Abstrak

Gastropoda mempunyai peran penting dalam ekosistem mangrove salah satunya adalah sebagai dekomposer yaitu dengan mengubah bahan organik yang akan berperan besar dalam siklus makanan dan energi. Gastropoda merupakan kelompok biota yang dapat bertahan hidup dari subsrat kasar ke halus dan kelimpahannya dipengaruhi oleh jenis substrat sedimen. Substrat sedimen pada kawasan ekosistem mangrove merupakan salah satu habitat tempat hidup bagi gastropoda, jenis tekstur sedimen yang terdapat pada habitatnya memiliki kelebihan dan kekurangannya sendiri dan dapat mempengaruhi keberlangsungan gastropoda seperti substrat kerikil, pasir, lanau, dan lempung. Lokasi penelitian berada di kawasan ekosistem mangrove Desa Takisung Kabupaten Tanah Laut. Penelitian ini bertujuan untuk mengetahui korelasi kelimpahan gastropoda terhadap substrat sedimen berdasarkan kelimpahan individu (ind/m²) gastropoda dan jenis substrat sedimen. Nilai kelimpahan individu diperoleh 2,04 ind/m², 2,94 ind/m², 1,41 ind/m² dan 1,61 ind/m² didapat menggunakan rumus kelimpahan individu. Substrat sedimen pada kawasan mangrove terdapat jenis substrat kerikil, pasir, dan lumpur. Berdasarkan hasil penelitian, hubungan kelimpahan gastropoda terhadap substrat kerikil dan pasir memiliki hubungan negatif, sedangkan terhadap substrat lumpur memiliki nilai positif.

Abstract

Gastropods have an important role in the mangrove ecosystem, one of which is as decomposers, namely by changing organic material which will play a big role in the food and energy cycle. Gastropods are a group of biota that can survive from coarse to fine substrates and their abundance is influenced by the type of sediment substrate. The sedimentary substrate in the mangrove ecosystem area is one of the living habitats for gastropods. The type of sediment texture found in the habitat has its own advantages and disadvantages and can influence the survival of gastropods such as gravel, sand, silt and clay substrates. The research location is in the mangrove ecosystem area of ??Takisung Village, Tanah Laut Regency. This study aims to determine the correlation between gastropod abundance and sediment substrate based on individual abundance (ind/m2) of gastropods and the type of sediment substrate. The individual abundance values ??obtained were 2.04 ind/m2, 2.94 ind/m2, 1.41 ind/m2 and 1.61 ind/m2 obtained using the individual abundance formula. Sediment substrates in mangrove areas include gravel, sand and mud. Based on the research results, the relationship between gastropod abundance on gravel and sand substrates has a negative relationship, while on mud substrates it has a positive value.