Eco-environmental impact assessment of pre-leisure beach nourishment on the benthic invertebrate community at Anping coast |
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| Authors: | Chun-Han Shih Yi-Yu Kuo Ta-Jen Chu Wen-Chieh Chou Wei-Tse Chang Ying-Chou Lee |
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| Institution: | Department of Civil Engineering,National Chiao Tung University,Hsinchu 30010,China c Department of Leisure and Recreation Management,Chung Hua University,Hsinchu 30012,China d Department of Civil Engineering,Chung Hua University,Hsinchu 30012,China |
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| Abstract: | In recent years, owing to global warming and the rising sea levels, beach nourishment and groin building have been increasingly
employed to protect coastal land from shoreline erosion. These actions may degrade beach habitats and reduce biomass and invertebrate
density at sites where they were employed. We conducted an eco-environmental evaluation at the Anping artificial beach-nourishment
project area. At this site, sand piles within a semi-enclosed spur groin have been enforced by use of eco-engineering concepts
since 2003. Four sampling sites were monitored during the study period from July 2002 to September 2008. The environmental
impact assessment and biological investigations that we conducted are presented here. The results from this study indicate
that both biotic (number of species, number of individual organisms, and Shannon-Wiener diversity) and abiotic parameters
(suspended solids, biological oxygen demand, chemical oxygen demand, dissolved inorganic nitrogen, dissolved inorganic phosphorus,
total phosphorus, total organic carbon, median diameter, and water content) showed significant differences before and after
beach engineering construction. Biological conditions became worse in the beginning stages of the engineering but improved
after the restoration work completion. This study reveals that the composition of benthic invertebrates changed over the study
period, and two groups of organisms, Bivalvia and Gastropoda, seemed to be particularly suitable to this habitat after the
semi-enclosed artificial structures completion. |
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| Keywords: | beach nourishment benthic invertebrate eco-engineering ecological restoration spur groin |
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