| publications-2051 |
Peer reviewed articles |
2023 |
Jade A. Ezzedine; Clarisse Uwizeye; Grégory Si Larbi; Gaelle Villain; Mathilde Louwagie; Marion Schilling; Pascal Hagenmuller; Benoît Gallet; Adeline Stewart; Dimitris Petroutsos; Fabienne Devime; Pascal Salze; Lucie Liger; Juliette Jouhet; Marie Dumont; Stéphane Ravanel; Alberto Amato; Jean-Gabriel Valay; Pierre-Henri Jouneau; Denis Falconet; Eric Maréchal |
Adaptive traits of cysts of the snow alga Sanguina nivaloides unveiled by 3D subcellular imaging |
Nature Communications |
10.21203/rs.3.rs-3038444/v1 |
Simulation & Modeling |
Precipitation & Ecological Systems |
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Abstract Sanguina nivaloides is the main alga forming red snowfields in high mountains and Polar Regions. It is non-cultivable. Analysis of environmental samples by X-ray tomography, focused-ion-beam scanning-electron-microscopy, physicochemical and physiological characterization reveal adaptive traits accounting for algal capacity to reside in snow. Cysts populate liquid water at the periphery of ice, are photosynthetically active, can survive for months, and are sensitive to freezing. They harbour a wrinkled plasma membrane expanding the interface with environment. Ionomic analysis supports a cell efflux of K+, and assimilation of phosphorus. Glycerolipidomic analysis confirms a phosphate limitation. The chloroplast contains thylakoids oriented in all directions, fixes carbon in a central pyrenoid and produces starch in peripheral protuberances. Analysis of cells stored in the dark show that starch is a short-term carbon storage. The biogenesis of cytosolic droplets shows that they are loaded with triacylglycerol and carotenoids for long-term carbon storage and protection against oxidative stress. |
949516 |
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| publications-2052 |
Peer reviewed articles |
2021 |
Qing Zhan, Xiangzhen Kong & Karsten Rinke |
High-frequency monitoring enables operational opportunities to reduce the dissolved organic carbon (DOC) load in Germany’s largest drinking water reservoir |
Inland Waters |
10.1080/20442041.2021.1987796 |
Uncategorized |
Wastewater Treatment Plants |
|
No abstract available |
956623 |
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| publications-2053 |
Peer reviewed articles |
2022 |
Xiangzhen Kong; Maria Determann; Tobias Kuhlmann Andersen; Carolina Cerqueira Barbosa; Tallent Dadi; Annette B.G. Janssen; Ma. Cristina Paule-Mercado; Diego Guimarães Florencio Pujoni; Martin Schultze; Karsten Rinke |
Synergistic Effects of Warming and Internal Nutrient Loading Interfere with the Long-Term Stability of Lake Restoration and Induce Sudden Re-eutrophication |
Water Research |
10.1016/j.watres.2022.118721 |
Uncategorized |
Wastewater Treatment Plants |
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No abstract available |
956623 |
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| publications-2054 |
Peer reviewed articles |
2023 |
Xiangzhen Kong; Maria Determann; Tobias Kuhlmann Andersen; Carolina Cerqueira Barbosa; Tallent Dadi; Annette B.G. Janssen; Ma. Cristina Paule-Mercado; Diego Guimarães Florencio Pujoni; Martin Schultze; Karsten Rinke |
Synergistic Effects of Warming and Internal Nutrient Loading Interfere with the Long-Term Stability of Lake Restoration and Induce Sudden Re-eutrophication |
Environmental Science and Technology |
10.1021/acs.est.2c07181 |
Data Management & Analytics |
Precipitation & Ecological Systems |
|
No abstract available |
956623 |
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| publications-2055 |
Peer reviewed articles |
2024 |
Ilaria, Micella; Carolien, Kroeze; Mirjam P, Bak; Maryna, Strokal |
Causes of coastal waters pollution with nutrients, chemicals and plastics worldwide |
Marine Pollution Bulletin |
10.1016/j.marpolbul.2023.115902 |
Data Management & Analytics |
Precipitation & Ecological Systems |
|
No abstract available |
956623 |
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| publications-2056 |
Peer reviewed articles |
2023 |
CUNILLERA-MONTCUSÍ, D.; FERNÁNDEZ-CALERO, J.M.; PÖLSTERL, S.; ARGELICH, R.; CID, N.; BONADA, N. & CAÑEDO-ARGÜELLES, M. |
Navigating through space and time : a methodological approach to quantify spatitemporal connectivity using stream flow data as a stydy case. |
Methods in Ecology and Evolution |
10.1111/2041-210x.14105 |
Data Management & Analytics |
River Basins |
|
