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Phytosociological analysis of Mangroves at Kannur District, Kerala
Investigation on floristic diversity of mangroves of Kannur indicated that the study area constituted 12 species under nine genera belonging to seven families. Rhizophoraceae represented maximum genera of four species. Phytosociological analysis revealed that Acanth...
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| Format: | Printed Book |
| Publicat: |
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCES
2011
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| Accés en línia: | http://10.26.1.76/ks/006159.pdf |
| Sumari: | Investigation on floristic diversity of mangroves of Kannur indicated that the study area
constituted 12 species under nine genera belonging to seven families. Rhizophoraceae
represented maximum genera of four species. Phytosociological analysis revealed that
Acanthus illicifolius registered highest density and relative density followed by Avicennia
officinalis. Whereas relative frequency was highest recorded for Avicennia officinalsi
followed by Acanthus illicifolius. Maximum relative basal area was represented by Aviennia
marina followed by Avicennia officinalis. Structural analysis of the mangroves of Kannur
unveiled the domination of Avicennia officinalis which, registered highest Importance value
index (IVI) and relative importance value index (RIVI) among the 12 mangroves species
distributed all over. Though this species constituted relatively lesser density and frequency, it
registered highest IVI and RIVI due to its relatively higher basal area. The lowest IVI and
RIVI was registered for Luminitzera racemosa. Diversity indices for six mangrove sites and
for whole Kannur district indicated that mangroves at Pappinisseri constituted highest
Shannon Weiner index and equitability (H’ 9.706, 3.75). Highest Simpson's index was
reported for Madakkara (0.847) and Kavayi registered lowest value for Shannon Weiner
index and H max (H’ 5.72, 2.585). |
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| Descripció física: | Volume 2, No 2, 2011 |