Breeding on the leading edge of a northward range expansion: differences in morphology and the stress response in the arctic Gambel's white-crowned sparrow.
Individuals at the forefront of a range shift are likely to exhibit phenotypic traits that distinguish them from the population breeding within the historic range. Recent studies have examined morphological, physiological and behavioral phenotypes of individuals at the edge of their range. Several s...
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ftcdlib:oai:escholarship.org/ark:/13030/qt7gn1x99c 2023-05-15T15:02:17+02:00 Breeding on the leading edge of a northward range expansion: differences in morphology and the stress response in the arctic Gambel's white-crowned sparrow. Krause, Jesse S Chmura, Helen E Pérez, Jonathan H Quach, Lisa N Asmus, Ashley Word, Karen R McGuigan, Michaela A Sweet, Shannan K Meddle, Simone L Gough, Laura Boelman, Natalie Wingfield, John C 33 - 44 2016-01-01 application/pdf https://escholarship.org/uc/item/7gn1x99c unknown eScholarship, University of California qt7gn1x99c https://escholarship.org/uc/item/7gn1x99c public Oecologia, vol 180, iss 1 Pituitary-Adrenal System Hypothalamo-Hypophyseal System Animals Sparrows Corticosterone Glucocorticoids Breeding Animal Migration Homing Behavior Reproduction Phenotype Arctic Regions Female Male Cold Temperature Stress Physiological Climate Change Adrenocortical Allostatic load Hypothalamic–pituitary–adrenal axis Morphometrics Hypothalamic-pituitary-adrenal axis Ecology article 2016 ftcdlib 2020-07-01T06:41:26Z Individuals at the forefront of a range shift are likely to exhibit phenotypic traits that distinguish them from the population breeding within the historic range. Recent studies have examined morphological, physiological and behavioral phenotypes of individuals at the edge of their range. Several studies have found differences in the hypothalamic-pituitary-adrenal (HPA) axis activity in response to acute restraint stress in individuals at the range limits. HPA axis activation leads to elevations in glucocorticoids that regulate physiology and behavior. Here we compare the hormonal profiles and morphometrics from Gambel's white-crowned sparrows (Zonotrichia leucophrys gambelii) breeding at the northern limit of the population's range to those birds breeding within the historic population range. Birds breeding at the northern limit experienced a harsher environment with colder temperatures; however, we found no differences in arthropod prey biomass between the northern limit and more southern (historic) sites. Males at the northern limit had higher body condition scores (mass corrected for body size) compared to individuals within the historic range, but no differences were found in beak and tarsus lengths, wing chord, muscle profile or fat stores. In males during the pre-parental stage, before breeding commenced, HPA axis activity was elevated in birds at the northern limit of the range, but no differences were found during the parental or molt stages. Females showed no differences in HPA axis activity during the parental stage. This study suggests that "pioneering" individuals at the limits of their breeding range exhibit physiology and morphology that are distinct from individuals within the historic range. Article in Journal/Newspaper Arctic Climate change University of California: eScholarship Arctic |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Pituitary-Adrenal System Hypothalamo-Hypophyseal System Animals Sparrows Corticosterone Glucocorticoids Breeding Animal Migration Homing Behavior Reproduction Phenotype Arctic Regions Female Male Cold Temperature Stress Physiological Climate Change Adrenocortical Allostatic load Hypothalamic–pituitary–adrenal axis Morphometrics Hypothalamic-pituitary-adrenal axis Ecology |
spellingShingle |
Pituitary-Adrenal System Hypothalamo-Hypophyseal System Animals Sparrows Corticosterone Glucocorticoids Breeding Animal Migration Homing Behavior Reproduction Phenotype Arctic Regions Female Male Cold Temperature Stress Physiological Climate Change Adrenocortical Allostatic load Hypothalamic–pituitary–adrenal axis Morphometrics Hypothalamic-pituitary-adrenal axis Ecology Krause, Jesse S Chmura, Helen E Pérez, Jonathan H Quach, Lisa N Asmus, Ashley Word, Karen R McGuigan, Michaela A Sweet, Shannan K Meddle, Simone L Gough, Laura Boelman, Natalie Wingfield, John C Breeding on the leading edge of a northward range expansion: differences in morphology and the stress response in the arctic Gambel's white-crowned sparrow. |
