| 降水变化对杉木种群动态的影响 |
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| 引用本文： | 冯明,纪小芳,姜姜.降水变化对杉木种群动态的影响[J].东北林业大学学报,2020(3):67-72. |
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| 作者姓名： | 冯明 纪小芳 姜姜 |
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| 作者单位： | 南方现代林业协同创新中心 |
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| 基金项目： | 国家重点研发计划项目(2017FYC0505500,2017FYC0505502);国家自然科学基金项目(41701225);江苏省自然科学基金项目(BK20170920)。 |
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| 摘 要： | 以杉木(Cunninghamia lanceolata)种群作为研究对象,在长时间尺度和降水条件下,应用模型方法研究森林种群分布的特征。利用森林动态模拟平台(SORTIE-ND),在1000~2000 mm的降水量范围内设置11种降水强度;在年降水量不变的条件下,对生长季降水量进行调控,设置9种情景,通过种群数量变异性,评价杉木种群稳定性;运用Taylor幂法则,评价种群数量的稳定性。结果表明:由于种群内部的相互作用,年降水量减少,干旱加重,种群稳定性降低;生长季降水量减少或增加,种群稳定性均会降低,这一现象反应了杉木的生态学特性。
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| 关 键 词： | 杉木 降水量 季节性干旱 种群稳定性 个体模型 |
Effect of Precipitation Changes on Dynamics of Chinese Fir Population |
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| Feng Ming,Ji Xiaofang,Jiang Jiang.Effect of Precipitation Changes on Dynamics of Chinese Fir Population[J].Journal of Northeast Forestry University,2020(3):67-72. |
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| Authors: | Feng Ming Ji Xiaofang Jiang Jiang |
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| Institution: | (Co-Innovation Center of Sustainable Forestry in Southern China,Key Laboratory of Soil and Water Conservation and Ecological Restoration,Nanjing Forestry University,Nanjing 210037,China) |
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| Abstract: | Using an individual model-based forest dynamics simulation platform(SORTIE-ND)with rainfall mechanism,Chinese fir(Cunninghamia lanceolata)was used as the research object,and 11 kinds of rainfall intensity were set on the rainfall of 1000-2000 mm;Under the constant annual rainfall,the rainfall in the growing season was regulated,and nine scenarios were set up to evaluate the stability of Chinese fir population by population variability.An attempt wasconducted to evaluate the stability of population numbers by combining the macro-ecological Taylor power law for the relationship between the variance of population changes and its mean.Under the influence of the internal interaction,our simulations suggest that the population stability of Chinese fir decreases with decreasing annual rainfall and aggravating drought.The population stability decreases with the decreases of precipitation in the growing season.The population stability decreases with the increase of rainfall in growing season.The ecological characteristics of Chinese fir was determined by this phenomenon. |
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| Keywords: | Cunninghamia lanceolate Precipitation Seasonal drought Population stability Individual-based model |
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