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Zhao R.,Kunming University of Science and Technology | Deng X.Q.,Yunnan institute of Forestry Inventory and Planning | Wu G.S.,Yunnan University of Finance and Economics | Li L.,Yunnan University of Finance and Economics
Applied Mechanics and Materials | Year: 2014

Climate change will result in the distribution range of plants that have changed and the impact on wildlife habitat quality. We will explore the Baima Snow Mountain Nature Protection Area Abies georgei population structure change and climate change impact on the growth of Abies georgei population, which can offer theoretical basis for biodiversity protection. Understanding the ecological characteristics is necessary to analyse it's population structure and probe into the causes. We set up 27 sample plots for field study above 3300m of Baima Snow Mountain in the northwest of Yunnan Province. We mapped age class distribution and number of survival individuals at different altitudes for analyzing the population age, structure and quantitative characteristics. Abies georgei has a stable development on mid-altitude. The population at mid-altitude showed a growing trend with a large proportion of saplings and number of individuals decreased with increase of age. The age structure and densities of low altitude shows a distinct increase in the number of survival individuals. Compared with other altitudes, Abies georgei population of each age classes is reasonable, except declining of age class I. The abnormal growth of juveniles at low and high altitudes, which may be caused by climate changes, becomes the disadvantage of Abies georgei population in the future. © (2014) Trans Tech Publications, Switzerland. Source

Clauzel C.,University of Franche Comte | Clauzel C.,Yunnan University of Finance and Economics | Xiqing D.,Yunnan institute of Forestry Inventory and Planning | Gongsheng W.,Yunnan University of Finance and Economics | And 4 more authors.
Biological Conservation | Year: 2015

This paper proposes an integrative approach to assessing the impact of several highway developments on the connectivity of high-elevation coniferous forests in Yunnan (China). These forests are the optimal habitat of the black and white snub-nosed monkey (Rhinopithecus bieti), an endemic endangered primate species. A graph-based approach is used for modeling the ecological network of this species and analyzing connectivity across several spatio-temporal scales, from daily movements to dispersal events. The aims of this paper are (1) to assess the impact of an existing highway by comparing connectivity with and without the infrastructure; (2) to assess the potential improvement of connectivity induced by diverting traffic fromthe highway to a tunnels/viaducts section under construction; (3) to compare several mitigation scenarioswith potential reforestation measures. The analysis is carried out both at the global level to quantify changes in the overall connectivity at several distances and, at the local level to identify which parts of the network are the most vulnerable. The results show that the highway has a low effect (-3.3%) on connectivity at the daily scale, but that increased gradually with distance (up to -21.5% for the largest), however habitat loss is only -0.1%. Some of the affected habitat patches are located 30 km north of the highway. The three mitigation scenarios have a different impact on connectivity. The third scenario leading to the creation of new habitat patches is the only one that strongly increases connectivity at several scales. This kind of graph approach can improve assessment of the impact of constructing a given infrastructure by taking into account the different scales of ecological processes and so can better target conservation measures for impacted species, here the emblematic, endangered, Yunnan snub-nosed monkey. © 2015 Elsevier Ltd. Source

Song J.,Yunnan institute of Forestry Inventory and Planning | Wen Q.,Yunnan institute of Forestry Inventory and Planning | Hua C.,Yunnan institute of Forestry Inventory and Planning | Tao J.,Yunnan institute of Forestry Inventory and Planning | Yu C.,Yunnan institute of Forestry Inventory and Planning
Wetland Science | Year: 2015

Based on the data obtained in the Second Wetland Resources Survey, the ecological status of key wetlands in Yunnan province was analyzed by using Analytic Hierarchy Process, and the results shows that the ecological status of 41.18% of key wetlands were "Good", and areas of these wetlands accounting for 12.81% of total areas of wetlands; 12.81% of wetlands were ranked "Middle", and the areas of which accounting for 61.08% of total wetland area; 18.82% of key wetlands were ranked "Poor", and the areas of these "Poor" wetlands accounting for 26.11% of total wetland area. The ecological status of key wetlands in Yunnan were worrying in general, and the ecological status of some wetlands of national and international significance in Yunnan were unoptimistic and the protection should be strengthened although those significant wetlands have been covered by present protected areas. The total areas of wetlands in Yunnan are less and fragmented, and the areas of usable wetlands are even lesser for particular mountainous land resource endowments of the province. The development of province, however, is highly relied on these wetland resources, especially lakes distributed in rivers basins. And the ecological status and distribution pattern of key wetlands was the result of overuse and pressures exerted on these wetlands. The result reflected that the wetland resource in Yunnan province is precious and it is significant to making "the Ecological Red Line" for the wetland resource. Source

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