干旱区生态环境知识资源中心(Arid): Local extinctions exceed colonization rates in a bird community during dry years in the Brazilian Caatinga

Arid

DOI	10.1007/s43388-020-00016-z
	Local extinctions exceed colonization rates in a bird community during dry years in the Brazilian Caatinga
	Toledo-Lima, Guilherme S.; Pichorim, Mauro
通讯作者	Toledo-Lima, GS
来源期刊	ORNITHOLOGY RESEARCH
EISSN	2662-673X
出版年	2020
卷号	28 期号:2 页码:86-97
英文摘要	Droughts typically result in a widespread decline in many vertebrate populations and even the local extinction of some species. However, different species vary considerably in their resistance to the effects of drought. This study aimed to estimate the relative species richness and the colonization and extinction rates in a bird community during an acute drought event in the Brazilian Caatinga. We mist-netted birds during 3 years throughout seven field seasons in two sampling plots to estimate community parameters using multi-season dynamic occupancy models. The relative richness to the regional species pool varied considerably during the study period (16-49%) with markedly low values in the severe onset of the drought. The estimates in the savanna were higher than those in the shrubby-woodland plot similar to 42 vs similar to 31 species, respectively). Pollinators and seed dispersers were characterized by median to high colonization (30-69%) and local extinction rates (37-69%), indicating low site fidelity. By contrast, granivores and insectivores made up the resident component of the community, with low local extinction and colonization rates (< 30%). Our results indicate that the diversity of Caatinga bird assemblages may decline markedly during severe droughts, primarily as a result of the displacement of species that exploit resources whose availability decreases drastically in abnormally dry years. Considering the climate scenarios predicted for tropical arid and semiarid regions worldwide, we believe that pollinators and seed dispersers will be especially vulnerable to population decline and local extinctions, which will alter community structure and the persistence of ecosystem services.
英文关键词	Drought Functional groups Imperfect detection Multiple-season occupancy models Relative species richness Resource bottlenecks
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000579847600002
WOS关键词	MONTE DESERT ; SPECIES RICHNESS ; SEVERE DROUGHT ; RESPONSES ; ASSEMBLAGES ; ABUNDANCE ; RAINFALL ; POPULATIONS ; RESISTANCE ; HABITAT
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/2XILL650/326900
作者单位	[Toledo-Lima, Guilherme S.] Univ Fed Rio Grande do Norte, Programa Posgrad Ecol, Natal, RN, Brazil; [Pichorim, Mauro] Univ Fed Rio Grande do Norte, Dept Bot & Zool, Natal, RN, Brazil
推荐引用方式 GB/T 7714	Toledo-Lima, Guilherme S.,Pichorim, Mauro. Local extinctions exceed colonization rates in a bird community during dry years in the Brazilian Caatinga[J],2020,28(2):86-97.
APA	Toledo-Lima, Guilherme S.,&Pichorim, Mauro.(2020).Local extinctions exceed colonization rates in a bird community during dry years in the Brazilian Caatinga.ORNITHOLOGY RESEARCH,28(2),86-97.
MLA	Toledo-Lima, Guilherme S.,et al."Local extinctions exceed colonization rates in a bird community during dry years in the Brazilian Caatinga".ORNITHOLOGY RESEARCH 28.2(2020):86-97.