We investigated the composition of plant communities to quantify their relationships with environmental parameters in the Chitral Hindukush range of Pakistan. We sampled tree vegetation using the Point Centered Quart...We investigated the composition of plant communities to quantify their relationships with environmental parameters in the Chitral Hindukush range of Pakistan. We sampled tree vegetation using the Point Centered Quarter （PCQ） method while understory vegetation was sampled in 1.5-m circular quadrats. Cedrus deodara is the national symbol of Pakistan and was dominant in the sampled communities. Because environmental variables determine vegetation types, we analyzed and evaluated edaphic and topographic factors. DCA-Ordination showed the major gradient as an amalgam of elevation （p〈0.05） and slope （p〈0.01） as the topographic factors correlated with species distribution. Soil variables were the factors of environmental significance along DCA axes. However, among these factors, Mg2＋ , K ＋ and N2＋ contributed not more than 0.054% 0.20% and 0.073%, respectively, to variation along the first ordination axis. We conclude that the principal reason for weak or no correlation with many edaphic variables was the anthropogenic disturbance of vegetation. The understory vegetation was composed of perennial herbs in most communities and was most dense under the tree canopy. The understory vegetation strongly regulates tree seedling growth and regeneration patterns. We recommend further study of the understory vegetation using permanent plots to aid development of forest regeneration strategies.展开更多
Field studies from industrial belts in Calcuttahave been carried out with 130 male workersaddicted to tobacco habits.Blood samples havebeen collected with detailed history of tobaccoaddiction i.e.type and duration Chr...Field studies from industrial belts in Calcuttahave been carried out with 130 male workersaddicted to tobacco habits.Blood samples havebeen collected with detailed history of tobaccoaddiction i.e.type and duration Chromosomalalterations with SCE following leucocyte展开更多
The Indian Myxomycetes Database(IMD)is the first on-line database of information on Myxomycetes in India.The database contains 394 records from 11 families,50 genera and 351 species,and can be accessed at www.fungifro...The Indian Myxomycetes Database(IMD)is the first on-line database of information on Myxomycetes in India.The database contains 394 records from 11 families,50 genera and 351 species,and can be accessed at www.fungifromindia.com.Every species from this much neglected group of fungi has been given a unique identity number that can be cited in publications where a new species is described.Every entry in this database has been linked with the globally recognized myco-database(www.mycobank.org).The IMD is part of an Indian initiative to promote international biodiversity documentation and form a global network of databases on biological information.展开更多
A new species,Amazonia atlantiicola,infecting leaves of Atlantia sp.(Rutaceae),was collected from Malabar Wildlife Sanctuary of Kozhikode district.It is introduced,described and illustrated in this paper.
基金supported by the Higher Education Commission of Pakistan
文摘We investigated the composition of plant communities to quantify their relationships with environmental parameters in the Chitral Hindukush range of Pakistan. We sampled tree vegetation using the Point Centered Quarter （PCQ） method while understory vegetation was sampled in 1.5-m circular quadrats. Cedrus deodara is the national symbol of Pakistan and was dominant in the sampled communities. Because environmental variables determine vegetation types, we analyzed and evaluated edaphic and topographic factors. DCA-Ordination showed the major gradient as an amalgam of elevation （p〈0.05） and slope （p〈0.01） as the topographic factors correlated with species distribution. Soil variables were the factors of environmental significance along DCA axes. However, among these factors, Mg2＋ , K ＋ and N2＋ contributed not more than 0.054% 0.20% and 0.073%, respectively, to variation along the first ordination axis. We conclude that the principal reason for weak or no correlation with many edaphic variables was the anthropogenic disturbance of vegetation. The understory vegetation was composed of perennial herbs in most communities and was most dense under the tree canopy. The understory vegetation strongly regulates tree seedling growth and regeneration patterns. We recommend further study of the understory vegetation using permanent plots to aid development of forest regeneration strategies.
文摘Field studies from industrial belts in Calcuttahave been carried out with 130 male workersaddicted to tobacco habits.Blood samples havebeen collected with detailed history of tobaccoaddiction i.e.type and duration Chromosomalalterations with SCE following leucocyte
文摘The Indian Myxomycetes Database(IMD)is the first on-line database of information on Myxomycetes in India.The database contains 394 records from 11 families,50 genera and 351 species,and can be accessed at www.fungifromindia.com.Every species from this much neglected group of fungi has been given a unique identity number that can be cited in publications where a new species is described.Every entry in this database has been linked with the globally recognized myco-database(www.mycobank.org).The IMD is part of an Indian initiative to promote international biodiversity documentation and form a global network of databases on biological information.
文摘A new species,Amazonia atlantiicola,infecting leaves of Atlantia sp.(Rutaceae),was collected from Malabar Wildlife Sanctuary of Kozhikode district.It is introduced,described and illustrated in this paper.
