Aboveground Biomass Estimation of <i>Avicennia marina</i>(Forssk) Vierh. and <i>Rhizophora mucronata</i>Lam. in the Mangoky Delta, SW Madagascar

• 作者: Andriamparany Rakotomavo
• 来源期刊: 美国植物学期刊(英文)
• 学科: 医学
• 关键词: AVICENNIA marina ABOVEGROUND Biomass Mangoky DELTA Mangrove Allometric Relationships RHIZOPHORA mucronata
• 年，卷（期）: mgzwxqkyw_2018,（9）
• 页码范围: 1894-1910
• 页数: 17页
• 分类号: R73

摘要

Forty-three trees (23 Rhizophora mucronata and 20 Avicennia marina) were studied for the establishment of allometric relationships between the aboveground biomass “y” and the following dendrometric variables “x”: diameter at breast height DBH, (DBH)2 product Ht (where Ht is the total height), and the basal circumference Cb of the trees. The Log y = A Log [(DBH)2·Ht] + B equation gives a fairly satisfactory regression coefficient (R2 > 0.9) for the woody compartments. For A. marina, it is the equation Log y = A Log Cb + B that is the best correlated for the estimation of less woody compartments (R2 = 0.826 to 0.847). As for R. mucronata, these are much more related to DBH. For trees of 8 - 10 m height, the aboveground biomass of the delta is higher (171 t·ha-1 for R. mucronata) than that of Puerto Rico, but quite comparable to that of Australia (110 t·ha-1 for A. marina). The first tools for estimating aboveground biomass are given for these two characteristic species of the Indo-Pacific Region and East Africa. Because of the low values of the regression coefficients for some allometric relationships obtained, precautions should be taken in case of extrapolation.