Investigating The Distribution Patterns Of Three Species...

Biology 2.6 Achievement Standard 91158 Cellana Denticulata, Chamaesipho Columna and Chamaesipho Brunnea are three species living in the intertidal zone of the rocky shore. I am investigating the distribution pattern of these three species and the factors affecting the zonation pattern of these organisms. The aim of the investigation was to analyse and compare the distribution of the separate species, regarding the adaptations and the intraspecific and interspecific interactions- whether being competitive, cooperative or exploitative. The investigation took place at Sirens Rocks. (see photo right) The distribution of these species are affected by abiotic and biotic factors of which limit the upper vertical and lower vertical limit that the three organisms can endure, thus providing a fundamental niche where the organisms inhabit. The ecological pattern presented at the location of Sirens Rocks is Zonation, which is a community pattern, showing visual bands or zones of which is created by the varying tolerance to different abiotic factors and biotic factors. The observable community pattern of zonation, not taken from the given location of sirens rocks. Cellana Denticulata (denticulate limpets) Cellana denticulate, with results taken from Sirens Rocks, was found to inhabit mainly the mid tide zone, mainly on open surfaces regardless of the aspect if the substrate. The mid tide zone is completely submerged by water on average twice a day leaving theShow MoreRelatedVertical Zonation and the Rocky Shore3475 Words   |  14 Pages Vertical Zonation and the Rocky Shore According to Yonge (1949), â€Å"the zoning of both plants and animals within the narrow vertical limits of a rocky shore is one of the most striking features about shore life.† It is noticeable particularly where sessile organisms (such as barnacles) occur in abundance on the boundaries of their vertical distribution, as they form a conspicuous line (Boaden Seed, 1985). The author has also been particularly impressed by clear zonation patterns of brown algae