Food webs patterns in species-poor insular lakes resemble climate-related patterns in continental lakes
Space-for-time substitution studies (SFTS, e.g. latitudinal gradient analyses) are often used to unravel climate effects on lake biota, and have shown a reduction in size, changes in diet and more frequent reproduction of fish in warmer climates, with cascading effects such as lower zooplankton and...
Main Authors: | , , , , , , , , , , , , |
---|---|
Format: | Report |
Language: | English |
Published: |
2015
|
Subjects: | |
Online Access: | https://pure.au.dk/portal/da/publications/food-webs-patterns-in-speciespoor-insular-lakes-resemble-climaterelated-patterns-in-continental-lakes(074b99ef-4b02-4cf1-9313-6258d1339c69).html |
id |
ftuniaarhuspubl:oai:pure.atira.dk:publications/074b99ef-4b02-4cf1-9313-6258d1339c69 |
---|---|
record_format |
openpolar |
spelling |
ftuniaarhuspubl:oai:pure.atira.dk:publications/074b99ef-4b02-4cf1-9313-6258d1339c69 2023-05-15T16:10:58+02:00 Food webs patterns in species-poor insular lakes resemble climate-related patterns in continental lakes Vidal, Nicolas Amsinck, Susanne Lildal Goncalves, Vitor Azevedo, José Manuel Neto Johansson, Liselotte Sander Christoffersen, Kirsten Seestern Lauridsen, Torben Linding Søndergaard, Martin Bjerring, Rikke Landkildehus, Frank Brodersen, Klaus P. Meerhoff, Mariana Jeppesen, Erik 2015 https://pure.au.dk/portal/da/publications/food-webs-patterns-in-speciespoor-insular-lakes-resemble-climaterelated-patterns-in-continental-lakes(074b99ef-4b02-4cf1-9313-6258d1339c69).html eng eng info:eu-repo/semantics/restrictedAccess Vidal , N , Amsinck , S L , Goncalves , V , Azevedo , J M N , Johansson , L S , Christoffersen , K S , Lauridsen , T L , Søndergaard , M , Bjerring , R , Landkildehus , F , Brodersen , K P , Meerhoff , M & Jeppesen , E 2015 ' Food webs patterns in species-poor insular lakes resemble climate-related patterns in continental lakes ' . workingPaper 2015 ftuniaarhuspubl 2022-11-30T23:54:34Z Space-for-time substitution studies (SFTS, e.g. latitudinal gradient analyses) are often used to unravel climate effects on lake biota, and have shown a reduction in size, changes in diet and more frequent reproduction of fish in warmer climates, with cascading effects such as lower zooplankton and higher phytoplankton biomasses. SFTS results from continental lakes are, however, potentially confounded by biogeographical and evolutionary differences leading to often higher species richness in warm lakes. To somehow reduce these confounding effects, we studied species-poor lakes located in two remote island groups with contrasting climates but similar seasonality: The Faroe Islands (cold; 6.5±2.8°C) and the Azores (warm; 17.3±2.9°C). We analysed community and food web structure using a stable isotopes approach investigating fish, macro-invertebrates, and zooplankton in 20 lakes. We found a smaller mean body size of fish in the Azorean lakes even if standardised by maximum length of the fish species present, suggesting a higher predation pressure on zooplankton and consequently higher phytoplankton abundance at the same nutrient levels. A triangular shape of the food web, with wider carbon range for basal organisms and for the whole food web appeared in the colder lakes. In contrast to previous works, though, Layman metrics of the fish food web were similar between the two climatic regions despite differences in basal organisms. Our results from insular systems showed a reduced fish body size structure in the warmer region and suggest that temperature differences may drive the changes in fish size structure. Report Faroe Islands Aarhus University: Research Faroe Islands |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
description |