Abstract The growing interest in combining spatial and temporal patterns in nature has been fostered by the current availability of high‐frequency measurements. However, we still lack a methodological framework to process and interpret spatiotemporal datasets into meaningful values, adaptable to different time windows and/or responding to different spatial structures. Here, we developed and tested a framework to evaluate spatiotemporal connectivity using two new measures: the spatiotemporal connectivity (STcon) and the spatiotemporal connectivity matrix (STconmat). To obtain these measures, we consider a set of spatially connected sites within a temporally dynamic network. These measures are calculated from a spatiotemporal matrix where spatial and temporal connections across sites are captured. These connections respond to a determined network structure, assign different values to these connections and generate different scenarios from which we obtain the spatiotemporal connectivity. We developed these measures by using a dataset of stream flow state spanning a 513‐day period obtained from data loggers installed in seven temporary streams. These measures allowed us to characterise connectivity among stream reaches and relate spatiotemporal patterns with macroinvertebrate community structure and composition. Spatiotemporal connectivity differed within and among streams, with STcon and STconmat capturing different hydrological patterns. Macroinvertebrate richness and diversity were higher in more spatiotemporally connected sites. Community dissimilarity was related to STconmat showing that more spatiotemporally connected sites had similar communities for active and passive dispersers. Interestingly, both groups were related to spatiotemporal connectivity patterns for some of the analysed scenarios, highlighting the relevance of spatiotemporal connectivity in dynamic systems. As we exemplified, the proposed framework can help to disentangle and quantify spatiotemporal dynamics or be applied in the conservation of dynamic systems such as temporary streams. However, the current framework is not limited to the temporal and spatial features of temporary streams. It can be extended to other ecosystems by including different time windows and/or consider different network structures to assess spatiotemporal patterns. Such spatiotemporal measures are especially relevant in a context of global change, with the spatiotemporal dynamics of ecosystems being heavily disrupted by human activities. |
869226 |
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| publications-2057 |
Peer reviewed articles |
2022 |
Alisha L. Steward,Thibault Datry,Simone D. Langhans |
The terrestrial and semi-aquatic invertebrates of intermittent rivers and ephemeral streams |
Biological reviews |
10.1111/brv.12848 |
Data Management & Analytics |
River Basins |
|
ABSTRACTIntermittent rivers and ephemeral streams (IRES), which cease flow and/or dry at some point, are the most abundant waterways on earth, and are found on every continent. They can support a diverse, and often abundant, terrestrial and semi‐aquatic invertebrate (TSAI) fauna, which has been poorly explored due to its position at the fringe between aquatic and terrestrial disciplines. TSAIs can inhabit a variety of habitat types, including the shoreline, the surface of exposed gravel bars, unsaturated gravels, dry riverbeds, riparian zones, and floodplains. Much less is known about the species composition and ecological roles of TSAIs of IRES than their aquatic counterparts, with TSAIs being largely overlooked in conceptual models, legislation, policy, and ecological monitoring. Herein we review the TSAI literature that has increased substantially over the last decade and present conceptual models describing how TSAIs respond to hydrological changes in IRES. Then, we test these models with data collected during wet and dry phases in IRES from Australia and France. These generic models can be utilised by water managers and policy makers, ensuring that both wet and dry phases are considered in the management and protection of IRES. IRES should be viewed as a habitat continuum through time, with taxa from a pool of aquatic, semi‐aquatic and terrestrial invertebrates inhabiting at any hydrological stage. We call for collaboration among terrestrial and aquatic ecologists to explore these invertebrates and ecosystems further. |
869226 |
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| publications-2058 |
Peer reviewed articles |
2021 |
Núria Cid; Tibor Erős; Jani Heino; Gabriel Singer; Sonja C. Jähnig; Sonja C. Jähnig; Miguel Cañedo-Argüelles; Núria Bonada; Romain Sarremejane; Heikki Mykrä; Leonard Sandin; Riikka Paloniemi; Liisa Varumo; Thibault Datry |
From meta-system theory to the sustainable management of rivers in the Anthropocene |
https://hal.archives-ouvertes.fr/hal-03369152 |
10.1002/fee.2417 |
Simulation & Modeling |
River Basins |
