Changes in the population size and demography of southern seabirds: management implications
Abstract Oceans occupy some 70 per cent of the world surface. The greater part of the northern hemisphere consists of land, while oceans represent the majority of the southern hemisphere, in a contiguous body of water known collectively as the Austral of Antarctic Ocean in its circumpolar reaches. H...
| Main Authors: | , |
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| Format: | Book Part |
| Language: | English |
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Oxford University PressOxford
1991
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| Online Access: | http://dx.doi.org/10.1093/oso/9780198577300.003.0014 https://academic.oup.com/book/chapter-pdf/52554685/isbn-9780198577300-book-part-14.pdf |
| Summary: | Abstract Oceans occupy some 70 per cent of the world surface. The greater part of the northern hemisphere consists of land, while oceans represent the majority of the southern hemisphere, in a contiguous body of water known collectively as the Austral of Antarctic Ocean in its circumpolar reaches. Here the seabird communities are the richest in the world in terms of both actual numbers and numbers of species. Despite the impact of sealing and whaling on subantarctic ecosystems, many of the islands and their avifaunas remain relatively undamaged. However, the situation is changing rapidly. With the increase of human activities, it is essential to monitor the seabird species likely to be affected, in order to identify the causes of demographic changes. When trying to explain the changes in population sizes, it is important to detect the environmental factors that could cause changes and to identify past and present human influences on seabird populations. |
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