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Analysis of genetic diversity and prediction of larix species distribution in the Qinghai–Tibet Plateau,China

Journal of Forestry Research 2023年第3期34卷 705-715页

作者： Qiqiang Guo Huie Li Weilie Zheng Jinwen Pan Jie Lu Jiangrong Li Yu Zheng Institute for Forest Resources&Environment of Guizhou Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou ProvinceGuizhou UniversityGuiyang 550025People’s Republic of China College of Forestry Guizhou UniversityGuiyang 550025People’s Republic of China College of Agriculture Guizhou UniversityGuiyang 550025People’s Republic of China Institute of Tibet Plateau Ecology Tibet Agriculture and Animal Husbandry UniversityNyingchi Tibet 860000People’s Republic of China Key Laboratory of Forest Ecology in Tibet Plateau(Tibet Agriculture and Animal Husbandry University) Ministry of EducationNyingchi Tibet 860000People’s Republic of China Plant Research Center Chengdu Botanical GardenChengdu 610083People’s Republic of China

larix resources in the Qinghai-Tibet Plateau have important ecological and economic ***,the lack of genetic diversity background and related research hinders the development of conservation *** this study,genetic diversity and distribution of fi ve larix species were *** 19 polymorphic microsatellite markers to study 272 representative individuals from 13 populations,the results show low genetic diversity at the population level,with variation explained mainly by diff erentiation among *** larix populations were classifi ed into two clades,one formed by eight populations,including three of the species in this study,***,***,and *** *** other clade consists of fi ve populations,including the other two species in this study,*** thii and *** distance of the species was aff ected by geographical isolation and genetic diversity was mainly aff ected by *** area suitable for larix *** during the Last Glacial Maximum compared to the current distribution according to the niche model,but should increase in future climate scenarios(2050s),expanding westward along the *** results provide an important scientifi c basis for the development of conservation strategies and further the sustainable utilization of larix resources in the Qinghai-Tibet Plateau.

关键词： larix spp. Genetic diversity Phylogenetic relationship Genetic structure Ecological niche modeling Qinghai-Tibet Plateau

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Leaf nutrient dynamics and nutrient resorption:a comparison between larch plantations and adjacent secondary forests in Northeast China

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Journal of Plant Ecology 2016年第2期9卷 165-173页

作者： Tao Yan Xiaotao Lü Kai Yang Jiaojun Zhu State Key Laboratory of Forest and Soil Ecology Institute of Applied EcologyChinese Academy of SciencesNo.72 Wenhua RoadShenhe DistrictShenyang 110164China Qingyuan Forest CERN Chinese Academy of SciencesNo.72 Wenhua RoadShenhe DistrictShenyang 110016China University of Chinese Academy of Sciences No.19A Yuquan RoadShijingshan DistrictBeijing 100049China

Aims Conversion of secondary forests to pure larch plantations is a common management practice driven by the increasing demand for timber production in Northeast China,resulting in a reduction in soil nutrient availability after a certain number of years following *** resorption prior to leaf senescence was related to soil fertility,an important nutrient conservation strategy for plants,being especially significant in nutrient-poor ***,the seasonal dynamics of leaf nutrients and nutrient resorption in response to secondary forest conversion to larch plantations is not well *** A comparative experiment between larch plantations(larix spp.)and adjacent secondary forests(dominant tree species including Quercus mongolica,Acer mono,Juglans mandshurica and Fraxinus rhynchophylla)was *** examined the variations in leaf nutrient(macronutrients:N,P,K,Ca and Mg;micronutrients:Cu and Zn)concentrations of these tree species during the growing season from May to October in *** resorption efficiency and proficiency were compared between larix *** the broadleaved species in the secondary *** Findings Results show that the seasonal variation of nutrient concentrations in leaves generally exhibited two trends,one was a downward trend for N,P,K,Cu and Zn,and another was an upward trend for Ca and *** variations in foliar nutrient concentrations were mainly controlled by the developmental stage of leaves rather than by tree *** of the observed seven elements varied among the five tree species during leaf *** resorption efficiency varied 6–75%of N,P,K,Mg,Cu and Zn,while Ca was not retranslocated in the senescing leaves of all species,and Mg was not retranslocated in larix ***,larix *** to be more efficient and proficient(higher than 6–30%and 2–271%of nutrient resorption efficiency and resorption proficiency,respectively)in resorbing nutrients than the broa

关键词： seasonal variation nutrient resorption efficiency soil nutrient availability natural secondary forest larix spp.

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