Natural improvements of geochemical conditions of acid sulfate soils caused by free tidal inundation and its effects on the mangrove seedlings

Isyrini, Rantih, Gust, David, Williamson, Ian, Scharaschkin, Tanya, & Noor, Alfian (2012) Natural improvements of geochemical conditions of acid sulfate soils caused by free tidal inundation and its effects on the mangrove seedlings. In The Asian Conference on Sustainability, Energy & the Environment : Official Conference Proceedings 2012, The International Academic Forum (IAFOR), Osaka, Japan, pp. 361-367.

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Abstract

Acid sulfate soils (ASS) are one of the stressor factors that cause many mangrove restoration projects to fail. Achieving successful rehabilitation in an ASS affected area requires an understanding of the geochemical conditions that influence the establishment and growth of mangrove seedlings. This study evaluated the effect of tidal inundation on geochemical conditions on sub layer to better understand their impacts on the density, establishment, and growth of mangrove seedlings. This study also examined the geochemical conditions under which mangrove seedlings can establish naturally, and/or be replanted in abandoned aquaculture ponds.

The study area was in an area of abandoned aquaculture ponds situated in the Mare District, adjacent to Bone Bay, South Sulawesi, Indonesia.The pH, pHfox, redox potential, organic content, water soluble sulfate, SKCl, SPOS, and grain size of the soil from the sediment core at + 10 - 15 cm depth near roots were measured using. Pyrite analysis were conducted for the top and sub sediments. The density, establishment, and the relative root growth of Rhizophoraceae were also determined.

Free tidal inundation at abandoned pond sites improved the sediment quality. The high density, establishment, and growth of mangrove seedlings were characterized by freely drained areas with a higher pH (field and oxidisable), lower organic content, and high proportion of silt/clay. Higher density and growth also correlated to reduced environments. Sulfur species did not influence the density, establishment, and growth of the seedlings directly. The supply of propagules from the mangrove stands, or access from good waterways were also important for seedlings to establish naturally.

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ID Code: 56158
Item Type: Conference Paper
Refereed: Yes
Keywords: acid sulfate soils, establishment, geochemical, mangrove seedlings, tidal inundation
ISSN: 2186-2311
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > GEOCHEMISTRY (040200)
Australian and New Zealand Standard Research Classification > ENVIRONMENTAL SCIENCES (050000)
Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000)
Divisions: Current > Schools > School of Earth, Environmental & Biological Sciences
Past > Institutes > Institute for Sustainable Resources
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 The International Academic Forum (IAFOR)
Deposited On: 23 Dec 2014 01:55
Last Modified: 14 Jan 2015 02:01

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