Judul: Kelimpahan dan Komposisi Jenis Fitoplankton pada Kolam  yang Diberi Jerami dan Pupuk Kandang
Abstrak: Phytoplanton is water organism which has important role, example as primary producer in the waters. The growth and development of phytoplankton can be influenced by nutrient. The nutrient which is needed by the phytoplankton can be given with natural fertilizer and artificial fertilizer. Natural fertilizer usually used are straw and manure. The research has an aim to find out the abundance and genre composition of phytoplankton in the pond which is given straw and various manure. The sampling was done after 2 weeks from the present of straw and manure. The data analysis are including abundance and genre composition of phytoplankton, diversity, index (H'), dominance index (C) and evenness index (E). Water quality analysis which obsewated are temperature, p y DO and nutrient (ammonia, nitrate, nitrite and orthophosphate). Multiple limier regression analysis is used to find out the relation between nutrient and phytoplankton abundance. The observation result shows that there are three divisions, which are Cyanophyta (13 genus), Chrysophyta (6 genus) and Chlorophyta (G genus). The phytoplankton division that has highest composition is Cyanophyta. The highest abundance of phytoplankton can be founded in the pond which is given straw and cow manure. The growth and development of phytoplankton are influenced by experimental pond condition. The result from water quality analysis shows that the condition of experimental pond can support the growth and development of phytoplankton. The difference of phytoplankton abundance can be influenced by the different manure which is given to every experimental pond.
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Judul: Plankton Community Structure in Intensive Pond
Abstrak: Tambak merupakan suatu ekosistem perairan tertutup yang memiliki kondisi lingkungan berubah-ubah. Manajemen kualitas air menjadi hal yang penting untuk dilakukan karena berdampak pada komunitas plankton. Penelitian ini bertujuan untuk menganalisis kondisi struktur komunitas plankton di tambak udang yang dikelola secara intensif. Penelitian dilakukan di Tambak Sarjo, Sulawesi Barat dan di Laboratorium Biologi Mikro 1, Institut Pertanian Bogor. Data yang digunakan yaitu data primer (sampel plankton) dan sekunder (data kualitas air). Pengambilan sampel plankton dilakukan pada dua petak tambak berdasarkan kesamaan umur awal tebar dari benih udang selama tiga bulan. Data kualitas air diperoleh dari laboran tambak Sarjo. Analisis data yang digunakan adalah indeks diversitas meliputi indeks keanekaragaman, keseragaman, dan dominansi serta analisis komponen utama dan regresi linier berganda. Komunitas plankton yang ditemukan terdiri dari lima jenis fitoplankton dan empat jenis zooplankton dengan total 14 genus fitoplankton dan 9 genus zooplankton. Kelimpahan plankton yang ditemukan berfluktuasi. Kelas Dinophyceae dan Protozoa hampir ditemukan pada setiap kelompok waktu pengamatan. Struktur komunitas plankton selama pengamatan memiliki keanekaragaman rendah, keseragaman rendah hingga sedang, dan dominansi yang cenderung rendah hingga sedang untuk fitoplankton dan rendah dengan kecenderungan tinggi untuk zooplankton. Perubahan kelimpahan plankton berkorelasi kuat dengan parameter kualitas air yang ada., Ponds are closed aquatic ecosystems that have changing environmental conditions. Water quality management is an important thing to do because it impacts the plankton community. This research aims to analyze the condition of plankton community structure in intensively managed shrimp ponds. The research was conducted in Tambak Sarjo, West Sulawesi, and at Micro Biology Laboratory 1, Bogor Agricultural Institute. The data used are primary (plankton samples) and secondary (water quality data). Plankton sampling was carried out in two pond plots based on the similarity in the initial stocking age of the shrimp seeds for three months. Water quality data was obtained from the Sarjo Pond laboratory. The data analysis used is a diversity index including indices of diversity, evennes, and dominance, principal component analysis, and multiple linear regression. The plankton community consisted of five types of phytoplankton and four types of zooplankton with 14 phytoplankton genera and 9 zooplankton genera. The abundance of plankton found fluctuates. The Dinophyceae and Protozoa classes were almost found in every observation time group. The plankton community structure during observations had low diversity, low to moderate uniformity, and dominance that tended to be low to moderate for phytoplankton and low with a tendency to be high for zooplankton. Changes in plankton abundance are strongly correlated with existing water quality parameters.
Keyword: phytoplankton, ponds, water quality, zooplankton

Judul: Integration of Islamic Stock Markets of OIC Countries Before and During the Russia-Ukraine War Crisis
Abstrak: Pasar saham yang terintegrasi memberikan dampak negatif seperti percepatan co-movement (pergerakan bersama) yang rentan terhadap guncangan ekonomi, maupun krisis pasar global ke pasar domestik. Salah satu krisis yang terjadi pada tahun 2022 adalah perang Rusia-Ukraina yang berdampak pada pasar saham, termasuk pada saham syariah yang dipercaya lebih tahan terhadap guncangan krisis global. Penelitian ini bertujuan untuk meneliti perkembangan, integrasi dan respon lima pasar saham syariah negara OKI pada perang Rusia-Ukraina. Metode yang digunakan adalah VAR/VECM pada indeks DJIMMT25, SPSADS, SPSUAEDS, JII, DJIMT, SPBMIR, dan SPBMIU. Hasil penelitian menunjukkan pergerakan yang sama pada pasar saham UAE dan Arab Saudi, sedangkan Turki mengalami tren positif selama perang. Pasar saham syariah negara OKI selama periode perang Rusia-Ukraina terkointegrasi, sementara pasar saham Malaysia memengaruhi pasar saham syariah empat negara OKI lainnya. Hasil IRF menunjukkan terdapat efek permanen pada volatilitas pasar saham syariah negara OKI akibat guncangan yang diberikan. Namun, respon volatilitas relatif kecil karena kontribusi guncangan lebih didominasi oleh pasar saham itu sendiri, An integrated stock market has negative impacts, such as accelerating co-movement, which is vulnerable to economic shocks and global market crises on the domestic market. One of the crises in 2022 was the Russia-Ukraine war which impacted the stock market, including Sharia stocks which were believed to be more resistant to the shocks of the global crisis. This study examines the development, integration, and response of OIC countries five Islamic stock markets in the Russia-Ukraine war. The method used is VAR/VECM on the DJIMMT25, SPSADS, SPSUUAEDS, JII, DJIMT, SPBMIR, and SPBMIU indices. The results show the same movement in the UAE and Saudi Arabia stock markets, while Turkey experienced a positive trend during the war. The Islamic stock market of the OIC countries during the Russia-Ukraine war was cointegrated. In contrast, the Malaysian stock market influenced the Islamic stock markets of the other four OIC countries. The IRF results show a permanent effect on the volatility of the Islamic stock market in OKI countries due to the shocks given. However, the volatility response is relatively small because the stock market itself dominates the contribution of shocks.
Keyword: co-movement, OIC, Rusia-Ukraine war, sharia stock market integration