Seven decades of shoreline changes along a muddy mangrove coastline of the Upper Gulf of Thailand

Abstract Chavanich, S., Viyakarn, V., Loyjiw, T., Pattaratamrong, P., and Chankong, A. 2009. Mass bleaching of soft coral, Sarcophyton spp. in Thailand and the role of temperature and salinity stress. – ICES Journal of Marine Science, 66: 1515–1519. From June to October 2006 and 2007, mass bleaching of the soft coral, Sarcophyton spp., occurred for the first time in the upper Gulf of Thailand. Approximately 90% of the populations experienced extensive bleaching, and almost 95% of colonies were affected. Field observations also revealed that fragmentation of Sarcophyton spp. set in 1 month after the onset of bleaching. Some colonies started to recover to some extent by the end of July, with 95% of the population of Sarcophyton spp. recovering by October. Both acute and chronic trials were conducted to determine whether temperature and/or salinity triggered bleaching. In the acute tests, Sarcophyton spp. at 40°C and salinity 20 psu were completely bleached, and death occurred after 57 and 204 h, respectively. However, the colonies at 40 psu could survive through the experimental trial. In the chronic tests, Sarcophyton spp. died when exposed to 34°C, whereas complete bleaching and mortality of Sarcophyton spp. occurred at salinities of 10 and 49 psu. We conclude that elevated temperatures had a greater effect on the bleaching of Sarcophyton spp. than did salinity.

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Evolution of a nourished sand beach under low wave energy in Thailand

Shore & Beach ◽

10.34237/1008934 ◽

2021 ◽

pp. 36-54

Author(s):

Jirat Laksanalamai ◽

Nobuhisa Kobayashi

Keyword(s):

Water Depth ◽

Wave Energy ◽

Surf Zone ◽

Tidal Range ◽

Gulf Of Thailand ◽

Medium Sand ◽

Sand Beach ◽

Profile Changes ◽

One Year ◽

Upper Gulf Of Thailand

Sand beaches are essential for coastal tourism in Thailand, but erosion narrowed some beaches significantly over the years. Pattaya is a famous resort near Bangkok in the upper Gulf of Thailand. The Pattaya beach is microtidal with the average tidal range of 1.5 m. The average significant wave height is 0.2 m and the wave energy is low. The beach was widened by placing 130 m3/m of medium sand along the shoreline length of 2.8 km between two terminal groins constructed in 2018. The bathymetry and topography were measured in 2015, 2019, and 2020. Approximately 14% of the placed sand in the water depth less than 2 m was lost after one year, as may be expected for nourished beaches. The bathymetry change in the water depth of 2-4 m varied alongshore. The sand volume change in this offshore zone beyond the surf zone was as large as that in the landward sand placement zone. The assumption of negligible profile changes seaward of a closure depth is not applicable to this beach during 2015-2020.

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Dataset of blood cockle (Anadara granosa) microbiota from coastal areas and earthen-pond farms around the upper Gulf of Thailand

Data in Brief ◽

10.1016/j.dib.2020.105393 ◽

2020 ◽

Vol 30 ◽

pp. 105393

Author(s):

Monnat Theerachat ◽

Chompunuch Glinwong ◽

Warawut Chulalaksananukul

Keyword(s):

Coastal Areas ◽

Gulf Of Thailand ◽

Blood Cockle ◽

Anadara Granosa ◽

Upper Gulf Of Thailand

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Spatial and Seasonal Variability of Reef Bacterial Communities in the Upper Gulf of Thailand

Frontiers in Marine Science ◽

10.3389/fmars.2018.00441 ◽

2018 ◽

Vol 5 ◽

Cited By ~ 4

Author(s):

Dewi Embong Bulan ◽

Alisa Wilantho ◽

Patcharaporn Krainara ◽

Voranop Viyakarn ◽

Suchana Chavanich ◽

...

