文章基本信息

标题：Lluvia de semillas y emergencia de plántulas de Fagus grandifolia subsp. Mexicana en La Mojonera, Hidalgo, México
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作者：LAURO LÓPEZ MATA ; EDMUNDO GARCÍA MOYA ; OLIVIA GODÍNEZ IBARRA 等
期刊名称：Revista Mexicana de Biodiversidad
印刷版ISSN：1870-3453
出版年度：2009
卷号：78
期号：001
出版社：Instituto de Biología
摘要：FAGUS GRANDIFOLIA SUBSP. MEXICANA IS A SPECIES RESTRICTED TO SMALL POPULATIONS UNDER HIGH ANTHROPOGENIC PRESSURE. WITH THE AIM TO ATTAIN INFORMATION TO PROPOSE CONSERVATION STRATEGIES OF THIS SPECIES, THE SEED RAIN AND DEMOGRAPHY OF CURRENT-YEAR SEEDLINGS WERE ANALYZED AT LA MOJONERA, HIDALGO, MEXICO. A 4 800 M2 PLOT DIVIDED INTO 10 X 10 M QUADRANTS WAS ESTABLISHED. THE SEED RAIN, SEEDLING EMERGENCE, AND SURVIVAL WERE ANALYZED USING SEED TRAPS OF 0.5 M2 AND ADJACENT 1 M2 SUB-PLOTS. THE TOTAL SEED RAIN WAS 521 667 SEEDS HA-1. A HIGH PROPORTION OF SEEDS WERE UNSOUND (46.01%), FOLLOWED BY DAMAGED SEEDS (29.5%) AND ONLY 24.44% WERE SOUND. EMERGED SEEDLINGS FL UCTUATED FROM 1 TO 33 SEEDLINGS M2. AFTER 10 MONTHS, 2.8% OF EMERGED SEEDLINGS WERE ALIVE. SEEDLINGS THAT EMERGED FIRST SHOWED HIGHER SURVIVAL PROBABILITY. IMPORTANT MORTALITY CAUSES WERE HERBIVORY (34.44%), DAMPING-OFF (24.07%) AND UNKNOWN CAUSES (23.65%). THIS SPECIES PRESENTS THE GENERAL PATTERN OF TREE SPECIES IN SEEDLINGS SURVIVAL, SHOWING A HIGH MORTALITY RATE DURING THE FIRST YEAR.
关键词：mast year;seedling demography;seedling survival;mortality causes;año semillero;demografía de plántulas;supervivencia de plántulas;causas de mortalidad