. Our study reveals that freshwater macroinvertebrate reintroductions remain rare, are often published in the grey literature and, of the attempts made, approximately one‐third fail. We identify life‐cycle complexity and remaining stressors as the two factors most likely to affect reintroduction success, illustrating the unique challenges of freshwater macroinvertebrate reintroductions. Consideration of these factors by managers during the planning process and proper documentation – even if a project fails – may increase the likelihood of successful outcomes in future reintroduction attempts of freshwater macroinvertebrates.

ACS Style

Jonas Jourdan; Martin Plath; Jonathan D. Tonkin; Maria Ceylan; Arlena C. Dumeier; Georg Gellert; Wolfram Graf; Charles P. Hawkins; Ellen Kiel; Armin W. Lorenz; Christoph D. Matthaei; Piet F. M. Verdonschot; Ralf C. M. Verdonschot; Peter Haase. Reintroduction of freshwater macroinvertebrates: challenges and opportunities. Biological Reviews 2018, 94, 368 -387.

AMA Style

Jonas Jourdan, Martin Plath, Jonathan D. Tonkin, Maria Ceylan, Arlena C. Dumeier, Georg Gellert, Wolfram Graf, Charles P. Hawkins, Ellen Kiel, Armin W. Lorenz, Christoph D. Matthaei, Piet F. M. Verdonschot, Ralf C. M. Verdonschot, Peter Haase. Reintroduction of freshwater macroinvertebrates: challenges and opportunities. Biological Reviews. 2018; 94 (2):368-387.

Chicago/Turabian Style

Jonas Jourdan; Martin Plath; Jonathan D. Tonkin; Maria Ceylan; Arlena C. Dumeier; Georg Gellert; Wolfram Graf; Charles P. Hawkins; Ellen Kiel; Armin W. Lorenz; Christoph D. Matthaei; Piet F. M. Verdonschot; Ralf C. M. Verdonschot; Peter Haase. 2018. "Reintroduction of freshwater macroinvertebrates: challenges and opportunities." Biological Reviews 94, no. 2: 368-387.

Correspondence
Published: 25 July 2018 in Biological Conservation
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ACS Style

Florian T. Wetzel; Dirk S. Schmeller; Heather C. Bingham; Quentin Groom; Peter Haase; Urmas Kõljalg; Michael Kuhlmann; Corinne S. Martin; Lyubomir Penev; Tim Robertson; Hannu Saarenmaa; Stefan Stoll; Jonathan D. Tonkin; Christoph L. Häuser. Real gaps in European bird monitoring: A reply to Voříšek et al. Biological Conservation 2018, 225, 247 -248.

AMA Style

Florian T. Wetzel, Dirk S. Schmeller, Heather C. Bingham, Quentin Groom, Peter Haase, Urmas Kõljalg, Michael Kuhlmann, Corinne S. Martin, Lyubomir Penev, Tim Robertson, Hannu Saarenmaa, Stefan Stoll, Jonathan D. Tonkin, Christoph L. Häuser. Real gaps in European bird monitoring: A reply to Voříšek et al. Biological Conservation. 2018; 225 ():247-248.

Chicago/Turabian Style

Florian T. Wetzel; Dirk S. Schmeller; Heather C. Bingham; Quentin Groom; Peter Haase; Urmas Kõljalg; Michael Kuhlmann; Corinne S. Martin; Lyubomir Penev; Tim Robertson; Hannu Saarenmaa; Stefan Stoll; Jonathan D. Tonkin; Christoph L. Häuser. 2018. "Real gaps in European bird monitoring: A reply to Voříšek et al." Biological Conservation 225, no. : 247-248.

Journal article
Published: 10 July 2018 in Limnologica
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Dispersal is a fundamental trait influencing species´ distribution patterns and meta-community structure. Yet, for stream communities it remains unclear how communities differ in dispersal capacity. Due to the dendritic network structure of streams and the greater spatial variability in environmental conditions in headwaters than in mainstems, we asked three main questions: 1) Do benthic invertebrate species inhabiting headwaters have lower community-wide dispersal capacities (DCc) on average than those living in mainstems? 2) In turn, does the degree of community dissimilarity among sites differ between the different locations in the river network? 3) Are these differences more pronounced in highland streams compared to lowland streams as a consequence of major landscape features (i.e. mountains)? To examine these questions, we compiled 1,466 benthic invertebrate samples across the southern highland and northern lowland areas of Germany. Results showed that overall DCc increased with stream size in both highland and lowland streams. In highland streams, higher DCc in mainstems was associated with more homogeneous communities compared to headwater communities. However, this pattern did not occur in lowland streams. This suggests that both dispersal capacity and landscape structure interact to determine community structure in these networks. Our results therefore stress the importance of considering dispersal traits and landscape features, as well as habitat control (or environmental filtering) to better understand (meta-) community structure across various landscape types.

