Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1006/jare.2001.0824 |
Ant communities and livestock grazing in the Great Basin, USA | |
Nash, MS; Whitford, WG; Bradford, DF; Franson, SE; Neale, AC; Heggem, DT | |
通讯作者 | Nash, MS |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS |
ISSN | 0140-1963 |
出版年 | 2001 |
卷号 | 49期号:4页码:695-710 |
英文摘要 | The objectives of this study were to determine if metrics for ant species assemblages can be used as indicators of rangeland condition, and to determine the influence of vegetation and ground cover variables, factors often influenced by livestock grazing, on ant communities. The study was conducted in two areas in the Great Basin: a sagebrush-steppe in southeastern Idaho (n = 30 sites), and a salt-desert shrub in western Utah (n = 27 sites). Sites were selected based on known rangeland condition (i.e. good, fair, poor) associated with livestock grazing. Ant communities differed considerably between the two study areas. Collectively, more ant species occurred at the Idaho sites (30) than at the Utah sites (21), relatively few species (eight) occurred in both areas, species richness was significantly greater at the Idaho sites (mean = 12(.)0 species) than the Utah sites (mean = 6(.)9 species), and Formica spp. were diverse (total of 15 species) at the Idaho sites but rare (one species) at the Utah sites. In Idaho, all species collectively, generalists, and Formica spp. were significantly less abundant on sites in poor condition than that on sites in good or fair condition, whereas in Utah, seed harvesters and Pheidole spp. were significantly more abundant on sites in poor condition than that on sites in good or fair condition. In Idaho, species richness was significantly lower on sites in poor condition. In Idaho, species richness and relative abundances of several ant groups were significantly related to bare patch size and parameters for cover or species richness of several vegetation groups. In contrast to the comparisons involving sites in poor condition, no differences in ant communities in either Idaho or Utah were evident between sites in good and fair condition. Thus, the ant communities responded only to large changes in rangeland condition and to large differences in climatic/edaphic conditions between the two areas. Hence, ant community metrics appear to have limited utility as indicators of rangeland condition in the Great Basin. (C) 2001 Academic Press. |
英文关键词 | indicator livestock grazing ant vegetation bare patches Great Basin range condition cool desert |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000173469500004 |
WOS关键词 | SEED-HARVESTER ANTS ; SOUTHEASTERN ARIZONA ; CHIHUAHUAN DESERT ; BIOLOGICAL INTEGRITY ; INDICATORS ; AUSTRALIA ; DIVERSITY ; PATTERNS ; RECOLONIZATION ; ORGANIZATION |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | New Mexico State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/141117 |
作者单位 | (1)US EPA, Las Vegas, NV 89193 USA;(2)New Mexico State Univ, USDA ARS, Jornada Expt Range, Las Cruces, NM 88003 USA;(3)US EPA, Cincinnati, OH 45268 USA |
推荐引用方式 GB/T 7714 | Nash, MS,Whitford, WG,Bradford, DF,et al. Ant communities and livestock grazing in the Great Basin, USA[J]. New Mexico State University,2001,49(4):695-710. |
APA | Nash, MS,Whitford, WG,Bradford, DF,Franson, SE,Neale, AC,&Heggem, DT.(2001).Ant communities and livestock grazing in the Great Basin, USA.JOURNAL OF ARID ENVIRONMENTS,49(4),695-710. |
MLA | Nash, MS,et al."Ant communities and livestock grazing in the Great Basin, USA".JOURNAL OF ARID ENVIRONMENTS 49.4(2001):695-710. |
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