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Sagebrush-steppe vegetation dynamics and restoration potential in the interior Columbia Basin, USA

机译：美国哥伦比亚盆地内部的鼠尾草-草原植被动态和恢复潜力

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We modeled the dynamics and restoration of sagebrush (Artemisia spp.) habitats for Greater Sage-Grouse (Centrocercus urophasianus) in the interior Columbia Basin and adjacent portions of the Great Basin (referred to as the basin). Greater Sage-Grouse have undergone widespread decline and are the focus of conservation on over 13 million ha of sagebrush steppe in the basin, much of which is managed by the U.S. Forest Service (FS) and U.S. Bureau of Land Management (BLM ). Consequently, we evaluated changes in the amount and quality of sage-grouse habitat on 8.1 million ha of FS-BLM lands in the basin. Changes were estimated from historical to current conditions and from current conditions to those projected 100 years in the future under proposed management and under two restoration scenarios. These two scenarios were designed to improve long-term (100-year) projections of sage-grouse habitat on FS-BLM lands in relation to current conditions and proposed management. Scenario 1 assumed a 50% reduction in detrimental grazing effects by livestock (through changes in stocking rates and grazing systems) and a six-fold increase in areas treated with active restoration relative to proposed management. Scenario 2 assumed a 100% reduction in detrimental grazing effects and the same level of active restoration as scenario 1. Under the two scenarios, the amount of FS-BLM habitat for sage grouse within treated areas declined by 17-19% 100 years in the future compared with the current period, but was 10-14% higher than the 100-year projection under proposed management. Habitat quality under both scenarios was substantially improved compared with the current period and proposed management. Our results suggest that aggressive restoration could slow the rate of sagebrush loss and improve the quality of remaining habitat. [References: 31]
机译：我们模拟了内部哥伦比亚盆地和大盆地（称为盆地）附近大鼠尾草（Centrocercus urophasianus）的鼠尾草（蒿属）栖息地的动态和恢复。鼠尾草的大面积衰退已经成为流域内超过1300万公顷的鼠尾草草原的保护重点，其中大部分由美国森林服务局（FS）和美国土地管理局（BLM）管理。因此，我们评估了流域810万公顷FS-BLM土地上鼠尾草栖息地的数量和质量的变化。在提议的管理和两种恢复方案下，估计了从历史状态到当前状态的变化，以及从当前状态到未来100年预计的变化。设计这两种方案是为了相对于当前状况和拟议的管理改进FS-BLM土地上鼠尾草栖息地的长期（100年）预测。方案1假设牲畜的有害放牧影响减少了50％（通过改变放牧率和放牧系统），并且与拟议的管理相比，采用主动恢复处理的面积增加了6倍。方案2假定有害放牧效应降低了100％，主动恢复水平与方案1相同。在两种方案中，治疗区内用于鼠尾草的FS-BLM生境数量在100年内下降了17-19％。与当前期相比，但比拟议管理下的100年预测高出10-14％。与当前时期和拟议管理相比，两种情况下的生境质量均得到了显着改善。我们的结果表明，积极的恢复可以减缓鼠尾草损失的速度并改善剩余生境的质量。 [参考：31]

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