Epibiont communities of loggerhead marine turtles (Caretta caretta) in the western Mediterranean: influence of geographic and ecological factors
Epibiont communities of loggerhead marine turtles (Caretta caretta) in the western Mediterranean: influence of geographic and ecological factors
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DOI：
10.1017/s0025315414001520
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发表时间：
2015-06-01
影响因子：
1.2
通讯作者：
Aznar, F. J.
中科院分区：
文献类型：
--
作者：
Domenech, F.;Badillo, F. J.;Aznar, F. J.
本研究报告的第一次在整个表生动物区系的红海龟，Caretta caretta，在地中海西部，分析的因素，占组合的可预测性和组成。在1995-2006年期间，对沿着西班牙东部海岸搁浅的104只红海龟进行了调查。共鉴定出39种表生生物类群，其中3种为红海龟的新记录：Bittium sp.，Idotea metallica和Jassa sp.该组合由27个兼性类群组成，这些类群使用海龟作为任何无生命的浮力基质，12个类群与海龟有更具体的联系，包括6个只发生在海龟身上的物种，2个也居住在其他宿主身上，还有四种也能以自由生活的形式生存，但与海龟有着密切的联系。基于9项现有调查中166个表生体分类群的发生进行的层次聚类和相似性剖面分析表明，地中海西部（WM）红海龟的表生体组合与地中海中部（CM）的相似，但与东地中海和大西洋调查的海龟有显着差异。发生在WM和CM海龟的表生生物的子集是由地理因素（专属地中海表生生物类群）和生态因素（相对缺乏的滨海底栖类群）的组合定义。从WM和CM的红海龟显然利用浮游和底栖栖息地以类似的方式，代表一个均匀的单位epibiont招聘。
This study reports for the first time on the whole epibiont fauna of loggerhead marine turtles, Caretta caretta, in the western Mediterranean, analysing the factors that account for the predictability and composition of the assemblage. A total of 104 loggerhead turtles stranded along the coasts of eastern Spain during 1995-2006 were surveyed for epibionts. A total of 39 epibiont taxa were identified, three of them being new records for loggerhead turtles: Bittium sp., Idotea metallica and Jassa sp. The assemblage was composed of a group of 27 facultative taxa that use turtles as any inanimate buoyant substrate, and 12 taxa that have developed more specific associations to marine turtles, including six species that occur in marine turtles exclusively, two that dwell also on other hosts, and four that can also survive as free-living forms but have developed a strong association with marine turtles. Hierarchical clustering and Similarity Profile Analysis based on the occurrence of 166 epibiont taxa from nine available surveys indicated that the epibiont assemblages from loggerhead turtles in the western Mediterranean (WM) are similar to those from Central Mediterranean (CM), but significantly different from turtles surveyed in the eastern Mediterranean and the Atlantic. The subset of epibionts occurring on WM and CM turtles is defined by a combination of geographic factors (exclusive Mediterranean epibiont taxa) and ecological factors (relative absence of littoral-benthic taxa). Loggerhead turtles from WM and CM apparently exploit both pelagic and benthic habitats in similar fashion, representing a homogeneous unit for epibiont recruitment.