Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1006/jare.2000.0769 |
Effects of fire, grazing, and the presence of shrubs on Chihuahuan desert grasslands | |
Drewa, PB; Havstad, KM | |
通讯作者 | Drewa, PB |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS |
ISSN | 0140-1963 |
出版年 | 2001 |
卷号 | 48期号:4页码:429-443 |
英文摘要 | Responses of herbaceous and suffrutescent species to fire, grazing, and presence of Prosopis glandulosa were examined in a Chihuahuan desert grassland in south-central New Mexico. Treatments were assigned randomly to eight 12 x 8 m plots within each of two blocks. Following fires in June 1995, unfenced plots were exposed to livestock grazing over 4 years. Plots were established that either included or excluded P. glandulosa. Perennial grass cover, primarily Bouteloua eriopoda, decreased by 13% in burned plots but increased 5% in unburned areas. Conversely, perennial forb cover was 4% greater after fire. Perennial grass frequency decreased 30% more and perennial forb frequency increased 10% more following burning. Further, increases in evenness after fire resulted in a 225% increase in species diversity. Grazing also resulted in a decrease in perennial grass cover while frequency decreased 22% more in grazed than ungrazed plots. Only frequency and not cover of perennial forbs and annual grasses increased more following grazing. Presence of P. glandulosa had no differential effect on responses of non-shrub species. Fires were conducted during near drought conditions while grazing occurred during years of precipitation equivalent to the long-term average. Precipitation immediately following fire may be critical for recovery of B. eriopoda-dominated desert grasslands; relationships between fire and postfire precipitation patterns require future investigation. (C) 2001 Academic Press. |
英文关键词 | Bouteloua eriopoda diversity drought herbaceous species livestock prescribed fires Prosopis glandulosa |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000170135400001 |
WOS关键词 | SOUTHERN NEW-MEXICO ; HONEY MESQUITE ; VEGETATION RESPONSE ; SEMIARID GRASSLAND ; TALLGRASS PRAIRIE ; SONORAN DESERT ; ANNUAL PLANTS ; WATER-USE ; DIVERSITY ; SUCCESSION |
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/2XILL650/141082 |
作者单位 | (1)New Mexico State Univ, USDA ARS, Jornada Expt Range, Las Cruces, NM 88003 USA |
推荐引用方式 GB/T 7714 | Drewa, PB,Havstad, KM. Effects of fire, grazing, and the presence of shrubs on Chihuahuan desert grasslands[J]. New Mexico State University,2001,48(4):429-443. |
APA | Drewa, PB,&Havstad, KM.(2001).Effects of fire, grazing, and the presence of shrubs on Chihuahuan desert grasslands.JOURNAL OF ARID ENVIRONMENTS,48(4),429-443. |
MLA | Drewa, PB,et al."Effects of fire, grazing, and the presence of shrubs on Chihuahuan desert grasslands".JOURNAL OF ARID ENVIRONMENTS 48.4(2001):429-443. |
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