Judul: Pengaruh Perubahan Tutupan Lahan terhadap Perubahan Iklim Wilayah (Studi Kasus: Kota Jambi dan Kabupaten Kerinci)
Abstrak: Regional climate change can be known from maximun and minimum temperature over the last few years. Jambi city is a growing area with more rapid development than Kerinci regency, and therefore contributes to changes in LULC. LULC analysis by using Landsat TM and ETM images in 1996 and 2006. Changes of LULC to building increase about 11% over the last 10 years. On the other hand, in Kerinci regency primary forest decreases by 4%, farm decreases by and 1%, and mix plantation decreases by 5%. Based on Mann Kendall Test maximum temperature increase significantly within 30 years with rate 0.048oC/year in Jambi city and 0.037oC/year in Kerinci regency, but there was no trend in minimum temperature in Jambi city. There is a decrease in minimum temperature in kerinci regency. Model projections show an increase in maximum and minimum temperature trends for the short-term and long-term future in Jambi city and Kerinci regency. However the model were not good enough to describe condition of study area, with R2 values below 50% and small RMSE.
Keyword: climate change, Mann Kendall Test, LULC, Jambi

Judul: Analysis of Land Cover Change and Its Impact on Near Surface Temperature in Jambi City Using The WRF Model
Abstrak: Studi ini bertujuan mengidentifikasi dan menganalisis variasi suhu udara permukaan akibat perubahan tutupan lahan di Kota Jambi menggunakan model WRF. Klasifikasi tutupan lahan di Kota Jambi menggunakan data MODIS MCD12Q1. Klasifikasi tersebut terdiri atas sepuluh kategori tutupan lahan berdasarkan skema IGBP, dengan evergreen broadleaf forest dan woody savannas menjadi tipe tutupan lahan dominan. Wilayah Jambi memiliki pola curah hujan ekuatorial, ditandai dengan adanya dua puncak musim hujan. Curah hujan bulanan tertinggi sebesar 256 mm tercatat pada bulan Desember, sedangkan yang terendah adalah 102 mm pada bulan Juni. Musim kemarau berlangsung dari bulan Juni hingga September, dengan curah hujan bulanan di bawah 150 mm. Validasi hasil suhu udara model WRF menggunakan data pengamatan suhu harian rata-rata dari Stasiun Meteorologi Sultan Thaha. Perbandingan antara suhu udara rata-rata harian dari hasil model dan pengamatan di Stasiun Meteorologi Sultan Thaha menunjukkan perbedaan yang relatif tidak signifikan, dengan variasi berkisar antara 0,06 hingga 2,55 °C. Secara umum, nilai p hasil pengujian lebih rendah dari tingkat signifikansi (α = 0,05) menunjukkan bukti kuat adanya perbedaan signifikan secara statistik dalam suhu udara rata-rata harian antara tahun 2003 dan 2021 baik untuk bulan Juni maupun Desember., The study aims to identify and analyze the impact of near-surface air temperature variation due to land cover changes in Jambi City using the WRF model. Land cover classification of Jambi City using MODIS MCD12Q1 data. The classification consists of ten land cover categories based on the IGBP scheme, with evergreen broadleaf forest and woody savannas being the dominant land cover types. The Jambi region has an equatorial rainfall pattern, characterized by two peaks in the rainy season. The highest monthly rainfall of 256 mm is recorded in December, while the lowest is 102 mm in June. The dry season lasts from June to September, with monthly rainfall below 150 mm. Validation of WRF model air temperature results using average daily temperature observation data from Sultan Thaha Meteorological Station. Comparison between daily average air temperature from model results and observations at Sultan Thaha Meteorological Station showed relatively insignificant differences, with variations ranging from 0.06 to 2.55 °C. In general, the p values of the test results are lower than the significance level (α = 0.05) indicating strong evidence of statistically significant differences in daily average air temperature between 2003 and 2021 for both June and December.
Keyword: UHI, WRF model, numerical weather prediction

Judul: Kolonisasi dan proliferasi sel testikular ikan nila putih yang ditransplantasikan ke ikan nila hitam triploid
Abstrak: The technology of fish testicular cells transplantation had been established to create a surrogate broodstock. This technology can also be utilized to generate YY-progenies that are useful to produce all-male fish. In this study, as a first step towards all-male tilapia production, white Nile tilapia testicular cells was transplanted into peritoneal cavity of triploid black tilapia larvae. A specific primer was designed to identify colonization and proliferation of transplanted cells in recipient fish using PCR method. Analysis of gonadosomatic index (GSI) was also performed to determine the transplanted cells proliferation in recipient gonad. The result of PCR analysis showed a specific DNA amplification product in the gonad of transplanted fish. The specific DNA donor was detected on the recipient gonad 90 dpt (days post transplantation) and it was not detected on 30 and 60 dpt. The GSI analysis showed that GSI recipient was increased and relatively similar with diploid non-transplanted Nile tilapia and it was higher than triploid non-transplanted Nile tilapia. These results showed that the donor cell could be colonized and proliferated in triploid black tilapia gonad. Thus, it is likely to obtain a broodstock that is able to produce donor-derived gamete in the near future.
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