• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Conservation Biology >The role of time and species identities in spatial patterns of species richness and conservation
【24h】

The role of time and species identities in spatial patterns of species richness and conservation

机译：时间和物种身份在物种丰富和保护的空间格局中的作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Many conservation actions are justified on the basis of managing biodiversity. Biodiversity, in terms of species richness, is largely the product of rare species. This is problematic because the intensity of sampling needed to characterize communities and patterns of rarity or to justify the use of surrogates has biased sampling in favor of space over time. However, environmental fluctuations interacting with community dynamics lead to temporal variations in where and when species occur, potentially affecting conservation planning by generating uncertainty about results of species distribution modeling (including range determinations), selection of surrogates for biodiversity, and the proportion of biodiversity composed of rare species. To have confidence in the evidence base for conservation actions, one must consider whether temporal replication is necessary to produce broad inferences. Using approximately 20 years of macrofaunal data from tidal flats in 2 harbors, we explored variation in the identity of rare, common, restricted range, and widespread species over time and space. Over time, rare taxa were more likely to increase in abundance or occurrence than to remain rare or disappear and to exhibit temporal patterns in their occurrence. Space-time congruency in ranges (i.e., spatially widespread taxa were also temporally widespread) was observed only where samples were collected across an environmental gradient. Fifteen percent of the taxa in both harbors changed over time from having spatially restricted ranges to having widespread ranges. Our findings suggest that rare species can provide stability against environmental change, because the majority of species were not random transients, but that selection of biodiversity surrogates requires temporal validation. Rarity needs to be considered both spatially and temporally, as species that occur randomly over time are likely to play a different role in ecosystem functioning than those exhibiting temporal structure (e.g., seasonality). Moreover, temporal structure offers the opportunity to place management and conservation activities within windows of maximum opportunity.
机译：在保护生物多样性的基础上，许多保护行动是合理的。就物种丰富度而言，生物多样性主要是稀有物种的产物。这是有问题的，因为表征社区和稀有模式或证明使用替代物所需的采样强度使采样随时间推移而偏向于空间。但是，环境波动与社区动态相互作用会导致物种发生的时间和地点的时间变化，通过产生关于物种分布建模结果（包括范围确定），生物多样性替代物的选择以及生物多样性构成比例的不确定性，潜在地影响保护规划。稀有物种。为了对保护行动的证据基础充满信心，必须考虑是否需要时间重复才能产生广泛的推论。利用来自两个港口的潮汐平地的大约20年的宏观动物数据，我们研究了随时间和空间变化的稀有，常见，限制范围和广泛物种的身份变化。随着时间的流逝，稀有分类单元的丰度或发生率增加的可能性要大于保持稀有或消失并在发生时表现出时间规律的可能性。仅在通过环境梯度收集样本的地方才观察到范围内的时空一致性（即，在空间上广泛分布的分类单元也在时间上广泛分布）。随着时间的推移，两个港口中有15％的分类单元从空间受限的范围更改为范围广泛的范围。我们的发现表明，稀有物种可以提供抵抗环境变化的稳定性，因为大多数物种不是随机的瞬态现象，但是选择生物多样性替代物需要时间验证。需要在空间和时间上都考虑到稀有度，因为随时间推移随机出现的物种在生态系统功能中的作用可能与那些表现出时间结构（例如季节性）的物种不同。此外，时间结构提供了将管理和保护活动置于最大机会窗口内的机会。

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