KUALITAS AIR SUNGAI CISADANE, JAWA BARAT - BANTEN Ratna Siahaan1), Andry Indrawan2), Dedi Soedharma2), dan Lilik B.Prasetyo2) 1)Mahasiswa S3 Sekolah Pascasarjana IPB, Dosen Universitas Sam Ratulangi; e-mail:ratna245_siahaan@yahoo.com; 2)Dosen Sekolah  Pascasarjana IPB, Bogor ABSTRAK Sungai Cisadane memiliki fungsi dan nilai untuk kesejahteraan manusia dan hidupan liar yang hidup di dalam sungai. Kegiatan manusia yang memanfaatkan air sungai dan membuang sampah/limbah ke Sungai Cisadane dapat menurunkan kualitas air Sungai Cisadane. Penelitian ini bertujuan untuk menganalisis kualitas air S.Cisadane berdasarkan faktor fisika dan kimia air sungai. Penelitian dilakukan di sembilan (9) titik di sepanjang Sungai Cisadane dari hulu hingga hilir pada Agustus-November 2011. Hasil menunjukkan jika air Sungai Cisadane telah tercemar. Secara umum, kualitas air Sungai Cisadane di bagian hulu dan tengah (Stasiun 1-6) masih dapat dipergunakan sebagai air untuk peruntukan Kelas 2 (PP.No.82/2001) dengan kualitas air tercemar ringan. Namun, air Sungai Cisadane di bagian hilir (Stasiun 7-8) hanya untuk peruntukan Kelas 3 dan 4 dan dikategorikan tercemar parah. Kata kunci: kualitas air, sungai Cisadane   WATER QUALITY OF CISADANE RIVER, WEST JAVA-BANTEN ABSTRACT Cisadane River has functions and values for human welfare and wildlife. Human activities in using river water and dumping waste to the river could decrease water quality of Cisadane River. The aim of this research was to analysis water quality of Cisadane River based on physical and chemical factor.  Water sampling was conducted along Cisadane River from up to downstream at nine (9) stations. Result showed that Cisadane River is polluted. Generally, water quality of Cisadane River in up and middle part (Station 1-6) could be used for purposes as in Class 2 (Gov.Reg/PP No.82/2001) and classified into moderately polluted. But, water quality of down Cisadane River (Station 7-9) only for Class 3 and 4 that categorized into heavily polluted. Keywords: Cisadane river, water quality

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The study was aimed to determine flower initiation, floral morphology and to observe the stages of flowering and fruit development of mindi (Melia azedarch L) within a population for one period of time 2008-2009. The methods used were observing directly over the trees and some vegetatives and generatives buds were sampled for dissecting. The observation revealed that the inflorescence type of mindi was panicle, located at the end of a branch. The number of flower varied among inflorescences, ranged between 30-80 that bloomed simultaneously. The flower was hermaphroditic with position of anther was closed to stigma that selfing might be happened. Usually, the ovary contained 5 ovules that developed into seeds. Reproductive cycle was proceeded for 6-7 months within the year, first observation commenced from flower initiation that occur in August, generative buds to flower burst in September-October. Early fruits were formed in October-November and fruits reached physiological-maturity in January-February. Reproductive success was 34%, indicated that the rate of fertilized ovules proportion to be potencially viable seeds were relatively low.

Abstract. Syah C, Indrawan A, Priyono A. 2012. Growth of Rhizophora mucronata in mangrove restoration area at Angke Kapuk Protected Forest,. The aim of this research was to determine the plant growth rate of Rhizophora mucronata in mangrove restoration area of Angke Kapuk Protected Forest, Jakarta and to know the characteristics of the site and its environment. The research indicated that the average plant height was 60.388 cm to 147.496 cm and the average diameter was 2.435 cm to 6.196 cm. The average height increment of the largest found in the sub-station 1 (2.2307 cm) significantly different from the other seven sub-stations. Average high accretion smallest sub-stations located on seven (0.1853 cm) and sub-station (0.1373cm). The average increment of the largest diameter found in the sub-station 1 (0.0591 cm) and 2 (0.0599) significantly different from the other seven substations. Average height increments are the smallest at sub-station 5 (0334 cm) and sub-station 7 (0.0334 cm), and sub-station 8 (0.0334 cm). The highest Caution exchange capacity (CEC) found in sub-station 2 (31.55 me/100 g) and lowest in sub-station 4 (22.94 me/100 g). CEC on the sub-station 4 is low because the dry soil conditions and tidal irregular. Keywords: Mangrove, restorasi, Rhizophora mucronata, pertumbuhan PENDAHULUANHutan mangrove di DKI Jakarta tersebar di kawasan hutan mangrove Tegal Alur-Angke Kapuk di Pantai Utara Daerah Khusus Ibukota (DKI) Jakarta dan di sekitar Kepulauan Seribu. Berdasarkan SK Menteri Pertanian Nomor 16/UM/6/1977 tanggal 10 Juni 1977, peruntukan kawasan Angke Kapuk ditetapkan sebagai hutan lindung, cagar alam, hutan wisata dan lapangan dengan tujuan istimewa. Berdasarkan hasil tata batas di lapangan dan Berita Acara Tata Batas yang ditandatangani pada tanggal 25 Juli 1994 yang diangkat dengan Keputusan Gubernur Kepala Daerah DKI Jakarta diketahui bahwa hutan yang dipertahankan adalah seluas 327,70 ha. Selain di Pantai Utara DKI Jakarta, hutan mangrove juga terdapat di sekitar Kepulauan Seribu (BKSDA Jakarta 2002, 2005.Fungsi mangrove yang terpenting bagi daerah pantai adalah menjadi penyambung darat dan laut. Tumbuhan, hewan, benda-benda lainnya dan nutrisi tumbuhan ditransfer ke arah darat atau ke arah laut melalui mangrove. Ekosistem mangrove berperan sebagai filter untuk mengurangi efek yang merugikan dan perubahan lingkungan utama, dan sebagai sumber makanan bagi biota laut (pantai) dan biota darat. Jika mangrove tidak ada, maka produksi laut dan pantai akan berkurang secara nyata (Chapman 1977;Inoue et al. 1999;Giesen et al. 2006).Habitat mangrove sendiri memiliki keanekaragaman hayati yang rendah, karena hambatan bio-kimiawi yang ada di wilayah yang sempit diantara darat dan laut. Namun hubungan kedua wilayah tersebut mempunyai arti bahwa keanekaragaman hayati yang ada di sekitar mangrove juga harus dipertimbangkan, sehingga total keanekaragaman hayati ekosistem tersebut menjadi lebih tinggi. Pengelolaan mangrove selalu merupakan bagian dari pengelolaan habitat-habitat di sekitarnya agar mangrove tu...