Phytomass and plant functional diversity in early restoration of the degraded, semi-arid grasslands in northern China

被引:11
作者
Chu, Y.
He, W. -M.
Liu, H. -D.
Liu, J.
Zhu, X. -W.
Dong, M.
机构
[1] Chinese Acad Sci, Inst Bot, Lab Quantitat Vegetat Ecol, Beijing 100093, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
关键词
biodiversity and ecosystem functioning; Otindag sandland; primary productivity; semi-arid sandy grassland; species diversity;
D O I
10.1016/j.jaridenv.2006.03.007
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
We analysed vegetation data recorded in the degraded lowland grasslands in Otindag Sandland during the first 4-years of restoration (2001-2004) to investigate: (1) the contribution of individual plant functional type (PFT) to PFT diversity of community and (2) the relationships between primary productivity and biodiversity both at species and PFT levels. Sixteen PFTs were distinguished based on the following traits: (1) life-span (annual vs. perennial); (2) photosynthetic pathway (C-3 vs. C-4); (3) reproductive mode (clonal vs. non-clonal); and (4) growth form (grass vs. forb). Analysis of data indicates that density, coverage, number of species, phytomass, and relative importance of PFTs depended strongly on life-span, photosynthetic pathway, reproductive mode and growth form. Phytomass was significantly correlated with PFT diversity, but not species diversity. However, the relationship between phytomass and PFT diversity varied greatly with year, with a positive relationship in 2001 and 2004 and a negative one in 2002 and 2003. As the restoration proceeds, the perennial C-3 clonal grass became the greatest contributor to PFT diversity. (c) 2006 Published by Elsevier Ltd.
引用
收藏
页码:678 / 687
页数:10
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