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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ftjyvaeskylaenun:oai:jyx.jyu.fi:123456789/72733 2024-02-04T10:04:50+01:00 Environmental controls on benthic food web functions and carbon resource use in subarctic lakes Kivilä, Henriikka Luoto, Tomi P. Rantala, Marttiina V. Kiljunen, Mikko Rautio, Milla Nevalainen, Liisa 2019 application/pdf 643-658 fulltext http://urn.fi/URN:NBN:fi:jyu-202011066549 eng eng Wiley-Blackwell Publishing Ltd. Freshwater Biology 0046-5070 4 64 10.1111/fwb.13250 Kivilä, 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 , 64 (4), 643-658. https://doi.org/10.1111/fwb.13250 CONVID_28866885 TUTKAID_80355 URN:NBN:fi:jyu-202011066549 http://urn.fi/URN:NBN:fi:jyu-202011066549 In Copyright © 2019 John Wiley & Sons Ltd openAccess http://rightsstatements.org/page/InC/1.0/?language=en functional ecology organic carbon paleolimnology stable isotopes paleolimnologia ravintoverkot hiilen kierto liuennut orgaaninen hiili surviaissääsket article http://purl.org/eprint/type/JournalArticle http://purl.org/coar/resource_type/c_2df8fbb1 acceptedVersion A1 2019 ftjyvaeskylaenun 2024-01-11T00:02:29Z 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 (δ13C) and nitrogen (δ15N) 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 (δ13C, δ15N, 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. Combination of ... Article in Journal/Newspaper Subarctic Lapland JYX - Jyväskylä University Digital Archive |
institution |
Open Polar |
collection |
JYX - Jyväskylä University Digital Archive |
op_collection_id |
ftjyvaeskylaenun |
language |
English |
topic |
functional ecology organic carbon paleolimnology stable isotopes paleolimnologia ravintoverkot hiilen kierto liuennut orgaaninen hiili surviaissääsket |
spellingShingle |
functional ecology organic carbon paleolimnology stable isotopes paleolimnologia ravintoverkot hiilen kierto liuennut orgaaninen hiili surviaissääsket Kivilä, 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 |
functional ecology organic carbon paleolimnology stable isotopes paleolimnologia ravintoverkot hiilen kierto liuennut orgaaninen hiili surviaissääsket |
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 (δ13C) and nitrogen (δ15N) 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 (δ13C, δ15N, 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. Combination of ... |
format |
Article in Journal/Newspaper |
author |
Kivilä, Henriikka Luoto, Tomi P. Rantala, Marttiina V. Kiljunen, Mikko Rautio, Milla Nevalainen, Liisa |
author_facet |
Kivilä, Henriikka Luoto, Tomi P. Rantala, Marttiina V. Kiljunen, Mikko Rautio, Milla Nevalainen, Liisa |
author_sort |
Kivilä, 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-Blackwell Publishing Ltd. |
publishDate |
2019 |
url |
http://urn.fi/URN:NBN:fi:jyu-202011066549 |
genre |
Subarctic Lapland |
genre_facet |
Subarctic Lapland |
op_relation |
Freshwater Biology 0046-5070 4 64 10.1111/fwb.13250 Kivilä, 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 , 64 (4), 643-658. https://doi.org/10.1111/fwb.13250 CONVID_28866885 TUTKAID_80355 URN:NBN:fi:jyu-202011066549 http://urn.fi/URN:NBN:fi:jyu-202011066549 |
op_rights |
In Copyright © 2019 John Wiley & Sons Ltd openAccess http://rightsstatements.org/page/InC/1.0/?language=en |
_version_ |
1789973583465807872 |