Using resistance and resilience concepts to reduce impacts of invasive annual grasses and altered fire regimes on the sagebrush ecosystem and greater sage-grouse: A strategic multi-scale approach.
Recovery efforts for threatened and endangered species often must be initiated with incomplete data. The outcomes of such efforts are difficult to predict, which makes monitoring the progress of recovery efforts an integral part of the recovery process. We evaluated the role of monitoring in recovery plans for 181 species listed as threatened and endangered under the U.S. Endangered Species Act. We considered both the extent to which monitoring tasks were proposed as part of the recovery effort and the extent to which the tasks proposed were actually implemented. In general, tasks devoted to tracking the species' population trend were more likely to be proposed and implemented than were other monitoring activities (e.g., those devoted to the species' demographics, its habitat requirements, or the impact of predators, competitors, and exotics). We found that the extent and nature of the monitoring proposed and implemented appeared to reflect taxonomic biases that exist throughout the recovery process and were little influenced either by the level of understanding of the species' biology or by the recovery priority assigned to the species. In particular, monitoring efforts did not adequately address the specific threats affecting species. Proposals for, and implementation of, monitoring progress toward recovery goals were independent of the type of criteria defined in the plans (e.g., population level and habitat extent), although population‐related criteria were disproportionately common. Based on these findings, we caution against an overemphasis on focal species monitoring, especially when such an emphasis leads to the reduction or exclusion of other types of monitoring. We also recommend that species‐specific attributes factor more prominently in the development of monitoring to avoid monitoring action that is otherwise unnecessary.
The recovery of threatened and endangered species is complicated by the number, severity, and tractability of the threats facing each species. We investigated the nature and the treatment of threats in recovery plans for 181 threatened and endangered species. We examined the types of threats facing species, as well as the degree to which threats were understood and addressed. We found that >85% of all species faced at least four out of nine distinct types of threats. The most common threats were those related to resource use, exotic species, construction, and the alteration of habitat dynamics. Recovery plans lacked basic information about the magnitude, timing, frequency, or severity of 39% of all threats facing the 181 species. Likewise, 37% of all threats were not directly addressed with recovery tasks. Threats from pollution were more poorly understood than other threats, and threats from exotics were better addressed than other types of threats. Finally, we found that threats that were better understood were assigned recovery tasks more often than threats that were more poorly understood. Thus our results suggest that a lack of basic understanding of the nature of the threats facing threatened and endangered species may, in part, be undermining our recovery efforts.
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