The Micangshan Forest Park is located in the northeast edge of the Sichuan Basin. The wild animals and plants resources are rich and the ecosystem is integrity. There are well-preserved areas of native biological comm...The Micangshan Forest Park is located in the northeast edge of the Sichuan Basin. The wild animals and plants resources are rich and the ecosystem is integrity. There are well-preserved areas of native biological communities. Its strip and the region decided that on the one hand biological diversity is rich; on the other hand, there is its unique ecological fragility. Once it is destroyed, it would be very difficult to restore. In order to protect the ecological environment of wild animal and plant habitats and wild animal and plant resources, this paper uses quadrat survey procedure to carry on the investigation. In the Micangshan Forest Park's typical land sector the author establishes the sample area of 20 m×20 m to invest the tree layer of plant species and builds five 2 m×2 m the small quadrats along the type place's diagonal line machinery to invest bush level and the field layer floristic component. Again according to the Micangshan Forest Park's terrain, the vegetation and the difference humanity interference condition, the autor builds the different quantities separately the line transect to invest the animal type. This article through to eastern Sichuan Province north the Micangshan forest park biodiversity resources investigation, has analyzed the biodiversity protection work present situation and the existence question, and put forward the proposal to the next protection work.展开更多
Keibul Lamjao National Park （KLNP）, a floating park in Loktak Lake, Manipur （India） was studied from Winter （WIN） to Post Monsoon （POM） for its zooplankton composition and some selected water parameters. The r...Keibul Lamjao National Park （KLNP）, a floating park in Loktak Lake, Manipur （India） was studied from Winter （WIN） to Post Monsoon （POM） for its zooplankton composition and some selected water parameters. The resultant data were subjected to multivariate techniques---Principal Component Analysis （PCA） and Canonical Correspondence Analysis （CCA）. Analyses of water parameters with PCA revealed that the first PC axis （PC 1） accounts for maximum variance in the seasonal data, explaining a variability of 91%. The PCA revealed that the seasonal variability in water parameters was due to the wet and dry cycle of seasons and the stations were distinguished on the basis of transparency and turbidity. Zooplankton abundance was dominated by copepods followed by cladocerans. Temporally, abundance of copepods reached a maximum during Post-monsoon （POM） （3 880 ind./L）. Spatially, $6 was found to be most abundant of the other stations in zooplankton. Copepodites and nauplii larvae were the major components of zooplankton. The Rotifera were the least abundant among the three zooplankton groups. Brachionus formed the major component of Rotifera zooplankton at all the stations during the study period. In the Cladocera, Macrothrix was present during all the four seasons, while Pleuroxus, Oxyurella, Kurzia and, Diaphanosoma were rare. The CCA shows that maximal temporal variability in zooplankton abundance was explained by temperature and rainfall. ANOVA revealed no significant difference in mean zooplankton abundance among the seasons, but there was a statistically significant difference among the sites.展开更多
Camivores play a central role in ecosystem processes by exerting top-down control, while fire exerts bottom-up con- trol in ecosystems throughout the world, yet, little is known about how fire affects short-term carni...Camivores play a central role in ecosystem processes by exerting top-down control, while fire exerts bottom-up con- trol in ecosystems throughout the world, yet, little is known about how fire affects short-term carnivore distributions across the landscape. Through the use of a long-term data set we investigated the distribution of lions, during the daytime, in relation to burned areas in Serengeti National Park, Tanzania. We found that lions avoid burned areas despite the fact that herbivores, their prey, are attracted to burned areas. Prey attraction, however, likely results from the reduction in cover caused by burning, that may thereby decrease lion hunting success. Lions also do not preferentially utilize the edges of burned areas over unburned areas de- spite the possibility that edges would combine the benefit of cover with proximity to abundant prey. Despite the fact that lions avoid burned areas, lion territory size and reproductive success were not affected by the proportion of the territory burned each year. Therefore, burning does not seem to reduce lion fitness perhaps because of the heterogeneity of burned areas across the landscape or because it is possible that when hunting at night lions visit burned areas despite their daytime avoidance of these ar- eas .展开更多
文摘The Micangshan Forest Park is located in the northeast edge of the Sichuan Basin. The wild animals and plants resources are rich and the ecosystem is integrity. There are well-preserved areas of native biological communities. Its strip and the region decided that on the one hand biological diversity is rich; on the other hand, there is its unique ecological fragility. Once it is destroyed, it would be very difficult to restore. In order to protect the ecological environment of wild animal and plant habitats and wild animal and plant resources, this paper uses quadrat survey procedure to carry on the investigation. In the Micangshan Forest Park's typical land sector the author establishes the sample area of 20 m×20 m to invest the tree layer of plant species and builds five 2 m×2 m the small quadrats along the type place's diagonal line machinery to invest bush level and the field layer floristic component. Again according to the Micangshan Forest Park's terrain, the vegetation and the difference humanity interference condition, the autor builds the different quantities separately the line transect to invest the animal type. This article through to eastern Sichuan Province north the Micangshan forest park biodiversity resources investigation, has analyzed the biodiversity protection work present situation and the existence question, and put forward the proposal to the next protection work.
