2024年2月25日 星期日
以龟裂地植丛发生演替为例探讨植物对环境的反应与反馈效应
The responses of plant to environment and its feedback based on the general succession in takir
1999年 第8卷 第3期 页码[29-33]    下载全文[0.6MB]  
摘要

准葛尔盆地荒漠龟裂地植丛发生演替的研究结果表明:在荒漠龟裂地发生演替的初始阶段,环境因子对植物发生具有极大的限制作用。但是,一旦有先锋植物侵入,植物就会通过自身的生命活动不断改善其生存环境,为新植物的进入创造条件,新植物的定居又会反作用于环境,使其生存条件进一步改善,如此往复,推动整个微生态系统由简单至繁杂呈顺序性、方向性发展。生命的存在及其活动过程对环境的反应和对于环境的反馈作用,是导致生态系统顺向发展的根本动力。该研究将为如何改善生境质量提供理论基础,对植被恢复及受损生态系统的重建,特别是对加深全球变化环境下气候与植被关系的理解,提高预测陆地生态系统对全球变化反应的能力有重要的意义。

Abstract

The interaction between the vegetation in the polygonal ground in Zhunger Basin and the local environment is discussed .Usually the polygonal ground is bare due to the lack of water.How ever, once some pioneer plants, such as Anabasis aphylla L ., Salsola arbuscula Pall .or S . laricifolia Turcz .ex Litv ., invade and survive, the sand will be deposited in the leew ard of the plants .As a result of the sand deposition, the water content of soil surface w ill increase, and it will provide new plants with the invasion chance under the improved environment conditions. On the other hand, the more the plants invade, the better the environment becomes .In this way , a beneficial circle will be made betw een the plants and the local environment .Moreover, the relationships between sand deposition and soil surface w ater content, plant species number and soil water, and plant species number and sand depositio n are also discussed .The study is
helpful to restore and reestablish terrestrial ecosystems, to im prove the understanding of
the interaction between vegetation and environment, and to predict the responses of
terrestrial ecosy stems to global change
.
 

关键词演替; 龟裂地; 积沙; 土壤含水量; 植物种类;
Key wordssuccession; takir; sand deposition; water content; plant species
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基金项目国家自然科学基金重大项目( 39393000) 国家自然科学基金重点项目( 39730110)