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Forest
structure and litter production of naturally re-generated white mangrove Avicennia
marina in sub-tropical estuarine coast
M.K. Abu Hena1*,
B. Japar Sidik1, M.H. Idris1, M.H. Nesarul2,
A. Aysha2, M.S. Islam2 and H. Nazmul2
1Department of
Animal Science and Fishery, Faculty of Agriculture and Food Sciences,
Universiti Putra Malaysia,
?Bintulu Sarawak
Campus, 97008 Bintulu, Sarawak, Malaysia
2Institute of
Marine Sciences and Fisheries, University of Chittagong, Chittagong-4331,
Bangladesh
*Corresponding
Author?s E-mail: hena71@yahoo.com
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Publication
Data
Paper received:
10 February 2014
Revised received:
16 September 2014
Accepted:
17 November 2014
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Abstract
The
present work deals with plant structure, phenology, litter production and
decomposition of mangrove Avicennia marina in the newly re-generated
mangrove forest in sub-tropical coast. The natural generation in this
accreted coastal land of mono-specific A. marina forest stand was prominent,
with 45% seedlings and 32% saplings. Peak flowering and fruiting were noticed
in May and August, respectively. Reproductive components contribute countable
percent into the total litter production during the peak flowering (60%) and
fruiting (86%) season. The percentage of leaf litter fall fluctuated
throughout the year and contributed 13-99% (73% in average) of the total
litter production of 11.53 tones ha-1yr-1. The total
litter production differed with season and influenced by local climate, pore
water salinity and phenology of the mangrove. The naturally generated young
(7 years) A. marina with 1.8 m height produced more leaf litter as
compared to similar tree height elsewhere. Decomposition rate was related to
season, with higher litter loss during rainy season which could help cycling
nutrients and support estuarine food web by supplying organic matter into the
sub-tropical coastal environment. ?
Key
words
Avicennia
marina, Mangrove litter, Newly re-generated forest
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