The Relationship between Sediment Grain Size and Bivalve Abundance in Nirwana Beach Waters, Padang City, West Sumatra
DOI:
https://doi.org/10.31258/jocos.7.1.29-35Keywords:
Abundance, Bivalves, Nirwana Beach, SedimentAbstract
Bivalves are benthic organisms that act as bioindicators of ecosystem balance. One of the main factors affecting bivalve abundance is sediment condition. Nirvana Beach is both a tourist area and a harbor for traditional fishing boats. These activities have the potential to change sediment characteristics, which in turn can affect habitat stability, nutrient availability, and various biological processes that support bivalve life. This study aims to determine sediment grain size, bivalve abundance, and the relationship between the two. Sediment and bivalve sampling were conducted using a purposive sampling method at three observation stations. Results showed two main sediment types, gravel and sand gravel, with gravel dominating at all stations. Sediment size was classified as granule and very coarse sand, with mean size values ranging from -2.66 to -1. Bivalve abundance was highest at station II (4.6 ind/m²) and lowest at station I (3.2 ind/m²). Regression analysis showed a very strong relationship between sediment grain size and bivalve abundance. This confirms that sediment characteristics play a role in determining bivalve abundance at Nirvana Beach
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Copyright (c) 2026 Tiara Amanda, Zulkifli Zulkifli, Ilham Ilahi (Author)
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