• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Continental Shelf Research: A Companion Journal to Deep-Sea Research and Progress in Oceanography >Spatial variability in community structure of Dictyoceratida sponges across Torres Strait, Australia
【24h】

Spatial variability in community structure of Dictyoceratida sponges across Torres Strait, Australia

机译：澳大利亚托雷斯海峡两岸海绵藻群落结构的空间变异性

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

Spatial variability in community structure of dictyoceratid sponges (class Demospongiae; order Dictyoceratida) was examined on coral reefs in Torres Strait, an archipelago of islands and reefs between northern Queensland. Australia, and Papua New Guinea. Dictyoceratid sponge abundances and environmental factors were recorded at four locations, separated by 50-220 km. Each location was subdivided into 5-7 sites, each >= 2 km apart. At each site, four 50 x 2 m belt transects were quantitatively surveyed, recording the dictyoceratid numbers, substrate type (rock, rubble and sand), water clarity, degree of reef slope and depth. Dictyoceratid abundance was similar among locations over large spatial scales, averaging 15.5 individuals per 100 m(2), but varied significantly among sites within particular locations (i.e. small scale heterogeneity). Twenty-three dictyoceratid species were recorded in Torres Strait, with approximately half(12/23) found in only one location. The canonical correspondence analysis determined that the measured environmental factors explained only 26% of the spatial variation. Cluster analysis revealed a complex dictyoceratid community structure with similarities among neighbouring sites and among sites separated by hundreds of kilometres. Conversely the abundance and composition of dictyoceratids could vary greatly between neighbouring sites 2 km apart and on the same reef complex. The results of this study suggest that spatial variability of dictyoceratid sponges in Torres Strait is influenced by a combination of environmental, biological and stochastic processes. (c) 2008 Elsevier Ltd. All rights reserved.
机译：在昆士兰州北部岛屿和珊瑚礁群岛的托雷斯海峡的珊瑚礁上，研究了盘尾海绵（Demospongiae; Dictyoceratida目）群落结构的空间变异性。澳大利亚和巴布亚新几内亚。记录了在四个位置相距50-220 km的梭菌海绵的丰度和环境因素。每个位置都细分为5-7个站点，每个站点 2 km。在每个地点，对4个50 x 2 m的带状断面进行了定量调查，记录了单节律数，基质类型（岩石，瓦砾和沙子），水的透明度，礁石倾斜度和深度。大空间尺度上位置之间的盘尾藻丰度相似，每100 m（2）平均有15.5个个体，但在特定位置内的站点之间差异很大（即小规模异质性）。托雷斯海峡记录了二十三种单壳纲物种，仅在一个位置发现了一半（12/23）。规范的对应分析确定，测得的环境因素仅解释了空间变化的26％。聚类分析揭示了一个复杂的盘尾虫群落结构，相邻站点之间以及相距数百公里的站点之间具有相似性。相反，单壳纲的丰度和组成在相距2 km的相邻地点和同一礁石群上可能有很大差异。这项研究的结果表明，托雷斯海峡的双侧柏海绵的空间变异性受环境，生物和随机过程的综合影响。 （c）2008 Elsevier Ltd.保留所有权利。

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