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Regional‐scale ecological processes, such as the spatial flows of material, energy, and organisms, are fundamental for maintaining biodiversity and ecosystem functioning in river networks. Yet these processes remain largely overlooked in most river management practices and underlying policies. Here, we propose adoption of a meta‐system approach, where regional processes acting at different levels of ecological organization – populations, communities, and ecosystems – are integrated into conventional river conservation, restoration, and biomonitoring. We also describe a series of measurements and indicators that could be assimilated into the implementation of relevant biodiversity and environmental policies. Finally, we highlight the need for alternative management strategies that can guide practitioners toward applying recent advances in ecology to preserve and restore river ecosystems and the ecosystem services they provide, in the context of increasing alteration of river network connectivity worldwide. |
869226 |
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| publications-2059 |
Peer reviewed articles |
2021 |
Julie Crabot,Cedric P. Mondy,Philippe Usseglio-Polatera,Ken M. Fritz,Paul J. Wood,Michelle J. Greenwood,Michael T. Bogan,Elisabeth I. Meyer,Thibault Datry |
A global perspective on the functional responses of stream communities to flow intermittence |
Ecography |
10.1111/ecog.05697 |
Data Management & Analytics |
River Basins |
|
The current erosion of biodiversity is a major concern that threatens the ecological integrity of ecosystems and the ecosystem services they provide. Due to global change, an increasing proportion of river networks are drying and changes from perennial to non‐perennial flow regimes represent dramatic ecological shifts with potentially irreversible alterations of community and ecosystem dynamics. However, there is minimal understanding of how biological communities respond functionally to drying. Here, we highlight the taxonomic and functional responses of aquatic macroinvertebrate communities to flow intermittence across river networks from three continents, to test predictions from underlying trait‐based conceptual theory. We found a significant breakpoint in the relationship between taxonomic and functional richness, indicating higher functional redundancy at sites with flow intermittence higher than 28%. Multiple strands of evidence, including patterns of alpha and beta diversity and functional group membership, indicated that functional redundancy did not compensate for biodiversity loss associated with increasing intermittence, contrary to received wisdom. A specific set of functional trait modalities, including small body size, short life span and high fecundity, were selected with increasing flow intermittence. These results demonstrate the functional responses of river communities to drying and suggest that on‐going biodiversity reduction due to global change in drying river networks is threatening their functional integrity. These results indicate that such patterns might be common in these ecosystems, even where drying is considered a predictable disturbance. This highlights the need for the conservation of natural drying regimes of intermittent rivers to secure their ecological integrity. |
869226 |
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| publications-2060 |
Peer reviewed articles |
2021 |
Blackman, R. C., F. Altermatt, A. Foulquier, T. Lefébure, M. Gauthier, A. Bouchez, R. Stubbington, A. M. Weigand, F. Leese, and T. Datry. |
Unlocking our understanding of intermittent rivers and ephemeral streams with genomic tools |
Frontiers in Ecology and the Environment |
10.1002/fee.2404 |
Data Management & Analytics |
River Basins |
|
Intermittent rivers and ephemeral streams (IRES) – waterways in which flow ceases periodically or that dry completely – are found worldwide, and their frequency and extent are expected to increase in the future in response to global climate change and growing anthropogenic demand for fresh water. Repeated wet–dry cycles generate highly dynamic settings within river networks composed of aquatic and terrestrial habitats, which act as evolutionary triggers for aquatic and terrestrial biota. Drying also alters functions and processes within river networks, with consequences for ecosystem services. Despite the emergence of promising conceptual and methodological developments, our understanding of the occurrence and diversity of organisms in these ecosystems is limited primarily due to their coupled aquatic–terrestrial characteristics. Novel genomic tools based on high‐throughput sequencing have the potential to tackle unanswered questions of pivotal importance to predict future change in IRES. Here, we outline why genomic tools are needed to assess these dynamic ecosystems from the population to the metacommunity scale, and their potential role in bridging ecological–evolutionary dynamics. |
869226 |
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