Excoecaria agallocha

About: Excoecaria agallocha is a research topic. Over the lifetime, 362 publications have been published within this topic receiving 5042 citations. The topic is also known as: Gewa.

Emission of Greenhouse Gases (CH4 and CO2) into the Atmosphere from Restored Mangrove Soil in South China

Abstract: Xu, Y.; Liao, B.; Jiang, Z.; Xin, K.; Xiong, Y., and Guan, W., 2021. Emission of greenhouse gases (CH4 and CO2) into the atmosphere from restored mangrove soil in South China. Journal of Coastal Research, 37(1), 52–58. Coconut Creek (Florida), ISSN 0749-0208.Mangroves are a special ecosystem in tropical and subtropical coastal areas. Currently, it is not adequately understood whether soils in restored mangroves are a substantial source of greenhouse gases. The objectives of this study were to determine whether restored mangrove soils are a substantial source of carbon dioxide (CO2) and methane (CH4) and to identify environmental factors affecting soil CO2 and CH4 fluxes in mangrove sites. From August 2019 to January 2020, CO2 and CH4 flux surveys were conducted in soils at four planted mangrove sites, dominated by Excoecaria agallocha, Kandelia obovata, Bruguiera gymnorrhiza, and Hymenocallis littoralis, respectively, in a mangrove reserve in southern China. The results showed that the CO2 and CH4 flux ranges of the four mangrove sites were 0.9432–1.7892 mmol m–2 h–1 and –0.104 to 0.845 µmol m–2 h–1, respectively. Soil CO2 flux was strongly positively (p < 0.01) correlated with soil organic carbon content and positively correlated (p < 0.05) with soil total N content, temperature, and redox potential. CH4 flux was positively correlated with soil temperature. The results confirm that these restored mangrove soils are only a small greenhouse gases source to the atmosphere.

Novel Diterpenes, Excoecarins M and N from the Resinous Wood of Excoecaria agallocha

Abstract: Two novel diterpenes, excoecarin M and N, were isolated from the resinous wood of Excoecaria agallocha. The structure determination was mainly based on 1D and 2D NMR spectroscopy. The structure of compound 2 was confirmed by X-ray analysis.

Ecological study on the mangrove communities in beilunhekou national nature reserve

Abstract: Ecological characteristics of habitat condition,flora,type,physiognomy,structure,species diversity and succession of mangrove communities in Beilunhekou National Nature Reserve,Guangxi,were systematically analyzed.14 species of mangrove plants,belonging to 11 families and 14genera,were found in the Reserve.Among them,11 species are true mangrove and 4 species are semi-mangrove.The true mangrove communities can be classified into 8 formations and 14 community types,and the main constructive species are Acrostichum aureum,Avicennia marina,Aegiceras corniculatum,Kandelia candel,Bruguiera gymnorrhiza,Excoecaria agallocha,Acanthus ilicifolius and Heritiera littoralis,respectively.The semi-mangrove communities can be classified into 2 formations and 2 community types,and the main constructive species are Hibiscus tiliaceus and Cerbera manghas,respectively.The Simpson index (D) of species diversity for the mangrove communities range from 1.09 to 5.34,Shannon-Weiner index (H) from 0.25 to 2.56,probability of interspecific encounter (PIE) from 0.08 to 0.82,and evenness (E) from 0.25 to 0.95.

Mangrove Vegetation and Water Quality Conditions in the Coastal Area of Seruyan Regency, Central Kalimantan

Abstract: The aim of this study was 1) to assess the mangrove vegetation condition from mangrove distribution and composition and Importance value index (IVI), and 2) to assess the water quality from physico-chemical parameters and primary productivity in the coastal waters of Seruyan Regency The study was carried out from December 2012 to May 2013, on 3 mangrove zones or habitats in the coastal area of Seruyan Regency, Central Kalimantan, ie Zone I (Sungai Bakau Village), Zone II (Kuala Pembuang II Village); and Zone III (Sungai Gintung Village) Data were obtained by Line Tansect Plot method, population sampling of an ecosystem with sample plot approach along the line put from the coastal line toward the land Vegetation diversity showed that mangrove distribution in the study site was structured by 5 species, Avicennia marina, Excoecaria agallocha L, Nypa fruticans, Rhizophora apiculata, and Sonneratia caseolaris Zone I (Sungai Bakau village) had 16 individuals (696%) of N fruticans and 7 individuals (304%) of S caseolaris, with a density of 6 ind/100 m2 Zone II (Kuala Pembuang II village) had 66 individuals (892%) of A marina,4 individuals (54%)of E agallocha and 4 individuals (54%) of R apiculata, with a density of 15 ind/100 m2 Zone III (Sungai Gintung village) had only A marina as many as 30 individuals (100 %) The mangrove density was 10 ind/100 m2 Moreover, the importance value index in zone I was 1514 for N fruticans and 1486 for S caseolaris In zone II, the highest IVI occurred in A marina (2317), followed by E agallocha (500) and Rhizophora apiculata (183) In zone III, since A marina was the only spesies found, the IVI was 3000 Mangrove productivity was 100 gr C/m2/yr in zone I, 6398 gr C/m2/yr in zone II, and 3536 gr C/m2/yr in zone III, respectively Physico-chemical parameters, such as temperature, pH, DO, and total suspended solid still met the provision of Minister’s Decree for Living Environment No 51, 2004 Except that nitrate (N-NO3) and phosphate (P-PO4) exceeded provision of seawater quality standard, 0008 mg/l for nitrate (N-NO3) and 0015 mg/l for phosphate (P-PO4)