Iron in boreal river catchments: Biogeochemical, ecological and management implications DOI Creative Commons

Katri Heikkinen,

Mika Saari, Jani Heino

et al.

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 805, P. 150256 - 150256

Published: Sept. 11, 2021

Iron (Fe) is an important element in aquatic ecosystems worldwide because it intimately tied with multiple abiotic and biotic phenomena. Here, we give a survey of manifold influences Fe, the key factors affecting boreal catchments their waters. It includes perspectives biogeochemistry, hydrology, ecology, river basin management. We emphasize views on dynamics impacts different forms Fe riverine environments, including organic colloids particles, as well inorganic fractions. also provide for land use management suggest guidelines decision making water Based our survey, main emphases protection programs should be (i) prevention mobilization from soil layers by avoiding unnecessary land-use activities minimizing disturbance high-risk areas; (ii) disconnecting Fe-rich ground discharge directly reaching watercourses; (iii) decreasing transport to watercourses applying efficient pollution control approaches. These approaches may require specific methods that given attention depending catchment conditions areas. Finally, highlight issues requiring additional research catchments. A issue increase understanding role utilization DOM food webs, which are typically highly heterotrophic. More knowledge needed metabolic behavioral resistance mechanisms organisms, such algae, invertebrates, fish, have developed counter harmful rivers naturally high concentrations. emphasized fulfil needs presented above, develop effective management, biogeochemical processes contributing via estuaries better understood.

Language: Английский

Global lake responses to climate change DOI
R. Iestyn Woolway, Benjamin M. Kraemer, John D. Lenters

et al.

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

Published: July 14, 2020

Language: Английский

Citations

1006
Ecology and extent of freshwater browning - What we know and what should be studied next in the context of global change DOI Creative Commons
Clarisse C. Blanchet, Céline Arzel, Aurélie Davranche

et al.

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 812, P. 152420 - 152420

Published: Dec. 22, 2021

Water browning or brownification refers to increasing water color, often related dissolved organic matter (DOM) and carbon (DOC) content in freshwaters. Browning has been recognized as a significant physicochemical phenomenon altering boreal lakes, but our understanding of its ecological consequences different freshwater habitats regions is limited. Here, we review the on habitats, food webs aquatic-terrestrial habitat coupling. We examine global trends DOM/DOC, use remote sensing tool investigate from local scales. Studies have focused lakes rivers while seldom addressing effects at catchment scale. Other such small temporary waterbodies overlooked, making study entire network incomplete. While past research investigated response primary producers, aquatic invertebrates fishes, macrophytes, invasive species, understudied. Research without considering fluxes between terrestrial habitats. highlight importance how changes one may cascade another. broader than heretofore concentration region. Overall, propose that future studies improve through following actions: 1) knowledge processes other wetland types rivers, 2) assessing impact multiple scales, 3) examining coupling, 4) expanding scale, 5) using consequences.

Language: Английский

Citations

72
Abruptly and irreversibly changing Arctic freshwaters urgently require standardized monitoring DOI Creative Commons
Jani Heino, Joseph M. Culp, Jaakko Erkinaro

et al.

Journal of Applied Ecology, Journal Year: 2020, Volume and Issue: 57(7), P. 1192 - 1198

Published: April 23, 2020

Abstract Arctic regions support a wide variety of freshwater ecosystems. These naturally oligotrophic and cold‐water streams, rivers, ponds lakes are currently being impacted by diverse range anthropogenic pressures, such as accelerated climate change, permafrost thaw, land‐use eutrophication, brownification the replacement northern biota with expansion more southern species. Multiple stressors rapidly changing systems aquatic habitats becoming suitable for species originating from southerly thereby threatening adapted to cold waters. The livelihoods Indigenous Peoples north will be altered when ecosystem services associated changes in biodiversity affected. Unfortunately, monitoring change freshwaters is inadequate, making it difficult, if not impossible, predict services. Synthesis applications . We propose three‐step approach better address facilitate rapid ecological that ecosystems experiencing result change. First, we should increase our efforts across all countries setting up network sites devoting effort broad‐scale baseline survey using standardized methods. Second, enhance modelling include both socio‐economic development. models help pinpoint species, geographical areas likely show abrupt response any changes. Third, interaction among scientists, policymakers different stakeholder groups. In particular, must involved leadership, planning execution assessment activities freshwaters. proposed approach, which critical detecting effects circumpolar region, has broader global coordination biomonitoring. Through routine monitoring, standardization methods, enhanced integrated scientific increased collaboration within sectors, effective management impacts on possible globally.

Language: Английский

Citations

69
Streams and riparian forests depend on each other: A review with a special focus on microbes DOI

Mari J. Tolkkinen,

Jani Heino, Saija H K Ahonen

et al.

