• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology >Anthropogenic factors and habitat complexity influence biodiversity but wave exposure drives species turnover of a subtropical rocky inter-tidal metacommunity
【24h】

Anthropogenic factors and habitat complexity influence biodiversity but wave exposure drives species turnover of a subtropical rocky inter-tidal metacommunity

机译：人为因素和栖息地复杂性影响生物多样性，但波浪暴露驱动亚热带岩石间潮间带群落的物种更新

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

Coastal ecosystems are complex and species rich, but are vulnerable to degradation from a variety of anthropogenic activities. Nevertheless, information on inter-tidal community composition in the Caribbean Basin and at other oceanic sites is lacking. Such information is essential to developing a more comprehensive understanding of rocky inter-tidal systems and their responses to global change. The goals of this study were to determine the relative importance of environmental (wave power density, wave height), habitat (e.g. algal cover, slope, complexity of rock surfaces) and anthropogenic (distance to roads, population density) factors associated with the structure of local assemblages at multiple shore heights and the regional metacommunity of mobile invertebrates on oceanic rocky inter-tidal habitats. Environmental characteristics associated with habitat complexity (algal cover, rock surface complexity) and human population density were most strongly associated with abundance and biodiversity of invertebrates. Species richness was positively correlated with surface complexity, but abundance was negatively correlated with both surface complexity and per cent algal cover. By contrast, abundance of invertebrates was positively correlated with human population density, and diversity was negatively correlated with human population density. Abundance of invertebrates was greatest in the mid inter-tidal zone, whereas diversity was greatest in the lower inter-tidal zone. Metacommunity structure was Gleasonian, but the gradient along which species turnover occurred was correlated with measures of wave exposure, rather than anthropogenic activity. Unlike in previous studies, mostly at mainland sites, human activity primarily altered dominance patterns of communities, while having relatively little effect on species richness or composition.
机译：沿海生态系统复杂且物种丰富，但容易因各种人为活动而退化。然而，缺乏关于加勒比海盆地和其他海洋地点的潮间带群落组成的信息。这些信息对于发展对岩石潮间带系统及其对全球变化的响应的更全面的了解至关重要。这项研究的目的是确定与结构相关的环境（波浪功率密度，波浪高度），栖息地（例如藻类覆盖，坡度，岩石表面的复杂性）和人为因素（距道路的距离，人口密度）的相对重要性海洋多岩石潮间生境中多个海岸高处的局部集合和活动无脊椎动物的区域性亚群落。与栖息地复杂性（藻类覆盖，岩石表面复杂性）和人口密度相关的环境特征与无脊椎动物的丰度和生物多样性密切相关。物种丰富度与表面复杂度呈正相关，但丰富度与表面复杂度和藻类覆盖率呈负相关。相比之下，无脊椎动物的丰富度与人口密度呈正相关，而多样性与人口密度则呈负相关。在潮间带中段，无脊椎动物的丰度最大，而在潮间带下层，多样性最大。元社区结构是格里森式的，但物种更新发生的梯度与波浪暴露的量度有关，而不是与人为活动有关。与以前的研究不同，人类活动主要在大陆地区进行，主要改变了社区的优势模式，而对物种丰富度或组成的影响相对较小。

著录项

相似文献

  • 外文文献
  • 中文文献
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