IJSTR >> Volume 5 - Issue 10, November 2016 Edition

[Full Text]

AUTHOR(S)

Lariman, Wawan Kustiawan, A.Safei Sidik, Sigit Hardwinarto

KEYWORDS

climate change, ecosystem, Batu Bumbun Sanctuary, management.

ABSTRACT

Batu Bumbun Sanctuary (Middle Mahakam Lake) is very important for the fishermen community and Mahakam Irrawaddy Dolphin life concerned to its function as the source of fish and as the feeding ground of Irrawaddy Dolphin (Orcaella brevirostris). The changes in the forest function and the climate (such as rainfall and water surfaces) are predicted to have caused suppression in the ecosystem of Batu Bumbun Sanctuary. The aim of this study is to evaluate the current ecosystem changes of Batu Bumbun Sanctuary and suggest a suitable management strategy as a way to conserve its function. The research was conducted during the dry season (April – June) and rainy season (November – December) 2014, by using survey methods. The measured parameters were including water quality (DO, pH, temperature, TSS, TDS, alkalinity, and clarity), vegetation composition, rainfall, water surface elevation, and sediment. The data of fish community were analysed by using Shanon-Wiener index. The result showed that: (1) The current condition of Batu Bumbun biophysical ecosystem has been experiencing a heavy degradation, showed by a high fluctuation of the water surface in two extreme seasons such as the flood in rainy seasons and silt up in the dry season. (2) The vegetation composition in the riverbanks was composed of five species including Bungur (Lagerstroemia speciosa), Rambai Punai (Chaetocarpus Castano carpus), Kendikara (Dillenia excelsa), Kademba (Mytragina speciosa), and Rengas (Gluta renghas). The dominant tree species was Putat (Barringtonia asiatica) and Perupuk (Lophopetalum javanicum). (3) Batu Bumbun Sanctuary has been experiencing a heavy siltation caused by silt material that piles up the weeds during the rainy season. Since 1985, Batu Bumbun was predicted to have rates of silting around 8 cm/year. From those result, it can be concluded that Batu Bumbun has been experiencing a heavy degradation showed by a high fluctuation of water surface, vegetation composition, and heavy siltation. Then, the most suitable suggestion for its management was (a) dredging, (b) revegetation, (c) restocking native fish, (d) establishing an appropriate institute, (e) preventing illegal fishing, and (f) increasing its security.

REFERENCES

[1] Anonim. 2001, Peraturan Pemerintah Republik Indonesia Nomor 82 Tahun 2001 Tentang pengelolaan kualitas air dan pengendalian pencemaran air.

[2] Badjoeri, M. & Lukman. 1998, Pemanfaatan tumbuhan air kumpai dari Danau Semayang sebagai pakan sapi. Dalam: Anonimus (Eds). Pendayagunaan dan Rehabilitasi Lingkungan Perairan Danau Semayang Kalimantan Timur, Puslitbang Ekonomi dan Pembangunan LIPI, Jakarta. Hal.125-133.

[3] Doi, A. R. Komatsu & D. I. Hartoto, 2000, Fish occurring in a black water oxbow lake in South Borneo. Report of the Suwa Hydrobiological Station Shinshu University No.12 (ISSN 916-3255): 25-28.

[4] Effendie, M.I.,1979, Metoda biologi perikanan. Yayasan Dewi Sri. Cetakan I, Bogor. 112 hlm.

[5] Hartoto, D.I.,1989, Profil Oksigen dan Suhu. Dalam:A. Nontji dan D.I. Hartoto (Eds). Limnologi Situ Bojongsari, Pusat Penelitian dan Pengembangan Limnologi, Lembaga Ilmu Pengathuan Indonesia: 30-50

[6] Hartoto D.I. & E. Mulyana, 1996, Hubungan antara parameter kualitas air dan struktur ikhtiofauna perairan darat Pulau Siberut. [The relationship of water quality parameter and inland water Ichthyofauna Structure of Siberut Island.] Oseanologi dan Limnologi di Indonesia (OLDI), No. 29: 41-55.

[7] Hartoto, D.I.,1997, Notes on limnologi condition of Lake Loakang as feshery reserve and its potential as food supplay habitat for Mahakam Freshwater Dolphin. In Rehabilitasi Lingkungan Perairan Danau Semayang, Kalimantan Timur. Puslitbang Ekonomi dan Pembangunan LIPI, Jakarta. p.63-65.

