文献类型：期刊文献

中文题名：黄土地表藻类结皮分布影响因素研究

英文题名：Distribution of Algae Crusts and Its Influencing Factors on the Soil Surface of the Loess Plateau

作者：吕建亮[1] 廖超英[1] 孙长忠[2] 刘莉丽[3] 王翠平[1]

第一作者：吕建亮

机构：[1]西北农林科技大学资源环境学院。陕西杨陵712100;[2]中国林业科学研究院华北林业实验中心,北京102300;[3]西北农林科技大学林学院,陕西杨陵712100

年份：2010

期号：1

起止页码：11-14

中文期刊名：西北林学院学报

外文期刊名：Journal of Northwest Forestry University

收录：CSTPCD;;北大核心:【北大核心2008】；CSCD:【CSCD_E2011_2012】；

基金：国家自然科学基金项目(30670339)

语种：中文

中文关键词：藻类结皮;黄土地表;分布特点;影响因素

外文关键词：algae crusts; the Loess Plateau; distribution characteristic; influencing factor

分类号：S154.4

摘要：以仅见于黄土高原半干旱区局部地段的黄土藻类群落为对象,分别从植被类型、坡向、坡度、地貌部位、干扰程度等方面对其分布规律进行系统地研究。通过调查,测定了藻类结皮在不同立地条件下的结皮厚度、植被分布、结皮盖度等指标。结果表明:①不同植被类型对藻类结皮盖度和厚度的影响呈现出不同的规律性。植被类型不同,藻类结皮盖度不同,荒坡>樟子松林>油松林。但结皮厚度表现出相反的特点,即油松林>樟子松林>荒坡地。②坡向对藻类结皮分布有明显影响。阴坡藻类结皮盖度和厚度均大于阳坡。③坡度对藻类结皮分布的影响是在多种因素的共同作用下形成的,不同坡度对藻类结皮盖度的影响差异不显著;但影响结皮厚度,即平缓坡>缓坡>陡坡>极陡坡。④地貌部位对藻类结皮分布有明显影响,在林地里,结皮盖度表现为坡上部>坡中部>坡下部。结皮厚度无显著差异。⑤干扰程度对藻类结皮分布具有明显影响,干扰程度弱,藻类结皮盖度和厚度均大,反之则小。
Distribution patterns of algae community which is only found in semi-arid area in Loess Plateau were systematically investigated from the aspects of distribution of vegetation types, different slope aspects, different degrees of slopes, different topographic positions, and different disturbance degrees etc. Through the survey, the indicators of algae crust thickness under different site conditions, the vegetation distribution, the cover degree of crust and other environment factors were measured. The results were as follows. 1. The influences of different vegetation types on the algae coverage and thickness exhibited regularties. Coverages were different in different vegetation types and in the or- der of barren slopes〉 Mongoliam pine forest〉 Chinese pine forest. But thickness displayed the opposite characteristic, ranked in order of Chinese pine forest 〉 Mongolian pine forest 〉barren slopes. 2. The effects of different slopes on soil algae crust distribution were significant, the coverage and thickness in the shady slope were bigger than those in the sunny slope. 3. The influence of slope on the algae was an combined action of several factors, the slope degree exhibited little impact on coverge but on thickness., namely conservative slope〉 gentle slope〉 steep slope 〉 extremely steep slope. 4. The landform spots exhibited significant influence no the algae mantle distribution, in forest land, for the algae coverage was in the order of up slope 〉 middle slope 〉 lower part slope. Mantle thickness is not remarkable difference. 5. The degree of disturbance had extreme effect on the algae coverage, the degree of disturbance was weak, the algae mantle coverage was bigger, and vice versa.