践踏对黄海中部沙滩草本群落的影响

Effects of human trampling on sand-beach grass communities of the middle Yellow Sea

在黄海沙滩,天然分布着珊瑚菜、单叶蔓荆等重要经济植物的野生种群。由于砂质海湾是良好的海水浴场,每年夏季游客会给沙滩植物带来过度践踏。以青岛仰口沙滩为例,研究了游客践踏对沙滩草本群落的影响。结果表明,各种沙滩植物对践踏的忍耐性是不同的,珊瑚菜、粗毛鸭嘴草和猪毛菜等不能忍耐践踏,践踏不仅导致草本群落总盖度的降低,还导致物种丰富度的降低。

There are some wild plants with high values （e.g.Glehnia littoralis and Vitex trifolia） on the sand-beaches of the middle Yellow Sea.The bays connected to the sand-beaches are suitable for swimming and tourism.Every summer,people gather there,causing heavy trampling on the plants.A case study on a sand-beach in Qingdao was conducted to ascertain the effect of human trampling on these plants.The tolerance of the plants to trampling differed：The species G.littoralis,Ischaemum bartatum and Salsola komarovii had the least to tolerance to trampling.Trampling led not only to a reduced grass coverage,but also to a reduction of species richness.