scholarly journals The indicator roles of endangered scaly sided merganser (Mergus squamatus) in submontane rivers of Changbai Mountains, China

2021 ◽  
Vol 129 ◽  
pp. 107966
Author(s):  
Wenyu Xu ◽  
Lin Wang ◽  
Ye Gong ◽  
Haitao Wang
Keyword(s):  
Changbai Mountains

scholarly journals The Impact of Human Pressure and Climate Change on the Habitat Availability and Protection of Cypripedium (Orchidaceae) in Northeast China

Plants ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 84
Author(s):  
Huanchu Liu ◽  
Hans Jacquemyn ◽  
Xingyuan He ◽  
Wei Chen ◽  
Yanqing Huang ◽  
...  
Keyword(s):  
Climate Change ◽  
Northeast China ◽  
Habitat Destruction ◽  
Changbai Mountains ◽  
Suitable Habitat ◽  
Human Pressure ◽  
Terrestrial Orchids ◽  
The Future ◽  
Suitable Habitats ◽  
The Impact

Human pressure on the environment and climate change are two important factors contributing to species decline and overall loss of biodiversity. Orchids may be particularly vulnerable to human-induced losses of habitat and the pervasive impact of global climate change. In this study, we simulated the extent of the suitable habitat of three species of the terrestrial orchid genus Cypripedium in northeast China and assessed the impact of human pressure and climate change on the future distribution of these species. Cypripedium represents a genus of long-lived terrestrial orchids that contains several species with great ornamental value. Severe habitat destruction and overcollection have led to major population declines in recent decades. Our results showed that at present the most suitable habitats of the three species can be found in Da Xing’an Ling, Xiao Xing’an Ling and in the Changbai Mountains. Human activity was predicted to have the largest impact on species distributions in the Changbai Mountains. In addition, climate change was predicted to lead to a shift in distribution towards higher elevations and to an increased fragmentation of suitable habitats of the three investigated Cypripedium species in the study area. These results will be valuable for decision makers to identify areas that are likely to maintain viable Cypripedium populations in the future and to develop conservation strategies to protect the remaining populations of these enigmatic orchid species.

scholarly journals Genetic and Epigenetic Changes during the Upward Expansion of Deyeuxia angustifolia Kom. in the Alpine Tundra of the Changbai Mountains, China

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 291
Author(s):  
Biao Ni ◽  
Jian You ◽  
Jiangnan Li ◽  
Yingda Du ◽  
Wei Zhao ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Dna Methylation ◽  
Genetic Variation ◽  
Soil Properties ◽  
Changbai Mountains ◽  
Epigenetic Variation ◽  
Geographical Distance ◽  
Mantel Tests ◽  
Epigenetic Diversity ◽  
Different Populations

Ecological adaptation plays an important role in the process of plant expansion, and genetics and epigenetics are important in the process of plant adaptation. In this study, genetic and epigenetic analyses and soil properties were performed on D. angustifolia of 17 populations, which were selected in the tundra zone on the western slope of the Changbai Mountains. Our results showed that the levels of genetic and epigenetic diversity of D. angustifolia were relatively low, and the main variation occurred among different populations (amplified fragment length polymorphism (AFLP): 95%, methylation sensitive amplification polymorphism (MSAP): 87%). In addition, DNA methylation levels varied from 23.36% to 35.70%. Principal component analysis (PCA) results showed that soil properties of different populations were heterogeneous. Correlation analyses showed that soil moisture, pH and total nitrogen were significantly correlated with genetic diversity of D. angustifolia, and soil temperature and pH were closely related to epigenetic diversity. Simple Mantel tests and partial Mantel tests showed that genetic variation significantly correlated with habitat or geographical distance. However, the correlation between epigenetic variation and habitat or geographical distance was not significant. Our results showed that, in the case of low genetic variation and genetic diversity, epigenetic variation and DNA methylation may provide a basis for the adaptation of D. angustifolia.

