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首页> 外文期刊>Polar biology >Changes and consistencies in marine and coastal bird numbers on Kidney Island (Falkland Islands) over half a century
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Changes and consistencies in marine and coastal bird numbers on Kidney Island (Falkland Islands) over half a century

机译：半个多世纪以来，肾脏岛（福克兰群岛）海洋和沿海鸟类数量的变化和一致性

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摘要

Detecting change is necessary for effective ecosystem management, yet temporal data on key ecosystem components are lacking for many polar and subpolar regions. For example, although the Falkland Islands hosts internationally important marine and coastal bird populations, few of these were surveyed until the late twentieth century. The avifauna of one small island, Kidney Island, was surveyed between 1958 and 1963, however. This typical tussac-covered island has remained free of non-native predators, so changes in its avifauna may reflect variation in the wider marine environment. In order to obtain a rare snapshot of such changes, we re-surveyed Kidney Island's avifauna between 2017 and 2019, counting either individuals, breeding pairs or nest sites of marine and coastal waterbirds. Waterfowl, waders and cormorant populations were broadly stable, but several populations showed profound differences over the six decades between surveys. In particular, Southern Rockhopper penguins Eudyptes chrysocome collapsed from > 3000 to 200 pairs, while Sooty Shearwaters Ardenna grisea expanded by two orders of magnitude. Due to its isolation and tight fisheries management, the Falklands marine environment is assumed to be relatively pristine. Our limited results suggest that sufficient changes may nevertheless have occurred in the region's marine ecosystem to have detectable impacts on breeding seabirds.
机译：检测变化对于有效的生态系统管理是必要的，但是许多极地和亚极地区缺少关键生态系统组成的时间数据。例如，尽管福克兰群岛拥有国际上重要的海洋和沿海鸟类种群，但直到20世纪后期才对这些鸟类进行了调查。但是，在1958年至1963年之间对一个小岛肾脏岛的航空动物进行了调查。这个典型的被长满草s的岛屿仍然没有外来的掠食者，因此其鸟类的变化可能反映了更广泛的海洋环境的变化。为了获得此类变化的罕见快照，我们在2017年至2019年之间对肾脏岛的鸟类进行了重新调查，计算了个体，繁殖对或海洋和沿海水鸟的巢地。水禽，涉水者和cor种群在总体上是稳定的，但是在六个调查之间的六个十年中，有几个种群表现出深远的差异。尤其是，南部的Rockhopper企鹅Eudyptes chrysocome从> 3000对跌落至200对，而Sooty Shearwaters Ardenna的灾难则扩大了两个数量级。由于其孤立和严格的渔业管理，福克兰群岛的海洋环境被认为是相对原始的。我们有限的结果表明，尽管如此，该地区的海洋生态系统可能已经发生了足够的变化，从而对繁殖海鸟产生了可察觉的影响。

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  • 来源
    《Polar biology》 |2019年第11期|2171-2176|共6页
  • 作者

    Catry P.; Clark T. J.; Crofts S.; Stanworth A.; Wakefield E. D.;

  • 作者单位

    ISPA Inst Univ MARE Marine & Environm Sci Ctr Rua Jardim Tabaco 34 P-1149041 Lisbon Portugal;

    Univ Glasgow Inst Biodivers Anim Hlth & Comparat Med Graham Kerr Bldg Glasgow G12 8QQ Lanark Scotland|Univ Montana WA Franke Coll Forestry & Conservat Dept Ecosyst & Conservat Sci Wildlife Biol Program Missoula MT 59812 USA;

    Falklands Conservat 41 Ross Rd Stanley Falkland Island;

    Univ Glasgow Inst Biodivers Anim Hlth & Comparat Med Graham Kerr Bldg Glasgow G12 8QQ Lanark Scotland;

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  • 正文语种 eng
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  • 关键词

    Kelp Goose; Falkland Steamer duck; Rockhopper penguin; Ardenna gravis; Haematopus ater; Falkland Islands;

    机译：海带鹅;福克兰蒸鸭;凤冠企鹅;重度Ardenna;血红球菌福克兰群岛;

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