Distribution and Density of Polychaetes in Tha Chin Mangrove Estuary, Samut Sakhon Province

Authors

  • Natthakitt To-orn คณะเทคโนโลยีการเกษตรและอุตสาหกรรมเกษตร มหาวิทยาลัยเทคโนโลยีราชมงคลสุวรรณภูมิ

Abstract

The polychaete assemblage composition, distribution and density in Tha Chin mangrove estuary, Samut Sakhon province were studied. Five sampling stations were set along transect from the landward edge of the mangrove forest to the seaward mudflat comprised of Sonneratia forest (TC-S) Rhizophora plantation of 8 years (TC-R) Natural Avicennia forest (TC-A) Natural Avicennia forest on seaward side (TC-AA) and tidal mudflat. A total of six families with 9 genera of polychaetes were found, including Capitellidae (Notomastus, Neomediomastus), Nephtyidae (Nephtys), Nereididae (Dendronereis, Namalycastis, Nereis), Pilargiidae (Sigambra), Spionidae (Minuspio) and Sabellidae. The nereidid polychaete, Namalycastis sp. was the most abundant and widely distributed in the mangrove forest while nereidid polychaete, Nereis sp. was dominated in the tidal mudflat. Polychaete community structure was categorized in to three major groups: (1) those in the tidal mudflat outside the forest in dry season; (2) those in the tidal mudflat outside the forest in rainy season and (3) those in mangrove forest areas. The results showed the distribution and abundances of polychaetes in the mangrove forest were closely related to organic contents and silt-clay fraction in sediment, biomass of leaf litter of mangrove vegetation, temperature and pH of the interstitial water. The nereidid polychaete, Namalycastis sp. can be used as the indicator to monitor and assess mangrove fertility. Keywords :  polychaetes ; Tha Chin mangrove estuary ; Samut Sakhon Province

Author Biography

Natthakitt To-orn, คณะเทคโนโลยีการเกษตรและอุตสาหกรรมเกษตร มหาวิทยาลัยเทคโนโลยีราชมงคลสุวรรณภูมิ

   

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Published

2020-09-01