Global lake responses to climate change

Nature Reviews Earth & Environment, Journal Year: 2020, Volume and Issue: 1(8), P. 388 - 403

Published: July 14, 2020

Language: Английский

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Global change‐driven effects on dissolved organic matter composition: Implications for food webs of northern lakes

Global Change Biology, Journal Year: 2018, Volume and Issue: 24(8), P. 3692 - 3714

Published: March 15, 2018

Northern ecosystems are experiencing some of the most dramatic impacts global change on Earth. Rising temperatures, hydrological intensification, changes in atmospheric acid deposition and associated acidification recovery, vegetative cover resulting fundamental terrestrial–aquatic biogeochemical linkages. The effects readily observed alterations supply dissolved organic matter (DOM)—the messenger between terrestrial lake ecosystems—with potentially profound structure function lakes. contain substantial stores filter or funnel DOM, affecting timing magnitude DOM delivery to surface waters. This is processed streams, rivers, lakes, ultimately shifting its composition, stoichiometry, bioavailability. Here, we explore potential consequences these change-driven for food webs at northern latitudes. Notably, provide evidence that increased allochthonous lakes overwhelming autochthonous results from earlier ice-out a longer growing season. Furthermore, assess implications this shift nutritional quality autotrophs terms their fatty toxin production, methylmercury concentration, therefore, contaminant transfer through web. We conclude regions leads not only reduced primary productivity but also nutritionally poorer webs, with discernible trophic web fish humans.

Language: Английский

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Browning of freshwaters: Consequences to ecosystem services, underlying drivers, and potential mitigation measures

AMBIO, Journal Year: 2019, Volume and Issue: 49(2), P. 375 - 390

Published: July 31, 2019

Browning of surface waters, as a result increasing dissolved organic carbon and iron concentrations, is widespread phenomenon with implications to the structure function aquatic ecosystems. In this article, we provide an overview consequences browning in relation ecosystem services, outline what underlying drivers mechanisms are, specifically focus on exploring potential mitigation measures locally counteract browning. These topical concepts are discussed Scandinavia, but relevance also other regions. environmental concern it leads to, e.g., costs risks for drinking water production, reduced fish production lakes by limiting light penetration. While climate change, recovery from acidification, land-use change all likely factors contributing observed browning, managing land use hydrologically connected parts landscape may be most feasible way natural waters.

Language: Английский

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Impacts of Global Change on Ocean Dissolved Organic Carbon (DOC) Cycling

Frontiers in Marine Science, Journal Year: 2020, Volume and Issue: 7

Published: June 23, 2020

The marine dissolved organic carbon (DOC) pool is an important player in the functioning of ecosystems. DOC at interface between chemical and biological worlds, it fuels food webs, a major component Earth's system. Here, we review research showing impacts global change stressors on cycling, specifically: ocean warming stratification, acidification, deoxygenation, glacial sea ice melting, changed inflow from rivers, changing circulation upwelling, wet/dry deposition. A unified outcome future these production degradation not possible, due to regional differences impacts, but general patterns for each stressor are presented.

Language: Английский

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The effects of forest management on water quality

Forest Ecology and Management, Journal Year: 2022, Volume and Issue: 522, P. 120397 - 120397

Published: Aug. 22, 2022

Language: Английский

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Climate change and mercury in the Arctic: Abiotic interactions

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 824, P. 153715 - 153715

Published: Feb. 9, 2022

Dramatic environmental shifts are occuring throughout the Arctic from climate change, with consequences for cycling of mercury (Hg). This review summarizes latest science on how change is influencing Hg transport and biogeochemical in terrestrial, freshwater marine ecosystems. As changes continue to accelerate, a clearer picture emerging profound cryosphere, their connections cycling. Modeling results suggest influences seasonal interannual variability atmospheric deposition. The clearest evidence current effects terrestrial catchments, where widespread permafrost thaw, glacier melt coastal erosion increasing export downstream environments. Recent estimates large global reservoir Hg, which vulnerable degradation warming, although fate soil unclear. development thermokarst features, formation expansion thaw lakes, increased landscapes river particulate-bound altering conditions aquatic transformations. Greater organic matter may also be Hg. More severe frequent wildfires within across boreal regions contributing pool Climate remain poorly understood. Seasonal evasion retention inorganic altered by reduced sea-ice cover higher chloride content snow. Experimental indicates warmer temperatures enhance methylmercury production ocean lake sediments as well tundra soils. Improved geographic coverage measurements modeling approaches needed better evaluate net long-term implications contamination Arctic.

