草业科学2016，Vol.33Issue(5)：825-834,10.DOI:10.11829/j.issn.1001-0629.2015-0395
高寒草甸植被特征对模拟增温的响应--以青藏高原多年冻土区为例
Response of vegetation characteristics in the alpine meadow ecosystem to simulated temperature enhancement---A case study of permafrost regions on the Qinghai-Tibet Plateau,China
摘要
Abstract
Infrared heater was used to simulate temperature enhancement in the field focusing on the effects of temperature enhancement on the growth and photosynthetic characteristics of three alpine plants:Polygonum viviparum,Saussurea superb,and Carex atrofusca in order to provide basis for estimating the sensitivity and friability of the meadow ecosystem in the permafrost region on the Qinghai-Tibet Plateau,China.The results showed that the simulated warming W1(1.88 ℃)and W2(3.19 ℃)could all alter the distributing frequency and season pattern of the alpine plant species.Compared with the CK,the W1 temperature enhancement brought differ-ent changes to different plants under which the height,frequency and chlorophyll contents of the S.pulchra were de-creased but the values of the P .viviparum and C.atrofusca were increased.The W2 warming evidently in-creased the height,frequency,and chlorophyll content of the P .viviparum and C.atrofusca but significantly (P<0.05)decreased the ratio of chlorophyll a to b of the S.pulchra resulted in its decreases in the height,fre-quency,and chlorophyll content.It showed significant differences in the photosynthesis indicators among the plant species,especially among the plots.All above indicates that the warming can improve the growth and de-velopment of the grazing plants in the alpine meadow and prolong their green grass duration resulting in benefit to the livestock production but the vegetation distribution evidently variegated.关键词
青藏高原/高寒草甸/模拟增温/植被特征/响应Key words
Qinghai-Tibet Plateau/alpine meadow/simulated warming/vegetation features/response分类
农业科技引用本文复制引用
陈翔,彭飞,尤全刚,王涛,薛娴..高寒草甸植被特征对模拟增温的响应--以青藏高原多年冻土区为例[J].草业科学,2016,33(5):825-834,10.基金项目
自然科学基金青年基金项目(41301211、41301210、41201195) （41301211、41301210、41201195）
中科院寒区旱区环境与工程研究所人才成长基金项目(Y351191001) （Y351191001）
