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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Sylva Lestari
Wongprom, Jetsada
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Veterinary

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Impact of Mangrove Land Use on the Carbon Stock in an Abandoned Shrimp Pond: A Case Study at Samut Songkhram Campus, Suan Sunandha Rajabhat University, Thailand Wongprom, Jetsada; Inthiraj, Anantachai; Songsin, Niwat; Somporn, Kanokporn; Pianjing, Prisna
Jurnal Sylva Lestari Vol. 13 No. 1 (2025): January
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v13i1.1074

Abstract

Changes in land use within coastal areas have significantly impacted the carbon stock of mangrove forests. This study examined three different land-use types including the abandonment of shrimp ponds characterized as restored mangrove forests (RMF), logged Avicennia marina (LAM) stands, and abandoned shrimp ponds (ASP) on the carbon stock in plant and soil. Eight experimental plots, each measuring 20 m x 20 m, were established in the RMF and LAM to assess the forest structure. The diameter and height of mangrove trees were measured, and both the above and belowground biomass were estimated. Three soil samples were collected randomly from each site at four different depths (0–15 cm, 15–30 cm, 30–50 cm, and 50–100 cm) to analyze the soil characteristics. Bulk density and carbon concentration were then determined from these samples. The Tukey test estimated and statistically analyzed vegetation, soil, and carbon stocks. The results indicate that the forest structure and biodiversity in RMF were higher than in LAM. Additionally, vegetation biomass and carbon stock in RMF exceeded the values estimated for LAM. The soil carbon stock at 0–100 cm depths across RMF, LAM, and ASP was similar, ranging from 204.52 to 220.20 t.C.ha-1. Nonetheless, the largest ecosystem carbon stock was estimated for RMF (306.52 t.C.ha-1), demonstrating the influence of land-use patterns on ecosystem carbon storage. According to the results, it might take longer for the ecosystem carbon in the abandoned shrimp pond in ASP to recover than it would in RMF and LAM. However, mangrove restoration in abandoned shrimp ponds is crucial to improve the forest structure, encourage ecological advantages, and accelerate carbon stock recovery. Keywords: abandoned shrimp pond, carbon stock, land use, mangrove forest, Samut Songkhram campus
GROWTH PERFORMANCE OF DIPTEROCARP SPECIES PLANTED ON ABANDONED MINING AREA IN SOUTHERN THAILAND Wongprom, Jetsada
BIOTROPIA Vol. 27 No. 2 (2020): BIOTROPIA Vol. 27 No. 2 August 2020
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2020.27.2.1173

Abstract

Dominant Dipterocarp trees hold a significant importance in the ecology and economics of the declining tropical forests of Asia. Of equal importance is the restoration of these Dipterocarp forest using the technique of matching species with silvicultural practices. The study aimed to investigate the effect of the Acacia mangium nurse trees on the survival and growth of six Dipterocarp species planted on abandoned mining areas in the Phangnga Forestry Research Station, Thailand, namely; Dipterocarpus alatus Roxb., Dipterocarpus gracilis Blume, Hopea odorata Roxb., Shorea gratissima (Wall. ex Kurz) Dyer, Shorea roxburghii G. Don, and Parashorea stellata Kurz. The approximately 1.5-year-old Dipterocarp seedlings were planted at a 6-year-old A. mangium plantation cover and at open plots. The survival rate, diameter at root collar (D0), total height (H) and the relative growth rate (RGR) of D0 and H of the seedlings were compared. Soil samples at the open and the A. mangium plots were collected and its physical and chemical properties were analyzed. The results indicated that the survival rates of the Dipterocarps planted at the A. mangium plot were higher than those at the open plots. The survival rates (75-100%) of the 1 to 3-year-old D. alatus, H. odorata, S. gratissima, S. roxburghii, and P. stellata were relatively high at the A. mangium plot, but not for D. gracilis. The D0 of S. roxburghii, D. alatus, H. odorata, and P. stellata were higher at the A. mangium plot. However, the D0 and H of S. roxburghii, D. alatus, and H. odorata at the open plot were high and similar to that of the A. mangium plot. RGRD0 and RGRH of S. roxburghii, D. alatus, and H. odorata were high both at the A. mangium and the open plots. Generally, the Dipterocarp seedlings were growing better under the A. mangium nurse trees, thus suggesting the possibility of their improved survival and growth in mined out areas. Moreover, the findings also suggest that S. roxburghii, D. alatus, and H. odorata can be planted at open areas with poor soil conditions and extreme environments. Lastly, thinning interventions are also needed to improve the growth of Dipterocarp trees.
SOIL PROPERTIES AND TREE COMPOSITION IN A 27-YEAR OLD Acacia mangium Willd. PLANTATION ON ABANDONED MINING AREA AT PHANGNGA FORESTRY RESEARCH STATION Wongprom, Jetsada; Poolsiri, Roongreang; Diloksumpun, Sapit; Ngernsaengsaruay, Chatchai
BIOTROPIA Vol. 27 No. 2 (2020): BIOTROPIA Vol. 27 No. 2 August 2020
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (33.834 KB) | DOI: 10.11598/btb.2020.27.2.1176

