干旱区生态环境知识资源中心(Arid): Distribution and relative density of raptors in the sub-Sahara during the dry season

Arid

DOI	10.5253/arde.2023.a6
	Distribution and relative density of raptors in the sub-Sahara during the dry season
	Bijlsma, Rob G.; Van der Kamp, Jan; Zwarts, Leo
通讯作者	Bijlsma, RG
来源期刊	ARDEA
ISSN	0373-2266
EISSN	2213-1175
出版年	2023
卷号	111 期号:1 页码:103-117
英文摘要	The sub-Sahara between the Atlantic Ocean and Red Sea and between 5 degrees N (Guinean vegetation zone) and 20 degrees N (southern Sahara) was visited on 466 days during 15 dry seasons (late September - early March) in 1996-2019. Using a combination of field methods, ranging from road counts to surveys of single sites (non-random and random-stratified), a total of 22,696 raptors of 62 species were identified. These were allocated to 1 degrees latitude-longitude grid cells. Palearctic migrants accounted for 13% of the total. Two Afrotropical raptors were by far the most common, Yellow-billed Kite Milvus aegyptius (46%) and Hooded Vulture Necrosyrtes monachus (25%). Diversity and density were lowest in the arid and semi-arid zones but increased with increasing annual rainfall and vegetation cover. Palearctic migrants almost exclusively occupied the driest zones (100-500 mm rainfall per year), African raptors were commonest in the more humid zones. Migrants were concentrated in the western and eastern sections of the sub-Sahara, in longitudinal agreement with the main crossing points on either side of the Mediterranean for the large majority of Palearctic migrants. Comparatively few migrants were encountered in the central Sahel (Mali-NigerChad), suggesting that most Palearctic raptors remained either in West or in East Africa upon entering the continent. Even harriers Circus spp., known to cross the full width of the Mediterranean Sea, showed a distinct East Africa bias in their distribution. Afrotropical raptors were more evenly distributed across the width of the sub-Sahara within the 100-1000-mm rainfall zone.
英文关键词	Sahel birds of prey bird distribution relative density
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:001028733200004
WOS关键词	VULTURES NEOPHRON-PERCNOPTERUS ; AFRICAN BIRDS ; WEST-AFRICA ; HABITAT USE ; CONSERVATION ; ABUNDANCE ; HARRIERS ; MIGRANTS ; TRENDS ; PREY
WOS类目	Ornithology
WOS研究方向	Zoology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395441
推荐引用方式 GB/T 7714	Bijlsma, Rob G.,Van der Kamp, Jan,Zwarts, Leo. Distribution and relative density of raptors in the sub-Sahara during the dry season[J],2023,111(1):103-117.
APA	Bijlsma, Rob G.,Van der Kamp, Jan,&Zwarts, Leo.(2023).Distribution and relative density of raptors in the sub-Sahara during the dry season.ARDEA,111(1),103-117.
MLA	Bijlsma, Rob G.,et al."Distribution and relative density of raptors in the sub-Sahara during the dry season".ARDEA 111.1(2023):103-117.