Environmental controls on benthic food web functions and carbon resource use in subarctic lakes

Climate warming and consequent greening of subarctic landscapes increase the availability of organic carbon to the detrital food webs in aquatic ecosystems. This may cause important shifts in ecosystem functioning through the functional feeding patterns of benthic organisms that rely differently on...

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Published in:Freshwater Biology
Main Authors: Kivilä, E. Henriikka, Luoto, Tomi P., Rantala, Marttiina V., Kiljunen, Mikko, Rautio, Milla, Nevalainen, Liisa
Other Authors: Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2021
Subjects:
Online Access:http://hdl.handle.net/10138/326140
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spelling ftunivhelsihelda:oai:helda.helsinki.fi:10138/326140 2024-01-07T09:46:54+01:00 Environmental controls on benthic food web functions and carbon resource use in subarctic lakes Kivilä, E. Henriikka Luoto, Tomi P. Rantala, Marttiina V. Kiljunen, Mikko Rautio, Milla Nevalainen, Liisa Ecosystems and Environment Research Programme Faculty of Biological and Environmental Sciences 2021-02-08T12:27:01Z 16 application/pdf http://hdl.handle.net/10138/326140 eng eng Wiley 10.1111/fwb.13250 Doctoral Programme of Biological and Environmental Science of University of Jyvaskyla Graduate School for Doctoral Studies, Academy of Finland VIOLET Project, Grant/Award Number: 287547; Emil Aaltonen Foundation, Grant/Award Number: 160156 and 170161; Natural Sciences and Engineering Research Council of Canada Kivilä , E H , Luoto , T P , Rantala , M V , Kiljunen , M , Rautio , M & Nevalainen , L 2019 , ' Environmental controls on benthic food web functions and carbon resource use in subarctic lakes ' , Freshwater Biology , vol. 64 , no. 4 , pp. 643-658 . https://doi.org/10.1111/fwb.13250 ORCID: /0000-0001-6925-3688/work/56157947 ORCID: /0000-0002-3231-5926/work/56161915 ORCID: /0000-0001-6837-8753/work/56162386 85060028981 a71e89e8-7302-4b4f-8463-26ac186bc599 http://hdl.handle.net/10138/326140 000461212700003 openAccess info:eu-repo/semantics/openAccess Chironomidae functional ecology organic carbon paleolimnology stable isotopes TERRESTRIAL ORGANIC-MATTER STABLE-ISOTOPE RATIOS FRESH-WATER TROPHIC FRACTIONATION NITROGEN ENRICHMENT DELTA-N-15 INVERTEBRATES ZOOPLANKTON DELTA-C-13 1172 Environmental sciences 1181 Ecology evolutionary biology Article acceptedVersion 2021 ftunivhelsihelda 2023-12-14T00:11:31Z Climate warming and consequent greening of subarctic landscapes increase the availability of organic carbon to the detrital food webs in aquatic ecosystems. This may cause important shifts in ecosystem functioning through the functional feeding patterns of benthic organisms that rely differently on climatically altered carbon resources. Twenty-five subarctic lakes in Finnish Lapland across a tree line ecotone were analysed for limnological and optical variables, carbon (delta C-13) and nitrogen (delta N-15) stable isotope (SI) composition of surface sediment organic matter (OM) and fossil Chironomidae (Diptera) remains to examine environmental controls behind chironomid functional feeding group (FFG) structure and their isotopic associations for assessing ecosystem functioning and carbon utilisation. We hypothesise that the chironomid SI signatures reflect increased allochthony with increasing allochthonous input, but the resource use may be altered by the functional characteristics of the assemblage. Multivariate analyses indicated that carbon geochemistry in the sediments (delta C-13, delta N-15, C/N), nutrients, indices of productivity (chlorophyll-a) and lake water optical properties, related to increasing presence of OM, played a key role in defining the chironomid FFG composition and isotopic signatures. Response modelling was used to examine how individual FFGs respond to environmental gradients. They showed divergent responses for OM quantity, dissolved organic carbon and nutrients between feeding strategies, suggesting that detritivores and filter feeders prefer contrasting carbon and nutrient conditions, and may thus hold paleoecological indicator potential to identify changes between different carbon fluxes. Benthic production was the primary carbon source for the chironomid assemblages according to a three-source SI mixing model, whereas pelagic and terrestrial components contributed less. Between-lake variability in source utilisation was high and controlled primarily by allochthonous OM inputs. ... Article in Journal/Newspaper Subarctic Lapland HELDA – University of Helsinki Open Repository Freshwater Biology 64 4 643 658
institution Open Polar
collection HELDA – University of Helsinki Open Repository
op_collection_id ftunivhelsihelda
language English
topic Chironomidae
functional ecology
organic carbon
paleolimnology
stable isotopes
TERRESTRIAL ORGANIC-MATTER
STABLE-ISOTOPE RATIOS
FRESH-WATER
TROPHIC FRACTIONATION
NITROGEN
ENRICHMENT
DELTA-N-15
INVERTEBRATES
ZOOPLANKTON
DELTA-C-13
1172 Environmental sciences
1181 Ecology
evolutionary biology
spellingShingle Chironomidae
functional ecology
organic carbon
paleolimnology
stable isotopes
TERRESTRIAL ORGANIC-MATTER
STABLE-ISOTOPE RATIOS
FRESH-WATER
TROPHIC FRACTIONATION
NITROGEN
ENRICHMENT
DELTA-N-15
INVERTEBRATES
ZOOPLANKTON
DELTA-C-13
1172 Environmental sciences
1181 Ecology
evolutionary biology
Kivilä, E. Henriikka
Luoto, Tomi P.
