游憩活动对马銮湾风景区大型底栖动物分布的影响

采用样地调查法于2012年7月对马銮湾沙滩潮间带大型底栖动物采样分析，根据游憩资源开发的程度及游憩人数，将研究区域分为重度游憩利用区与轻度游憩利用区。结果表明：马銮湾重度游憩利用区与轻度游憩利用区采样的大型底栖动物种类都为4种，其中环节动物1种（长吻吻沙蚕（Glycera chirori））、节肢动物1种（弯螯活额寄居蟹（Diogenes deflectomanus））、软体动物2种（斧蛤（Donax variabilis）、鲳螺（Umbonium vestiarium））。受游憩活动的影响，游憩强度越大，大型底栖动物的栖息密度和生物量就越小；轻度游憩利用区中低潮区大型底栖动物的栖息密度和生物量均高于重度游憩利用区；从垂直分布看，大型底栖动物的栖息密度及生物量从中潮区至低潮区呈下降趋势；两个区域的栖息密度和生物量差异不显著。分析认为，游憩干扰是造成沙滩大型底栖动物数量变化的主要原因。

Influences of Distribution of Macrobenthos Recreational Activities in Intertidal Beach in Dongshan Island

In July 2012, according to the degree and the number of recreational resources development, the study area was divided into heavy recreation use area and mild recreation use area, which analyzed intertidal beach macrobenthos in Forward bay by sample plot survey method. Results showed that both of macrobenthos species sampling from heavy recreation use area and mild recreation use area are four kinds, one kind of Annulata （Glycera Chirori）, one kind of Arthropod （Diogenes Deflectomanus）, two kinds of Mollusc （Donax Variabilis and Umbonium Vestiarium）. Influenced by recreational activities, the greater recreational activities, the smaller macrobenthos inhabit density and biomass. Density and biomass from mild recreation use area were smaller than from heavy recreation use area. From the vertical distribution, macrobenthos density and biomass was on the decline from tide area to low water area, the difference of density and biomass from these two areas was not significant. Analysts showed that recreation interference was the main cause of the quantity changed of sand macrobenthos.