ACS Style

Fengqing Li; Jonathan D. Tonkin; Peter Haase. Dispersal capacity and broad-scale landscape structure shape benthic invertebrate communities along stream networks. Limnologica 2018, 71, 68 -74.

AMA Style

Fengqing Li, Jonathan D. Tonkin, Peter Haase. Dispersal capacity and broad-scale landscape structure shape benthic invertebrate communities along stream networks. Limnologica. 2018; 71 ():68-74.

Chicago/Turabian Style

Fengqing Li; Jonathan D. Tonkin; Peter Haase. 2018. "Dispersal capacity and broad-scale landscape structure shape benthic invertebrate communities along stream networks." Limnologica 71, no. : 68-74.

Contributed paper
Published: 26 June 2018 in Conservation Biology
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Although experiences with ecological restoration continue to accumulate, the effectiveness of restoration for biota remains debated. We complemented a traditional taxonomic analysis approach with information on 56 species traits to uncover the responses of three aquatic (fish, macroinvertebrates, macrophytes) and two terrestrial (carabid beetles, floodplain vegetation) biotic groups to 43 hydromorphological river restoration projects in Germany. All taxonomic groups responded positively to restoration, as shown by increased taxonomic richness (10‐164%) and trait diversity (15‐120%). Responses, however, were stronger for terrestrial than aquatic biota and, contrary to our expectation, taxonomic responses were stronger than those of traits. Nevertheless, trait analysis provided mechanistic insights into the drivers of community change following restoration. Trait analysis for terrestrial biota indicated that the pathway by which restoration succeeded was likely by enhancing lateral connectivity and re‐establishing dynamic processes in the floodplain. The weaker response of aquatic biota suggests that recovery was hindered by the persistence of stressors in the aquatic environment, such as degraded water quality, dispersal constraints and insufficient hydromorphological change. Therefore, river restoration requires combined local‐ and regional‐scale approaches to maximize the response of both aquatic and terrestrial organisms. Due to the contrasting responses of aquatic and terrestrial biota, the planning and assessment of river restoration outcomes should consider effects on both components of riverine landscapes. This article is protected by copyright. All rights reserved

ACS Style

Francesca Pilotto; Jonathan D. Tonkin; Kathrin Januschke; Armin W. Lorenz; Jonas Jourdan; Andrea Sundermann; Daniel Hering; Stefan Stoll; Peter Haase. Diverging response patterns of terrestrial and aquatic species to hydromorphological restoration. Conservation Biology 2018, 33, 132 -141.

AMA Style

Francesca Pilotto, Jonathan D. Tonkin, Kathrin Januschke, Armin W. Lorenz, Jonas Jourdan, Andrea Sundermann, Daniel Hering, Stefan Stoll, Peter Haase. Diverging response patterns of terrestrial and aquatic species to hydromorphological restoration. Conservation Biology. 2018; 33 (1):132-141.

Chicago/Turabian Style

Francesca Pilotto; Jonathan D. Tonkin; Kathrin Januschke; Armin W. Lorenz; Jonas Jourdan; Andrea Sundermann; Daniel Hering; Stefan Stoll; Peter Haase. 2018. "Diverging response patterns of terrestrial and aquatic species to hydromorphological restoration." Conservation Biology 33, no. 1: 132-141.

