...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology progress series >Macrofaunal diversity and community structure of the DeSoto Canyon and adjacent slope
【24h】

Macrofaunal diversity and community structure of the DeSoto Canyon and adjacent slope

机译：Desoto峡谷和邻近坡度的宏指令多样性和社区结构

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

Northern Gulf of Mexico canyons are centers of organic matter accumulation and biodiversity, but studies of their finer-scale (sub-100 km) ecological patterns are scarce. Detailed sampling of macrofauna within the DeSoto Canyon was undertaken along 3 depth transects on the canyon wall, axis, and adjacent slope. Sediment, terrain, and water mass parameters were also compiled for the same stations. Within the canyon, macrofaunal abundance decreased, evenness increased, and richness followed the expected parabolic curve with depth, peaking at 1100 m. Cluster analysis identified 3 canyon depth groups that conformed to established bathymetric boundaries for the non-canyon Gulf of Mexico slope: Group I at 500 m, Group II at 669-1834 m, and Group III at 2000 m. Explanatory environmental models indicate that canyon community structure was strongly correlated with oxygen concentration and fluorescence, with a weaker potential influence from any of salinity, particulate organic carbon, sediment organic carbon, or slope. Comparisons of the habitats indicated that abundances were highest on the canyon wall. Slope community structure differed from that of either of the canyon habitats. Environmental models consisted of single variables including oxygen concentration, sediment organic carbon, slope, and temperature with similar explanatory values. Community differences within the canyon and between the canyon and adjoining slope contradict previous findings of a single faunal zone for the whole study area. Factors that may contribute to inter-habitat heterogeneity include potential hydrocarbon seepage, organically enriched sediment deposits along channels, or remnant influence from the Deepwater Horizon spill, warranting more research into this dynamic ecosystem.
机译：墨西哥峡谷峡谷是有机物积累和生物多样性的中心，但研究其更精细的（100公里）生态模式是稀缺的。 Desoto Canyon内的Macrofauna的详细取样沿峡谷墙壁，轴和相邻坡度的3个深度横断面进行。还为同一站编制了沉积物，地形和水质参数。在峡谷内，大型大量减少，均匀性增加，丰富的曲折伴随着预期的抛物线曲线深度，1100米处达到峰值。聚类分析确定了3个峡谷深度组，符合墨西哥斜坡非峡谷湾的建立的碱基界限：I在＆ 500米，II组，669-1834米，第III族及其＆GT; 2000米。解释性环境模型表明峡谷群落结构与氧浓度和荧光强烈相关，盐度，颗粒状有机碳，沉积物有机碳或坡度的任何潜在影响。栖息地的比较表明，峡谷墙上的丰富是最高的。坡度社区结构与任何一个峡谷栖息地不同。环境模型包括单个变量，包括氧气浓度，沉积物有机碳，斜率和温度，具有类似的解释值。峡谷内部和峡谷与毗邻坡之间的社区差异与整个研究区的单一动物区的先前发现。可能导致栖息地异质性的因素包括潜在的碳氢化合物渗流，沿着通道的有机富集的沉积物沉积物，或者从深水地平线泄漏的残余影响，保证更有研究这种动态生态系统。

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