Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations
Abstract Seasonal variation in immune function can be attributed to life history trade-offs, and to variation in environmental conditions. However, because phenological stages and environmental conditions co-vary in temperate and arctic zones, their separate contributions have not been determined. W...
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Springer Science and Business Media LLC
2021
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Online Access: | http://dx.doi.org/10.1007/s00442-021-05052-0 https://link.springer.com/content/pdf/10.1007/s00442-021-05052-0.pdf https://link.springer.com/article/10.1007/s00442-021-05052-0/fulltext.html |
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crspringernat:10.1007/s00442-021-05052-0 2023-05-15T15:13:57+02:00 Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations Ndithia, Henry K. Matson, Kevin D. Muchai, Muchane Tieleman, B. Irene Netherlands Fellowship Programme Netherlands Organization for Scientific Research Young Academy project grant University of Groningen, the Schure-Beijerinck-Popping Fonds J.L. Dobberke foundation 2021 http://dx.doi.org/10.1007/s00442-021-05052-0 https://link.springer.com/content/pdf/10.1007/s00442-021-05052-0.pdf https://link.springer.com/article/10.1007/s00442-021-05052-0/fulltext.html en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Oecologia ISSN 0029-8549 1432-1939 Ecology, Evolution, Behavior and Systematics journal-article 2021 crspringernat https://doi.org/10.1007/s00442-021-05052-0 2021-11-02T13:41:51Z Abstract Seasonal variation in immune function can be attributed to life history trade-offs, and to variation in environmental conditions. However, because phenological stages and environmental conditions co-vary in temperate and arctic zones, their separate contributions have not been determined. We compared immune function and body mass of incubating (female only), chick-feeding (female and male), and non-breeding (female and male) red-capped larks Calandrella cinerea breeding year-round in three tropical equatorial (Kenya) environments with distinct climates. We measured four immune indices: haptoglobin, nitric oxide, agglutination, and lysis. To confirm that variation in immune function between breeding (i.e., incubating or chick-feeding) and non-breeding was not confounded by environmental conditions, we tested if rainfall, average minimum temperature ( T min ), and average maximum temperature ( T max ) differed during sampling times among the three breeding statuses per location. T min and T max differed between chick-feeding and non-breeding, suggesting that birds utilized environmental conditions differently in different locations for reproduction. Immune indices did not differ between incubating, chick-feeding and non-breeding birds in all three locations. There were two exceptions: nitric oxide was higher during incubation in cool and wet South Kinangop, and it was higher during chick-feeding in the cool and dry North Kinangop compared to non-breeding birds in these locations. For nitric oxide, agglutination, and lysis, we found among-location differences within breeding stage. In equatorial tropical birds, variation in immune function seems to be better explained by among-location climate-induced environmental conditions than by breeding status. Our findings raise questions about how within-location environmental variation relates to and affects immune function. Article in Journal/Newspaper Arctic Springer Nature (via Crossref) Arctic Oecologia 197 3 599 614 |
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Open Polar |
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Springer Nature (via Crossref) |
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crspringernat |
language |
English |
topic |
Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology, Evolution, Behavior and Systematics Ndithia, Henry K. Matson, Kevin D. Muchai, Muchane Tieleman, B. Irene Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations |
topic_facet |
Ecology, Evolution, Behavior and Systematics |
description |
Abstract Seasonal variation in immune function can be attributed to life history trade-offs, and to variation in environmental conditions. However, because phenological stages and environmental conditions co-vary in temperate and arctic zones, their separate contributions have not been determined. We compared immune function and body mass of incubating (female only), chick-feeding (female and male), and non-breeding (female and male) red-capped larks Calandrella cinerea breeding year-round in three tropical equatorial (Kenya) environments with distinct climates. We measured four immune indices: haptoglobin, nitric oxide, agglutination, and lysis. To confirm that variation in immune function between breeding (i.e., incubating or chick-feeding) and non-breeding was not confounded by environmental conditions, we tested if rainfall, average minimum temperature ( T min ), and average maximum temperature ( T max ) differed during sampling times among the three breeding statuses per location. T min and T max differed between chick-feeding and non-breeding, suggesting that birds utilized environmental conditions differently in different locations for reproduction. Immune indices did not differ between incubating, chick-feeding and non-breeding birds in all three locations. There were two exceptions: nitric oxide was higher during incubation in cool and wet South Kinangop, and it was higher during chick-feeding in the cool and dry North Kinangop compared to non-breeding birds in these locations. For nitric oxide, agglutination, and lysis, we found among-location differences within breeding stage. In equatorial tropical birds, variation in immune function seems to be better explained by among-location climate-induced environmental conditions than by breeding status. Our findings raise questions about how within-location environmental variation relates to and affects immune function. |
author2 |
Netherlands Fellowship Programme Netherlands Organization for Scientific Research Young Academy project grant University of Groningen, the Schure-Beijerinck-Popping Fonds J.L. Dobberke foundation |
format |
Article in Journal/Newspaper |
author |
Ndithia, Henry K. Matson, Kevin D. Muchai, Muchane Tieleman, B. Irene |
author_facet |
Ndithia, Henry K. Matson, Kevin D. Muchai, Muchane Tieleman, B. Irene |
author_sort |
Ndithia, Henry K. |
title |
Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations |
title_short |
Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations |
title_full |
Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations |
title_fullStr |
Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations |
title_full_unstemmed |
Immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations |
title_sort |
immune function differs among tropical environments but is not downregulated during reproduction in three year-round breeding equatorial lark populations |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1007/s00442-021-05052-0 https://link.springer.com/content/pdf/10.1007/s00442-021-05052-0.pdf https://link.springer.com/article/10.1007/s00442-021-05052-0/fulltext.html |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Oecologia ISSN 0029-8549 1432-1939 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s00442-021-05052-0 |
container_title |
Oecologia |
container_volume |
197 |
container_issue |
3 |
container_start_page |
599 |
op_container_end_page |
614 |
_version_ |
1766344462914551808 |