Changes in water quality related to permafrost thaw may significantly impact zooplankton in small Arctic lakes

Ecological Applications, Journal Year: 2020, Volume and Issue: 30(8)

Published: May 28, 2020

Rising temperatures are leading to permafrost thaw over vast areas of the northern hemisphere. In Canadian Arctic, degradation is causing significant changes in surface water quality due release solutes that can alter conductivity, clarity, and nutrient levels. For this study, we examined how associated with might impact zooplankton, a group organisms play an important role food web Arctic lakes. We conducted biological survey 37 lakes Mackenzie Delta region Canada's Northwest Territories. then used data set develop models linking variation abundance, diversity, evenness zooplankton communities physicochemical, biological, spatial variables. Subsequently, these predict respond as altered by thaw. Our explained 47%, 68%, 69% evenness, respectively. Importantly, most parsimonious always included variables affected thaw, such calcium conductivity. Predictions based on our suggest increases abundance (1.6-3.6 fold) decreases diversity (1.2-1.7 (1.1-1.4 response These line those described for perturbations eutrophication, acidification, introduction exotic species spiny flea (Bythotrephes). Given their aquatic webs, expect will have ramifications at higher (fish) lower (phytoplankton) trophic positions

Language: Английский

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Zooplankton taxonomic and functional structure is determined by macrophytes and fish predation in a Neotropical river

Hydrobiologia, Journal Year: 2021, Volume and Issue: 848(7), P. 1475 - 1490

Published: March 1, 2021

Language: Английский

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Copepod functional traits and groups show divergent biogeographies in the global ocean

Journal of Biogeography, Journal Year: 2022, Volume and Issue: 50(1), P. 8 - 22

Published: Oct. 19, 2022

Abstract Aim The distribution of zooplankton functional traits is a key factor for regulating food web dynamics and carbon cycling in the oceans. Yet, we lack clear understanding how many groups (FGs) exist their are distributed on global scale. Here, model map environmental habitats copepod (i.e. main component marine zooplankton) FGs to identify regions sharing similar trait expression at community level. Taxon Marine planktonic Neocopepoda. Location Global ocean. Methods Factor analysis mixed data hierarchical clustering were used based five species‐level traits. An ensemble species models was estimate niches modelled weighted mean (CWM) values studied. Ocean defined community‐level using principal clustering. Results Eleven copepods identified. They displayed contrasting latitudinal patterns annual habitat suitability that could be explained by differences niche preferences: two associated with polar conditions, one followed temperature gradient, tropical oligotrophic gyres remaining three boundary currents counter currents. Four varying CWM emerged: Southern Ocean, northern southern high latitudes, upwelling systems. Conclusions present will improve representation ecosystem models. This study improves drivers biogeography serve as basis studying links between biodiversity functioning context climate change.

Language: Английский

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Contribution of freshwater metazooplankton to aquatic ecosystem services: an overview

Hydrobiologia, Journal Year: 2022, Volume and Issue: 850(12-13), P. 2795 - 2810

Published: Sept. 23, 2022

Abstract Although its role in the functioning of aquatic systems is widely recognized, contribution freshwater metazooplankton (metazoan plankton) to ecosystem services (ES) seldom considered. Here we aim at providing a first overview how this group contributes according Millennium Ecosystem Assessment framework. We show that although hardly generates any provisioning services, it provides crucial support generation other services. Metazooplankton important for fisheries because forms an essential food item larval and juvenile stages most fish acts as trophic link between phytoplankton microbial communities community. Through stoichiometric homeostasis ability feed on biochemically complementary sources may also act buffer against bottom-up effects nutrient deficiencies primary producers. often has regulatory function by controlling growth dissolved organic carbon, contributing quality drinking irrigation water supplies underwater light climate. It attractive study material didactic purposes some taxa have served model considerably aided progress scientific disciplines, such ecology, evolutionary biology, ecotoxicology, environmental, biomedical sciences.

Language: Английский

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Mesozooplankton community structure and trophic relationships in an austral high-latitude ecosystem (Beagle Channel): The role of bottom-up and top-down forces during springtime

Journal of Marine Systems, Journal Year: 2023, Volume and Issue: 240, P. 103881 - 103881

Published: March 14, 2023

Language: Английский

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