中文摘要：

海草是一类由陆生植物演化并适应海洋环境的沉水植物,其具有重要的生态学意义和经济价值。2008年7月,对山东近岸海域海草的种类进行了初步调查,描述了分布于山东近岸海域海草的形态学特征,并分析了山东近岸海域海草资源的现状及退化原因。调查共发现海草种类4种,分别为大叶藻（Zostera marina L.）、丛生大叶藻（Zostera caespitosa Miki）、红须根虾形藻（Phyllospadixi watensis Makino）及黑须根虾形藻（Phyllospadix japonicus Makino）。调查结果为进一步开展海草资源调查,恢复受损海草生物群落提供参考。

英文摘要：

Seagrasses are a type of submerged aquatic vegetation which have evolved from terrestrial plants and have become specialized to live in the marine environment.Seagrasses perform a variety of functions within ecosystems,and have both economic and ecological value.Preliminary survey for seagrass species was performed in inshore areas of Shandong province in July 2008.In the meantime,morphological characteristics of seagrasses distributing in inshore areas of Shandong province were described.Also,status and degeneration causes of seagrass resources in inshore areas of Shandong province were analyzed.Four species of seagrasses including Zostera marina L.,Zostera caespitosa Miki,Phyllospadix iwatensis Makino,and Phyllospadix japonicus were found during the present investigation.The results in the present research will provide data for further resources investigation and restoration of injured biotic community of seagrasses.