The depth of Sooty Shearwater Ardenna grisea burrows varies with habitat and increases with competition for space
| Autor: | Ewan D. Wakefield, Letizia Campioni, Paulo Catry, T. J. Clark, Anne-Sophie Bonnet-Lebrun |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
biology Ecology Petrel Burrow biology.organism_classification 010603 evolutionary biology 01 natural sciences 010605 ornithology Predation Habitat Poa flabellata biology.animal Animal Science and Zoology Ardenna grisea Seabird Sooty shearwater Ecology Evolution Behavior and Systematics |
| Zdroj: | Ibis. 161:192-197 |
| ISSN: | 0019-1019 |
| DOI: | 10.1111/ibi.12631 |
| Popis: | The Sooty Shearwater Ardenna grisea, an abundant but declining petrel, is one of many seabird species that construct breeding burrows, presumably because these confer protection from predators and the elements. Little is known about the causes of variation in Sooty Shearwater burrow architecture, which can differ markedly both within and between breeding sites. We hypothesize that burrow architecture varies in response to habitat type and competition for space. To address these hypotheses, we recorded Sooty Shearwater burrow dimensions on Kidney Island, the largest Sooty Shearwater colony in the Falkland Islands, South Atlantic, and modelled these as functions of burrow density (a proxy for competition) and habitat indices. Our models suggest that Sooty Shearwaters burrow further underground in response to competition for breeding space, and that soil underlying dense tussac grass Poa flabellata is more easily excavated than other substrates, indicating how vegetation restoration could aid the conservation of this species. |
| Databáze: | OpenAIRE |
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