Abstract
Production and decomposition of mangrove litter could contribute organic matter and nutrients to the coastal waters. This study was to estimate the extent to which the rehabilitated mangrove of Rhizophora mucronata and Sonneratia alba contribute organic matter. This study was conducted from November 2015 to January 2016. Litter traps were used to collect the litter production and litterbags to measure decomposition rates. The results showed that the average of litter production for Sonneratia alba and Rhizophora mucronata was 4,38 g.m-2.day-1 and 3,61 g.m-2.day-1, respectively. However, Sonneratia alba apparently showed higher decay rates compare with Rhizophora mucronata. Nutrients element (N and P) released were 321,2 kg.ha-1.years-1 and 47,45 kg.ha-1.years-1 for Sonneratia alba; and 131,4 kg.ha-1.years-1 and 13,14 kg.ha-1.years-1 for Rhizophora mucronata. Overall, this study indicated that the mangrove rehabilitation in the area study contributed insignificantly carbon restocking the affected area, although it was able to provide ecological functions of this mangrove ecosystem.
Highlights
Mangrove ecosystem is a unique habitat with a variety of functions, both ecologically and socio-economically
S.alba apparently showed higher decay rates compare with R. mucronata
This study indicated thatthe mangrove rehabilitation in the area study were contributed to organic matter production and nutrients to the coastal waters
Summary
Mangrove ecosystem is a unique habitat with a variety of functions, both ecologically and socio-economically. This coastal ecosystem has a very important role in supporting the fishery resources, such as the breeding, nursery and feeding grounds, and the protection of the diversity of aquatic biota (Bengen, 2004; Kumar et al, 2011). One hectare of mangrove is able to contributein fish production up to 672 kg/year (Mahmudi, 2010). High production of litters (leaves, stems, fruit, twigs, etc.) from mangrove vegetation play an important role leading to be a basic components of the food web as a source of organic matter (Bengen, 2004). The litter seem to be the largest contributor of essential nutrients for their own growth as well as supporting both marine and estuarine biota life
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