松嫩草地草本植物生物多样性：物种多样性和功能群多样性

生态学杂志

松嫩草地草本植物生物多样性：物种多样性和功能群多样性

范高华^1,2,神祥金¹,李强¹,宋彦涛³,周道玮¹,黄迎新^1*#br#

(¹中国科学院东北地理与农业生态研究所，长春 130102； ^2中国科学院大学，北京 100049； ^3大连民族大学环境与资源学院，辽宁大连 116600)

出版日期:2016-12-10 发布日期:2016-12-10

Herbaceous plant biodiversity in Songnen grassland: Species diversity and functional group diversity.

FAN Gao-hua^1,2, SHEN Xiang-jin¹, LI Qiang¹, SONG Yan-tao³, ZHOU Dao-wei¹, HUANG Ying-xin^1*#br#

(¹Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; ^2University of Chinese Academy of Sciences, Beijing 100049, China; ³College of Environment and Resource, Dalian Nationalities University, Dalian 116600, Liaoning, China).

Online:2016-12-10 Published:2016-12-10

摘要/Abstract

摘要： 生物多样性对生态系统功能有重要的影响。作为生物多样性研究的重要方面，物种多样性和功能群多样性引起了生态学者的广泛关注。目前，有关松嫩草地的生物多样性一直缺乏全面而系统的研究。本研究通过对松嫩草地42种植物群落(涉及427个物种)的调查，全面探究了松嫩草地草本植物的生物多样性。从整体上看，松嫩草地主要以禾本科、菊科、豆科植物为主。松嫩草地优势种地上生物量在群落中占绝对优势，其地上生物量与群落地上生物量之间呈极显著正相关(R²=0.904)。不同群落之间物种多样性指数差异很大，其中最主要群落——羊草群落物种丰富度指数(2.6)最小。同时，松嫩草地不同功能群多样性指数之间差异明显，C₄禾草为优势种的群落功能群多样性指数明显高于C₃禾草为优势种的群落。松嫩草地功能群多样性与物种多样性之间呈极显著正相关(P<0.01)，功能群多样性在一定程度上能够指示松嫩草地生态系统的生物多样性。

关键词: 沙柳丛生枝, 相关生长关系, 代谢指数, 分支指数

Abstract: Biodiversity has significant impacts on ecosystem function. As important aspects of biodiversity, species diversity and functional group diversity have caused wide concern of ecologists. However, comprehensive and systematic studies are lacking on Songnen grassland biodiversity. In this study, we investigated 42 communities (including 427 species) and studied biodiversity of herbaceous plants in Songnen grassland. The species in Songnen grassland were dominated by families of Gramineae, Asteraceae, and Leguminosae. The aboveground biomass of the dominant species had absolute advantage, and was significantly positively related with the aboveground biomass of the community (R²=0.904). The species diversity indexes had significant differences between different communities in Songnen grassland. Among all the 42 communities, species richness index of Leymus chinensis dominated community (the most important community) was the lowest (2.6). The diversity indexes of different functional groups also had obvious differences. The functional group diversity of C₄ grasses dominated community was higher than that of C₃ grasses dominated community. There was a significant positive relationship between functional group diversity and species diversity (P<0.01), indicating that functional group diversity may be able to denote the biodiversity of ecosystem to some extent in Songnen grassland.

Key words: Salix psammophila branch, branching exponent, allometry relationship., metabolic exponent

范高华1,2,神祥金1,李强1,宋彦涛3,周道玮1,黄迎新1*. 松嫩草地草本植物生物多样性：物种多样性和功能群多样性[J]. 生态学杂志.

FAN Gao-hua1,2, SHEN Xiang-jin1, LI Qiang1, SONG Yan-tao3, ZHOU Dao-wei1, HUANG Ying-xin1*. Herbaceous plant biodiversity in Songnen grassland: Species diversity and functional group diversity.[J]. cje.