A Modeling of the Magma Chamber Beneath the Changbai Mountains Volcanic Area Constrained by Insar and GPS Derived Deformation

2008 ◽  
Vol 51 (4) ◽  
pp. 765-773 ◽  
Author(s):  
Guo-Hu CHEN ◽  
Xin-Jian SHAN ◽  
Wooil M. Moon ◽  
Kyung-Ryul Kim
Keyword(s):  
Magma Chamber ◽  
Changbai Mountains ◽  
Volcanic Area

scholarly journals Modeling diameter distribution of the broadleaved-Korean pine mixed forest on Changbai Mountains of China

2006 ◽  
Vol 49 (S1) ◽  
pp. 177-188 ◽  
Author(s):  
Shunzhong Wang ◽  
Limin Dai ◽  
Guohua Liu ◽  
Jianqiong Yuan ◽  
Hengmin Zhang ◽  
...  
Keyword(s):  
Mixed Forest ◽  
Diameter Distribution ◽  
Changbai Mountains ◽  
Korean Pine

Comparison of soil respiration among three temperate forests in Changbai Mountains, China

2010 ◽  
Vol 40 (4) ◽  
pp. 788-795 ◽  
Author(s):  
Xu Wang ◽  
Yanling Jiang ◽  
Bingrui Jia ◽  
Fengyu Wang ◽  
Guangsheng Zhou
Keyword(s):  
Soil Respiration ◽  
Soil Temperature ◽  
Secondary Forest ◽  
Temperature Response ◽  
Stand Age ◽  
Changbai Mountains ◽  
Primary Forest ◽  
Plantation Forest ◽  
Successional Stage ◽  
Coniferous Plantation

CO2 efflux from forest soils is an important process in the global carbon cycle; however, effects of stand age and successional status remain uncertain. We compared soil respiration and its relationship to soil carbon content, forest floor mass, root biomass, soil temperature, and soil moisture content among three temperate forest ecosystems in Changbai Mountains, northeastern China, from 2003 to 2005. Forest types included an old-growth, mixed coniferous and broad-leaved primary forest (MN), a middle-aged, broad-leaved secondary forest (BL), and a young coniferous plantation forest (CP). Average annual soil CO2 efflux at BL (1477.9 ± 61.8 g C·m–2·year–1) was significantly higher than at CP (830.7 ± 48.7 g C·m–2·year–1) and MN (935.4 ± 53.3 g C·m–2·year–1). Differences in soil temperature among those sites were not statistically significant but contributed to the differences in annual CO2 efflux. In addition, the temperature response of soil CO2 efflux was higher at MN (Q10 = 2.78) than that at BL (Q10 = 2.17) and CP (Q10 = 2.02). Our results suggest that successional stage affects soil respiration by the differences in substrate quantity and quality, environmental conditions, and root respiration.

Diversity of Methanotrophic Bacteria Community between Different Development Stages in Chinese Temperate Forest

2013 ◽  
Vol 726-731 ◽  
pp. 4226-4231
Author(s):  
Xing Bo Zheng ◽  
Xin Sui ◽  
Jun Qiang Zheng ◽  
Shi Jie Han ◽  
Guan Hua Dai
Keyword(s):  
Forest Succession ◽  
Organic Matter Content ◽  
Diversity Indices ◽  
Matter Content ◽  
Changbai Mountains ◽  
Forest Land ◽  
Community Structures ◽  
Similarity Coefficients ◽  
Aerobic Methanotrophs ◽  
Succession Process

The method of terminal restriction fragment length polymorphism (T-RFLP) was used to study the community structures and diversities of aerobic methanotrophs by the key functional genes pmoA in the forest land soils of Changbai Mountains in China. And the effects of soil factors on them were also evaluated, and then the mechanism of microbiological communities in forest land soils response to the forest succession were discussed. The results showed that the diversity indices of aerobic methanotrophs were higher, and community structures appeared more complicated at the later plots. Their similarity coefficients gradually declined from the middle of the forest succession to the adjacent forest, indicating communities dynamic succession. During succession process, soil moisture and organic matter content had significant influence on it. The microbial communities were under the stress of succession process, which led to more emission of other greenhouse-gas from forest soils.

Pollen flux and vertical dispersion in coniferous and deciduous broadleaved mixed forest in the Changbai Mountains

2007 ◽  
Vol 52 (11) ◽  
pp. 1540-1544 ◽  
Author(s):  
QingHai Xu ◽  
YueCong Li ◽  
LiPing Zhou ◽  
YiYin Li ◽  
ZhenQing Zhang ◽  
...  
Keyword(s):  
Mixed Forest ◽  
Changbai Mountains ◽  
Vertical Dispersion ◽  
Pollen Flux
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