Abstract

In order to validate the important role of Acacia mangium plantation in mining rehabilitation, a study was conducted on the soil properties and tree composition in a 27-year-old A. mangium plantation growing on sandy (S27) and clay (C27) soil types, as well as a mixed plantation (MP) growing on clay soil type. The results were compared with those grown on an abandoned mining area (AB), a secondary forest (SF) and a primary forest (PF), at the Phangnga Forestry Research Station, Thailand. Three 40 x 40 m permanent plots were established and soil samples were randomly collected from depths of 0-10, 10-20, 20-30, and 30-50 cm, in each of the S27, C27, MP, AB, SF, and PF. The bulk density values in the S27, C27, and MP were lower than that in AB and was similar to those in SF and PF, particularly, the top soil. Total nitrogen, available phosphorus, organic matter, exchangeable potassium, and magnesium contents in the S27, C27, and MP were higher than that in AB, but were lower than those in SF and PF, indicating that the soil development in the S27, C27, and MP was slower than in the SF and PF. This lower bulk density values and higher soil nutrient contents were positively contributed by the A. mangium plantation. The Shannon-Wiener index obtained for S27 (1.43), C27 (2.51), and MP (2.77) were lower than that for the SF (3.86). The similarity indices of the tree species found in S27, C27, MP, and PF were low, ranging from 5.83-8.00, indicating that the development of the forest community was slow compared to SF (31.03). Enrichment planting with poorly dispersed shade tolerant trees has increased the diversity and improved the forest structure in the mined out areas and other similarly degraded lands.
LITTERFALL, LITTER DECOMPOSITION AND NUTRIENT RETURN OF REHABILITATED MINING AREAS AND NATURAL FOREST IN PHANGNGA FORESTRY RESEARCH STATION, SOUTHERN THAILAND Wongprom, Jetsada; Poolsiri, Roongreang; Diloksumpun, Sapit; Ngernsaengsaruay, Chatchai; Tansakul, Samita; Chandaeng, Wasan
BIOTROPIA Vol. 29 No. 1 (2022): BIOTROPIA Vol. 29 No. 1 April 2022
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2022.29.1.1627

Abstract

Litterfall and litter decomposition play important roles in the maintenance of nutrient cycling and rehabilitation of degraded lands. Litterfall, litter decomposition and nutrient return were investigated in a 27-year-old Acacia mangium plantation on sandy and clay sites, and in a mixed plantation at the Phangnga Forestry Research Station, Phangnga Province, Thailand. Additionally, secondary and primary forests were investigated and compared with the values obtained from the Acacia mangium and the mixed plantations. The results indicated that litter production in A. mangium plantation on sandy and clay sites, and in mixed plantations (15.47, 11.68 and 7.89 t/ha/yr, respectively) was higher than that in the secondary and primary forests (6.34 and 6.92 t/ha/yr, respectively). The rate of litter decomposition was the greatest in the secondary forest (3.01/yr) and the lowest occurred in the primary forest (1.15/yr). The decomposition rate of the mixed leaf litter between native trees and A. mangium in plantations was higher than that of only A mangium leaf, except in the mixed plantations. A high initial nitrogen concentration in A. mangium could accelerate litter decomposition and improve litter quality in the mixed litter. In addition, the nutrient return in plantations was higher than that in the secondary and primary forests, especially for N. Increased litter production, high decomposition rate and nutrient return from A. mangium plantation had important roles in nutrient cycling, suggesting that a mixed plantation consisting of A. mangium and native trees should be considered for the reclamation of mining land.
EFFECT OF THINNING ON GROWTH AND WOOD PRODUCTION OF NATURALLY REGENERATED 8-YEAR-OLD ACACIA MANGIUM WILLD. PLANTATION ON ABANDONED MINING AREA, SOUTHERN THAILAND Wongprom, Jetsada; Maelim, Somporn; Chandaeng, Wasan; Teejuntuk, Sakhan; Sommeechai, Monthathip; Duangnamon, Decha
BIOTROPIA Vol. 30 No. 3 (2023): BIOTROPIA Vol. 30 No. 3 December 2023
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2023.30.3.1919

Abstract

Thinning is an important practice for promoting growth and maintaining forest plantation for wood production from the remaining trees. In this study, thinning was carried out in a naturally regenerated 8-year-old Acacia mangium plot in the Phangnga Forestry Research Station. Three thinning schemes, with 175 (T1), 300 (T2) and 600 (T3) remaining trees/ha, were compared with the control (no thinning) of 831 trees/ha. The diameter at breast height (DBH) and height (H) of the trees were measured. The differences in growth, current annual increment (CAI), aboveground biomass, and stem volume (V) were analyzed. We observed that the thinning of A. mangium increased the growth rate, with the DBH being clearly affected by thinning. CAIDBH increased significantly, with the DBH class of thinned A. mangium plots also improving after thinning. The stem volume and aboveground biomass of T3 plot was similar to the control plot after thinning. In addition, the number of large saw logs was the highest in T3 plot. The large saw logs can be used for multi-utilization and have a high value. These results suggest that thinning can promote stem growth, and increase the proportion of large saw logs in naturally regenerated A. mangium stands.
Co-Authors Chandaeng, Wasan Diloksumpun, Sapit Duangnamon, Decha Inthiraj, Anantachai Maelim, Somporn Ngernsaengsaruay, Chatchai Pianjing, Prisna Poolsiri, Roongreang Sommeechai, Monthathip Somporn, Kanokporn Songsin, Niwat Tansakul, Samita Teejuntuk, Sakhan