干旱区生态环境知识资源中心(Arid): Vegetation Structural Attributes Providing Thermal Refugia for Northern Bobwhites

Arid

DOI	10.1002/jwmg.22006
	Vegetation Structural Attributes Providing Thermal Refugia for Northern Bobwhites
	Palmer, Brandon J.; Fulbright, Timothy E.; Grahmann, Eric D.; Hernandez, Fidel; Hehman, Michael W.; Wester, David B.
通讯作者	Palmer, BJ (corresponding author), Texas A&M Univ, Caesar Kleberg Wildlife Res Inst, Kingsville, TX 78363 USA.
来源期刊	JOURNAL OF WILDLIFE MANAGEMENT
ISSN	0022-541X
EISSN	1937-2817
出版年	2021
卷号	85 期号:3 页码:543-555
英文摘要	The northern bobwhite (Colinus virginianus; bobwhite) exists at the edge of its thermal tolerance in southern Texas, USA, a region characterized by extreme heat and periodic drought. Extreme heat and drought events are predicted to increase in frequency and intensity in semi-arid regions, leading biologists to emphasize management of thermal cover. The degree to which temperatures within patches of woody vegetation vary and the specific vegetation structural characteristics that create cooler microclimates within these patches are unknown. We evaluated temperature variation between selected and available sites, vegetation characteristics facilitating cooler microsites, and whether these characteristics in addition to temperature were important predictors of microsite selection within woody patches. We radio-tracked 83 bobwhites 2-3 times/week during April-August 2017-2018. We recorded operative and ground surface temperatures and measured woody and herbaceous vegetation height, canopy density, and overlapping woody and herbaceous cover at used and paired random locations. Within the same woody patch, 80% of used locations contained operative temperatures lower than or equal to random locations. There was a weak relationship between the vegetation variables we measured and temperature at paired locations, indicating that none of the vegetation variables alone can effectively reduce temperatures. Temperatures within woody patches are likely strongly tied to diurnal variation in solar angle and ability to create shade. Cooler temperatures, dense canopies, and overlapping woody vegetation had the greatest effects on relative probability of microsite use during the middle of the day, whereas warmer temperatures and taller woody vegetation had the greatest relative effects during the morning and evening. Our results suggest that temperature was influential across diurnal periods but foraging and predation avoidance may have also been important. Maintenance and preservation of dense woody vegetation and diverse shrub understories must be prioritized in habitat management for bobwhites in semi-arid regions. (c) 2021 The Wildlife Society.
英文关键词	Colinus virginianus northern bobwhite semi-arid temperature Texas thermal refugia vegetation woody vegetation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000613353100001
WOS类目	Ecology ; Zoology
WOS研究方向	Environmental Sciences & Ecology ; Zoology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351053
作者单位	[Palmer, Brandon J.; Fulbright, Timothy E.; Hernandez, Fidel; Wester, David B.] Texas A&M Univ, Caesar Kleberg Wildlife Res Inst, Kingsville, TX 78363 USA; [Grahmann, Eric D.] Coyote Ranch, Riviera, TX 78379 USA; [Hehman, Michael W.] Hixon Ranch, Cotulla, TX 78014 USA
推荐引用方式 GB/T 7714	Palmer, Brandon J.,Fulbright, Timothy E.,Grahmann, Eric D.,et al. Vegetation Structural Attributes Providing Thermal Refugia for Northern Bobwhites[J],2021,85(3):543-555.
APA	Palmer, Brandon J.,Fulbright, Timothy E.,Grahmann, Eric D.,Hernandez, Fidel,Hehman, Michael W.,&Wester, David B..(2021).Vegetation Structural Attributes Providing Thermal Refugia for Northern Bobwhites.JOURNAL OF WILDLIFE MANAGEMENT,85(3),543-555.
MLA	Palmer, Brandon J.,et al."Vegetation Structural Attributes Providing Thermal Refugia for Northern Bobwhites".JOURNAL OF WILDLIFE MANAGEMENT 85.3(2021):543-555.