scholarly journals Structure and species diversity of boreal forests in Mt. Baikalu, Huzhong area, Daxing'an Mountains, Northeast China

2004 ◽  
Vol 12 (1) ◽  
pp. 182-189
Author(s):  
GU Tao ◽  
Shuqing Zhao ◽  
PIAO Shi-Long ◽  
ZONG Zhan-Jiang ◽  
WU Xiao-Pu ◽  
...  
Keyword(s):  
Species Diversity ◽  
Boreal Forests ◽  
Northeast China ◽  
Daxing’An Mountains

Diversification of tree stands as a means to manage pests and diseases in boreal forests: myth or reality?

2006 ◽  
Vol 36 (2) ◽  
pp. 324-336 ◽  
Author(s):  
Julia Koricheva ◽  
Harri Vehviläinen ◽  
Janne Riihimäki ◽  
Kai Ruohomäki ◽  
Pekka Kaitaniemi ◽  
...  
Keyword(s):  
Species Diversity ◽  
Tree Species ◽  
Boreal Forests ◽  
Tree Mortality ◽  
Tree Species Diversity ◽  
Mixed Stands ◽  
Tree Species Composition ◽  
Pests And Diseases ◽  
Pest Outbreaks ◽  
Disease Epidemics

Pure forest stands are widely believed to be more prone to pest outbreaks and disease epidemics than mixed stands, leading to recommendations of using stand diversification as a means of controlling forest pests and pathogens. We review the existing evidence concerning the effects of stand tree-species diversity on pests and pathogens in forests of the boreal zone. Experimental data from published studies provide no overall support for the hypothesis that diversification of tree stands can prevent pest outbreaks and disease epidemics. Although beneficial effects of tree-species diversity on stand vulnerability are observed in some cases, in terms of reductions in damage, these effects are not consistent over time and space and seem to depend more on tree-species composition than on tree-species diversity per se. In addition, while mixed stands may reduce the densities of some specialized herbivores, they may be more attractive to generalist herbivores. Given that generalist mammalian herbivores cause considerable tree mortality during the early stages of stand establishment in boreal forests, the net effect of stand diversification on stand damage is unlikely to be positive.

Emissions of nitrous oxide from continuous permafrost region in the Daxing'an Mountains, Northeast China

2019 ◽  
Vol 198 ◽  
pp. 34-45 ◽  
Author(s):  
Weifeng Gao ◽  
Yunlong Yao ◽  
Hong Liang ◽  
Liquan Song ◽  
Houcai Sheng ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Northeast China ◽  
Permafrost Region ◽  
Continuous Permafrost ◽  
Daxing’An Mountains

scholarly journals Stem taper functions for Betula platyphylla in the Daxing’an Mountains, northeast China

2020 ◽  
Author(s):  
Muhammad Khurram Shahzad ◽  
Amna Hussain ◽  
Harold E. Burkhart ◽  
Fengri Li ◽  
Lichun Jiang
Keyword(s):  
Northeast China ◽  
Betula Platyphylla ◽  
Stem Taper ◽  
Daxing’An Mountains

Influence of Site and Stand Factors on the Distribution of Crustose Lichens Of The Caliciales in a Suboceanic Spruce Forest Area in Central Norway

1996 ◽  
Vol 28 (4) ◽  
pp. 315-330 ◽  
Author(s):  
Håkon Holien
Keyword(s):  
Species Diversity ◽  
Boreal Forests ◽  
Detrended Correspondence Analysis ◽  
Stand Age ◽  
Spruce Forest ◽  
Humid Climate ◽  
Forest Patches ◽  
Young Forests ◽  
Old Trees ◽  
Crustose Lichens

AbstractThe distribution of crustose Caliciales has been surveyed in 100 spruce forest patches in Sør-Trøndelag, central Norway. Relationships between occurrence of the species and a number of site and stand variables were analysed by detrended correspondence analysis (DCA) and direct gradient analysis. Species diversity7 was significantly higher in old forests and in forests at higher altitudes compared to young forests and forests at lower altitudes. Old trees and snags are considered to be the most important structural components in old forests promoting species diversity of the Caliciales. Threatened or vulnerable species, such as Chaenotheca gracilliina, Cybebe gracilenta, Sclerophora coniophaea and S. peronella were confined to forest on rich soils showing no correlation with forest stand age. Chaenotheca brachypoda and C. trichialis were found to be the most typical old forest species among the Caliciales. Humidiphilous species are considered to be less affected by forestry in a humid climate. A change in forestry practice towards methods imitating the natural dynamic processes is considered necessary to maintain species diversity of the Caliciales in boreal forests.

Dynamics of ruderal species diversity under the rapid urbanization over the past half century in Harbin, Northeast China

2013 ◽  
Vol 17 (2) ◽  
pp. 455-472 ◽  
Author(s):  
Xiaoshuang Chen ◽  
Weibo Wang ◽  
Hong Liang ◽  
Xiaoli Liu ◽  
Liangjun Da
Keyword(s):  
Species Diversity ◽  
Northeast China ◽  
Rapid Urbanization ◽  
Half Century ◽  
The Past ◽  
Past Half Century ◽  
Past Half

scholarly journals Association distribution characteristics of natural and artificial Larix gmelinii forests along environmental gradients in northeast China

2019 ◽  
Author(s):  
Xiaohang Bai ◽  
Jinghua Yu ◽  
Shusheng Yuan ◽  
Yihong Tan
Keyword(s):  
Species Diversity ◽  
Northeast China ◽  
Larix Gmelinii ◽  
Annual Precipitation ◽  
Environmental Drivers ◽  
Slope Aspect ◽  
Scientific Management ◽  
Plant Association ◽  
Natural Forests ◽  
Plant Associations

Abstract Background: Larix gmelinii forest is one of coniferous forests in cold-temperate zone, which is a vital part of national strategic landscape of ecological security of China. Plant association distribution is different in natural and artificial Larix gmelinii forests, meanwhile, determining mechanisms in typical associations of Larix gmelinii forests still need to be explored. The study focused on which environmental factors actuated association distribution of natural and artificial Larix gmelinii forests in northeast China. Two-way indicator species analysis (TWINSPAN) and canonical correspondence analysis (CCA) were used to classify plant associations and explored the relationship between species and environment. Results: All the plots (n=175, size=30 m×30 m) of Larix gmelinii forests were classified into 6 plant associations by TWINSPAN. Species diversity in natural forests were higher than that in artificial forests. Ass.III and Ass.IV only appeared in natural forests, meanwhile, Ass.VI only appeared in artificial forests. The primary environmental drivers of species diversity patterns in natural forests were annual mean temperature, followed by annual precipitation, elevation, slope aspect, and canopy density. However, elevation and annual precipitation had strong effects in determining association distribution in artificial forests. Conclusions: Plant association distribution showed habitat preferences, besides, natural forests had higher species diversity and more resistance than artificial forests. The study can be used as a reference for Larix gmelinii forest ecosystem protection in northeast China and a theoretical basis for scientific management in similar areas.

Spatial simulation of the effect of fire and harvest on aboveground tree biomass in boreal forests of Northeast China

2014 ◽  
Vol 29 (7) ◽  
pp. 1187-1200 ◽  
Author(s):  
Xu Luo ◽  
Hong S. He ◽  
Yu Liang ◽  
Wen J. Wang ◽  
Zhiwei Wu ◽  
...  
Keyword(s):  
Boreal Forests ◽  
Northeast China ◽  
Tree Biomass ◽  
Spatial Simulation ◽  
Aboveground Tree Biomass
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