Combined Effects of Ocean Warming and Acidification on Copepod Abundance, Body Size and Fatty Acid Content DOI Creative Commons
Jessica Garzke,

Thomas Hansen,

Stefanie M. H. Ismar

et al.

PLoS ONE, Journal Year: 2016, Volume and Issue: 11(5), P. e0155952 - e0155952

Published: May 25, 2016

Concerns about increasing atmospheric CO2 concentrations and global warming have initiated studies on the consequences of multiple-stressor interactions marine organisms ecosystems. We present a fully-crossed factorial mesocosm study assess how acidification affect abundance, body size, fatty acid composition copepods as measure nutritional quality. The experimental set-up allowed us to determine whether effects act additively, synergistically, or antagonistically content copepods, major group lower level consumers in food webs. Copepodite (developmental stages 1–5) nauplii abundance were affected by acidification. Higher temperature decreased copepodite while partially compensated for effect. adult was negatively warming. prosome length significantly reduced warming, interaction length. Fatty also saturated acids increased, ratios polyunsaturated essential docosahexaenoic- (DHA) arachidonic (ARA) total increased with higher temperatures. Additionally, here significant additive effect both parameters acid. Our results indicate that future ocean scenario, might counteract some observed zooplankton, adding others. These may be fertilizing phytoplankton copepod source. In summary, populations will more strongly rather than acidifying oceans, but can modify impacts.

Language: Английский

Disruption of ecological networks in lakes by climate change and nutrient fluctuations DOI Creative Commons
Ewa Merz, Erik Saberski, Luis J. Gilarranz

et al.

Nature Climate Change, Journal Year: 2023, Volume and Issue: 13(4), P. 389 - 396

Published: March 23, 2023

Climate change interacts with local processes to threaten biodiversity by disrupting the complex network of ecological interactions. While changes in interactions drastically affect ecosystems, how networks respond climate change, particular warming and nutrient supply fluctuations, is largely unknown. Here, using an equation-free modelling approach on monthly plankton community data ten Swiss lakes, we show that number strength fluctuate nonlinearly water temperature phosphorus. lakes system-specific responses, generally reduces interactions, particularly under high phosphate levels. This reorganization shifts trophic control food webs, leading consumers being controlled resources. Small grazers cyanobacteria emerge as sensitive indicators networks. By exposing outcomes a interplay between environmental drivers, our results provide tools for studying advancing understanding impacts entire communities.

Language: Английский

Citations

55
Harmful algal blooms in inland waters DOI
Lian Feng, Ying Wang, Xuejiao Hou

et al.

Nature Reviews Earth & Environment, Journal Year: 2024, Volume and Issue: 5(9), P. 631 - 644

Published: Aug. 27, 2024

Language: Английский

Citations

34
Floating photovoltaics strongly reduce water temperature: A whole-lake experiment DOI Creative Commons
Regina L. G. Nobre, Chloé Vagnon, Stéphanie Boulêtreau

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 375, P. 124230 - 124230

Published: Jan. 29, 2025

Language: Английский

Citations

2
Distinct phytoplankton size classes respond differently to biotic and abiotic factors DOI Creative Commons

Stefanie Eyring,

Ewa Merz, Marta Reyes

et al.

ISME Communications, Journal Year: 2025, Volume and Issue: 5(1)

Published: Jan. 1, 2025

Abstract The interplay between abiotic (resource supply, temperature) and biotic (grazing) factors determines growth loss processes in phytoplankton through resource competition trophic interactions, which are mediated by morphological traits like size. Here, we study the relative importance of grazers, water physics, chemistry on daily net accumulation rates (ARs) individual from natural communities, grouped into six size classes circa 10 to 500 μm. Using a Random Forest modelling approach 4 years data lake, find that temperature is generally pivotal control all ARs. At same time, nutrients light important for smallest largest classes. Mesozooplankton abundance key predictor AR small phytoplankton, with microzooplankton being middle-size range. In our data, large have different (seasonal) blooming patterns: forms favoured low grazing, high phosphorus levels. Larger show positive ARs at temperatures (being relatively insensitive zooplankton grazing). These results help us understand opportunities limitations using explain model responses environmental change.

Language: Английский

Citations

2
Prediction of surface temperature in lakes with different morphology using air temperature DOI
Marco Toffolon, Sebastiano Piccolroaz, Bruno Majone

et al.

