植被水土保持效应尺度性研究综述

A Review on Scale-dependency of Soil and Water Conservation Effect of Vegetation

从近年来植被水土保持效应的研究进展来看,不同学者根据不同尺度采用不同的研究方法,对斑块、坡面、景观和流域四大尺度进行了系统研究。由于植被水土保持生态过程与机制在大尺度与小尺度既有关联又有差异,植被水土保持效应存在明显的尺度性。通过对现有研究方法、结果和观点的整理与讨论,认为水土流失效应的影响因素随着研究尺度的变大变得越来越复杂,水土流失的尺度效应可从小区、坡面、小流域、大流域以及区域等不同尺度开展系统研究,旨在从小区和坡面等小尺度水土流失的研究结果上外推到较大尺度区域。

According to the research advances,researchers had systematically studied the soil and water conservation effect of vegetation from the scales of patch,slope,landscape and watershed with different methods for different scales.As the ecological process and mechanisms of soil and water conservation effect of vegetation at big and small scales were collected while differed,significant scale-dependency was claimed existing in soil and water conservation effect of vegetation.Based on the current research methods,results and views,it was figured out that the larger the investigated scale was,the more complicate the influencing factors were.The scale-dependency of soil and water loss could be studied from the scales of plot,slope,small and large basin and region;and the results could be deduced to larger scales.