Effects of Salix sphaeronymphe Gorz shrubs on herbaceous community in forest secondary succession (Tibetan Plateau)
Effects of Salix sphaeronymphe Gorz shrubs on herbaceous community in forest secondary succession (Tibetan Plateau)
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沙柳灌木对森林次生演替草本群落的影响（青藏高原）
DOI：
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发表时间：
2011
影响因子：
0.5
通讯作者：
Wu, Ning
中科院分区：
文献类型：
--
作者：
Wang, Yechun;Bao, Weikai;Wu, Ning
本研究在青藏高原东部采伐的26种不同大小的沙柳灌丛中，研究了灌木大小对林下草本群落、草本植物和杂草的丰富度、盖度和生物量以及凋落物盖度和生物量的影响。结果表明，草本植物群落、草本植物和杂草的丰富度随着灌丛和露地面积的增加而显著增加。而灌木冠层下草本群落的盖度和生物量随着灌木大小的增加而减小。草和杂草作为不同的功能类群，对灌木面积的增加有不同的反应：草的盖度和生物量减少，而杂草的盖度和生物量增加。开阔地草本群落、草本植物和杂草的盖度和生物量随面积变化不明显。在灌木林冠下，枯枝落叶的盖度和质量与面积呈正相关，而在露地则不是这样。结果表明，在森林次生演替过程中，灌木对群落的多样性有正向影响，对草本群落的盖度和生产力有负向影响，且这种影响是大小相关的。此外，草本植物的不同功能群可以对灌木的存在做出不同的反应。
In the present study, we selected a total of 26 Salix sphaeronymphe Gorz shrubs of various sizes on a cutover in the eastern Tibetan Plateau to evaluate the effects of shrub size on richness, cover and biomass of the understorey herbaceous community, grasses and forbs, as well as litter cover and biomass. Results indicated that the richness of herbaceous community, grasses and forbs significantly increased with the increased area of both undershrub canopies and open field. However, the cover and biomass of the herbaceous community beneath the shrub canopies decreased with increasing shrub size. Grasses and forbs, as different functional groups, responded differently to the increasing area of shrubs: the cover and biomass of grasses decreased while those of forbs increased. The cover and biomass of herbaceous community, grasses and forbs in the open field did not obviously vary with area. Under the shrub canopies, the cover and mass of litter positively correlated to area, but this was not the case in the open field. Our results suggest that shrubs have a positive effect on diversity and a negative effect on the cover and productivity of the herbaceous community in forest secondary succession on the alpine cutovers, and that these effects are size-dependent. Moreover, different functional groups of herbaceous plants can respond differently to the presence of shrubs.
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影响因子：
4.8
作者：
C. L. Turner;A. Knapp
通讯作者：
C. L. Turner;A. Knapp
DOI：
10.1007/bf00045497
发表时间：
1986-05
期刊：
Vegetatio
影响因子：
--
作者：
S. Guevara;Silvia E. Purata;E. Maarel
通讯作者：
S. Guevara;Silvia E. Purata;E. Maarel
影响因子：
3.3
作者：
G. Kidron
通讯作者：
G. Kidron
影响因子：
6.1
作者：
D. Wedin;D. Tilman
通讯作者：
D. Wedin;D. Tilman
影响因子：
5.9
作者：
Moro, MJ;Pugnaire, FI;Puigdefabregas, J
通讯作者：
Puigdefabregas, J