辽河口红海滩天津厚蟹种群时空分布特征研究

红海滩是辽河口重要的旅游资源，由翅碱蓬（Suaeda heteroptera）群落集群生长而成，然近年明显退化。初步调查发现天津厚蟹（Helice tientsinensis）摄食可显著影响翅碱蓬萌发和生长，故探究天津厚蟹的分布特征对阐明红海滩退化具有重要意义。本研究通过陷阱捕获法，对辽河口红海滩的天津厚蟹时空分布特征进行了调查。研究结果表明:天津厚蟹密度具有差异显著的月动态变化特征，表现为7月> 8月> 6月> 9月> 10月> 5月> 11月；随着从近岸潮沟向入海口靠近，天津厚蟹分布密度具有逐渐降低的趋势；受食物来源与天敌庇护场所影响，天津厚蟹在不同植被生境中的分布密度为:翅碱蓬-芦苇生态交错区>芦苇群落>翅碱蓬群落>光滩-翅碱蓬生态交错区>光滩。本研究为辽河口红海滩湿地资源的保护与管理提供了数据支持。

Research on the temporal and spatial distribution characteristics of Helice tientsinensis in Red Beach of the Liaohe estuary

Red Beach, one important tourist resource in the coastal area of Panjin, Liaoning province, is composed by Suaeda heteroptera community.However, the red beach has degradated severely in recent years.Our preliminary results have found that the crab consumption (mainly by Helice tientsinensis) of Suaeda heteroptera is a great driving force in limiting the germination and growth of Suaeda heteroptera.So it is important to find out the distribution characteristics of Helice tientsinensis in coastal areas of Liaohe estuary for the conservation and restoration of Red Beach.In our present research, we studied the temporal and spatial distribution of Helice tientsinensis in Red Beach by pitfall trap method.The results demonstrate that the density of Helice tientsinensis is significantly monthly dynamic, which shows Jul. > Aug. > Jun. > Sept. > Oct. > May. > Nov.Moreover, the density of Helice tientsinensis decreases significantly when it is close to the estuary.We also found that the density of Helice tientsinensis is confined by different habitats.The density in habitats is:Suaeda-Phragmites ecotone > Phragmites community > Suaeda community > Suaeda-mudflat ecotone > mudflat.In this paper, the temporal and spatial distribution of Helice tientsinensis was investigated and analyzed to provide supports for Red Beach conservation and management.