Environmental Management

, Volume 35, Issue 1, pp 45–55 | Cite as

Effects of Changing Environments of Mangrove Creeks on Fish Communities at Trat Bay, Thailand

  • Nuanchan SingkranEmail author
  • Suraphol Sudara


Effects of changing environments of riverside mangroves, coastal land uses, and water quality on fish communities were studied in Bangphra and Thaprik creeks, Trat Bay, Thailand. Regression analysis revealed that fish species richness in the wet season had a negative relationship with water transparency, nitrate, and phosphate and a positive relationship with zooplankton. In the dry season, species richness had a negative relationship with nitrate and phosphate and a positive relationship with salinity, pH, and zooplankton. Abundances and species richness of fish declined over distance from downstream to upstream in both creeks. Riparian mangroves and water quality also declined with distance upstream in both creeks. Results from one-way analysis of variance and Tukey’s HSD test revealed that the highest zooplankton volume with the lowest amounts of nitrate and phosphate were observed at the downstream station in both creeks in each season. Low zooplankton volume with high amounts of nitrate and phosphate were found at the midstream and upstream stations of the creeks. The midstream and upstream stations of Bangphra Creek had low to moderate abundance of mangroves along the riversides, whereas shrimp farms were mainly found along the riversides at the midstream and upstream stations of Thaprik Creek. Correlation analysis results of land-use types and the significant habitat factors were discussed. This study found that mangrove degradation, shrimp farming, and residential and agricultural areas altered water quality and the health of fish habitats, causing the decreases in fish abundance and species richness.


Fish communities Land uses Mangroves Shrimp farming Water quality Thailand 



We thank Dr. Prachit Wongrat, Dr. Sirichi Dharmavanij, Dr. Kumtorn Thirakhupt, Dr. Chavalit Vidthayanon, and Dr. Surachal Ratanasermpong for their help on our study. We thank Dr. Mark Bain, the reviewers of this paper, and Ms. Marci Meixler for their comments and suggestions to complete the manuscript. We also thank Dr. Sanya Sirivithayapakorn, Mr. Tawat Sriveerachai, and Ms. Suwanna Worasingh for their additional information support.

This study was supported by the TRF/BIOTEC Special Program for Biodiversity Research and Training Grant (BRT) of Thailand, the Chin Sophonpanich Foundation for Environment, and Chulalongkorn University, Thailand.

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  1. 1.Department of Natural ResourcesCornell UniversityIthacaUSA
  2. 2.Department of Marine ScienceChulalongkorn UniversityThailand

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