Journal article
Published: 25 May 2018 in PeerJ
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That biodiversity declines with latitude is well known, but whether a metacommunity process is behind this gradient has received limited attention. We tested the hypothesis that dispersal limitation is progressively replaced by mass effects with increasing latitude, along with a series of related hypotheses. We explored these hypotheses by examining metacommunity structure in stream invertebrate metacommunities spanning the length of New Zealand’s two largest islands (∼1,300 km), further disentangling the role of dispersal by deconstructing assemblages into strong and weak dispersers. Given the highly dynamic nature of New Zealand streams, our alternative hypothesis was that these systems are so unpredictable (at different stages of post-flood succession) that metacommunity structure is highly context dependent from region to region. We rejected our primary hypotheses, pinning this lack of fit on the strong unpredictability of New Zealand’s dynamic stream ecosystems and fauna that has evolved to cope with these conditions. While local community structure turned over along this latitudinal gradient, metacommunity structure was highly context dependent and dispersal traits did not elucidate patterns. Moreover, the emergent metacommunity types exhibited no trends, nor did the important environmental variables. These results provide a cautionary tale for examining singular metacommunities. The considerable level of unexplained contingency suggests that any inferences drawn from one-off snapshot sampling may be misleading and further points to the need for more studies on temporal dynamics of metacommunity processes.

ACS Style

Jonathan D. Tonkin; Russell G. Death; Timo Muotka; Anna Astorga; David A. Lytle. Do latitudinal gradients exist in New Zealand stream invertebrate metacommunities? PeerJ 2018, 6, e4898 .

AMA Style

Jonathan D. Tonkin, Russell G. Death, Timo Muotka, Anna Astorga, David A. Lytle. Do latitudinal gradients exist in New Zealand stream invertebrate metacommunities? PeerJ. 2018; 6 ():e4898.

Chicago/Turabian Style

Jonathan D. Tonkin; Russell G. Death; Timo Muotka; Anna Astorga; David A. Lytle. 2018. "Do latitudinal gradients exist in New Zealand stream invertebrate metacommunities?" PeerJ 6, no. : e4898.

Journal article
Published: 01 May 2018 in Biological Conservation
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Large quantities of biodiversity data are required to assess the current status of species, to identify drivers of population and distributional change, and to predict changes to biodiversity under future scenarios. Nevertheless, currently-available data are often not well-suited to these purposes. To highlight existing gaps, we assess the availability of species observation data in Europe, their geographic and temporal range, and their quality. We do so by reviewing the most relevant sources for European biodiversity observation data, and identifying important barriers to filling gaps. We suggest strategies, tools and frameworks to continue to fill these gaps, in addition to producing data suitable for generating Essential Biodiversity Variables (EBVs). Our review of data sources shows that only around a third of data-providers provide unrestricted data access. Particularly large geographic gaps exist in Eastern European countries and many datasets are not suitable for generating EBVs due to the absence of long-term data. We highlight examples built on recent experiences from large data integrators, publishers and networks that help to efficiently improve data availability, adopt open science principles and close existing data gaps. Future strategies must urgently consider the needs of relevant data stakeholders, particularly science- and policy-related needs, and provide incentives for data-providers. Hence, sustainable, long-term infrastructures and a European biodiversity network are needed to provide such efficient workflows, incentives for data-provision and tools.

ACS Style

Florian T. Wetzel; Heather C. Bingham; Quentin Groom; Peter Haase; Urmas Kõljalg; Michael Kuhlmann; Corinne S. Martin; Lyubomir Penev; Tim Robertson; Hannu Saarenmaa; Dirk S. Schmeller; Stefan Stoll; Jonathan D. Tonkin; Christoph L. Häuser. Unlocking biodiversity data: Prioritization and filling the gaps in biodiversity observation data in Europe. Biological Conservation 2018, 221, 78 -85.

AMA Style

Florian T. Wetzel, Heather C. Bingham, Quentin Groom, Peter Haase, Urmas Kõljalg, Michael Kuhlmann, Corinne S. Martin, Lyubomir Penev, Tim Robertson, Hannu Saarenmaa, Dirk S. Schmeller, Stefan Stoll, Jonathan D. Tonkin, Christoph L. Häuser. Unlocking biodiversity data: Prioritization and filling the gaps in biodiversity observation data in Europe. Biological Conservation. 2018; 221 ():78-85.

Chicago/Turabian Style

Florian T. Wetzel; Heather C. Bingham; Quentin Groom; Peter Haase; Urmas Kõljalg; Michael Kuhlmann; Corinne S. Martin; Lyubomir Penev; Tim Robertson; Hannu Saarenmaa; Dirk S. Schmeller; Stefan Stoll; Jonathan D. Tonkin; Christoph L. Häuser. 2018. "Unlocking biodiversity data: Prioritization and filling the gaps in biodiversity observation data in Europe." Biological Conservation 221, no. : 78-85.

