b s t r a c t
This study identifies a potentially effective rehabilitation technique for implementation in high erosion
areas through the use of bioindicators. This is significant given that one third of mangroves have been
cleared globally with clearing continuing at a rate of 1e2% per annum. There have been various attempts
to rehabilitate degraded mangrove forests, however the success or failure of these is mostly unclear due
to a lack of assessment. The two rehabilitation techniques assessed in this study were a basic fence
system and another more elaborate fence technique designed by the Kien Giang Biosphere Reserve
Project (KGBRP), Vietnam. The assessment was conducted by comparing vegetation and faunal communities
in rehabilitation areas to those in adjacent old-growth areas. The indicators included: tree and
understory plant diversity and density; forest cover and the density of crabs, mudskippers and gastropods.
The results show the KGBRP rehabilitation fence technique delivered tree diversity, plant diversity,
tree density and forest cover that most closely resembled old-growth areas. This suggests that the
additional protection provided by the KGBRP fence was instrumental in achieving these results. In terms
of total mudskipper, Boleophthalmus spp., Periophthalmodon spp. and ocypodid crab density, the KGBRP
rehabilitation was most similar to the old-growth areas. This similarity is thought to be related to the
comparable forest cover at these sites. The density of large crab holes was much higher in old-growth
areas than in basic or KGBRP rehabilitation areas. The disparity between large crab hole density at
KGBRP rehabilitation and old-growth areas, despite similar levels of forest cover, is thought to be linked
to the immaturity of the KGBRP rehabilitation sites. As the KGBRP rehabilitation is most similar in terms
of vegetation and faunal communities to the old-growth areas, it appears to be the most successful
rehabilitation.
bstract b s t r a c t
การศึกษาครั้งนี้ระบุเทคนิคการฟื้นฟูที่มีประสิทธิภาพสำหรับการดำเนินงานที่อาจเกิดขึ้นในการชะล้างพังทลายสูงพื้นที่ผ่านการใช้ดัชนีชี้วัด This study identifies a potentially effective rehabilitation technique for implementation in high erosion
areas through the use of bioindicators. This is significant given that one third of mangroves have been
cleared globally with clearing continuing at a rate of 1e2% per annum. There have been various attempts
to rehabilitate degraded mangrove forests, however the success or failure of these is mostly unclear due
to a lack of assessment. The two rehabilitation techniques assessed in this study were a basic fence
system and another more elaborate fence technique designed by the Kien Giang Biosphere Reserve
Project (KGBRP), Vietnam. The assessment was conducted by comparing vegetation and faunal communities
in rehabilitation areas to those in adjacent old-growth areas. The indicators included: tree and
understory plant diversity and density; forest cover and the density of crabs, mudskippers and gastropods.
The results show the KGBRP rehabilitation fence technique delivered tree diversity, plant diversity,
tree density and forest cover that most closely resembled old-growth areas. This suggests that the
additional protection provided by the KGBRP fence was instrumental in achieving these results. In terms
of total mudskipper, Boleophthalmus spp., Periophthalmodon spp. and ocypodid crab density, the KGBRP
rehabilitation was most similar to the old-growth areas. This similarity is thought to be related to the
comparable forest cover at these sites. The density of large crab holes was much higher in old-growth
areas than in basic or KGBRP rehabilitation areas. The disparity between large crab hole density at
KGBRP rehabilitation and old-growth areas, despite similar levels of forest cover, is thought to be linked
to the immaturity of the KGBRP rehabilitation sites. As the KGBRP rehabilitation is most similar in terms
of vegetation and faunal communities to the old-growth areas, it appears to be the most successful
rehabilitation.
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