常绿阔叶林下石生藓类对森林植被发育的影响

摘要/Abstract

摘要： 为探讨石生藓类在森林植被稳定性、完整性维持中的作用,分析了浙江龙王山常绿阔叶林5种异质性生境缀块中石生藓藓丛维管植物的分布格局.结果表明,藓丛维管植物组成及分布受藓丛生长态势、蓄土持水能力及生境干扰程度等众多因子的综合影响.缀块1、5原生生境保持较好,藓丛平均厚度、干重、最大持水量、蓄土量以及土壤自然吸湿率等显著高于遭受不同程度干扰的缀块2、3、4,如藓丛平均厚度排序为缀块5(2.2cm)>缀块1(2.0cm)>缀块2(1.5cm)>缀块3(1.1cm)>缀块4(0.9cm),藓丛维管植物种数排序为缀块5(16)>缀块1(14)>缀块3(9)>缀块2(8)>缀块4(7),藓丛维管植物盖度排序为缀块3(30.0%)>缀块1(28.5%)>缀块5(26.5%)>缀块2(17.0%)>缀块4(4.5%).认为在森林被发育过程中,林下石生藓类具有涵养水分、蓄积土壤、截留枯落物、富积养分、溶蚀岩面及成土等功能,对改良林下岩面生境条件具有重要作用,有利于森林维管植物更新,对森林植被范围拓展及各类干扰地植被恢复与保持具有积极意义.

关键词: 石生藓, 森林植被, 干扰, 蓄土保水

Abstract: In order to examine the role of Petrophytia moss in maintaining the stability and integrity of forest vegetation,the distribution patterns of vascular plants among Petrophytia moss layer were investigated in five heterogeneous patches of evergreen broad leaved forest at Longwangshan, Zhejiang Province.The distribution and composition of vascular plants were jointly affected by various factors, such as disturbance degree in patch, moss growth condition,and water and soil conservation ability of moss layer. Original habitats patch 1 and patch 5 were kept well, and hence, the even depth, dry weight and maximum water holding capacity of moss layer, as well as the dry weight of soil and the soil water absorbing rate in moss layer for patch 1 and patch 5 were much more than other patches. For example,the even depth (cm) of moss layer were decreased in the order of patch 5(2.2)> patch 1(2.0)>patch 2(1.5)>patch 3(1.1)>patch 4(0.9);the ranking of vascular plant diversities among moss layer in each patch was patch 5(16)>patch 1(14)>patch 3(9)> patch 4(7),and the general cover of these plants was followed as patch 3(30.0%)>patch 1(28.5%)> patch 5 (26.5%)>patch 2 (17.0%)>patch 4(4.5%) . It was concluded that Petrophytia moss had the roles of reserving water and soil, holding litter,concentrating nutrient elements,and corrupting rock, which could improve the environmental condition of rock surface, help to the regeneration of vascular plants, and bring positive effects on the restoration or conversation of vegetation in disturbance sites and on the extension of forest scale.

Key words: Petrophytia moss, Forest vegetation, Disturbance, Water and soil conservation

中图分类号:

S717

王中生, 方炎明. 常绿阔叶林下石生藓类对森林植被发育的影响[J]. 应用生态学报, 2003, (6): 882-886.

WANG Zhongsheng, FANG Yanming. Influences of Petrophytia moss on vegetation development in evergreen broad-leaved forest[J]. Chinese Journal of Applied Ecology, 2003, (6): 882-886.

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