Arid
DOI10.1007/s10530-009-9653-7
Structural changes in vegetation coincident with annual grass invasion negatively impacts sprint velocity of small vertebrates
Rieder, J. P.1,2; Newbold, T. A. S.1,3; Ostoja, S. M.1,4
通讯作者Rieder, J. P.
来源期刊BIOLOGICAL INVASIONS
ISSN1387-3547
出版年2010
卷号12期号:8页码:2429-2439
英文摘要

Sagebrush ecosystems in the intermountain west of the United States are being threatened by conversion to the non-native grass, cheatgrass (Bromus tectorum). The dramatic shift in the physical structure of vegetation coincident with cheatgrass invasion likely has negative impacts on animal communities, yet these structural impacts have not been well-studied. In a previous study, dense cheatgrass stems reduced sprint velocity for the flattened, wide-bodied desert horned lizard (Phrynosoma platyrhinos). Here, we asked if a decrease in sprint velocity due to cheatgrass impediment can be generalized to the suite of small vertebrates inhabiting the sagebrush ecosystems of western Utah. We evaluated sprint performance of the common rodent (n = 3) and lizard (n = 4) species on two raceway types, cheatgrass and no-cheatgrass, and hypothesized that body size, body shape, and form of movement are important factors influencing sprint velocity through dense cheatgrass stems. All species showed significant reductions in speed on cheatgrass versus no-cheatgrass raceways, with percent reduction greatest for larger, wider, or hopping organisms compared to smaller, more slender, or running organisms. Of concern, surveys for rodents and lizards at our study areas support a common pattern: lower abundances of small vertebrates, as well as a loss of rodent species richness, in areas infested with cheatgrass compared to intact, native sagebrush communities. By extension, we expect a negative impact on animal communities in other semi-arid regions experiencing dramatic shifts in vegetation structure upon invasion by non-native grasses that are capable of forming dense stands in the interspaces of native desert plants [e.g., Sonoran desert invaded by buffelgrass (Pennisetum ciliare)].


英文关键词Utah sagebrush ecosystems Vegetation structure Sprint performance Heteromyid rodents Lizards Species richness and abundance
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000279682800007
WOS关键词CHEATGRASS BROMUS-TECTORUM ; BIRD SPECIES-DIVERSITY ; HABITAT RELATIONSHIPS ; EXOTIC GRASSES ; SPATIAL HETEROGENEITY ; SOUTHWESTERN IDAHO ; RODENT COMMUNITIES ; GROUND-SQUIRRELS ; MICROHABITAT USE ; ARID GRASSLAND
WOS类目Biodiversity Conservation ; Ecology
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构United States Geological Survey ; Colorado State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/163473
作者单位1.Utah State Univ, Ctr Ecol, Logan, UT 84322 USA;
2.Colorado State Univ, Dept Forest Rangeland & Watershed Stewardship, Ft Collins, CO 80523 USA;
3.Natl Pk Serv Inventory & Monitoring Program, Mojave Desert Network, Boulder City, NV 89005 USA;
4.US Geol Survey, Western Ecol Res Ctr, Yosemite Field Stn, El Portal, CA 95318 USA
推荐引用方式
GB/T 7714
Rieder, J. P.,Newbold, T. A. S.,Ostoja, S. M.. Structural changes in vegetation coincident with annual grass invasion negatively impacts sprint velocity of small vertebrates[J]. United States Geological Survey, Colorado State University,2010,12(8):2429-2439.
APA Rieder, J. P.,Newbold, T. A. S.,&Ostoja, S. M..(2010).Structural changes in vegetation coincident with annual grass invasion negatively impacts sprint velocity of small vertebrates.BIOLOGICAL INVASIONS,12(8),2429-2439.
MLA Rieder, J. P.,et al."Structural changes in vegetation coincident with annual grass invasion negatively impacts sprint velocity of small vertebrates".BIOLOGICAL INVASIONS 12.8(2010):2429-2439.
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