樊净山自然保护区黔金丝猴生境选择的研究

适宜的生境是珍稀濒危生物生存的决定性条件,对珍稀濒危生物生境的系统研究是生物多样性保护的前提。金丝猴是中国特有并且珍稀的濒危物种,黔金丝猴又是三种金丝猴中分布最为狭窄、对生境要求最为苛刻的一种。本文从黔金丝猴的最佳适宜生境、适宜生境和较适宜生境三个生境选择方面对生境内植物群落特征、环境因子、极端环境因子等进行了系统分析,对黔金丝猴的季节活动规律、活动区域和食物特点进行了系统的研究。结果表明常绿针阔混交林是黔金丝猴的最佳生存的植被群落,其最适宜的年均温度为8～15C,极端最低温度为-2.5C,极端最高温度为25C,最适宜生存的海拔高度为1500～1700m。在同一区域,植物多样性越多,越适宜黔金丝猴的生存。温度和食物是决定黔金丝猴种群活动范围大小的主要生境因子,海拔高度、植被群落特征、温度是黔金丝猴对生境选择的主要限制因子。图3表3参16。     

长白山高山冻原生态系统植被生物量分布和养分生物循环研究(英文)

A study was conducted to test the correlation between biomass and elevation and the differences in concentration and storks of nutrients among five vegetation types (Felsenmeer alpine tundra vegetation-FA, Lithic alpine tundra vegetation-LA, Typical alpine tundra vegetation-TA, Meadow alpine tundra vegetation MA, and Swamp alpine tundra vegetation-SA) on alpine tundra of Changbai Mountains,Jilin Province, China in growing seasons of 2003, 2004 and 2005. The biomass of 43 mono-species and soil nutrients in alpine tundra ecosystem were also investigated. Dominant species from Ericaceae (such as Rhododendron chrysanthum and Vaccinium jliginosum var.alpinum) were taken to analyze organ biomass distribution. Result showed that the biomass and elevation had a significant correlation (Biomass=-237.3 In(Elevation) 494.36; R2=0.8092; P＜0.05). No significant differences were found in phosphorus and sulphur concentrations of roots, stems and leaves among the five vegetation types. There were significant differences in nitrogen and phosphorus stocks of roots, stems and leaves and in sulphur stock of stems and leaves among TA, MA, and SA vegetation types (p＜0.05). The nutrient stock of five vegetations was averagely 72.46 kg·hm-2, of which N, P, S were 48.55, 10.33 and 13.61 kg·hm-2, respectively. Soil N and S concentrations in meadow alpine tundra soil type was significantly higher than those in other four soil types (Cold desert alpine tundra soil, Lithic alpine tundra soil, Peat alpine tundra soil, and Gray alpine tundra soil). Phosphorous concentration in SA type was higher (p＜0.05) than in other types. Soil nutrient stock (0-20cm) was averagely 39.59 t·hm-2, of which N, P, S were 23.74, 5.86, 9.99 t·hm-2, respectively.