Hubungan N-Total dan C-Organik Sedimen Dengan Makrozoobentos di Perairan Pulau Payung, Banyuasin, Sumatera Selatan

Abstract

The quality of water was seen from the macrozoobenthos community analysis that lives in it. The purpose of this research is to know the relation N-total and C-organic in sediment with macrozoobenthos in Payung Island of Banyuasin Regency. This research uses purposive sampling method. Sampling and macrozoobenthic samples using Ekman grab. The types of macrozoobenthos found to consist of Bivalvia class (Nassarius distortus, Abra Soyae), Gastropoda (Septaria linatea, Epitonium pallasi), Polychaeta (Nereis sp) and Oligochaeta (Lumbriculus sp). The dominant macrozoobenthos composition is Nereis sp. The C-organic content in the waters sediments of Payung Island ranged from 10.52 to 17.92% (moderate to high criteria) and N-total ranged from 0.61 to 1.14% (high and very high criteria), C/N ratio ranged from 10 to 29. This indicates that sediment of Payung Island had undergone balance mineralization process and immobilization. The results of linear regression analysis show that C-organic and N-total have a positive relationship with the abundance of macrozoobenthos Kualitas suatu perairan dapat dilihat dari analisa komunitas makrozoobentos yang hidup di dalamnya. Tujuan penelitian ini adalah mengetahui hubungan antara kandungan N-total dan C-organik sedimen dengan makrozoobentos di Perairan Pulau Payung. Metodologi penelitian meliputi; pengambilan data parameter fisika kimia (suhu, salinitas, pH, dan DO). Pengambilan sampel sedimen dan makrozoobentos menggunakan ekman grab. Hasil dari penelitian ini, Jenis makrozoobentos yang ditemukan terdiri atas kelas Bivalvia (Nassarius distortus, Abra Soyae), Gastropoda (Septaria linatea, Epitonium pallasi), Polychaeta (Nereis sp) dan Oligochaeta (Lumbriculus sp). Komposisi makrozoobentos yang mendominasi yakni Nereis sp. Kandungan C-organik di sedimen perairan Pulau Payung berkisar 10,52-17,92% (kriteria sedang sampai tinggi) untuk N-total berkisar antara 0,61-1,14% (kategori tinggi dan sangat tinggi), sedangkan C/N rasio berkisar antara 10-29. Hal ini menunjukkan sedimen Pulau Payung telah mengalami proses mineralisasi dan imobilisasi seimbang. Hasil analisis regresi linear menunjukkan C-organik dan N-total memiliki hubungan yang positif dengan kelimpahan makrozoobenthos.

Water pollution level of the Upstream Citarum river based on macrozoobenthic family biotic index

“…However, for macrozoobenthos, the pH value is slightly too alkaline because according to Romimohtarto and Juwana [29] the best pH value that can support macrozoobenthic life ranges from 6-7. The station that has the highest C-organic content is station 1 with 5,26% C-organic content, this is because station 1 has a calm water flow, and according to Barus et al [30] calm waters allow siltation to be followed by the accumulation of organic matter to the bottom of the waters so that it has a high organic matter content. Then the lowest C-organic content is at station 3 with a C-organic content of 1,22.…”

“…Then the lowest C-organic content is at station 3 with a C-organic content of 1,22. According to Barus et al [30] low water C-organic can be caused by fine organic particles that do not settle on the substrate. This is because station 3 has a sandy substrate type.…”

“…And the lowest N-total is at station 3 which is 0,18%. According to Barus et al [30] the N-total value of water is influenced by the type of substrate, the smaller the substrate particle size, the greater the organic matter content in the waters. The C/N ratio of the Upstream Citarum River ranges from 7-19.…”

“…The highest C/N ratio is at station 4 and the lowest C/N ratio is at station 3. The C/N ratio value of water is influenced by the total N-total in these waters, because the higher the Ntotal value of water, the lower the C/N ratio [30] . According to Pratiwi et al [31] a low C/N ratio indicates that the mineralization process of organic matter in waters is running well.…”

Keterkaitan Megabentos yang Berasosiasi dengan Padang Lamun terhadap Karakteristik Lingkungan di Perairan Jepara

“…Biota bentik tersebut merupakan salah satu biota yang biasa ditemukan hidup di dasar perairan di ekosistem terumbu karang atau padang lamun. Biota bentik tersebut memiliki peranan yang sangat penting dalam jaring makanan, pemanfaatan bahan organik serta sebagai agen pendegradasi bahan organik di dasar perairan (Barus et al, 2019). Kelompok biota bentik ini sensitif terhadap faktor-faktor perubahan lingkungan, dengan berjalannya waktu, terjadinya perubahan iklim dapat mempengaruhi kondisi padang lamun dan kelimpahan biota bentik yang berasosiasi di dalamnya (Herawati et al, 2017;Arfiati et al, 2019).…”