Limnology and Oceanography, Journal Year: 2014, Volume and Issue: 59(6), P. 2185 - 2202

Published: Oct. 12, 2014

Temperature of the surface layer temperate lakes is reconstructed by means a simplified model on basis air temperature alone. The comparison between calculated and observed data shows remarkable agreement (Nash–Sutcliffe efficiency indices always larger than 0.87, mean absolute errors approximately 1°C) for all 14 investigated (Mara, Sparkling, Superior, Michigan, Huron, Erie, Ontario, Biel, Zurich, Constance, Garda, Neusiedl, Balaton, Baikal, in west‐to‐east order), which present wide range morphological hydrological characteristics. Differently from pure heat flux balance approach, where different fluxes are determined independent relationships, input directly inform parameters simple that, turn, provides meaningful information about properties real system. dependence main indicators presented, allows quantitative description strong influence depth lake thermal inertia hysteresis pattern temperatures.

Language: Английский

Citations

155
Life in the salinity gradient: Discovering mechanisms behind a new biodiversity pattern DOI
Irena V. Telesh, Hendrik Schubert, Sergei Skarlato

et al.

Estuarine Coastal and Shelf Science, Journal Year: 2013, Volume and Issue: 135, P. 317 - 327

Published: Oct. 24, 2013

Language: Английский

Citations

141
Lake surface temperatures in a changing climate: a global sensitivity analysis DOI
Martin Schmid, Stefan Hunziker, Alfred Wüest

et al.

Climatic Change, Journal Year: 2014, Volume and Issue: 124(1-2), P. 301 - 315

Published: March 4, 2014

Language: Английский

Citations

137
People, pollution and pathogens – Global change impacts in mountain freshwater ecosystems DOI
Dirk S. Schmeller, Adeline Loyau, Kunshan Bao

et al.

The Science of The Total Environment, Journal Year: 2017, Volume and Issue: 622-623, P. 756 - 763

Published: Dec. 13, 2017

Language: Английский

Citations

129
Satellite remote sensing of phytoplankton phenology in Lake Balaton using 10years of MERIS observations DOI Creative Commons
Stéphanie Palmer, Daniel Odermatt, Peter Hunter

et al.

Remote Sensing of Environment, Journal Year: 2015, Volume and Issue: 158, P. 441 - 452

Published: Jan. 2, 2015

Phytoplankton biomass is important to monitor in lakes due its influence on water quality and lake productivity. has also been identified as sensitive environmental change, with shifts the seasonality of blooms, or phenology, resulting from changing temperature nutrient conditions. A satellite remote sensing approach retrieving mapping freshwater phytoplankton phenology demonstrated here application Lake Balaton, Hungary. Chlorophyll-a (chl-a) concentration using Medium Resolution Imaging Spectrometer (MERIS) allows new insights into such spatiotemporal dynamics for Balaton bloom start, peak end timing, duration, maximum chl-a concentrations, spatial extent, rates increase decrease, integral. TIMESAT software used extract map these metrics. Three approaches time series smoothing are compared mapped metrics evaluated comparison situ chl-a. The high degree both temporal variability highlighted discussed, methodological limitations correlation between Both feasibility novel permitted through demonstrated, priority topics future research suggested.

Language: Английский

Citations

118
The competing impacts of climate change and nutrient reductions on dissolved oxygen in Chesapeake Bay DOI Creative Commons

Isaac D. Irby,

Marjorie A. M. Friedrichs, Fei Da

et al.

Biogeosciences, Journal Year: 2018, Volume and Issue: 15(9), P. 2649 - 2668

Published: May 4, 2018

Abstract. The Chesapeake Bay region is projected to experience changes in temperature, sea level, and precipitation as a result of climate change. This research uses an estuarine-watershed hydrodynamic–biogeochemical modeling system along with mid-21st-century freshwater flow, level rise explore the impact change may have on future dissolved-oxygen (DO) concentrations potential success nutrient reductions attaining mandated estuarine water quality improvements. Results indicate that warming bay waters will decrease oxygen solubility year-round, while also increasing utilization via respiration remineralization, primarily impacting bottom spring. Rising increase circulation, reducing residence time stratification. As result, are increase, at mid-depths (3 < DO 5 mg L−1) typically decrease. Changes deliver higher winter spring flow loads, fueling increased primary production. Together, these multiple impacts lower throughout negatively progress towards meeting standards associated Total Maximum Daily Load. However, this shows be significantly smaller than improvements expected response required reductions, especially anoxic hypoxic levels. Overall, temperature exhibits strongest control concentrations, due decreased solubility, exert small positive river anticipated negative impact.

Language: Английский

Citations

105