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Population dynamics and considerations for the conservation of the rare Cycas fairylakea in China 被引量:1

Population dynamics and considerations for the conservation of the rare Cycas fairylakea in China
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摘要 Quantitative dynamics and viability of a rare and wild Cycas fairylakea population were studied with a time-specific life table, a Leslie matrix model and a survival function in order to provide scientific guidance for its protection. The results of the time- specific life table show that this C. fairylakea population suffered a high death rate in three age classes, i.e., age class 1 (0-15 years), V (61-75 years) and VI (76-90 years). The Leslie matrix model suggests that the number of plants would decline from the present 1613 to 59 per hectare in 150 years. Furthermore, the viability analysis indicates that seedlings have the highest mortality density rate and that middle-aged plants (i.e., 61-75 years, 76-90 years) have high mortality density rate and hazard rate. These conditions affect natural regeneration of the population and lead to a lack of seedlings which in turn causes the extinction of the population. An in situ conservation of the population should be established and protection measures taken as soon as possible. Quantitative dynamics and viability of a rare and wild Cycas fairylakea population were studied with a time-specific life table, a Leslie matrix model and a survival function in order to provide scientific guidance for its protection. The results of the time- specific life table show that this C. fairylakea population suffered a high death rate in three age classes, i.e., age class 1 (0-15 years), V (61-75 years) and VI (76-90 years). The Leslie matrix model suggests that the number of plants would decline from the present 1613 to 59 per hectare in 150 years. Furthermore, the viability analysis indicates that seedlings have the highest mortality density rate and that middle-aged plants (i.e., 61-75 years, 76-90 years) have high mortality density rate and hazard rate. These conditions affect natural regeneration of the population and lead to a lack of seedlings which in turn causes the extinction of the population. An in situ conservation of the population should be established and protection measures taken as soon as possible.
出处 《Forestry Studies in China》 CAS 2012年第2期118-123,共6页 中国林学(英文版)
关键词 Cycasfairylakea population rare species time-specific life table Leslie matrix model VIABILITY Cycasfairylakea population, rare species, time-specific life table, Leslie matrix model, viability
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