Disentangling the drivers of decadal body size decline in an insect population
Abstract While climate warming is widely predicted to reduce body size of ectotherms, evidence for this trend is mixed. Body size depends not only on temperature but also on other factors, such as food quality and intraspecific competition. Because temperature trends or other long‐term environmental...
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Online Access: | http://dx.doi.org/10.1111/gcb.17014 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.17014 |
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crwiley:10.1111/gcb.17014 2024-06-02T08:09:21+00:00 Disentangling the drivers of decadal body size decline in an insect population Botsch, Jamieson C. Zaveri, Aayush N. Nell, Lucas A. McCormick, Amanda R. Book, K. Riley Phillips, Joseph S. Einarsson, Árni Ives, Anthony R. Division of Environmental Biology 2023 http://dx.doi.org/10.1111/gcb.17014 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.17014 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Global Change Biology volume 30, issue 1 ISSN 1354-1013 1365-2486 journal-article 2023 crwiley https://doi.org/10.1111/gcb.17014 2024-05-03T11:19:43Z Abstract While climate warming is widely predicted to reduce body size of ectotherms, evidence for this trend is mixed. Body size depends not only on temperature but also on other factors, such as food quality and intraspecific competition. Because temperature trends or other long‐term environmental factors may affect population size and food sources, attributing trends in average body size to temperature requires the separation of potentially confounding effects. We evaluated trends in the body size of the midge Tanytarsus gracilentus and potential drivers (water temperature, population size, and food quality) between 1977 and 2015 at Lake Mývatn, Iceland. Although temperatures increased at Mývatn over this period, there was only a slight (non‐significant) decrease in midge adult body size, contrary to theoretical expectations. Using a state‐space model including multiple predictors, body size was negatively associated with both water temperature and midge population abundance, and it was positively associated with 13 C enrichment of midges (an indicator of favorable food conditions). The magnitude of these effects were similar, such that simultaneous changes in temperature, abundance, and carbon stable isotopic signature could counteract each other in the long‐term body size trend. Our results illustrate how multiple factors, all of which could be influenced by global change, interact to affect average ectotherm body size. Article in Journal/Newspaper Iceland Mývatn Wiley Online Library Mývatn ENVELOPE(-16.985,-16.985,65.600,65.600) Global Change Biology 30 1 |
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Wiley Online Library |
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English |
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Abstract While climate warming is widely predicted to reduce body size of ectotherms, evidence for this trend is mixed. Body size depends not only on temperature but also on other factors, such as food quality and intraspecific competition. Because temperature trends or other long‐term environmental factors may affect population size and food sources, attributing trends in average body size to temperature requires the separation of potentially confounding effects. We evaluated trends in the body size of the midge Tanytarsus gracilentus and potential drivers (water temperature, population size, and food quality) between 1977 and 2015 at Lake Mývatn, Iceland. Although temperatures increased at Mývatn over this period, there was only a slight (non‐significant) decrease in midge adult body size, contrary to theoretical expectations. Using a state‐space model including multiple predictors, body size was negatively associated with both water temperature and midge population abundance, and it was positively associated with 13 C enrichment of midges (an indicator of favorable food conditions). The magnitude of these effects were similar, such that simultaneous changes in temperature, abundance, and carbon stable isotopic signature could counteract each other in the long‐term body size trend. Our results illustrate how multiple factors, all of which could be influenced by global change, interact to affect average ectotherm body size. |
author2 |
Division of Environmental Biology |
format |
Article in Journal/Newspaper |
author |
Botsch, Jamieson C. Zaveri, Aayush N. Nell, Lucas A. McCormick, Amanda R. Book, K. Riley Phillips, Joseph S. Einarsson, Árni Ives, Anthony R. |
spellingShingle |
Botsch, Jamieson C. Zaveri, Aayush N. Nell, Lucas A. McCormick, Amanda R. Book, K. Riley Phillips, Joseph S. Einarsson, Árni Ives, Anthony R. Disentangling the drivers of decadal body size decline in an insect population |
author_facet |
Botsch, Jamieson C. Zaveri, Aayush N. Nell, Lucas A. McCormick, Amanda R. Book, K. Riley Phillips, Joseph S. Einarsson, Árni Ives, Anthony R. |
author_sort |
Botsch, Jamieson C. |
title |
Disentangling the drivers of decadal body size decline in an insect population |
title_short |
Disentangling the drivers of decadal body size decline in an insect population |
title_full |
Disentangling the drivers of decadal body size decline in an insect population |
title_fullStr |
Disentangling the drivers of decadal body size decline in an insect population |
title_full_unstemmed |
Disentangling the drivers of decadal body size decline in an insect population |
title_sort |
disentangling the drivers of decadal body size decline in an insect population |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/gcb.17014 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.17014 |
long_lat |
ENVELOPE(-16.985,-16.985,65.600,65.600) |
geographic |
Mývatn |
geographic_facet |
Mývatn |
genre |
Iceland Mývatn |
genre_facet |
Iceland Mývatn |
op_source |
Global Change Biology volume 30, issue 1 ISSN 1354-1013 1365-2486 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/gcb.17014 |
container_title |
Global Change Biology |
container_volume |
30 |
container_issue |
1 |
_version_ |
1800755044848500736 |