Riverine and submarine groundwater nutrients fuel high primary production in a tropical bay

Chinfak, Narainrit; Sompongchaiyakul, Penjai; Charoenpong, C.; Wu, Ying; Du, Jinzhou; Jiang, Shan; Zhang, Jing

doi:10.1016/j.scitotenv.2023.162896

Cited by 3 publications

(1 citation statement)

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“…This force sufficiently stirs fine sediment from the bottom throughout the water column, and possibly is important in delivering nutrients from sediment, which stimulate higher productivity of phytoplankton as food for aquatic animals in the bay [ 48 , 49 ]. Both phenomena are reflected by the fact that water in the bay is more turbid and has higher chlorophyll- a concentration when compared with the outer sea [ 50 ]. Stress from pollution is also less likely to occur since the retention time of water in this bay is very short ( Fig 5 ).…”

Section: Discussionmentioning

confidence: 99%

Catch assemblages in the small-scale trap fishery with relation to hydrographic features of a tropical bay in the Gulf of Thailand

Sawusdee,

Pokavanich,

Koolkalya

et al. 2023

PLoS ONE

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Catches from the small-scale trap fishery in Bandon Bay, Suratthani, Thailand, were monitored from 14 sites around the Bay, then disturbance to aquatic communities and catch assemblage were examined. At the same time, the hydrographical features of the bay were surveyed. The study was conducted throughout 2019 except in December, when a tropical cyclone made sampling impossible. In total, 17,373 animals from 118 species or species groups of aquatic animals were collected. The main target of the fishery, blue swimming crab Portunus pelagicus, contributed about 10% of the total catch in terms of number; meanwhile, another crab, Charybdis affinis, was the most dominant species (41% of total). W-statistics of Abundance-Biomass Comparison curves ranged between -0.025 and 0.031, indicating light disturbance to the communities in this fishing ground. The catch assemblage, based on number in catch composition, were divided into three main clusters and six sub-clusters by using the self-organizing map (SOM) technique. The SOM results showed that the catch assemblages differed based largely on temporal variation. The hydrographic features of Bandon Bay at times exhibited a layered structure and had strong spatial variation. The bay’s current system was governed by motion of tidal currents; meanwhile, the circulation was governed by monsoonal wind and freshwater discharges. Tidal current was strong and ranged between approximately 0.6 m to 2.2 m. Water within the bay was always warmer than the outer sea. High water temperature was observed two times during the year: during monsoon transition 1 (April to May) and transition 2 (October). Salinity showed great spatial and temporal variation, differing by more than 5–10 ppt horizontally. It was possible to use these dynamic hydrological features of Bandon Bay to explain assemblage patterns of the trap-net catches.

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Section: Discussionmentioning

confidence: 99%