干旱区生态环境知识资源中心(Arid): The spatial scale of homogenisation and differentiation in Chihuahuan Desert fish assemblages

Arid

DOI	10.1111/fwb.13211
	The spatial scale of homogenisation and differentiation in Chihuahuan Desert fish assemblages
	Taylor, Christopher M.1,2; Miyazono, Seiji 3; Cheek, Christopher A.4; Edwards, Robert J.1; Patino, Reynaldo 5
通讯作者	Taylor, Christopher M.
来源期刊	FRESHWATER BIOLOGY
ISSN	0046-5070
EISSN	1365-2427
出版年	2019
卷号	64 期号:1 页码:222-232
英文摘要	We examined riverine desert fish assemblages in the Chihuahuan Desert, U.S.A. at multiple spatial scales of similarity to assess long-term changes to assemblage distinctiveness, identify individual species responsible for changes, and determine the importance of geographic context and species resolution in interpreting patterns of change. We used a well-documented historical data set on fish distribution and abundance, and recent collections of fishes that provided a paired analytical design across 36 localities spanning nearly 3 decades. Patterns of faunal homogenisation and differentiation were assessed at basin-wide, sub-basin and river-reach scales with species occurrence and relative abundance data. Individual species responses were examined to identify the drivers of assemblage change across time. Patterns of assemblage similarity varied across spatial scales and produced seemingly incongruous trends across time. Assemblage distinctiveness depended on the spatial extent of the analyses, the geographical structuring of the fish assemblages, and whether occurrence or relative abundance data were used. These dependencies led to interesting and conflicting patterns of homogenisation and differentiation. The Rio Grande sub-basin showed strong homogenisation with convergence between upstream and downstream reaches that corresponded to declining water quality and quantity from the Rio Conchos in Mexico. In contrast, the Pecos River sub-basin showed strong differentiation between upstream and downstream reaches that corresponded to the successful colonisation and spread of the non-native gulf killifish (Fundulus grandis) in the upper reach, where water quantity and quality have declined. Spatial variability in fish assemblages and their degree of change from historical conditions were largely congruent with anthropogenic modifications to the flow regime and variability in the success of invasive gulf killifish in the basin. The use of species occurrence as opposed to relative abundance data, and the spatial scale of analysis are crucial choices in studies of faunal homogenisation and differentiation, and we have demonstrated how these choices lead to variable results for our study system. Our multi-scale approach and examination of individual species responses identified the ultimate drivers of these differences and illustrated the importance of scale-dependent effects and geographical context on patterns of assemblage distinctiveness, especially with regard to species invasion, species loss and relative abundance shifts.
英文关键词	assemblage differentiation assemblage homogenisation conservation biogeography fish ecology Rio Grande
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000453853500018
WOS关键词	FRESH-WATER FISH ; BIOTIC HOMOGENIZATION ; CONSERVATION BIOGEOGRAPHY ; ECOLOGICAL PROCESSES ; ABUNDANCE ; SALINIZATION ; PROGRESS ; HABITAT ; INDEXES
WOS类目	Ecology ; Marine & Freshwater Biology
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215735
作者单位	1.Univ Texas Rio Grande Valley, Dept Biol, Edinburg, TX 78539 USA; 2.Univ Texas Rio Grande Valley, Sch Earth Environm & Marine Sci, Edinburg, TX 78539 USA; 3.Texas Tech Univ, Texas Cooperat Fish & Wildlife Res Unit, Lubbock, TX 79409 USA; 4.Purdue Univ, Dept Forestry & Nat Resources, W Lafayette, IN 47907 USA; 5.Texas Tech Univ, US Geol Survey, Texas Cooperat Fish & Wildlife Res Unit, Lubbock, TX 79409 USA
推荐引用方式 GB/T 7714	Taylor, Christopher M.,Miyazono, Seiji,Cheek, Christopher A.,et al. The spatial scale of homogenisation and differentiation in Chihuahuan Desert fish assemblages[J]. United States Geological Survey,2019,64(1):222-232.
APA	Taylor, Christopher M.,Miyazono, Seiji,Cheek, Christopher A.,Edwards, Robert J.,&Patino, Reynaldo.(2019).The spatial scale of homogenisation and differentiation in Chihuahuan Desert fish assemblages.FRESHWATER BIOLOGY,64(1),222-232.
MLA	Taylor, Christopher M.,et al."The spatial scale of homogenisation and differentiation in Chihuahuan Desert fish assemblages".FRESHWATER BIOLOGY 64.1(2019):222-232.