Rantala, Marttiina V.
Kiljunen, Mikko
Rautio, Milla
Nevalainen, Liisa
Environmental controls on benthic food web functions and carbon resource use in subarctic lakes
topic_facet Chironomidae
functional ecology
organic carbon
paleolimnology
stable isotopes
TERRESTRIAL ORGANIC-MATTER
STABLE-ISOTOPE RATIOS
FRESH-WATER
TROPHIC FRACTIONATION
NITROGEN
ENRICHMENT
DELTA-N-15
INVERTEBRATES
ZOOPLANKTON
DELTA-C-13
1172 Environmental sciences
1181 Ecology
evolutionary biology
description Climate warming and consequent greening of subarctic landscapes increase the availability of organic carbon to the detrital food webs in aquatic ecosystems. This may cause important shifts in ecosystem functioning through the functional feeding patterns of benthic organisms that rely differently on climatically altered carbon resources. Twenty-five subarctic lakes in Finnish Lapland across a tree line ecotone were analysed for limnological and optical variables, carbon (delta C-13) and nitrogen (delta N-15) stable isotope (SI) composition of surface sediment organic matter (OM) and fossil Chironomidae (Diptera) remains to examine environmental controls behind chironomid functional feeding group (FFG) structure and their isotopic associations for assessing ecosystem functioning and carbon utilisation. We hypothesise that the chironomid SI signatures reflect increased allochthony with increasing allochthonous input, but the resource use may be altered by the functional characteristics of the assemblage. Multivariate analyses indicated that carbon geochemistry in the sediments (delta C-13, delta N-15, C/N), nutrients, indices of productivity (chlorophyll-a) and lake water optical properties, related to increasing presence of OM, played a key role in defining the chironomid FFG composition and isotopic signatures. Response modelling was used to examine how individual FFGs respond to environmental gradients. They showed divergent responses for OM quantity, dissolved organic carbon and nutrients between feeding strategies, suggesting that detritivores and filter feeders prefer contrasting carbon and nutrient conditions, and may thus hold paleoecological indicator potential to identify changes between different carbon fluxes. Benthic production was the primary carbon source for the chironomid assemblages according to a three-source SI mixing model, whereas pelagic and terrestrial components contributed less. Between-lake variability in source utilisation was high and controlled primarily by allochthonous OM inputs. ...
author2 Ecosystems and Environment Research Programme
Faculty of Biological and Environmental Sciences
format Article in Journal/Newspaper
author Kivilä, E. Henriikka
Luoto, Tomi P.
Rantala, Marttiina V.
Kiljunen, Mikko
Rautio, Milla
Nevalainen, Liisa
author_facet Kivilä, E. Henriikka
Luoto, Tomi P.
Rantala, Marttiina V.
Kiljunen, Mikko
Rautio, Milla
Nevalainen, Liisa
author_sort Kivilä, E. Henriikka
title Environmental controls on benthic food web functions and carbon resource use in subarctic lakes
title_short Environmental controls on benthic food web functions and carbon resource use in subarctic lakes
title_full Environmental controls on benthic food web functions and carbon resource use in subarctic lakes
title_fullStr Environmental controls on benthic food web functions and carbon resource use in subarctic lakes
title_full_unstemmed Environmental controls on benthic food web functions and carbon resource use in subarctic lakes
title_sort environmental controls on benthic food web functions and carbon resource use in subarctic lakes
publisher Wiley
publishDate 2021
url http://hdl.handle.net/10138/326140
genre Subarctic
Lapland
genre_facet Subarctic
Lapland
op_relation 10.1111/fwb.13250
Doctoral Programme of Biological and Environmental Science of University of Jyvaskyla Graduate School for Doctoral Studies, Academy of Finland VIOLET Project, Grant/Award Number: 287547; Emil Aaltonen Foundation, Grant/Award Number: 160156 and 170161; Natural Sciences and Engineering Research Council of Canada
Kivilä , E H , Luoto , T P , Rantala , M V , Kiljunen , M , Rautio , M & Nevalainen , L 2019 , ' Environmental controls on benthic food web functions and carbon resource use in subarctic lakes ' , Freshwater Biology , vol. 64 , no. 4 , pp. 643-658 . https://doi.org/10.1111/fwb.13250
ORCID: /0000-0001-6925-3688/work/56157947
ORCID: /0000-0002-3231-5926/work/56161915
ORCID: /0000-0001-6837-8753/work/56162386
85060028981
a71e89e8-7302-4b4f-8463-26ac186bc599
http://hdl.handle.net/10138/326140
000461212700003
op_rights openAccess
info:eu-repo/semantics/openAccess
container_title Freshwater Biology
container_volume 64
container_issue 4
container_start_page 643
op_container_end_page 658
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