Drastic decline in the endemic brown shrike subspecies Lanius cristatus superciliosus in Japan
Drastic decline in the endemic brown shrike subspecies Lanius cristatus superciliosus in Japan
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DOI：
10.1017/s0959270920000556
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发表时间：
2022-03-01
影响因子：
1.6
通讯作者：
Mizumura, Haruka
中科院分区：
文献类型：
--
作者：
Kitazawa, Munehiro;Senzaki, Masayuki;Mizumura, Haruka
布朗伯劳Lanius cristatus品种跨越东亚的大部分地区。1个亚种，L. C. superciliosus，主要是日本特有的，历史上在其整个繁殖范围内丰富。然而，当地和大规模的研究都记录了20世纪70年代和90年代之间的人口急剧下降，目前在日本无法获得该分类群的地位。我们进行了一项全国性的调查，以估计目前的人口规模和繁殖范围内的这个亚种在日本。我们进一步比较了我们的研究结果的历史育种范围，通过文献综述。总人口规模估计为149对繁殖，目前的繁殖范围估计为6，800 km（2），表明在过去的世纪范围缩小了90.9%。我们的研究强调了保护剩余的繁殖栖息地和建立有效的保护策略的紧迫性。C.目空一切
The Brown Shrike Lanius cristatus breeds across a large portion of eastern Asia. One subspecies, L. c. superciliosus, is primarily endemic to Japan and was historically abundant throughout its breeding range. However, both local- and broad-scale studies documented a drastic population decline between the 1970s and 1990s, and the status of the taxon is currently unavailable in Japan. We conducted a nationwide survey to estimate the current population size and breeding range of this subspecies within Japan. We further compared our findings to the historical breeding ranges through a literature review. The total population size was estimated at 149 breeding pairs, and the current breeding range was estimated at 6,800 km(2), indicating a 90.9% range contraction over the past century. Our study highlights the urgency of protecting remaining breeding habitats and establishing effective conservation strategies for L. c. superciliosus.