Keanekaragaman Jenis Tumbuhan dan Estimasi Simpanan Karbon di Atas Permukaan Tanah PT. Cita Mineral Investindo, Kalimantan Barat.

Abstract

Kalimantan Barat merupakan salah satu penyumbang sumber mineral bauxite terbesar di Indonesia, oleh karena itu dengan terdapatnya banyak penambangan bauxite yang besar di Kalimantan Barat perlu dilakukan studi dalam pendugaan keragaman jenis tumbuhan dan estimasi simpanan karbon yang terdapat pada salah satu perusahaan tambang bauxite yang berada di Kalimantan Barat. Tujuan dari penelitian ini mengetahui dan menghitung simpanan karbon di hutan alam (Blok 1) dan lahan revegetasi (Blok 8). Indeks keanekaragaman dan kemerataan di lahan revegetasi 2019 (Blok 8) termasuk rendah, dan indeks kemerataan lahan revegetasi 2019 (Blok 8) tergolong tinggi pada tingkatan tumbuhan bawah, pancang, tiang dan pohon, sedangkan pada tingkatan semai menunjukan indeks kemerataan yang tergolong sedang. Simpanan karbon yang terdapat pada hutan alam (Blok 1) sebesar 17.970 ton C/ha dan lahan revegetasi 2019 (Blok 8) sebesar 4.264 ton C/ha. Potensi serapan karbon hutan alam (Blok 1) sebesar 65.951 ton CO2/ha dan di lahan revegetasi 2019 (Blok 8) sebesar 15.648 ton CO2/ha.

West Kalimantan is one of the largest contributors of bauxite mineral resources in Indonesia. Therefore, due to the presence of numerous large-scale bauxite mining operations in West Kalimantan, a study is needed to assess the diversity of plant species and estimate the carbon stock within one of the bauxite mining companies located in the region. The purpose of this study is to identify and calculate the carbon stock in natural forest (Block 1) and in the revegetation area (Block 8). The diversity and evenness indices in the 2019 revegetation area (Block 8) are considered low, while the evenness index in the 2019 revegetation area (Block 8) is categorized as high at the levels of understorey vegetation, saplings, poles, and trees, whereas the evenness index at the seedling level is considered moderate. The carbon stock in the natural forest (Block 1) is 17.970 tons C/ha, and in the 2019 revegetation area (Block 8) is 4.264 tons C/ha. The carbon sequestration potential in the natural forest (Block 1) is 65.951 tons CO2/ha, and in the 2019 revegetation area (Block 8) is 15.648 tons CO2/ha.