Multi-trophic level responses to environmental stressors over the past ~150 years: Insights from a lake-rich region of the world

Multiple stressors affect water quality and biodiversity in lakes worldwide. However, our understanding of which combinations of stressors are of greatest impact and how lakes have shifted from their pre-industrial baselines is fragmented. Questions remain regarding how multiple trophic groups are a...

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Autores principales:	Katherine Griffiths, Adam Jeziorski, Cindy Paquette, Zofia E. Taranu, Alexandre Baud, Dermot Antoniades, Beatrix Beisner, Paul B. Hamilton, John P. Smol, Irene Gregory-Eaves
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Beta-diversity Paleolimnology Diatoms Chironomids Cladocerans Canada Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/7ab74b03aab34890be6337bfac5215a0
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spelling	oai:doaj.org-article:7ab74b03aab34890be6337bfac5215a02021-12-01T04:51:40ZMulti-trophic level responses to environmental stressors over the past ~150 years: Insights from a lake-rich region of the world1470-160X10.1016/j.ecolind.2021.107700https://doaj.org/article/7ab74b03aab34890be6337bfac5215a02021-08-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21003654https://doaj.org/toc/1470-160XMultiple stressors affect water quality and biodiversity in lakes worldwide. However, our understanding of which combinations of stressors are of greatest impact and how lakes have shifted from their pre-industrial baselines is fragmented. Questions remain regarding how multiple trophic groups are affected by global change stressors and whether region-specific differences need to be considered. Here, we apply multiple factor analyses together with latent variable modeling to quantify potential interactions within and among taxa that span multiple trophic levels (i.e. diatoms, cladocerans and chironomids) to improve our understanding of paleo-environmental dynamics from a suite of Canadian lakes spanning four ecozones: the Boreal Shield, the Mixedwood Plains, the Atlantic Highlands, and the Atlantic Maritimes. Across all ecozones, multi-trophic assemblages were distinguished in a multiple factor analysis along a land-use gradient, with mesotrophic/eutrophic diatoms and profundal chironomids tolerant of low bottom-water oxygen concentrations recorded in more disturbed sites. Functional units across three indicator groups formed distinct networks of co-responses to key environmental and land-use gradients, although cladocerans seemed to be driven by additional (i.e., residual) gradients. Applying a temporal beta-diversity approach between modern and pre-industrial assemblages, we detected significantly greater turnover of diatom functional groups in high versus low human impact sites (p = 0.03, n = 57), with similar but non-significant trends apparent with the chironomid and cladoceran groups. Ecozonal differences in temporal turnover were also evident in diatom (p = 0.003, n = 57) and chironomid functional groups (p = 0.04, n = 41). The ecozonal differences may be partially due to differential sensitivities of the pre-industrial assemblages and may also be driven by historical disturbances. Our work highlights how the magnitude and direction of ecological change vary across ecozones and can modify responses to human impacts, with a general trend of higher species turnover in sites with greater human disturbance.Katherine GriffithsAdam JeziorskiCindy PaquetteZofia E. TaranuAlexandre BaudDermot AntoniadesBeatrix BeisnerPaul B. HamiltonJohn P. SmolIrene Gregory-EavesElsevierarticleBeta-diversityPaleolimnologyDiatomsChironomidsCladoceransCanadaEcologyQH540-549.5ENEcological Indicators, Vol 127, Iss , Pp 107700- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Beta-diversity Paleolimnology Diatoms Chironomids Cladocerans Canada Ecology QH540-549.5
spellingShingle	Beta-diversity Paleolimnology Diatoms Chironomids Cladocerans Canada Ecology QH540-549.5 Katherine Griffiths Adam Jeziorski Cindy Paquette Zofia E. Taranu Alexandre Baud Dermot Antoniades Beatrix Beisner Paul B. Hamilton John P. Smol Irene Gregory-Eaves Multi-trophic level responses to environmental stressors over the past ~150 years: Insights from a lake-rich region of the world
description	Multiple stressors affect water quality and biodiversity in lakes worldwide. However, our understanding of which combinations of stressors are of greatest impact and how lakes have shifted from their pre-industrial baselines is fragmented. Questions remain regarding how multiple trophic groups are affected by global change stressors and whether region-specific differences need to be considered. Here, we apply multiple factor analyses together with latent variable modeling to quantify potential interactions within and among taxa that span multiple trophic levels (i.e. diatoms, cladocerans and chironomids) to improve our understanding of paleo-environmental dynamics from a suite of Canadian lakes spanning four ecozones: the Boreal Shield, the Mixedwood Plains, the Atlantic Highlands, and the Atlantic Maritimes. Across all ecozones, multi-trophic assemblages were distinguished in a multiple factor analysis along a land-use gradient, with mesotrophic/eutrophic diatoms and profundal chironomids tolerant of low bottom-water oxygen concentrations recorded in more disturbed sites. Functional units across three indicator groups formed distinct networks of co-responses to key environmental and land-use gradients, although cladocerans seemed to be driven by additional (i.e., residual) gradients. Applying a temporal beta-diversity approach between modern and pre-industrial assemblages, we detected significantly greater turnover of diatom functional groups in high versus low human impact sites (p = 0.03, n = 57), with similar but non-significant trends apparent with the chironomid and cladoceran groups. Ecozonal differences in temporal turnover were also evident in diatom (p = 0.003, n = 57) and chironomid functional groups (p = 0.04, n = 41). The ecozonal differences may be partially due to differential sensitivities of the pre-industrial assemblages and may also be driven by historical disturbances. Our work highlights how the magnitude and direction of ecological change vary across ecozones and can modify responses to human impacts, with a general trend of higher species turnover in sites with greater human disturbance.
format	article
author	Katherine Griffiths Adam Jeziorski Cindy Paquette Zofia E. Taranu Alexandre Baud Dermot Antoniades Beatrix Beisner Paul B. Hamilton John P. Smol Irene Gregory-Eaves
author_facet	Katherine Griffiths Adam Jeziorski Cindy Paquette Zofia E. Taranu Alexandre Baud Dermot Antoniades Beatrix Beisner Paul B. Hamilton John P. Smol Irene Gregory-Eaves
author_sort	Katherine Griffiths
title	Multi-trophic level responses to environmental stressors over the past ~150 years: Insights from a lake-rich region of the world
title_short	Multi-trophic level responses to environmental stressors over the past ~150 years: Insights from a lake-rich region of the world
title_full	Multi-trophic level responses to environmental stressors over the past ~150 years: Insights from a lake-rich region of the world
title_fullStr	Multi-trophic level responses to environmental stressors over the past ~150 years: Insights from a lake-rich region of the world
title_full_unstemmed	Multi-trophic level responses to environmental stressors over the past ~150 years: Insights from a lake-rich region of the world
title_sort	multi-trophic level responses to environmental stressors over the past ~150 years: insights from a lake-rich region of the world
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/7ab74b03aab34890be6337bfac5215a0
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Multi-trophic level responses to environmental stressors over the past ~150 years: Insights from a lake-rich region of the world

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