Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/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
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ISSN | 1387-3547 |
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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