Keyword(s):

Seasonal Variability ◽

Bacterial Communities ◽

Gulf Of Thailand ◽

Upper Gulf Of Thailand

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Historical occurrences of polybrominated diphenyl ethers and polychlorinated biphenyls in Manila Bay, Philippines, and in the upper Gulf of Thailand

The Science of The Total Environment ◽

10.1016/j.scitotenv.2013.09.076 ◽

2014 ◽

Vol 470-471 ◽

pp. 427-437 ◽

Cited By ~ 20

Author(s):

Charita S. Kwan ◽

Hideshige Takada ◽

Ruchaya Boonyatumanond ◽

Yoshihisa Kato ◽

Kaoruko Mizukawa ◽

...

Keyword(s):

Polychlorinated Biphenyls ◽

Polybrominated Diphenyl Ethers ◽

Gulf Of Thailand ◽

Diphenyl Ethers ◽

Manila Bay ◽

Upper Gulf Of Thailand

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Groundwater-derived nutrient inputs to the Upper Gulf of Thailand

Continental Shelf Research ◽

10.1016/j.csr.2006.09.006 ◽

2007 ◽

Vol 27 (2) ◽

pp. 176-190 ◽

Cited By ~ 65

Author(s):

William C. Burnett ◽

Gullaya Wattayakorn ◽

Makoto Taniguchi ◽

Henrieta Dulaiova ◽

Pramot Sojisuporn ◽

...

Keyword(s):

Gulf Of Thailand ◽

Nutrient Inputs ◽

Upper Gulf Of Thailand

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Influences of tropical monsoon climatology on the delivery and dispersal of organic carbon over the Upper Gulf of Thailand, SE Asia

10.5194/egusphere-egu2020-6264 ◽

2020 ◽

Author(s):

Bin Wu ◽

Xiaodan Wu ◽

Xuefa Shi ◽

Shuqing Qiao ◽

Shengfa Liu ◽

...

Keyword(s):

Organic Matter ◽

Organic Carbon ◽

National Laboratory ◽

Coastal Current ◽

Gulf Of Thailand ◽

Se Asia ◽

Organic Carbon Burial ◽

Water Stratification ◽

Tropical Monsoon ◽

Upper Gulf Of Thailand

The seasonal reversal of monsoon climatology modulates precipitation, currents, river influx and a variety of biogeochemical processes. In the present study, we evaluated the role of tropical monsoon pertaining to fluvial discharge, sediment load, coastal current and water stratification on seasonal organic carbon dynamics during four sampling campaigns in the Upper Gulf of Thailand (UGoT), SE Asia. This study demonstrates that particulate organic carbon (POC) is closely correlated with the river influx of suspended sediment, which is generally regulated by the local rainfall. Higher POC is found near the large estuarine section (Chao Phraya River, CHAO) during southwest monsoon period and the small estuarine section (Mae Klong River, MK) during the tropical cyclones impacted November 2013. POC in the estuarine sections is influenced more by the seasonal shift than the coastal sections. Land-derived organic matter prevails in the small estuarine and coastal sections, while marine-derived organic matter dominates in the CHAO and MK impacted estuarine sections. Total organic carbon (TOC) however displays less significant seasonal monsoon variations than POC. Further, TOC tends to accumulate in the sub-silt fraction of sediments, which mainly occurs in the small estuarine and eastern coastal sections and is obviously influenced more by marine-derived factors. TOC in surface sediment of the CHAO and MK influenced sections however displays more seasonal variations with prevailing river input as evidenced by coarser sediment and higher C/N ratios. Moreover, the almost year round water stratification across the region acts as the barrier in retaining organic carbon in the estuaries and their vicinities from dispersal into the lower portion of Gulf of Thailand. High sedimentation rate (~1.1 cm&#183;yr-1) further facilitates the organic carbon burial in the study area. The delivery, dispersal and burial of organic carbon are closely associated with the climate controlled precipitation, and thus the tropical monsoon climatology under the global warming in particular is an important factor influencing the organic carbon in the UGoT.AcknowledgementsThis study was supported by National Programme on Global Change and Air-Sea Interaction (GASI-02-IND-CJ05, GASI-GEOGE-03), the Natural Science Foundation of China (U1606401), the Qingdao National Laboratory for Marine Science and Technology (2016ASKJ13), the China-Thailand cooperation project &#8220;Research on Vulnerability of Coastal Zones&#8221;, and the Taishan Scholar Program of Shandong.

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