Contact Sino-Eco Webmaster
|
CAS Workshop on Ecosystem Succession Theory and Practice of Ecological Restoration 川中半自然型防护林演替过程中的物种多样性 阳小成1
钟章成2 (1华南师范大学生命科学学院，广州
510631; 2西南师范大学亚热带生物地理研究所，重庆
400715)
摘要：
四川中部绵阳官司河流域的半自然型林是长江中上游地区防护林的一个较典型类型。本文以它为研究对象，对群落的物种多样性及其在次生演替过程中的动态变化趋势进行了初步研究，并结合影响多样性的几个主要环境因子进行了相关性分析。结果表明：（1）现阶段该防护林的植物种类组成和群落结构均较简单，松、柏、栎混交的针阔叶林现占绝对优势，其物种多样性较小，但随着群落次生演替的进展，各层次的多样性趋于增加；（2）用灰色系统理论的关联度分析方法研究群落的物种多样性与主要环境因子的相关性是可行的。经测定,研究区的土壤pH值，外界干扰度和土壤含水量等指标对防护林的物种多样性有显著的影响。 关键词：四川绵阳；半自然型防护林；物种多样性；关联度分析 Species diversity under secondary
succession of of semi-natural protected forest in center of Sichuan
Yang Xiaocheng1 Zhong Zhangcheng2(1College
of Life Science, South ChinaNormal University, Guangzhou 510631,
China; 2Institute of Subtropical Biogeography, Southwest
China Normal University, Chongqing 400715, China) Abstract:
The semi-natural forest of Guansi River watershed, located in
central of Sichuan province, is
a typical protected forest type in the middle-upper stream of
Changjiang River. This paper deal with then species diversity of
protected forest in this region and its trend in the course of
secondary succession. Moreover, the correlative grade between the
species diversity and several main environmental factors has also
been studied. The results showed that: (1) The species diversity of
the protected forest seemed low at present, and the mixed forest of
pine-cypress-oak is the absolutely dominant community type, but the
species diversity of different layers (they were tree, scrub and
herb layer, respectively) trended to become higher with the advance
of the secondary succession; (2) The study of relationship between
the diversity of woody plants and 9 environmental factors in each
plots proved that the species diversity of the protected forest in
the study area was obviously affected by soil pH value, external
interference and soil moisture.
Key words:
Mianyang, Sichuan; semi-natural forest; species diversity;
correlative grade analysis
| ||||||||||||||
