Effect of human disturbance on the structure and regeneration of forests in the Nevado de Toluca National Park, Mexico

作     者：Angel Rolando Endara Agramont Sergio Franco Maass Gabino Nava Bernal Juan Ignacio Valdez Hernández Todd S.Fredericksen 

作者机构：Instituto de Ciencias Agropecuarias y Rurales(ICAR)Universidad Autónoma del Estado de MéxicoInstituto Literario N°100Col.Centro.PO.Box 50000.TolucaMéxico Colegio de PosgraduadosCarretera México-TexcocoKm.36.5Montecillo.PO.Box 56230TexcocoMéxico School of Natural Sciences and MathematicsFerrum CollegeP.O.Box 1000Ferrum VA 24088USA 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2012年第23卷第1期

页      面：39-44页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0907[农学-林学] 0829[工学-林业工程] 09[农学] 0903[农学-农业资源与环境] 0901[农学-作物学] 

主　　题：forest structure human disturbance mountain forests 

摘      要：Sample plots were established in the principal forest types in the the Nevado de Toluca National Park, Mexico including those domi- nated by Pinus hartwegii, Abies religiosa, Quercus laurina and Alnus jorullensis. The vertical structure was defined by three strata in the coniferous forests and two strata in the broadleaved forests. Timber harvesting in Abies religiosa and Quercus laurina forests and fires generated by humans in Pinus hartwegii forests impeded the recruitment of saplings. Mature trees were also heavily impacted by logging in Pinus hartwegii forests. On the contrary, Alnusjorullensis forests were increas- ing due to the disturbance of Pinus and Quercus forests, as well aban- doned crop lands within the park. A combination of logging, uncon- trolled fire, and grazing appears to be compromising the recruitment of important tree species in this national park. These factors, together with human settlements, have also increased the proportion of early succes- sional species. Changes in forest structure from human disturbance indicate a need to control these activities if conservation goals are not to be compromised.