Primary research paper
Published: 07 April 2018 in Hydrobiologia
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Micro-estuaries and micro-outlets represent small coastal waterbodies that differ in their relative salinity and size, with the former being larger, more saline (mesohaline versus oligohaline), and exchanging with the sea more often than the latter. There are thousands of these waterbodies along the world’s coastline, yet few of these very small systems have been identified and studied. We investigated systematic differences between micro-estuaries and micro-outlets in terms of phytoplankton community composition, including spatio-temporal variation in both community structure and biomass (chlorophyll-a). A multivariate analysis was used to assess differences in environmental variables, biomass and phytoplankton community composition across four seasons and the two waterbody types. A total of 260 (63 families) and 244 (74 families) phytoplankton taxa were identified within the micro-estuaries and micro-outlets, respectively. Nano- and picoplankton were the dominant groups in micro-estuaries, and pico- and microplankton in micro-outlets. Micro-estuaries were rich in phytoplankton taxa representative of marine, estuarine and freshwater conditions, with a successional sequence in dominance evident, from Chlorophyta during winter to Bacillariophyta in spring and Cyanophyta in summer. By contrast, micro-outlets were mostly dominated by freshwater taxa, with Chlorophyta remaining the dominant group across all four seasons. Higher phytoplankton biomass was recorded during the winter when increased nutrients were available following catchment flooding. Seasonal switching in phytoplankton was reflected not only in changing dominance patterns in both habitat types but also in complete replacement of some species in micro-outlets, despite Chlorophyta remaining dominant. Such temporal turnover, which is often accompanied by predictable seasonal changes in environmental conditions, can promote overall species richness by allowing more taxa to coexist in a single environment through temporal niche segregation.

ACS Style

Tatenda Dalu; Mandla L. Magoro; Jonathan D. Tonkin; Lucienne R. D. Human; Renzo Perissinotto; Shaun H. P. Deyzel; Janine B. Adams; Alan K. Whitfield. Assessing phytoplankton composition and structure within micro-estuaries and micro-outlets: a community analysis approach. Hydrobiologia 2018, 818, 177 -191.

AMA Style

Tatenda Dalu, Mandla L. Magoro, Jonathan D. Tonkin, Lucienne R. D. Human, Renzo Perissinotto, Shaun H. P. Deyzel, Janine B. Adams, Alan K. Whitfield. Assessing phytoplankton composition and structure within micro-estuaries and micro-outlets: a community analysis approach. Hydrobiologia. 2018; 818 (1):177-191.

Chicago/Turabian Style

Tatenda Dalu; Mandla L. Magoro; Jonathan D. Tonkin; Lucienne R. D. Human; Renzo Perissinotto; Shaun H. P. Deyzel; Janine B. Adams; Alan K. Whitfield. 2018. "Assessing phytoplankton composition and structure within micro-estuaries and micro-outlets: a community analysis approach." Hydrobiologia 818, no. 1: 177-191.

Journal article
Published: 01 April 2018 in Science of The Total Environment
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Long-term observations on riverine benthic invertebrate communities enable assessments of the potential impacts of global change on stream ecosystems. Besides increasing average temperatures, many studies predict greater temperature extremes and intense precipitation events as a consequence of climate change. In this study we examined long-term observation data (10-32years) of 26 streams and rivers from four ecoregions in the European Long-Term Ecological Research (LTER) network, to investigate invertebrate community responses to changing climatic conditions. We used functional trait and multi-taxonomic analyses and combined examinations of general long-term changes in communities with detailed analyses of the impact of different climatic drivers (i.e., various temperature and precipitation variables) by focusing on the response of communities to climatic conditions of the previous year. Taxa and ecoregions differed substantially in their response to climate change conditions. We did not observe any trend of changes in total taxonomic richness or overall abundance over time or with increasing temperatures, which reflects a compensatory turnover in the composition of communities; sensitive Plecoptera decreased in response to warmer years and Ephemeroptera increased in northern regions. Invasive species increased with an increasing number of extreme days which also caused an apparent upstream community movement. The observed changes in functional feeding group diversity indicate that climate change may be associated with changes in trophic interactions within aquatic food webs. These findings highlight the vulnerability of riverine ecosystems to climate change and emphasize the need to further explore the interactive effects of climate change variables with other local stressors to develop appropriate conservation measures.

