Epi- and endobiont faunal communities on an Egyptian Mediterranean rocky shore: species composition and their competition for space

作     者：Magdy EL HEDENY Mohamed RASHWAN Sebastián RICHIANO Saleh AL FARRAJ Ghada AL BASHER Magdy EL HEDENY;Mohamed RASHWAN;Sebastián RICHIANO;Saleh AL FARRAJ;Ghada AL BASHER

作者机构：Department of GeologyFaculty of ScienceAlexandria UniversityAlexandria 21568Egypt Department of Biological and Geological SciencesFaculty of EducationAlexandria UniversityAlexandria 14037Egypt Instituto Patagónico de Geología y Paleontología(CONICET-CENPAT)Puerto Madryn 9120Argentina Department of ZoologyCollege of SciencesKing Saud UniversityP.O.Box 2455Riyadh 11451Saudi Arabia 

出 版 物：《Journal of Oceanology and Limnology》 (海洋湖沼学报（英文）)

年 卷 期：2021年第39卷第1期

页      面：198-207页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 0908[农学-水产] 0707[理学-海洋科学] 0815[工学-水利工程] 0713[理学-生态学] 

基　　金：Supported by the Researchers Supporting Project(No.RSP-2019/7) King Saud University。 

主　　题：sclerobionts encrustation bioerosion Mediterranean Egypt 

摘      要：The exposed calcareous rocky area of the Abu Qir Headland,east of Alexandria,Egypt which range from coarse grains,through pebbles,cobbles,and boulders to rocky platforms,was signifi cantly colonized by sclerobionts(epibionts and endobionts).The epibiont species diversity was comparatively higher than that of endobionts.Epibiont communities included bryozoans(the anascan-grade cheilostome Bifl ustra savartii),serpulid(Hydroides elegans,Spirobranchus cf.tetraceros,Vermiliopsis striaticeps and Protula or Apomatus)and spirorbid(Spirorbis)wormtubes,and balanoid barnacles(Amphibalanus amphitrite,Balanus trigonus,and Perforatus perforatus).The cheilostome bryozoan colonies,which developed extensive sheets,proliferated on the study rocky shore either encrusting the bioeroded basement directly,or encrusting other epilithic taxa,particularly balanoid barnacles and serpulid worms.Encrusters displayed a remarkable marginal competitive interaction(overgrowth and stand-off)for space on the study rocky shore.On the other hand,endobionts were not well represented on the studied rocky shore exposure.It was possible to identify three ichnotaxa:Gastrochaenolites,Maeandropolydora,and Finichnus.The fi ndings documented represent a signifi cant contribution to our knowledge of sclerobionts composition,sequence of their colonization and/or bioerosion,and their mutual relationships on the intertidal rocky shore of the Abu Qir Headland.