Knowledge Resource Center for Ecological Environment in Arid Area
| 报告编号 | PB2009113461 |
| Effectiveness of Postfire Seeding to Reduce Cheatgrass (Bromus tectorum) Growth and Reproduction in Recently Burned Sagebrush Steppe. | |
| [unavailable] | |
| 英文摘要 | Recent invasions by non-native grasses have increased the amount and continuity of fuels which has increased the frequency of fire in a variety of ecosystems worldwide (D’Antonio and Vitousek 1993, Brooks 1999, Brooks et al. 2004). In sagebrush steppe of the Great Basin desert, the expansion of non-native annual grasses, cheatgrass (Bromus tectorum) in particular, during the 1900s has decreased fire return intervals from 30 to 100 years to <5 years in many areas (Whisenant 1990). Where these dramatically shortened fire return intervals occur, sagebrush steppe cannot persist. In contrast, non-native annual grasses can recover to prefire amounts within a few years after burning, producing fuelbeds that set the stage for recurrent fire (Brooks and Pyke 2001). The positive grass/fire cycle (sensu DAntonio and Vitousek 1992) often leads to type-conversion of native sagebrush steppe to non-native annual grassland, a phenomenon that has been documented in the Great Basin since the 1930s (Pickford 1932, Piemeisel 1951, Young and Evans 1978, Whisenant 1990). Vegetation type-conversions associated with altered fire regimes can have effects that resonate to higher trophic levels and throughout ecosystems, and are very costly to reverse (Brooks et al. 2004). Management of the highly flammable fuelbeds created by non-native annual grasses is a necessary first step to break the grass/fire cycle and restore native sagebrush steppe vegetation (Brooks et al. 2004). |
| 英文关键词 | Cheatgrass Burned sagebrush steppe Postfire seeding Effectiveness NMon-native grasses Fire return intervals |
| 出版年 | 2005 |
| 语种 | 英语 |
| 国家 | United States |
| URL | http://r.cnki.net/KCMS/detail/detail.aspx?DbCode=KJBG&dbname=KJBGW&filename=5a00178a31c97d1c38961222 |
| 来源机构 | Forest Service Rocky Mountain Forest and Range EXP |
| 资源类型 | 科技报告 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/273377 |
| 推荐引用方式 GB/T 7714 | [unavailable]. Effectiveness of Postfire Seeding to Reduce Cheatgrass (Bromus tectorum) Growth and Reproduction in Recently Burned Sagebrush Steppe.,2005. |
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