通过评估栖息地和保护区的使用情况,探讨东亚灰雁种群增长的潜在原因

IF 1.5 4区 环境科学与生态学 Q3 BIODIVERSITY CONSERVATION
Junjian Zhang, Xianghuang Li, N. Batbayar, Zhenggang Xu, Lei Cao, A. D. Fox
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引用次数: 3

摘要

在长江漫滩越冬的6种同域天鹅和鹅中,近20年来只有灰雁和黄豆鹅的数量呈增加趋势。到目前为止,人们对蒙古高原东部的灰雁繁殖几乎一无所知,我们现在知道灰雁主要在长江漫滩过冬。利用GPS发射机对20只灰雁在长江漫滩和蒙古东部的夏季、冬季、春季和秋季(n = 6、8、8、7)的活动轨迹进行了分析,并将这些位置叠加在栖息地类型和国家级保护区的GIS层上,模拟了它们的栖息地选择。大雁夏季在达斡尔地区、惠河国家级自然保护区和乌拉盖湿地(保护区内55%的GPS定标位于此),冬季在鄱阳湖、龙干湖和安庆湖(43%)越冬,在渤海湾、希拉木伦河和乌拉盖湿地周围活动(春季,48%);秋天,45%)。鹅在夏季主要利用自然生态系统(主要是草地和湿地/水体),但在其他三个季节,17%(春季)至46%(冬季)的时间利用农田,其余大部分时间在湿地/水体上。在冬季和春季/秋季的迁徙中,鹅经常与湿地和湖泊/湿地附近的地区联系在一起。这些结果表明,灰雁在非繁殖季节越来越多地转向农田取食,并且全年都享有使用保护区的好处。我们推断,这些因素可能潜在地促进了近年来采样群中存活率和繁殖成功率的提高(相对较高),这可以解释近年来与其他同域越冬鹅和天鹅物种相比,灰雁种群的保护地位较好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exploring potential reasons for the increase in the East Asian Greylag Goose Anser anser population by assessing habitat use and use of protected areas
Summary Among the six sympatric swan and goose species wintering in the Yangtze River floodplain, only Greylag Goose Anser anser and Bean Goose A. fabalis showed increasing population trends in the last 20 years. Until now, almost nothing was known about the Greylag Geese breeding on the eastern Mongolian Plateau, which we now know mostly winter in the Yangtze River floodplain. We applied GPS transmitters to 20 Greylag Geese in the Yangtze River floodplain and eastern Mongolia, providing complete tracks of their movements in summer, winter, spring and autumn (n = 6, 8, 8, 7). We overlaid these locations on GIS layers of habitat type and national-level protected areas, and modelled their habitat selection. Geese summered in Dauria Region, Huihe National Nature Reserve, and Wulagai Wetlands (from where 55% of GPS fixes were located in protected areas), wintered in Poyang Lake, Longgan Lake, and Anqing Lakes (43%), and staged around Bohai Bay, Xila Mulun River, and Wulagai Wetlands (spring, 48%; autumn, 45%). Geese mainly used natural ecosystems in summer (essentially grasslands and wetlands/water bodies), but in the other three seasons, used croplands between 17% (spring) and 46% (winter) of the time, with most of the rest of the time spent on wetlands/water bodies. Geese were frequently associated with wetlands and areas close to lakes/wetlands in all seasons, and cropland during winter and spring/autumn migration. These results suggest Greylag Geese in this biogeographical sub-population have increasingly shifted to feeding in croplands during the non-breeding season and enjoy the benefit of using protected areas throughout the year. We infer that these factors could have potentially contributed to elevated survival and reproductive success (relatively high among sampled flocks in recent years) which could explain the favourable conservation status of this population of Greylag Geese in recent years compared to other sympatric wintering goose and swan species.
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来源期刊
CiteScore
3.40
自引率
6.20%
发文量
50
审稿时长
>12 weeks
期刊介绍: Bird Conservation International is a quarterly peer-reviewed journal that seeks to promote worldwide research and action for the conservation of birds and the habitats upon which they depend. The official journal of BirdLife International, it provides stimulating, international and up-to-date coverage of a broad range of conservation topics, using birds to illuminate wider issues of biodiversity, conservation and sustainable resource use. It publishes original papers and reviews, including targeted articles and recommendations by leading experts.
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