Judul: Estimation of Gain and Loss of Bird Diversity Due to Land Fires (Case Study: PT Rambang Agro Jaya)
Abstrak: Kebakaran lahan pada area perkebunan sawit terus menimbulkan anggapan dampak negatif terutama terhadap keanekaragaman hayati. Penelitian mengenai keanekaragaman hayati, termasuk burung, di lahan bekas terbakar pada lahan perkebunan belum banyak dilakukan. Penelitian ini ditujukan untuk mengetahui dampak dari kebakaran lahan pada keanekaragaman jenis burung. Penelitian dilaksanakan pada bulan Agustus 2020 di perkebunan sawit PT Rambang Agro Jaya, Sumatera Selatan, menggunakan metode titik hitung dan metode transek jalur pada 3 tutupan lahan berbeda (sawit tidak terbakar dan bekas terbakar, semak belukar tidak terbakar dan bekas terbakar, dan area nilai konservasi tinggi) sebanyak tiga kali pengulangan secara paralel. Hasil menunjukan bahwa terbakarnya lahan semak belukar menyebabkan hilangnya 19 jenis burung (65,52%) dan perolehan jenis sebanyak 2 jenis burung (6,90%). Sementara terbakarnya lahan pada areal sawit menyebabkan hilangnya 3 jenis burung 9,68% dengan perolehan jenis sebanyak 11 jenis burung (35,48%)., Land fires in oil palm plantation areas continue to raise public perceptions of negative impacts, especially on biodiversity. Research on biodiversity, including birds, on burnt land on plantations has not been widely carried out. This research aimed to determine the impact of land fires on bird species diversity. This research was conducted in August 2020 at the oil palm plantation of PT Rambang Agro Jaya, South Sumatra, using the point count method and the line transect method on three different land covers (unburned and burnt palm oil, unburned and burnt shrubs, and high conservation value area) for three repetitions in parallel. The results showed that the burning of bushland caused the loss of 19 bird species (65.52%) and the gain of 2 bird species (6.90%). Meanwhile, the burning of land in the oil palm area caused the loss of 3 bird species (9.68%) with the acquisition of 11 bird species (35.48%).
Keyword: burung, kelapa sawit, keanekaragaman, perolehan dan kehilangan, bird, loss and gain, palm oil, variation

Judul: Perbandingan Keanekaragaman Jenis Burung Antara Lahan Pasca Terbakar dan Tidak Terbakar di Perkebunan Sawit PT. Waimusi Agroindah, Sumatera Selatan
Abstrak: Banyak anggapan bahwa kebakaran hutan dan lahan dapat mengakibatkan dampak yang merugikan bagi keanekaragaman hayati terutama dampak negatif terhadap tumbuhan dan satwaliar. Oleh sebab itu perlu dilakukan penelitian mengenai perbandingan keanekaragaman jenis burung dan tumbuhan bawah yang ada di lahan pasca terbakar, lahan tidak terbakar dan perkebunan kelapa sawit. Penelitian dilakukan pada Februari hingga Maret 2017. Pengambilan data keanekaragaman burung menggunakan metode transek dan analisis vegetasi menggunakan metode jalur berpetak dengan luas 20m x 20m dan pengambilan plot contoh ukuran 2m x 2m sebanyak 5 plot. Analisis data yang digunakan adalah Indeks Kemerataan (E), Indeks Kekayaan (Dmg) dan Indeks Kesamaan komunitas (IS). Hasil pengamatan menunjukkan bahwa pada lokasi lahan pasca terbakar terdapat 36 jenis burung dan 16 jenis tumbuhan bawah, pada lokasi lahan tidak terbakar terdapat 25 jenis burung dan 13 jenis tumbuhan bawah serta pada lokasi lahan kelapa sawit terdapat 24 jenis burung dan 17 jenis tumbuhan bawah. Kekayaan jenis burung tertinggi terdapat di lahan pasca terbakar yaitu dengan nilai Dmg=5.44, sedangkan kemerataan tertinggi terdapat di lahan tidak terbakar sebesar E=0.85.
Keyword: burung, kebakaran, keanekaragaman, kemerataan, kelapa sawit

Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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