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The plant height was 8 % higher in Rhizophora mucronata than that in Avicennia marina. As it is always better to keep the model simple in the real-world application, the model B was selected as the best model for Rhizophora mucronata. Propagules, those about to detach from trees were collected in August, 2013 in Pambala lagoon, Sri Lanka (7°34’N, 79°48’E) to use in the experiment. The total height ranged from 3.5 m to 12.1 m. The merchantable stem height and crown height ranged from 2.3 m to 8.8 m and 0.5 m to 6.9 m respectively. There was no significant difference of the mean measured stem carbon content and the mean predicted stem carbon content from the allometric equations developed for Rhizophora mucronata (Table 5, Student’s t test, ). However, the carbon sequestration potential of Rhizophora mucronata is not widely researched in the tropical mangrove ecosystems. Price, J. S. Weitz, V. M. Savage et al., “Testing the metabolic theory of ecology,”, M. D. Amarasinghe and S. Balasubramaniam, “Net primary productivity of two mangrove forest stands on the northwestern coast of Sri Lanka,” in, M. A. D. Umayangani and K. A. R. S. Perera, “Contribution of vegetation structure on carbon assimilation capacity of mangrove ecosystem: a case study from negombo estuary, Sri Lanka,”. Tree allometry is an important tool for estimating tree weight from independent variables such as trunk diameter, tree height, crown height, total height that are easily measurable in the field. rivers. B. Kauffman et al., “The potential of Indonesian mangrove forests for global climate change mitigation,”. The total leaf area of the sampled trees ranged from 1.7 m 2 to 50.5 m 2. The highest percentage increase of mean stem carbon content was observed between the DBH classes 1 and 2. For the best fit model, the explanatory variable DBH was statistically significant and the high R2 value of the best fit model indicated that the dependent variable which is the stem carbon content of Rhizophora mucronata can be explained up to high percentage (more than 60%) by the selected explanatory variable, which is DBH. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. On the fringes of the sea 10 or 15 metres is a more typical height. Rhizophora mucronata is a small to medium size evergreen tree growing to a height of about 20 to 25 metres (66 to 82 ft) on the banks of rivers. Only 75% of data were used in construction of the model while other 25% of data were used in model validation. Rhizophora mucronata belongs to family Rhizophoraceae. In Rhizophora mucronata, the bacterial treatment increased the shoot height growth at different levels of salinity. Menurut Hughes (2002) sistem kekebalan tubuh rentan terhadap kerusakan oksidatif, hal ini disebabkan karena sel imun memproduksi komponen-komponen reaktif sebagai bagian dari mekanisme pertahanan tubuh.Efektivitas kerja sistem imun sangat bergantung pada komunikasi antar sel melalui reseptor … Rep., U.S. Agency for International Development, Program in Science and Technology Cooperation, Washington, DC, USA, 1990, Interim Report. This carbon is fixed by photosynthesis and comparatively high carbon content can be stored in the stem of the trees compared to the leaves. The best fitted model was evaluated using quantitative and qualitative evaluation methods as described by Subasinghe and Haripriya [15]. The residuals values for Rhizophora mucronata were calculated as the difference between the actual stem carbon content and predicted stem carbon content from the model. mangrove area of Muara Angke Jakarta using Rhizophora mucronata seedlings with spacings of 0.25 m x 0.25 m, 0.5 m x 0.5 m, and 1 m x 1 m. Schimp. The most common tropical mangrove genera include Avicennia, Rhizophora, Bruguiera, and Sonneratia. 418. The reliability of the model was 76.7%, and the model was significant at 95% level of significance. Height distribution analysis showed that eighty-eight percent (88%) of the mangroves were 8.5m high and mostly consisted A. marina, R. apiculata and R. mucronata.Very few tall trees (16m above high) were encountered and this comprised only 1% of the total population. In order to find whether the explanatory variables were related to each other, multicollinearity was checked. In the model A, total height (VIF = 22.20), stem height (VIF = 10.22), and crown height (VIF = 9.75) indicate high multicollinearity. MAI of stem diameter and height of R. mucronata and A. marina seedlings Species Spacing (m) MAI Stem Diameter (mm/yr) Height (cm/yr) Rhizophora mucronata 1 x 1 20,94 a 19,23 a 0,5 x 0,5 20,82 a 15,78 a thesis. The present study can be considered as the initial attempt to use a non-destructive method to construct an allometric equation to predict the stem carbon content of Rhizophora mucronata in a tropical conserved mangrove forest. The authors declare that there are no conflicts of interest regarding the publication of this article. Two models (Model A and Model B) were constructed from the stepwise regression with backward elimination method: Model A: Ln C = −1.545–2.122 Ln TH + 2.020 Ln MSH + 0.874 Ln CH + 2.011 Ln DBH Model B: Ln C = −2.403 + 2.247 Ln DBHHere, C: stem carbon content, TH: total height, MSH: merchantable stem height, CH: crown height, and DBH: diameter at breast height. The approximate global area covered by mangrove forests is estimated to be 140,000 km2 with the highest extent of mangroves occurring in Asia (42%), followed by Africa (20%) and North and Central America (15%) [2]. The model bias and modelling efficiency values for the best fitted model of Rhizophora mucronata was used for the evaluation of the model. The values within the parentheses indicate the range of each parameter. The tree has a large number of Stepwise regression with backward elimination was used to construct an allometric equation for the stem carbon content of Rhizophora mucronata. However, the removal of plants from their natural ecosystem can have detrimental effects to the global climate and therefore currently it is not encouraged to remove plants even for the research purposes. Therefore, it is very important to measure the carbon content of the tree stems, in order to estimate the role of a particular tree species in removal of excessive carbon dioxide from the atmosphere. Measured and predicted stem carbon content of, Allometric Modelling of the Stem Carbon Content of, Department of Zoology and Environmental Management, Faculty of Science, University of Kelaniya, Dalugama, Kelaniya, Sri Lanka, International Journal of Forestry Research, Percentage increase of mean stem carbon content compared to previous diameter class (%), C. Giri, E. Ochieng, L. L. Tieszen et al., “Status and distribution of mangrove forests of the world using earth observation satellite data,”, W. Giesen, S. Wulffraat, M. Zieren, and L. Scholten, “Mangrove guidebook for southeast Asia,”, A. E. Schwarzbach and R. E. Ricklefs, “Systematic affinities of Rhizophoraceae and Anisophylleaceae, and intergeneric relationships within Rhizophoraceae, based on chloroplast DNA, nuclear ribosomal DNA, and morphology,”, J. Kumar, M. E. Vijey Kumar, K. B. Ranjanna et al., “Ecological benefits of mangrove,”, N. H. Tri, W. N. Adger, and P. M. Kelly, “Natural resource management in mitigating climate impacts: the example of mangrove restoration in Vietnam,”, D. M. Alongi, “Mangrove-microbe-soil relations,” in, D. M. Alongi and P. Dixon, “Mangrove primary production and above-and below-ground biomass in Sawi Bay, southern Thailand,”, D. M. Alongi, “Mangrove forests: resilience, protection from tsunamis, and responses to global climate change,”, K. Dhanwantri, P. Sharma, S. Mehta, and P. Prakash, “Carbon sequestration, its methods and significance,”, D. Murdiyarso, J. Purbopuspito, J.

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