...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecosphere >Temporal variability in large grazer space use in an experimental landscape
【24h】

Temporal variability in large grazer space use in an experimental landscape

机译：实验性景观中大型放牧器空间使用中的时间变化

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Land use, climate change, and their interaction each have great potential to affect grazing systems. With anticipated more frequent and extensive future drought, a more complete understanding of the mechanisms that determine large grazer landscape‐level distribution under varying climatic conditions is integral to ecosystem management. Using an experimental setting with contrasting fire treatments, we describe the inter‐annual variability of the effect of landscape topography and disturbance from prescribed spring fire on large grazer space use in years of variable resource availability. Using GPS telemetry, we investigated space use of plains bison (Bison bison bison ) as they moved among watersheds managed with variable experimental burn treatments (1‐, 2‐, 4‐, and 20‐year burn intervals) during a seven‐year period spanning years of average‐to‐above average forage production and severe drought. At the landscape scale, bison more strongly favored high‐elevation and recently burned watersheds with watersheds burned for the first time in 2 or 4?yr consistently showing higher use relative to annually burned watersheds. In particular, watersheds burned for the first time in 4?yr were avoided to lesser extent than other more frequently burned watersheds during the dormant season. This management type also maintained coupling between bison space use and post‐fire regrowth across post‐drought growing season months, whereas watersheds with more frequent fire‐return intervals attracted bison in only the first month post‐fire. Hence, fire frequency played a role in maintaining the coupling of grazer and post‐fire regrowth, the fire–grazer interaction, in response to drought‐induced reduction in fuel loads. Moreover, bison avoided upland habitat in poor forage production years, when forage regrowth is less likely to occur in upland than in lowland habitats. Such quantified responses of bison to landscape features can aid future conservation management efforts and planning to sustain fire–grazer interactions and resulting spatial heterogeneity in grassland ecosystems.
机译：土地利用，气候变化及其相互作用都具有极大的潜力影响放牧系统。由于预期未来将发生更频繁和更广泛的干旱，因此对于确定在不同气候条件下大型食草动物的景观水平分布的机制的更完整的理解是生态系统管理不可或缺的。通过对比火处理的实验环境，我们描述了在资源可变的情况下，景观地形和规定的春季火灾对大型放牧者空间使用的干扰的年际变化。使用GPS遥测技术，我们研究了平原野牛（ Bison野牛野牛）在七个可变试验燃烧处理（1、2、4、20和20年烧制间隔）管理的流域之间移动时的空间使用情况跨越多年平均牧草产量和严重干旱的年份。在景观尺度上，野牛更倾向于高海拔和最近被烧过的流域，而在第二或第四年首次烧过的流域相对于每年被烧过的流域始终显示出更高的利用率。特别是，在休眠季节，避免了在4年内首次燃烧的流域，其程度要小于其他较频繁燃烧的流域。这种管理类型还在干旱后生长季节的几个月中保持了野牛的空间利用与火灾后的再生之间的耦合，而具有更频繁回火间隔的集水区仅在火灾后的第一个月就吸引了野牛。因此，响应干旱引起的燃料负荷减少，火灾频率在维持放牧者与火灾后再生长（火灾与放牧者的相互作用）的耦合中发挥了作用。此外，野牛避免了在草料生产不良的年份中的高地栖息地，因为与低地栖息地相比，高地草食再生的可能性较小。野牛对景观特征的这种量化响应可以帮助未来的保护管理工作和规划，以维持火草之间的相互作用以及由此造成的草地生态系统空间异质性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号