Forest Ecology and Management, Journal Year: 2020, Volume and Issue: 462, P. 117962 - 117962

Published: Feb. 17, 2020

Language: Английский

Citations

58
The Lake Ice Continuum Concept: Influence of Winter Conditions on Energy and Ecosystem Dynamics DOI Creative Commons
Emily Cavaliere, Isabelle B. Fournier, Václava Hazuková

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2021, Volume and Issue: 126(11)

Published: Oct. 23, 2021

Abstract Millions of lakes worldwide are distributed at latitudes or elevations resulting in the formation lake ice during winter. Lake affects transfer energy, heat, light, and material between their surroundings creating an environment dramatically different from open‐water conditions. While this fundamental restructuring leads to distinct gradients ions, dissolved gases, nutrients throughout water column, surprisingly little is known about effects on ecosystem processes food webs, highlighting lack a general limnological framework that characterizes structure function under gradient cover. Drawing literature three novel case studies, we present Ice Continuum Concept (LICC) as model for understanding how key aspects physical, chemical, ecological vary along continuum winter climate conditions mediated by snow We examine differences redox, community describe they response shifts physical mixing dynamics light availability with cover, clear alone, lacking altogether. Global change driving covered toward not only warmer annual average temperatures but also reduced, intermittent no The LICC highlights wide range responses ongoing climate‐driven changes cover serves reminder need understand role aquatic cycle.

Language: Английский

Citations

47
Climate change and mercury in the Arctic: Biotic interactions DOI
Melissa A. McKinney, John Chételat, Samantha Burke

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 834, P. 155221 - 155221

Published: April 12, 2022

Language: Английский

Citations

35
Primary production and depth drive different trophic structure and functioning of fish assemblages in French marine ecosystems DOI Creative Commons
Pierre Cresson, Tiphaine Chouvelon, Paco Bustamante

et al.

Progress In Oceanography, Journal Year: 2020, Volume and Issue: 186, P. 102343 - 102343

Published: May 10, 2020

Language: Английский

Citations

43
Increasing temperature and productivity change biomass, trophic pyramids and community‐level omega‐3 fatty acid content in subarctic lake food webs DOI
Ossi Keva, Sami J. Taipale, Brian Hayden

et al.

Global Change Biology, Journal Year: 2020, Volume and Issue: 27(2), P. 282 - 296

Published: Oct. 30, 2020

Abstract Climate change in the Arctic is outpacing global average and land‐use intensifying due to exploitation of previously inaccessible or unprofitable natural resources. A comprehensive understanding how joint effects changing climate productivity modify lake food web structure, biomass, trophic pyramid shape abundance physiologically essential biomolecules (omega‐3 fatty acids) biotic community lacking. We conducted a space‐for‐time study 20 subarctic lakes spanning climatic (+3.2°C precipitation: +30%) chemical (dissolved organic carbon: +10 mg/L, total phosphorus: +45 µg/L nitrogen: +1,000 µg/L) gradient test temperature jointly affect biomass acid content (eicosapentaenoic [EPA] docosahexaenoic [DHA]) whole webs. Increasing shifted communities towards dominance warmer, murky‐water‐adapted taxa, with general increase primary producers, secondary tertiary consumers, while invertebrate consumers did not show equally clear trends. This process altered various structures an hour glass warmest most productive lakes. had negative trends (mg EPA + DHA/g dry weight) producers but nor fish consumers. The massive increment led increasing areal (kg DHA/ha) increasingly more lakes, there were no significant other levels. are shifting systems characterized by cyanobacteria cyprinid fish, although decreasing quality terms DHA was observed only phytoplankton, zooplankton profundal benthos.

Language: Английский

Citations

42
The importance of omega‐3 polyunsaturated fatty acids as high‐quality food in freshwater ecosystems with implications of global change DOI

Keheng Yan,

Fen Guo, Martin J. Kainz

et al.

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2023, Volume and Issue: 99(1), P. 200 - 218

Published: Sept. 19, 2023

ABSTRACT Traditionally, trophic ecology research on aquatic ecosystems has focused more the quantity of dietary energy flow within food webs rather than quality and its effects organisms at various levels. Recent studies emphasize that is central to consumer growth reproduction, importance for become increasingly well recognized. It timely synthesise these findings identify potential future directions. We conducted a systematic review omega‐3 polyunsaturated fatty acids (ω3‐PUFAs) as crucial component high‐quality sources in freshwater evaluate their impact variety consumers, explore global change transfer higher consumers across ecosystems. In ecosystems, algae rich ω3 long‐chain PUFAs, such diatoms, dinoflagellates cryptophytes, represent important whereas cyanobacteria, green algae, terrestrial vascular plants macrophytes low PUFAs are low‐quality sources. High‐quality ω3‐PUFA‐containing usually lead increased reproduction e.g. benthic invertebrates, zooplankton fish, also provide riparian via emergent insects. Consumers feeding foods turn own predators. However, ω3‐PUFA content sensitive environmental changes. Warming, eutrophication, light intensity (e.g. from loss shading), pollutants potentially inhibit synthesis algal ω3‐PUFAs while same time promoting lower‐quality foods, cyanobacteria algae. These factors combined could significant reduction availability constrain overall fitness. Although effect individual been investigated, multiple climate change, human activities, pollution) will act combination any synergistic remain unclear. Identifying fate an approach understand relationships implications populations consumers. Maintaining may be key mitigating biodiversity due change.

Language: Английский

Citations

15
Tipping points of nitrogen use efficiency in freshwater phytoplankton along trophic state gradient DOI
Lei Jin, Huihuang Chen, Shin‐ichiro S. Matsuzaki

et al.

Water Research, Journal Year: 2023, Volume and Issue: 245, P. 120639 - 120639

Published: Sept. 16, 2023

Language: Английский

Citations

13