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Structural complexity and tree species composition of mangrove forests of the Andaman Islands, India

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Title Structural complexity and tree species composition of mangrove forests of the Andaman Islands, India
Not Available
 
Creator R. Kiruba Sankar
P. Krishnan
S. Dam Roy
J. Raymond Jani Angel
M. P. Goudham Bharathi
K. Lohith Kumar
P. Ragavan
M. Kaliyamoorthy
R. Muruganandam
S. Rajakumari
R. Purvaja
R. Ramesh
 
Subject Andaman and Nicobar Islands
Biodiversity
Conservation
Mangroves
Marine angiosperms
 
Description Not Available
This study reports the mapping, structural characteristics
and distribution of mangrove species of the Andaman
Islands. 79 mangrove patches were identified using Thiessen
polygons of which, 53 accessible patches were surveyed during
2014–2015. Multiple linear transects were laid at each of
the mangrove patches and data pertaining to diameter at breast
height, basal area and height were recorded for all mangrove
trees within a 10 × 10 m quadrat laid along the transects at
50 m intervals. Altogether, 178 quadrats were laid and 25
mangrove species representing 11 families and 14 genera were
recorded. Of the 3073 mangrove plants enumerated in the
present study, 96.06% were composed of trees (>4 m height),
1.99% of saplings (>1 m to ≤4 m height) and 1.95% of seedlings
(≤1 m height). The number of species per quadrat ranged
from 1 to 9 and majority of the quadrats had 2–3 species.
Density and basal area of mangrove trees ranged from
1252 ha−1 to 2200 ha−1 and 30.8 m2/ha to 59.6 m2/ha, respectively.
High diversity indices (Shannon-Wiener index ranged
from 1.65 to 2.24; Simpson index from 0.74 to 0.85 and
Pielou’s evenness index from 0.66 to 0.84) indicated greater
diversity and even dispersion of mangroves in the Islands. The
study also revealed that the mangrove forests of Andaman
Islands were characterized by a mixed species composition.
Most of the sites were represented by different combinations of dominant and co-dominant species, all from the family
Rhizophoraceae. The present study highlights the need for
conserving the mixed species mangrove forests of Andaman
and Nicobar Islands and development of location-specific
management plans for biodiversity conservation
Not Available
 
Date 2020-02-19T11:23:17Z
2020-02-19T11:23:17Z
2017-07-21
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/32109
 
Language English
 
Relation Not Available;
 
Publisher Springer