Responses to global change in a river passerine

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dc.contributor.advisor O'Halloran, John en
dc.contributor.advisor Quinn, John en Fernández-Bellon, Darío 2019-01-17T11:54:04Z 2018 2018
dc.identifier.citation Fernández-Bellon, D. 2018. Responses to global change in a river passerine. PhD Thesis, University College Cork. en
dc.identifier.endpage 123 en
dc.description.abstract Human-induced environmental change is affecting biodiversity across the world. River systems and species associated with these habtitats are particularly vulnerable to the different drivers of global change (e.g. land use, climate change, pollution). Understanding how species respond to these drivers is key for any attempts to address and minimise the effects of global change. In this thesis I focus on a river passerine, the white-throated dipper Cinclus cinclus, as a model to assess the effects of two of the main drivers affecting river ecosystems (land use and climate change) on different ecological traits across multiple scales and life stages. Breeding phenology (Chapter 2) was influenced by climate and land use at different scales, but the interactive effect of climate and land use was significant only at local scales. Lay dates were advanced for nests in areas dominated by farmland and under conditions of increased rainfall and warmer temperatures. Land use also affected stress hormones in developing nestlings (Chapter 3): higher forest cover in the riparian area was linked to lower nestling stress hormone levels but had no apparent effect on morphological traits traditionally associated with nestling development. This land use signal on stress hormones however, was no longer evident in later life (Chapter 4), when stress hormone variation had a strong year component, likely due to weather patterns. Climate also appeared to be associated with long-term morphological change (Chapter 5). Female and male dippers experienced a relative shortening of the wing in relation to body size, reducing dimorphism between the sexes during a period concurrent with increased magnitude and fluctuations in river flow conditions. Overall, these findings suggest that dippers are adjusting their phenology, physiology and morphology in response to global change. However, adjustments in one trait may have adverse consequences for other traits. This thesis highlights the value of using multiple approaches to understand how species respond to global change, and the importance of considering multiple drivers of environmental change. en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher University College Cork en
dc.rights © 2018, Darío Fernández-Bellon. en
dc.rights.uri en
dc.subject Cinclus cinclus en
dc.subject Breeding phenology en
dc.subject Climate change en
dc.subject Global change en
dc.subject Land use en
dc.subject Lay date en
dc.subject Sliding windows en
dc.subject Spatial scale en
dc.subject Temporal scale en
dc.subject White-throated dipper en
dc.subject Biometrics en
dc.subject Feather corticosterone en
dc.subject Glucocorticoids en
dc.subject Nestling mass en
dc.subject Stress hormones en
dc.subject Morphology en
dc.subject Phenotypic change en
dc.title Responses to global change in a river passerine en
dc.type Doctoral thesis en
dc.type.qualificationlevel Doctoral en
dc.type.qualificationname PhD en
dc.internal.availability Full text not available en Restricted to everyone for three years en 2022-01-16T11:54:04Z
dc.description.version Accepted Version
dc.contributor.funder University College Cork en
dc.description.status Not peer reviewed en Biological, Earth and Environmental Sciences en
dc.check.reason This thesis is due for publication or the author is actively seeking to publish this material en
dc.check.opt-out Not applicable en
dc.thesis.opt-out false
dc.check.entireThesis Entire Thesis Restricted
dc.check.embargoformat Apply the embargo to the e-thesis on CORA (If you have submitted an e-thesis and want to embargo it on CORA) en
dc.internal.conferring Spring 2019 en

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© 2018, Darío Fernández-Bellon. Except where otherwise noted, this item's license is described as © 2018, Darío Fernández-Bellon.
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