Electronic Theses and Dissertation

Peningkatan kesuburan diakibatkan adanya masukan nutrien ke perairan, terutama nitrogen dan fosfat yang mendukung pertumbuhan organisme perairan tersebut. status trofik atau tingkat kesuburan perairan merupakan gambaran perkembangan dan fungsi organisme untuk mengklasifikasikan proses produktivitas perairan danau. tujuan penelitian ini untuk menganalisa tingkat kesuburan berdasarkan beberapa pendekatan indeks. penelitian ini dilakukan pada bulan maret-april 2024 yang berlokasi di perairan danau aneuk laot, kota sabang. metode penelitian ini adalah deskriptif dengan menggunakan beberapa indeks yaitu indeks trix, tsi dan tli. status kesuburan perairan danau aneuk laot berdasarkan nilai indeks trix dan tli yaitu mesotrofik dengan nilai indeks 4,40 dan 3,79, sedangkan nilai indeks tsi tergolong status kesuburan eutrofik dengan nilai 57,69. berdasarkan kualitas perairan, danau aneuk laot masih tergolong layak bagi kelangsungan hidup organisme perairan. kata kunci : danau aneuk laot, kualitas air, tingkat kesuburan, trix, tsi, tli.

Increased fertility is due to the input of nutrients into waters, especially nitrogen and phosphate, which support the growth of aquatic organisms. Trophic status or water fertility level is a description of the development and function of organisms to classify the productivity process of lake waters. The aim of this research is to analyze fertility levels based on several index approaches. This research was conducted in March-April 2024, located in the waters of Lake Aneuk Laot, Sabang City. This research method is descriptive using several indices, namely the TRIX, TSI and TLI indexes. The fertility status of Lake Aneuk Laot waters is based on the TRIX and TLI index values, namely mesotrophic with index values of 4.40 and 3.79, while the TSI index value is classified as eutrophic fertility status with a value of 57.69. Based on water quality, Aneuk Laot Lake is still considered suitable for the survival of aquatic organisms. Keywords: Aneuk Laot Lake, Water Quality, Fertility Level, TRIX, TSI, TLI.