干旱区生态环境知识资源中心(Arid): Twenty-year changes in riparian bird communities of east-central Oregon

Arid

DOI	10.1676/18-35
	Twenty-year changes in riparian bird communities of east-central Oregon
	Ellis, Michael S.1,2,6; Kennedy, Patricia L.1,2; Edge, W. Daniel 3,4; Sanders, Todd A.5
通讯作者	Ellis, Michael S.
来源期刊	WILSON JOURNAL OF ORNITHOLOGY
ISSN	1559-4491
EISSN	1938-5447
出版年	2019
卷号	131 期号:1 页码:43-61
英文摘要	Riparian zones in the semi-arid West are disproportionately important habitats for both breeding birds and agricultural operations. Despite growing interest in studying avian-habitat relationships to inform land management decisions, few studies have described temporal changes in riparian bird communities. We compared indices of avian abundance and diversity from 3 streamside vegetation associations in east-central Oregon during May-June 2014 with indices from 1993-1994. Our objectives were to identify patterns of change in the avian community with a focus on riparian shrub-dependent species, re-examine previously reported relationships between avian abundance and vegetation volume, and identify possible causes of declines in bird abundance and diversity. We combined historical field protocols to survey birds and measure riparian vegetation with modern analytical techniques. We found few differences in species richness between study periods but documented approximately 30% species turnover. Increases in diversity were driven by increased detections of grassland and wetland bird species and increased evenness due to precipitous declines in detections for 2 of 3 riparian shrub-dependent focal species (i.e., Yellow Warbler [Setophaga petechia] and Willow Flycatcher [Empidonax traillii]). Detections of Song Sparrows (Melospiza melodia), our third focal species, declined by a smaller margin. Large changes in detections of riparian shrub-dependent species did not reflect trends in mesic shrub cover or volume, which had been identified as likely drivers of obligate species abundance. Focal species' declines reflected regional Breeding Bird Survey trends, corroborating our finding that their declines were not a result of changes in local site conditions. Our findings suggest that managing lands to increase wetness and extent of riparian zones can be beneficial for grassland and wetland bird species. However, managing for riparian shrub cover or volume, important metrics of grazing intensity and riparian system health, may be insufficient to conserve riparian shrub-dependent birds because other unidentified local and/or regional factors are likely contributing to habitat suitability of riparian shrub-dependent birds.
英文关键词	community ecology historical data Intermountain West riparian vegetation Song Sparrow wetland Willow Flycatcher Yellow Warbler
类型	Article
语种	英语
国家	USA ; Ecuador
收录类别	SCI-E
WOS记录号	WOS:000463904300005
WOS关键词	BROWN-HEADED COWBIRDS ; EXTRAPOLATION ; RAREFACTION ; ECOSYSTEMS ; VEGETATION
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/2XILL650/219335
作者单位	1.Oregon State Univ, Dept Fisheries & Wildlife, Union, OR 97331 USA; 2.Oregon State Univ, Eastern Oregon Agr & Nat Resource Program, Union, OR 97331 USA; 3.Oregon State Univ, Dept Fisheries & Wildlife, Corvallis, OR 97331 USA; 4.Oregon State Univ, Coll Agr Sci, Corvallis, OR 97331 USA; 5.US Fish & Wildlife Serv, Div Migratory Bird Management, Vancouver, WA USA; 6.Third Millennium Alliance, Quito, Pichincha, Ecuador
推荐引用方式 GB/T 7714	Ellis, Michael S.,Kennedy, Patricia L.,Edge, W. Daniel,et al. Twenty-year changes in riparian bird communities of east-central Oregon[J],2019,131(1):43-61.
APA	Ellis, Michael S.,Kennedy, Patricia L.,Edge, W. Daniel,&Sanders, Todd A..(2019).Twenty-year changes in riparian bird communities of east-central Oregon.WILSON JOURNAL OF ORNITHOLOGY,131(1),43-61.
MLA	Ellis, Michael S.,et al."Twenty-year changes in riparian bird communities of east-central Oregon".WILSON JOURNAL OF ORNITHOLOGY 131.1(2019):43-61.