干旱区生态环境知识资源中心(Arid): Arboreal birds do not avoid scattered trees in West Africa

Arid

DOI	10.1017/S0959270918000217
	Arboreal birds do not avoid scattered trees in West Africa
	Zwarts, Leo 1; Bijlsma, Rob G.2; Van Der Kamp, Jan 1
通讯作者	Zwarts, Leo
来源期刊	BIRD CONSERVATION INTERNATIONAL
ISSN	0959-2709
EISSN	1474-0001
出版年	2019
卷号	29 期号:2 页码:216-231
英文摘要	Arboreal birds tend to remain in woody vegetation and avoid crossing open areas. Therefore, few tree-dwelling birds are to be expected in scattered trees. We tested this expectation with field data collected in the deserts, savannas and open agricultural parklands of West Africa where woody cover in 1,327 stratified random study sites varied between 0.2 and 29%. We found no evidence that scattered trees were avoided. Instead, bird density in trees was independent of trees occurring clumped or singly. The presence of birds in an individual tree was related to tree species and tree-related variables, but not to woody cover or species composition of the surrounding woody vegetation. We hypothesise that scattered trees are not avoided because (1) travel time between trees is too short to have a negative impact on foraging time, (2) predation risk of arboreal passerines is very low (bird-hunting raptors are scarce in the deserts and savannas of West Africa and mostly prey on ground-feeding, not arboreal, birds), and (3) the probability of being chased away by other arboreal birds is less when trees are more scattered. Scattered trees are ecologically important since hundreds of millions of migratory woodland birds, of which several species are in decline, spend the northern winter in Africa in open, often human-modified, landscapes where trees are well spaced.
类型	Article
语种	英语
国家	Netherlands
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000475686300003
WOS关键词	GAP-CROSSING DECISIONS ; PREDATION RISK ; FOREST BIRDS ; PASSERINE MIGRANTS ; FORAGING BEHAVIOR ; FRUIT REMOVAL ; COVER ; DENSITIES ; SELECTION ; FLOCKING
WOS类目	Biodiversity Conservation ; Ornithology
WOS研究方向	Biodiversity & Conservation ; Zoology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214680
作者单位	1.Altenburg & Wymenga Ecol Consultants, Suderwei 2, NL-9269 TZ Feanwalden, Netherlands; 2.Univ Groningen, Groningen Inst Evolutionary Life Sci, POB 11103, NL-9700 CC Groningen, Netherlands
推荐引用方式 GB/T 7714	Zwarts, Leo,Bijlsma, Rob G.,Van Der Kamp, Jan. Arboreal birds do not avoid scattered trees in West Africa[J],2019,29(2):216-231.
APA	Zwarts, Leo,Bijlsma, Rob G.,&Van Der Kamp, Jan.(2019).Arboreal birds do not avoid scattered trees in West Africa.BIRD CONSERVATION INTERNATIONAL,29(2),216-231.
MLA	Zwarts, Leo,et al."Arboreal birds do not avoid scattered trees in West Africa".BIRD CONSERVATION INTERNATIONAL 29.2(2019):216-231.