Diversity of gastropods at Pudhumadam coast region and unusual occurrence of Tetraclita rubescens on conus shell

The marine environment is continuously subjected to chemical pollution, which may exert a detrimental effect on aquatic organisms. Biodiversity of marine invertebrates has been proven to be difficult to assess accurately using traditional morphological methods. Major problems include dearth of characters in many taxa. Hence, it is necessary to assess the eco-health of this marine invertebrate using reliable measurements of environmental quality as required in the present study. With the backdrop of information, the Pudhumadam coastal area was surveyed for the diversity of ruined/washed out gastropods species. As a competitor for space with gastropods, these barnacles settle on the conus for its food and habitat. In our study, the occurrence of acorn barnacles was observed on gastropod shells. The pink adult and many white small barnacles were noted on the shells. If these barnacles increase their habitat this may lead to destruction of diversity of gastropods.     

盐度对海洋污损动物藤壶附着红树幼林的影响

于2005年4月和5月研究了厦门海沧吴冠滩涂人工红树林种植区秋茄幼林上藤壶分布的特征。结果表明:(1)秋茄幼林植株上附生有藤壶4种,分别是:纹藤壶(Balanus amphitrite amphitrite)、白脊藤壶(B．albicostatus)、白条地藤壶(Chthamalus withersi)和网纹藤壶(B．reticulates)。其中纹藤壶、白条地藤壶为主要种。(2)藤壶的空间分布格局总体上为聚集分布。分布型随所处位置海水的盐度变化而变化。平均盐度超过19的潮滩上藤壶危害明显加重,影响了秋茄幼苗的正常生长。