Sedimentation rate in mangroves with different characteristics
Supriadi Mashoreng (1*), Rahmadi Tambaru (1), Yayu Anugrah La Nafie (1)

(1) Faculty of Marine Science and Fisheries, Hasanuddin University, Makassar.
* smashoreng[at]gmail.com

Abstract

One of the roles of mangrove forest is their ability to deposit sediment. This roles can prevent excessive suspended sediments from reaching other ecosystems such as coral reefs. This study aims to analyze the rate of sedimentation in rehabilitated and natural mangroves. The research was conducted at two locations, namely the Lantebung mangrove area, Makassar which represents the mangrove rehabilitation and the Kuri Maros mangrove area which represents natural mangroves. Four stations were made at each location. Sequentially, Station 1 is closest to the mainland and Station 4 is furthest from the mainland. At each station, 6 sediment traps were installed which were made of 7.4 cm diameter and 20 cm high pipes. After 14 days the trapped sediment was taken and brought to the laboratory. The sediment was dried using an oven, then weighed to determine the weight and the volume was measured. The results showed that the sedimentation rate in the Lantebung mangrove area ranged from 1.03 to 69.93 g.m-2.day with an average of 28.13 g.m-2.day. Sedimentation rate in the Kuri mangrove area ranges from 18.22-251.68 g.m-2.day with an average of 93.42 g.m-2.day. The further outward (the sea), the higher the sedimentation rate.

Keywords: sedimentation rate, natural and rehabilitated mangrove, Lantebung Makassar, Kuri Maros.

Topic: Aquatic Biodiversity (International)