Spatial Distribution of Some Chemical Characteristics of an Acid Sulfate Soil-Affected Brackishwater Ponds in the Coastal Area of Luwu Regency South Sulawesi Province

Abstract

Spatial distribution of brackishwater pond soil has important role in the system of bioenvironment including brackishwater pond environment. This research was aimed to determine the spatial distribution of some chemical characteristics of an acid sulfate soil-affected brackishwater pond in coastal area of Luwu Regency South Sulawesi Province, Indonesia. ALOS AVNIR-2 images (acquisition 16 May 2008, 16 October 2008, 17 September 2009) were integrated with Indonesian Topographic maps to obtain base map. Sampling soil points were determined by simple random sampling in 104 points for two different soil depths i.e. 0-0.2 m and 0.5-0.7 m. A total of 18 soil chemical characteristics was measured in the field and analyzed in the laboratory. Geostatistic using kriging method in the ArcGIS 9.3 software was used to interpolate the data. The results of this study indicated that in general pond soil chemical characteristics in Luwu Regency could be categorized with high variability or relatively heterogenic wi th the value of var iation coefficient more than 36%. The soil characteristics that explain acidity had shown similar pattern in spatial distribution as well as other soil characteristics with soil nutrient. The high value of pH and low value of PO4 were generally found in the northern part of Luwu Regency, including East Lamasi, East Walenrang, Bua, and Ponrang Subdistricts. It is recommended that soil management in brackishwater ponds of Luwu Regency could be based on soil chemical characteristics so its could improve the production through minimizing the input, increasing carrying capacity, and avoiding environmental degradation.

Coastal Community Perception of Mangroves in Suli Subdistrict, Luwu

“…Studies of mangroves have been conducted by many researchers in the world such as the socio-cultural perception of mangroves (de Souza Queiroz et al, 2017), conservation strategies and local perception in the Indian Sundarban mangrove forests (Ghosh et al, 2015), economic valuation of mangroves for comparison with commercial aquaculture in South Sulawesi (Malik et al, 2015), and perceptions of environmental changes and lethargic crab disease among crab harvesters in a Brazilian coastal community (Firmo et al, 2011). However, we have not come across research on comprehensive community perceptions about mangroves in Luwu regency in the literature, in which, the references only focus on a few aspects of mangrove forest as what has been investigated by Maru et al (2016) and Ratnawati & Mustafa (2014).…”

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“…Currently, Indonesia is still one of the important exporting countries in Asia because seaweed grows and spreads in almost all Indonesian area. The types that are widely used are red and brown algae because they contain agar, carrageenan, porpiran, and furcelaran whose end products play a very important role in the food, cosmetic and pharmaceutical industries [1].…”