STRUKTUR KOMUNITAS PLANKTON DI PERAIRAN KALI ANGKE, KOTA JAKARTA BARAT

SALSABILLA, NAJWA MAHARANI and Setiawan, Doni and Patriono, Enggar (2025) STRUKTUR KOMUNITAS PLANKTON DI PERAIRAN KALI ANGKE, KOTA JAKARTA BARAT. Undergraduate thesis, Sriwijaya University.

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Abstract

SUMMARY The Kali Angke waters flows through a densely populated area with various economic activities, making it a location for domestic waste disposal. The study was conducted at four observation stations representing various environmental conditions. Sampling was carried out using a purposive sampling method and identification was carried out at the Ecology and Biodiversity Laboratory of Jakarta State University. The analysis included ecological parameters including abundance, diversity index, evenness, dominance, and community similarity. The results showed that there were 17 identified plankton genera, consisting of 16 phytoplankton and 1 zooplankton. Plankton abundance ranged from 15-20 individuals/L, indicating that the water conditions were not optimal for high productivity. The diversity index was in the moderate category (H' = 2.04– 2.18), with high evenness (E = 0.91–0.94) and low dominance (D = 0.12–0.14), indicating the absence of highly dominant species and a relatively even distribution of individuals between species. The similarity index between stations reached over 50%, indicating that the plankton communities across the various locations tended to be homogeneous. This was also supported by the relatively similar physicochemical parameters between stations, which also influenced the uniformity of the community structure. Overall, despite the pressures of pollution and low productivity, the plankton community still demonstrated stability and adaptability to existing environmental conditions. Keywords: Kali angke , Community Structure, Plankton RINGKASAN Perairan Kali Angke mengalir melalui wilayah dengan kepadatan penduduk tinggi dengan berbagai aktivitas kegiatan ekonomi, menjadikannya sebagai lokasi pembuangan limbah domestik. Penelitian dilakukan di empat stasiun pengamatan yang mewakili variasi kondisi lingkungan. Pengambilan sampel dilakukan dengan metode purposive sampling dan identifikasi dilakukan di Laboratorium Ekologi dan Biodiversitas Universitas Negeri Jakarta. Analisis yang dilakukan mencakup parameter ekologi meliputi kelimpahan, indeks keanekaragaman, kemerataan, dominansi, dan kesamaan komunitas. Hasil penelitian menunjukkan bahwa terdapat 17 genera plankton yang teridentifikasi, terdiri dari 16 fitoplankton dan 1 zooplankton. Kelimpahan plankton berkisar antara 15-20 individu/L, yang menunjukkan bahwa kondisi perairan belum optimal untuk produktivitas tinggi. Indeks keanekaragaman berada dalam kategori sedang (H' = 2,04–2,18), dengan kemerataan yang tinggi (E = 0,90–0,92) dan dominansi yang rendah (D = 0,12– 0,14), yang menunjukkan tidak adanya spesies yang sangat mendominasi dan distribusi individu antar jenis relatif merata. Indeks kesamaan antar stasiun mencapai lebih dari 50%, menunjukkan bahwa komunitas plankton di berbagai lokasi cenderung homogen. Hal ini didukung juga parameter fisika-kimia antar stasiun juga relatif seragam, yang turut mempengaruhi keseragaman struktur komunitas. Secara keseluruhan, meskipun perairan Kali Angke sudah mengalami tekanan pencemaran dan produktivitas masih rendah, komunitas plankton masih menunjukkan stabilitas dan kemampuan beradaptasi terhadap kondisi lingkungan yang ada. Kata Kunci : Kali Angke, Struktur Komunitas, Plankton

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Kali Angke, Struktur Komunitas, Plankton
Subjects:	Q Science > QH Natural history > QH301 Biology
Divisions:	08-Faculty of Mathematics and Natural Science > 46201-Biology (S1)
Depositing User:	Najwa Maharani Salsabilla
Date Deposited:	22 Sep 2025 07:36
Last Modified:	22 Sep 2025 07:36
URI:	http://repository.unsri.ac.id/id/eprint/184552

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