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3 documents found tagged asclepiadaceae [X]
  • Title
    Butterflies of Sundarban Biosphere Reserve, West Bengal, eastern India: a preliminary survey of their taxonomic diversity, ecology and their conservation
    Type
    Journal Article
    Description
    The Indian Sundarbans, part of the globally famous deltaic eco-region, is little-studied for butterfly diversity and ecology. The present study reports 76 butterfly species belonging to five families, which is a culmination of 73 species obtained from surveys conducted over a period of three years (2009-2011) in reclaimed and mangrove forested areas and three species obtained from an earlier report. Six of these species are legally protected under the Indian Wildlife (Protection) Act, 1972. Random surveys were employed for both the study areas, supplemented by systematic sampling in reclaimed areas. The reclaimed and forested areas differed largely in butterfly richness (Whittaker’s measure of ß diversity = 0.55). For sample-based rarefaction curves, butterfly genera showed a tendency to reach an asymptote sooner than the species. Numerous monospecific genera (77.19% of the taxa) resulted in a very gentle but non-linear positive slope for the species-genus ratio curve. A species-genus ratio of 1.33 indicated strong intra-generic competition for the butterflies of the Indian Sundarbans. Mangrove areas were species poor, with rare species like Euploea crameri, Colotis amata and Idea agamarshchana being recorded in the mangrove area; while Danaus genutia was found to be the most frequent butterfly. Butterfly abundance was very poor, with no endemic species and the majority (53.9% of the taxa; n=41) were found locally rare. The changing composition of butterflies in the once species-poor mangrove zone of the fragile Sundarbans may interfere with their normal ecosystem functioning.
    Attribution
    Chowdhury S. (2014). Journal of Threatened Taxa 8(6) pp. 6082-6092; doi:10.11609/JoTT.o3787.6082-92
  • Title
    Xerophyte Caralluma stalagmifera var. longipetala (Asclepiadaceae): a new record to the flora of Karnataka, India
    Type
    Journal Article
    Description
    Caralluma stalagmifera C.E.C. Fisch. var. longipetala Karupp. & Pull., is reported for the first time from the state of Karnataka, with descriptive notes and illustrations..
    Attribution
    Naik M.R., Krishnamurthy Y.L. (2012). Journal of Threatened Taxa 6(4) pp. 2656-2659; doi:10.11609/JoTT.o2898.2656-9
  • Title
    A report of the threatened plant Decalepis hamiltonii Wight & Arn. (Asclepiadaceae) from the mid elevation forests of Pachamalai Hills of the Eastern Ghats, Tamil Nadu, India
    Type
    Journal Article
    Description
    The Pachamalai Hills are a part of the Eastern Ghats and are situated in the central region of Tamil Nadu. The vegetated area is distributed into 35 reserved forests of Pachamalai Hills. The plant Decalepis hamiltonii Wight & Arn. is one of the threatened plant found in the study area. This indicates that the Pachamalai Hills can harbour good vegetation which are the vestiges of a luxuriant vegetation cover of the past era, hence, need to be protected. The hills are most significant socio-culturally because of the diversified forest patches found there. These hills have been studied earlier mainly for floristic analysis. Before this, D. hamiltonii has not been collected from Pachamalai.
    Attribution
    Anburaja V., Nandagopalan V., Prakash S., Prabha A.L. (2012). Journal of Threatened Taxa 15(4) pp. 3447-3449; doi:10.11609/JoTT.o3053.3447-9