Estimating the relative abundance of emperor penguins at inaccessible colonies using satellite imagery
Estimating the relative abundance of emperor penguins at inaccessible colonies using satellite imagery
复制标题
DOI：
10.1007/s00300-007-0317-8
复制
发表时间：
2007-11-01
期刊：
影响因子：
1.7
通讯作者：
Ponganis, Paul J.
中科院分区：
文献类型：
--
作者：
Barber-Meyer, Shannon M.;Kooyman, Gerald L.;Ponganis, Paul J.
帝企鹅（Aptenodytes forsteri）的数量是有用的环境指标，因为这种鸟极度依赖海冰。我们利用遥感技术估算了南极洲罗斯海两个难以进入的帝企鹅群落的相对成年鸟类丰度。我们对罗斯海七个已知种群的12张全色卫星图像进行了监督分类。通过将可到达的蜂群卫星图像中被分类为“企鹅”的像素数与航拍照片或地面上相应的已知成鸟数量相关联，利用回归方法预测了不可到达的蜂群的成鸟数量。虽然我们的分析受到过多鸟粪和阴影的阻碍，但我们使用卫星图像来区分相对较小（< 3,000只成年鸟）和较大的群体（约5,000只成年鸟）。当目的是记录企鹅的存在和（或）大的帝企鹅种群变化（例如，灾难性变化）时，遥感技术在后勤上的强度和成本比空中或地面普查要低。预计不久卫星图像的分辨率将有所提高，这将使丰度估算更加准确。
Emperor penguin (Aptenodytes forsteri) populations are useful environmental indicators due to the bird's extreme reliance on sea ice. We used remote sensing technology to estimate relative adult bird abundance at two inaccessible emperor penguin colonies in the Ross Sea, Antarctica. We performed supervised classification of 12 panchromatic satellite images of the seven known Ross Sea colonies. We used regression to predict adult bird counts at the inaccessible colonies by relating the number of pixels classified as "penguin" in the satellite images of the accessible colonies to corresponding known adult bird counts from aerial photographs or ground counts. While our analysis was hampered by excessive guano and shadows, we used satellite imagery to differentiate between relatively small (< 3,000 adult birds) and larger colonies (> 5,000 adult birds). Remote sensing technology is logistically less intense and less costly than aerial or ground censuses when the objective is to document penguin presence and/or large emperor penguin population changes (e.g., catastrophic changes). Improvements expected soon in the resolution of the satellite images should allow for more accurate abundance estimates.