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Author O. R. Vetaas |
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Local factors influence herbaceous species diversity in macro scale / BHATTARAI, K.R. in BANKO JANAKARI - वनको जानकारी : A Journal of Forestry Information for Nepal, 15 : 2 (July - December 2005)
[article]
Title : Local factors influence herbaceous species diversity in macro scale Material Type: printed text Authors: BHATTARAI, K.R., Author ; O. R. Vetaas, Author Publication Date: 2005 Article on page: 26-32p. Languages : English (eng) Keywords: Nepalese alder vs Uttis, height, diameter, biomass, Pakhribas. Abstract: A long-term growth monitoring experiment on Uttis (Alnus nepalensis) was conducted in the permanent sample plots of the Agricultural Research Station (ARS) Pakhribas, Dhankuta for 10 years (1992-2001). The average annual increment was diameter at breast height 2.14 cm in 8th year, and was 0.13 cm at 16th year of planting. The trees grew 44 cm to 130 cm per year irrespective of the age. The highest growth rate correspondend with higher rainfall during summer (March-April). Estimated biomass of stem and branches increased by 2-2.5 times within the 10 years period. Thinning and felling every year indicated need for timely management of the plantation to provide better growing environment. The data would be useful for growth modelling and proper management of Uttis plantation in Nepal . Link for e-copy: http://lib.frtc.gov.np/elibrary/pages/view.php?ref=156&k=
in BANKO JANAKARI - वनको जानकारी : A Journal of Forestry Information for Nepal > 15 : 2 (July - December 2005) . - 26-32p.[article] Local factors influence herbaceous species diversity in macro scale [printed text] / BHATTARAI, K.R., Author ; O. R. Vetaas, Author . - 2005 . - 26-32p.
Languages : English (eng)
in BANKO JANAKARI - वनको जानकारी : A Journal of Forestry Information for Nepal > 15 : 2 (July - December 2005) . - 26-32p.
Keywords: Nepalese alder vs Uttis, height, diameter, biomass, Pakhribas. Abstract: A long-term growth monitoring experiment on Uttis (Alnus nepalensis) was conducted in the permanent sample plots of the Agricultural Research Station (ARS) Pakhribas, Dhankuta for 10 years (1992-2001). The average annual increment was diameter at breast height 2.14 cm in 8th year, and was 0.13 cm at 16th year of planting. The trees grew 44 cm to 130 cm per year irrespective of the age. The highest growth rate correspondend with higher rainfall during summer (March-April). Estimated biomass of stem and branches increased by 2-2.5 times within the 10 years period. Thinning and felling every year indicated need for timely management of the plantation to provide better growing environment. The data would be useful for growth modelling and proper management of Uttis plantation in Nepal . Link for e-copy: http://lib.frtc.gov.np/elibrary/pages/view.php?ref=156&k= Medicinal plants of Nepal: Distribution pattern along an elevational gradient and effectiveness of existing protected areas for their conservation / ACHARYA, K.P. in BANKO JANAKARI - वनको जानकारी : A Journal of Forestry Information for Nepal, 19 : 1 (January - June 2009)
[article]
Title : Medicinal plants of Nepal: Distribution pattern along an elevational gradient and effectiveness of existing protected areas for their conservation Material Type: printed text Authors: ACHARYA, K.P., Author ; CHAUDHARY, R.P., Author ; O. R. Vetaas, Author Publication Date: 2009 Article on page: 16-22 p Languages : English (eng) Keywords: Elevation gradient, generalized additive model, medicinal plants, species richness Abstract: This study explores patterns of medicinal plant species richness along an elevational gradient in Nepal and the effectiveness of existing protected areas for their conservation. We used published data on the distribution of medicinal plants. The number of medicinal plants and the number of protected areas present in each 100 m elevation band were collated by interpolation. We tested the number of protected areas and the number of species as the response variables against elevation as a predictor variable. To explain the relationship between the total medicinal plant richness and their different life forms with elevation and protected areas, we used generalized additive models (GAMs) and scatter plots. The elevational distribution of medicinal plants as a whole and disaggregated into different life forms revealed hump-shaped patterns. The maximum richness of medicinal plants was found at an elevation of 1100 m a.s.l. but the maximum numbers of protected areas were found at elevations between 3000-3500 m a.s.l. There was negative correlation between the altitudinal distribution of protected areas and medicinal plants in Nepal. This study suggests that the protected areas of Nepal were less concentrated where medicinal plants diversity was rich. Link for e-copy: http://lib.frtc.gov.np/elibrary/pages/view.php?ref=60&k=
in BANKO JANAKARI - वनको जानकारी : A Journal of Forestry Information for Nepal > 19 : 1 (January - June 2009) . - 16-22 p[article] Medicinal plants of Nepal: Distribution pattern along an elevational gradient and effectiveness of existing protected areas for their conservation [printed text] / ACHARYA, K.P., Author ; CHAUDHARY, R.P., Author ; O. R. Vetaas, Author . - 2009 . - 16-22 p.
Languages : English (eng)
in BANKO JANAKARI - वनको जानकारी : A Journal of Forestry Information for Nepal > 19 : 1 (January - June 2009) . - 16-22 p
Keywords: Elevation gradient, generalized additive model, medicinal plants, species richness Abstract: This study explores patterns of medicinal plant species richness along an elevational gradient in Nepal and the effectiveness of existing protected areas for their conservation. We used published data on the distribution of medicinal plants. The number of medicinal plants and the number of protected areas present in each 100 m elevation band were collated by interpolation. We tested the number of protected areas and the number of species as the response variables against elevation as a predictor variable. To explain the relationship between the total medicinal plant richness and their different life forms with elevation and protected areas, we used generalized additive models (GAMs) and scatter plots. The elevational distribution of medicinal plants as a whole and disaggregated into different life forms revealed hump-shaped patterns. The maximum richness of medicinal plants was found at an elevation of 1100 m a.s.l. but the maximum numbers of protected areas were found at elevations between 3000-3500 m a.s.l. There was negative correlation between the altitudinal distribution of protected areas and medicinal plants in Nepal. This study suggests that the protected areas of Nepal were less concentrated where medicinal plants diversity was rich. Link for e-copy: http://lib.frtc.gov.np/elibrary/pages/view.php?ref=60&k=