林业科学研究2025，Vol.38Issue(1)：116-126,11.DOI:10.12403/j.1001-1498.20240142
秦岭中部太白山北坡3种栎类种群及其替代分布特征
Population Structure and Substitution Distribution Characteristics of Geographic Substitution Quercus Species on the Northern Slope of Taibai Mountain
摘要
Abstract
[Objective]Deciduous Quercus spp.are key components of deciduous broadleaved forests and coniferous broad-leaved mixed forests in temperate and subtropical zones in China.The population struc-ture and substitution distribution characteristics of three altitudinal substitution Quercus on the north slope of the Mts.Taibai in the middle part of the Mts.Qinling were investigated to address the potential mechan-ism on altitudinal substitution of woody species.[Method]The age structure,dynamics and changes in the importance value along the altitudinal gradient of the three Quercus species were analyzed.Static life tables,survival curves,and mortality and disappearance rate curves were plotted to assess the species'population characteristics and regeneration patterns.[Result]The altitudinal range and individual num-bers of Quercus aliena var.acutiserrata were higher than those of Q.variabilis and Q.wutaishanica.The population survival curves of the three Quercus species were similar to the Deevey-Ⅱtype.As for the status of natural regeneration,the transformation of young trees to small trees was significantly hindered in Q.aliena var.acutiserrata,while seedling renewal in Q.wutaishanica was poor.The mortality(qx)and van-ish(Kx)curves of the three species followed similar trends,with medium-and large-diameter individuals increasing and then decreasing in the 2-8 age classes.High mortality rate of individuals with small diamet-er were identified as a destabilizing factor limiting the population development.In terms of community spe-cies diversity,the Q.wutaishanica community had higher α-diversity.The quercus populations were largely affected by hydrothermal conditions.with Q.quercus and Q.wutaishanica being particularly responsive to MAT and MAP.Future warming and drying climate may have a greater impact on Q.variabilis and Q.wu-taishanica.[Conclusion]In the north slope of the Mts.Taibai,the altitudinal range and population size of Q.aliena var.acutiserrata are larger than those of Q.variabilis and Q.wutaishanica,and the latter exhibits certain"edge effect"characteristics.Given the significant reserves of middle age,future populations of the three Quercus species are expected to show an upward trend in the number of medium-and large-sized individuals.However,the low survival rate of young individuals may pose an instability factor for popula-tion regeneration and development.The distribution range of Quercus species may shift or change under the influence of intensified regional warming and drying in the future.This study contributes to understand-ing the dynamics of altitudinal distribution in woody species.关键词
栎类/地理替代/种群结构/气候变化Key words
Quercus/geographic substitution/population structure/climate change分类
农业科技引用本文复制引用
黄睿智,王奇,孙婧依,杨绍微,赵倚霈,刘建锋,肖文发..秦岭中部太白山北坡3种栎类种群及其替代分布特征[J].林业科学研究,2025,38(1):116-126,11.基金项目
国家自然科学基金(42071065) （42071065）
中央级公益性科研院所基本科研业务费专项(CAFYBB2022ZA001) （CAFYBB2022ZA001）