基金Supported by the University Grant Commission(UGC),New Delhi,India,under the Junior Research Fellowship(JRF-NET)scheme
文摘Keibul Lamjao National Park （KLNP）, a floating park in Loktak Lake, Manipur （India） was studied from Winter （WIN） to Post Monsoon （POM） for its zooplankton composition and some selected water parameters. The resultant data were subjected to multivariate techniques---Principal Component Analysis （PCA） and Canonical Correspondence Analysis （CCA）. Analyses of water parameters with PCA revealed that the first PC axis （PC 1） accounts for maximum variance in the seasonal data, explaining a variability of 91%. The PCA revealed that the seasonal variability in water parameters was due to the wet and dry cycle of seasons and the stations were distinguished on the basis of transparency and turbidity. Zooplankton abundance was dominated by copepods followed by cladocerans. Temporally, abundance of copepods reached a maximum during Post-monsoon （POM） （3 880 ind./L）. Spatially, $6 was found to be most abundant of the other stations in zooplankton. Copepodites and nauplii larvae were the major components of zooplankton. The Rotifera were the least abundant among the three zooplankton groups. Brachionus formed the major component of Rotifera zooplankton at all the stations during the study period. In the Cladocera, Macrothrix was present during all the four seasons, while Pleuroxus, Oxyurella, Kurzia and, Diaphanosoma were rare. The CCA shows that maximal temporal variability in zooplankton abundance was explained by temperature and rainfall. ANOVA revealed no significant difference in mean zooplankton abundance among the seasons, but there was a statistically significant difference among the sites.
基金We thank the Tanzania Wildlife Re- search Institute, Tanzania National Parks and Tanzania Com- mission for Science and Technology for permission to conduct research in the Serengeti. This work was supported by Na-tional Science Foundation grants DEB 0308486 to C.E and M.R., 9903416 and 0343960 to C.P., and 0543398, and 0842230 to M.R.
文摘Camivores play a central role in ecosystem processes by exerting top-down control, while fire exerts bottom-up con- trol in ecosystems throughout the world, yet, little is known about how fire affects short-term carnivore distributions across the landscape. Through the use of a long-term data set we investigated the distribution of lions, during the daytime, in relation to burned areas in Serengeti National Park, Tanzania. We found that lions avoid burned areas despite the fact that herbivores, their prey, are attracted to burned areas. Prey attraction, however, likely results from the reduction in cover caused by burning, that may thereby decrease lion hunting success. Lions also do not preferentially utilize the edges of burned areas over unburned areas de- spite the possibility that edges would combine the benefit of cover with proximity to abundant prey. Despite the fact that lions avoid burned areas, lion territory size and reproductive success were not affected by the proportion of the territory burned each year. Therefore, burning does not seem to reduce lion fitness perhaps because of the heterogeneity of burned areas across the landscape or because it is possible that when hunting at night lions visit burned areas despite their daytime avoidance of these ar- eas .
