Genetic variation and age-age correlations ofEucalyptus grandisat Dongmen Forest Farm in southern China

AbstractInvasive species face new selective pressures and low genetic variation caused by genetic bottlenecks and founder effects when they are introduced into novel environments. Epigenetic variation may help them to cope with these problems. Mile-a-minute (Mikania micrantha Kunth) is a highly invasive exotic weed that has seriously damaged biodiversity and agricultural ecosystems. We first adopted methylation-sensitive amplified polymorphism (MSAP) markers to investigate epigenetic variation of 21 M. micrantha populations in southern China, and further explored the effects of environmental factors on population epigenetic differentiation by correlating epigenetic and climate and soil data. Adaptive epiloci positively correlated with climate/soil variables were identified. Minimum temperature of the coldest month and mean temperature of the coldest quarter were considered as decisive factors for its distribution. Climate is presumed to play a relatively more important role than soil in shaping the adaptive epigenetic differentiation in M. micrantha. Under ongoing global warming, populations of M. micrantha are predicted to expand northward. In addition, the weed also presented higher epigenetic variation compared with genetic variation. Leaf shape variation was detected related to methylation-state change at the population level.

Download Full-text

Using a Simple Model to Determine the Best Management Regimes for Plantations at the Stand Level: A Case Study of Moshao Forest Farm in the Red-Soil Hilly Region of Southern China

Forests ◽

10.3390/f12101358 ◽

2021 ◽

Vol 12 (10) ◽

pp. 1358

Author(s):

Jianjia Zhu ◽

Erfu Dai ◽

Du Zheng ◽

Silong Wang

Keyword(s):

Forest Management ◽

Southern China ◽

Planning Horizon ◽

Ecological Impacts ◽

Timber Production ◽

Best Management ◽

Management Regimes ◽

Harvesting Intensity ◽

Forest Farm

Plantations in Southern China are experiencing several major problems concerning even-aged forest structures and dwindling ecosystem services under traditional forest management. The objective of this study was to determine the best management regimes (BMRs) for sustainable forest management using the Moshao forest farm as a case study. We constructed a framework for BMR modeling characterized by highly scheduled timber production (STP), low fluctuations in periodically scheduled timber harvest levels (FPS), and age class structure (ACS) at the end of the planning horizon. A paired analysis was conducted between the three indicators to identify suitable management planning for long-term timber production. Our results suggest that STP, FPS, and ACS are correlated, enabling the control of these forest performance indicators by setting various harvesting intensities in a planning horizon. We found that management regimes (MRS) with cutting area percentages from 20% to 40% and a cutting period of 10 years combined with small-area clear-cutting (≤5 ha) are optimal (MR6–MR10) for the Moshao forest farm in Southern China. In particular, MR with a cutting area percentage of 35% is the best option (MR9). These findings suggest that an applicable MR is designed by identifying the optimal harvesting intensity. The current local harvesting intensity can be properly increased to balance between timber production and ecological impacts on plantations.

Download Full-text

Genetic variation and the conservation of isolated populations of Derris trifoliata (Leguminosae), a mangrove-associated vine, in southern China

Biochemical Systematics and Ecology ◽

10.1016/j.bse.2011.10.017 ◽

2012 ◽

Vol 40 ◽

pp. 118-125 ◽

Cited By ~ 3

Author(s):

Bin Wu ◽

Shi-Lei Geng ◽

Bin Shu

Keyword(s):

Genetic Variation ◽

Southern China ◽

Isolated Populations

Download Full-text

Genetic Variation of Multiple Serotypes of Enteroviruses Associated with Hand, Foot and Mouth Disease in Southern China

Virologica Sinica ◽

10.1007/s12250-020-00266-7 ◽

2020 ◽

Cited By ~ 1

Author(s):

Yonghong Zhou ◽

Le Van Tan ◽

Kaiwei Luo ◽

Qiaohong Liao ◽

Lili Wang ◽

...

Keyword(s):

Genetic Variation ◽

Southern China ◽

Foot And Mouth Disease ◽

Mouth Disease ◽

Foot And Mouth

Download Full-text

Effects of Colonization, Geography and Environment on Genetic Divergence in the Intermediate Leaf-Nosed Bat, Hipposideros larvatus

Animals ◽

10.3390/ani11030733 ◽

2021 ◽

Vol 11 (3) ◽

pp. 733

Author(s):

Xiangfeng Meng ◽

Tong Liu ◽

Lin Zhang ◽

Longru Jin ◽

Keping Sun ◽

...

Keyword(s):

Population Structure ◽

Genetic Variation ◽

Evolutionary Biology ◽

Large Scale ◽

Southern China ◽

Isolation By Distance ◽

Mainland China ◽

Hainan Island ◽

Colonization History ◽

Evolutionary Forces

Determining the evolutionary history and population drivers, such as past large-scale climatic oscillations, stochastic processes and ecological adaptations, represents one of the aims of evolutionary biology. Hipposideros larvatus is a common bat species in Southern China, including Hainan Island. We examined genetic variation in H. larvatus using mitochondrial DNA and nuclear microsatellites. We found a population structure on both markers with a geographic pattern that corresponds well with the structure on mainland China and Hainan Island. To understand the contributions of geography, the environment and colonization history to the observed population structure, we tested isolation by distance (IBD), isolation by adaptation (IBA) and isolation by colonization (IBC) using serial Mantel tests and RDA analysis. The results showed significant impacts of IBD, IBA and IBC on neutral genetic variation, suggesting that genetic variation in H. larvatus is greatly affected by neutral processes, environmental adaptation and colonization history. This study enriches our understanding of the complex evolutionary forces that shape the distribution of genetic variation in bats.

Download Full-text