ACS Style

Jonas Jourdan; Robert B. O'Hara; Roberta Bottarin; Kaisa-Leena Huttunen; Mathias Kuemmerlen; Don Monteith; Timo Muotka; Dāvis Ozoliņš; Riku Paavola; Francesca Pilotto; Gunta Springe; Agnija Skuja; Andrea Sundermann; Jonathan Tonkin; Peter Haase. Effects of changing climate on European stream invertebrate communities: A long-term data analysis. Science of The Total Environment 2018, 621, 588 -599.

AMA Style

Jonas Jourdan, Robert B. O'Hara, Roberta Bottarin, Kaisa-Leena Huttunen, Mathias Kuemmerlen, Don Monteith, Timo Muotka, Dāvis Ozoliņš, Riku Paavola, Francesca Pilotto, Gunta Springe, Agnija Skuja, Andrea Sundermann, Jonathan Tonkin, Peter Haase. Effects of changing climate on European stream invertebrate communities: A long-term data analysis. Science of The Total Environment. 2018; 621 ():588-599.

Chicago/Turabian Style

Jonas Jourdan; Robert B. O'Hara; Roberta Bottarin; Kaisa-Leena Huttunen; Mathias Kuemmerlen; Don Monteith; Timo Muotka; Dāvis Ozoliņš; Riku Paavola; Francesca Pilotto; Gunta Springe; Agnija Skuja; Andrea Sundermann; Jonathan Tonkin; Peter Haase. 2018. "Effects of changing climate on European stream invertebrate communities: A long-term data analysis." Science of The Total Environment 621, no. : 588-599.

Journal article
Published: 01 February 2018 in Science of The Total Environment
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Global change effects on biodiversity and human wellbeing call for improved long-term environmental data as a basis for science, policy and decision making, including increased interoperability, multifunctionality, and harmonization. Based on the example of two global initiatives, the International Long-Term Ecological Research (ILTER) network and the Group on Earth Observations Biodiversity Observation Network (GEO BON), we propose merging the frameworks behind these initiatives, namely ecosystem integrity and essential biodiversity variables, to serve as an improved guideline for future site-based long-term research and monitoring in terrestrial, freshwater and coastal ecosystems. We derive a list of specific recommendations of what and how to measure at a monitoring site and call for an integration of sites into co-located site networks across individual monitoring initiatives, and centered on ecosystems. This facilitates the generation of linked comprehensive ecosystem monitoring data, supports synergies in the use of costly infrastructures, fosters cross-initiative research and provides a template for collaboration beyond the ILTER and GEO BON communities.

ACS Style

Peter Haase; Jonathan Tonkin; Stefan Stoll; Benjamin Burkhard; Mark Frenzel; Ilse R. Geijzendorffer; Christoph Häuser; Stefan Klotz; Ingolf Kühn; William H. McDowell; Michael Mirtl; Felix Müller; Martin Musche; Johannes Penner; Steffen Zacharias; Dirk Schmeller. The next generation of site-based long-term ecological monitoring: Linking essential biodiversity variables and ecosystem integrity. Science of The Total Environment 2018, 613-614, 1376 -1384.

AMA Style

Peter Haase, Jonathan Tonkin, Stefan Stoll, Benjamin Burkhard, Mark Frenzel, Ilse R. Geijzendorffer, Christoph Häuser, Stefan Klotz, Ingolf Kühn, William H. McDowell, Michael Mirtl, Felix Müller, Martin Musche, Johannes Penner, Steffen Zacharias, Dirk Schmeller. The next generation of site-based long-term ecological monitoring: Linking essential biodiversity variables and ecosystem integrity. Science of The Total Environment. 2018; 613-614 ():1376-1384.

Chicago/Turabian Style

Peter Haase; Jonathan Tonkin; Stefan Stoll; Benjamin Burkhard; Mark Frenzel; Ilse R. Geijzendorffer; Christoph Häuser; Stefan Klotz; Ingolf Kühn; William H. McDowell; Michael Mirtl; Felix Müller; Martin Musche; Johannes Penner; Steffen Zacharias; Dirk Schmeller. 2018. "The next generation of site-based long-term ecological monitoring: Linking essential biodiversity variables and ecosystem integrity." Science of The Total Environment 613-614, no. : 1376-1384.