topic_facet |
Pituitary-Adrenal System Hypothalamo-Hypophyseal System Animals Sparrows Corticosterone Glucocorticoids Breeding Animal Migration Homing Behavior Reproduction Phenotype Arctic Regions Female Male Cold Temperature Stress Physiological Climate Change Adrenocortical Allostatic load Hypothalamic–pituitary–adrenal axis Morphometrics Hypothalamic-pituitary-adrenal axis Ecology |
description |
Individuals at the forefront of a range shift are likely to exhibit phenotypic traits that distinguish them from the population breeding within the historic range. Recent studies have examined morphological, physiological and behavioral phenotypes of individuals at the edge of their range. Several studies have found differences in the hypothalamic-pituitary-adrenal (HPA) axis activity in response to acute restraint stress in individuals at the range limits. HPA axis activation leads to elevations in glucocorticoids that regulate physiology and behavior. Here we compare the hormonal profiles and morphometrics from Gambel's white-crowned sparrows (Zonotrichia leucophrys gambelii) breeding at the northern limit of the population's range to those birds breeding within the historic population range. Birds breeding at the northern limit experienced a harsher environment with colder temperatures; however, we found no differences in arthropod prey biomass between the northern limit and more southern (historic) sites. Males at the northern limit had higher body condition scores (mass corrected for body size) compared to individuals within the historic range, but no differences were found in beak and tarsus lengths, wing chord, muscle profile or fat stores. In males during the pre-parental stage, before breeding commenced, HPA axis activity was elevated in birds at the northern limit of the range, but no differences were found during the parental or molt stages. Females showed no differences in HPA axis activity during the parental stage. This study suggests that "pioneering" individuals at the limits of their breeding range exhibit physiology and morphology that are distinct from individuals within the historic range. |
format |
Article in Journal/Newspaper |
author |
Krause, Jesse S Chmura, Helen E Pérez, Jonathan H Quach, Lisa N Asmus, Ashley Word, Karen R McGuigan, Michaela A Sweet, Shannan K Meddle, Simone L Gough, Laura Boelman, Natalie Wingfield, John C |
author_facet |
Krause, Jesse S Chmura, Helen E Pérez, Jonathan H Quach, Lisa N Asmus, Ashley Word, Karen R McGuigan, Michaela A Sweet, Shannan K Meddle, Simone L Gough, Laura Boelman, Natalie Wingfield, John C |
author_sort |
Krause, Jesse S |
title |
Breeding on the leading edge of a northward range expansion: differences in morphology and the stress response in the arctic Gambel's white-crowned sparrow. |
title_short |
Breeding on the leading edge of a northward range expansion: differences in morphology and the stress response in the arctic Gambel's white-crowned sparrow. |
title_full |
Breeding on the leading edge of a northward range expansion: differences in morphology and the stress response in the arctic Gambel's white-crowned sparrow. |
title_fullStr |
Breeding on the leading edge of a northward range expansion: differences in morphology and the stress response in the arctic Gambel's white-crowned sparrow. |
title_full_unstemmed |
Breeding on the leading edge of a northward range expansion: differences in morphology and the stress response in the arctic Gambel's white-crowned sparrow. |
title_sort |
breeding on the leading edge of a northward range expansion: differences in morphology and the stress response in the arctic gambel's white-crowned sparrow. |
publisher |
eScholarship, University of California |
publishDate |
2016 |
url |
https://escholarship.org/uc/item/7gn1x99c |
op_coverage |
33 - 44 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_source |
Oecologia, vol 180, iss 1 |
op_relation |
qt7gn1x99c https://escholarship.org/uc/item/7gn1x99c |
op_rights |
public |
_version_ |
1766334242703278080 |