Language: Английский

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Centennial‐long trends of lake browning show major effect of afforestation

Limnology and Oceanography Letters, Journal Year: 2017, Volume and Issue: 2(4), P. 105 - 112

Published: June 5, 2017

Abstract Observations of increasing water color and organic carbon concentrations in lakes are widespread across the Northern Hemisphere. The drivers these trends debated. Declining atmospheric sulfur deposition has been put forward as an important underlying factor, since recovery from acidification enhances mobility matter surrounding soils. This would suggest that current browning represents a return to more natural state. study explores historical lake data Sweden—1935 2015—providing unique opportunity see how why varied during almost century. shows not primary driver over this period. I propose observed is large extent driven by major transition agriculture forestry.

Language: Английский

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Beyond respiration: Controls on lateral carbon fluxes across the terrestrial‐aquatic interface

Limnology and Oceanography Letters, Journal Year: 2018, Volume and Issue: 3(3), P. 76 - 88

Published: Feb. 19, 2018

Abstract Understanding what controls the lateral flux of organic and inorganic carbon from landscapes to surface waters is key fully understanding terrestrial ecosystem balances, biogeochemistry freshwaters, how hydrologically‐mediated movement between these ecosystems may be altered by global change. In this paper, we synthesize current knowledge identify major gaps in our land‐to‐water fluxes dissolved particulate carbon, CO 2 , bicarbonate exploring: (1) variations soil stocks affect gaseous production profile transport via terrestrial‐aquatic flow paths, (2) effect change on fluxes. Our aim develop a roadmap guide future research linkages cycle within context changes climate, biogeochemical cycles, land use.

Language: Английский

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Light and nutrient control phytoplankton biomass responses to global change in northern lakes

Global Change Biology, Journal Year: 2019, Volume and Issue: 25(6), P. 2021 - 2029

Published: March 21, 2019

Global change affects terrestrial loadings of colored dissolved organic carbon (DOC) and nutrients to northern lakes. Still, little is known about how phytoplankton respond changes in light nutrient availability across gradients lake DOC. In this study, we used results from whole-lake studies Sweden show that annual mean biomass expressed unimodal curved relationships DOC gradients, peaking at threshold levels around 11 mg/L. Whole-lake single enrichment selected lakes caused elevated biomass, with most pronounced effect the level. These patterns give support suggested dual control by on via (positively) (negatively) imply lakes' location along axis critical determining what extent and/or loadings. By using data large Swedish Lake Monitoring Survey, further estimated 80% are below threshold, potentially experiencing increased browning alone, combined enrichment. The previous model effects eutrophication phytoplankton, provide important understanding may future global changes.

Language: Английский

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The browning and re-browning of lakes: Divergent lake-water organic carbon trends linked to acid deposition and climate change

Scientific Reports, Journal Year: 2019, Volume and Issue: 9(1)

Published: Nov. 13, 2019

Abstract Dissolved organic carbon (DOC) concentrations and water colour are increasing in many inland waters across northern Europe northeastern North America. This inland-water “browning” has profound physical, chemical biological repercussions for aquatic ecosystems affecting quality, community structures productivity. Potential drivers of this trend complex include reductions atmospheric acid deposition, changes land use/cover, increased nitrogen deposition climate change. However, because the overlapping impacts these stressors, their relative contributions to DOC dynamics remain unclear, without appropriate long-term monitoring data, it not been possible determine whether ongoing is unprecedented or simply a “re-browning” pre-industrial levels. Here, we demonstrate change on lake-water low high acid-deposition areas using infrared spectroscopic techniques ~200-year-long lake-sediment records from central Canada. We show that suppressed naturally higher during 20th century, but lakes now occurring with emissions formerly areas. In contrast, areas, forcing towards new ecological states, as often exceed

Language: Английский

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