Space-for-time substitution studies (SFTS, e.g. latitudinal gradient analyses) are often used to unravel climate effects on lake biota, and have shown a reduction in size, changes in diet and more frequent reproduction of fish in warmer climates, with cascading effects such as lower zooplankton and higher phytoplankton biomasses. SFTS results from continental lakes are, however, potentially confounded by biogeographical and evolutionary differences leading to often higher species richness in warm lakes. To somehow reduce these confounding effects, we studied species-poor lakes located in two remote island groups with contrasting climates but similar seasonality: The Faroe Islands (cold; 6.5±2.8°C) and the Azores (warm; 17.3±2.9°C). We analysed community and food web structure using a stable isotopes approach investigating fish, macro-invertebrates, and zooplankton in 20 lakes. We found a smaller mean body size of fish in the Azorean lakes even if standardised by maximum length of the fish species present, suggesting a higher predation pressure on zooplankton and consequently higher phytoplankton abundance at the same nutrient levels. A triangular shape of the food web, with wider carbon range for basal organisms and for the whole food web appeared in the colder lakes. In contrast to previous works, though, Layman metrics of the fish food web were similar between the two climatic regions despite differences in basal organisms. Our results from insular systems showed a reduced fish body size structure in the warmer region and suggest that temperature differences may drive the changes in fish size structure. |
format |
Report |
author |
Vidal, Nicolas Amsinck, Susanne Lildal Goncalves, Vitor Azevedo, José Manuel Neto Johansson, Liselotte Sander Christoffersen, Kirsten Seestern Lauridsen, Torben Linding Søndergaard, Martin Bjerring, Rikke Landkildehus, Frank Brodersen, Klaus P. Meerhoff, Mariana Jeppesen, Erik |
spellingShingle |
Vidal, Nicolas Amsinck, Susanne Lildal Goncalves, Vitor Azevedo, José Manuel Neto Johansson, Liselotte Sander Christoffersen, Kirsten Seestern Lauridsen, Torben Linding Søndergaard, Martin Bjerring, Rikke Landkildehus, Frank Brodersen, Klaus P. Meerhoff, Mariana Jeppesen, Erik Food webs patterns in species-poor insular lakes resemble climate-related patterns in continental lakes |
author_facet |
Vidal, Nicolas Amsinck, Susanne Lildal Goncalves, Vitor Azevedo, José Manuel Neto Johansson, Liselotte Sander Christoffersen, Kirsten Seestern Lauridsen, Torben Linding Søndergaard, Martin Bjerring, Rikke Landkildehus, Frank Brodersen, Klaus P. Meerhoff, Mariana Jeppesen, Erik |
author_sort |
Vidal, Nicolas |
title |
Food webs patterns in species-poor insular lakes resemble climate-related patterns in continental lakes |
title_short |
Food webs patterns in species-poor insular lakes resemble climate-related patterns in continental lakes |
title_full |
Food webs patterns in species-poor insular lakes resemble climate-related patterns in continental lakes |
title_fullStr |
Food webs patterns in species-poor insular lakes resemble climate-related patterns in continental lakes |
title_full_unstemmed |
Food webs patterns in species-poor insular lakes resemble climate-related patterns in continental lakes |
title_sort |
food webs patterns in species-poor insular lakes resemble climate-related patterns in continental lakes |
publishDate |
2015 |
url |
https://pure.au.dk/portal/da/publications/food-webs-patterns-in-speciespoor-insular-lakes-resemble-climaterelated-patterns-in-continental-lakes(074b99ef-4b02-4cf1-9313-6258d1339c69).html |
geographic |
Faroe Islands |
geographic_facet |
Faroe Islands |
genre |
Faroe Islands |
genre_facet |
Faroe Islands |
op_source |
Vidal , N , Amsinck , S L , Goncalves , V , Azevedo , J M N , Johansson , L S , Christoffersen , K S , Lauridsen , T L , Søndergaard , M , Bjerring , R , Landkildehus , F , Brodersen , K P , Meerhoff , M & Jeppesen , E 2015 ' Food webs patterns in species-poor insular lakes resemble climate-related patterns in continental lakes ' . |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1765996092367831040 |