Ecophysiological characteristics of leaves and fine roots in dominant tree species in a subalpine coniferous forest of western Sichuan during seasonal frozen soil period

2014 ◽  
Vol 38 (4) ◽  
pp. 343-354 ◽  
Author(s):  
XIAO Qun-Ying ◽  
◽  
YIN Chun-Ying ◽  
PU Xiao-Zhen ◽  
QIAO Ming-Feng ◽  
...  
Keyword(s):  
Tree Species ◽  
Fine Roots ◽  
Coniferous Forest ◽  
Frozen Soil ◽  
Western Sichuan ◽  
Subalpine Coniferous Forest ◽  
Seasonal Frozen Soil

scholarly journals Effect of Gap Size And Elevation On The Regeneration And Coexistence of Three Tree Species In A Subalpine Coniferous Forest

2021 ◽  
Author(s):  
Wangya Han ◽  
Li Chen ◽  
G. Geoff Wang ◽  
Dan Liu ◽  
Guohua Liu
Keyword(s):  
Community Assembly ◽  
Tree Species ◽  
Species Coexistence ◽  
Elevation Gradient ◽  
Coniferous Forest ◽  
Photon Flux ◽  
Gap Size ◽  
Stem Size ◽  
Subalpine Coniferous Forest ◽  
Old Growth Forest

Abstract Background: Gap size and environmental gradient have fundamental influence on the tree species coexistence and community assembly. We studied the regeneration and coexistence of three co-dominant tree species in three different gap size (large gap, 201-402 m2; medium gap, 101-200 m2; small gap, 38.8-100 m2) along an elevation gradient (between 3000m and 3500m) in an old-growth forest, on Mount Nadu in southwest China. Results: We found that the photosynthetic photon flux density (PPFD) was positively affected by gap size during the growing season. All three species had a higher regeneration density in large gaps, but the detailed response to treatments for each species depended on its stem size. Gap size had a significant positive effect on the regeneration density of Abies faxoniana small trees and Betula utilis saplings, but had no significant effect on Acer maximowiczii regeneration density. Saplings regeneration density is more sensitive to elevation compared to small trees regeneration density. Large gaps magnified the negative effects of elevation on regeneration density. Our findings indicated that Abies may maintain its regeneration advantage with low-intensity canopy disturbance, and large gap may provide excellent opportunities for broadleaf species (Betula and Acer) establishment and regeneration in this subalpine coniferous forest. Conclusion: Microhabitats heterogeneity controlled by characteristics of forest gaps along an elevation affected regeneration niche difference of tree species, which contributed to species coexistence and community assembly processes.

Fine roots branch orders of Abies faxoniana respond differentially to warming in a subalpine coniferous forest ecosystem

2016 ◽  
Vol 91 (5) ◽  
pp. 955-966 ◽  
Author(s):  
Xiaozhen Pu ◽  
Chunying Yin ◽  
Qunying Xiao ◽  
Mingfeng Qiao ◽  
Qing Liu
Keyword(s):  
Forest Ecosystem ◽  
Fine Roots ◽  
Coniferous Forest ◽  
Abies Faxoniana ◽  
Subalpine Coniferous Forest
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