Decoupling the Complementarity Effect and the Selection Effect on the Overyielding of Fine Root Production Along a Tree Species Richness Gradient in Subtropical Forests

被引:6
作者
Liu, Cong [1 ,2 ]
Xiang, Wenhua [2 ,3 ]
Xie, Binggeng [1 ]
Ouyang, Shuai [2 ,3 ]
Zeng, Yelin [2 ,3 ]
Lei, Pifeng [2 ,3 ]
Peng, Changhui [3 ,4 ]
机构
[1] Hunan Normal Univ, Coll Resources & Environm Sci, Changsha 410081, Hunan, Peoples R China
[2] Cent South Univ Forestry & Technol, Fac Life Sci & Technol, Changsha 410004, Hunan, Peoples R China
[3] Huitong Natl Stn Sci Observat & Res Chinese Fir P, Huitong 438107, Hunan, Peoples R China
[4] Univ Quebec Montreal, Inst Environm Sci, Dept Biol Sci, Montreal, PQ H3C 3P8, Canada
基金
中国国家自然科学基金;
关键词
Fine root biomass; fine root productivity; species richness; tree species identity; biodiversity effect; belowground production; PLANT DIVERSITY; BIODIVERSITY EXPERIMENT; FUNCTIONAL-ROLE; NORWAY SPRUCE; BIOMASS; IMPACTS; PHENOLOGY; COEXISTENCE; COMPETITION; STANDS;
D O I
10.1007/s10021-020-00538-z
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
The mechanism whereby tree species richness and identity affect the production of fine roots (<= 2 mm) in forests remains controversial. Complementarity effects (via resource partitioning and facilitation, CEs) and selection effects (that is, dominant of species with particular traits, SEs) are the two hypotheses to explain biodiversity effects on ecosystem functions. This study aimed to (1) examine how tree species diversity affects fine root production and (2) disentangle the complementarity effect and the selection effect on the relationship between biodiversity and fine root production. A total of 60 tree clusters with 15 combinations of diversity gradients consisting of 1-4 tree species (Pinus massoniana,Choerospondias axillaris,Cyclobalanopsis glaucaandLithocarpus glaber) were established in subtropical forests. The sequential soil core and ingrowth core methods were used in each cluster to measure fine root biomass and productivity. Fine root production increased with increase in tree species richness. The biodiversity effects on fine root production mostly resulted from CEs. In the nongrowing season, in most cases, the CE on biomass was positive and became stronger as richness increased, but the opposite situation was observed in the growing season. The strong positive and negative effects of the proportions ofC. glaucaandL. glaberin the tree clusters on fine root biomass, CEs and SEs, suggest the coordinated action of species diversity and identity in modulating biodiversity effects on belowground processes.
引用
收藏
页码:613 / 627
页数:15
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