[8] Hartoto, D.I.,2000, An overview of some limnological parameters and management status of fishery reserves in Central Kalimantan. Report of the Suwa Hydrobiological Station Shinshu University No.12 (ISSN 916-3255): 49-74.

[9] Hartoto, D.I.,2004, Perlindungan, mitigasi dan restorasi habitat untuk pengelolaan perikanan tangkap di perairan umum. Makalah disajikan pada Lokakarya Pengelolaan Perikanan Perairan Umum Wilayah Kalimantan dan Sumatera, 7-9 Juli 2004, Palangkaraya, Kalimantan Tengah. 40 hal.

[10] Hartoto, D.I. & Yustiawati, 2006, The level of humic acid levels at various type of inland water in Central Kalimantan. Oseanologi dan Limnologi di Indonesia, No. 39:1-20

[11] Krebs, C.J.,1985, Ecology, The experimental analysis of distribution and abundance. 3 rd edition. Harper and Row Publisher, New York. 694 p.

[12] Kreb, D.,2004, Facultative river dolphins. Conservation and social ecology of freshwater and coastal Irrawaddy dolphins in Indonesia. Copyright© D. Kreb 2004 (ISBN: 90-76894-515): 230 pp.

[13] Lukman, 1998, Kualitas air Danau Semayang pada periode pra penyurutan dan pra penggenangan. LIMNOTEK, Perairan Darat Tropis Di Indonesia, V(1):77-84.

[14] Lukman & Gunawan, 1998, Lake Semayang and Melintang, East Kalimantan as the habitat of Freshwater Dolphin. Dalam: Anonimus (Eds). Pendayagunaan dan Rehabilitasi Lingkungan Perairan Danau Semayang Kalimantan Timur, Puslitbang Ekonomi dan Pembangunan LIPI, Jakarta. Hal. 51-68

[15] Nasution, S.H., D.I. Hartoto, Dharmadi, & D. Oktaviani,2008, Kelimpahan ikan Putihan dan hubungannya dengan pemunculan Pesut Mahakam. Jurnal Oseanologi dan Limnologi Di Indonesia, 34(2):133-149.

[16] Nasution, S.H., D.I. Hartoto, Dharmadi & D. Oktaviani, (In publication). Struktur komunitas dan kelimpahan fitoplankton di lingkungan habitat Pesut Mahakam. 16 hal. (Dalam proses penerbitan di Jurnal Penelitian Perikanan Indonesia).

[17] Pescod, M.B.,1973, Investigation of Rational Effluent and Stream Standards for Tropical Countries. AIT Bangkok. 59 p.

[18] Purnomo, K., D.W. H. Tjahjo, H.Suharto, C. Umar & A. Sarnita, 1992, Penelitian potensi sumberdaya perairan Danau Semayang, Melintang dan Jempang di Kalimantan Timur. Prosiding Seminar Hasil Penelitian Perikanan Air Tawar 1991/1992. Balitkanwar, Bogor. Hal.274-284.

[19] Priyono, A.,1994, Telaah habitat Pesut (Orcaella brevirostris Gray, 1866) di Danau Semayang dan sekitarnya. Media Konservasi. Fak. Kehutanan IPB, Bogor. 4(3):53-60.

[20] Purnomo, K.,1994, Potensi sumberdaya perikanan di Danau Semayang dan Melintang. Frontir. Universitas Mulawarman. Samarinda, 14:123-136.

[21] Riyanto, W.,1996, Komposisi jenis ikan di beberapa tipe habitat Danau Semayang, Kalimantan Timur. Dalam: Anonimus (Eds). Pendayagunaan dan Rehabilitasi Lingkungan Perairan Danau Semayang Kalimantan Timur, Puslitbang Ekonomi dan Pembangunan LIPI, Jakarta: 53-66.

[22] Ridgway, S.H. & S.R. Harrison, 1989, Handbook of marine mammals. Vol.4, River Dolphins and the Larger Toothed Whales. Academic Press Limited, Toronto. 441 p.

[23] Weber, M. & K.L.F. de Beaufort, 1913, The fisheries of Indo-Australia archipelago. Vol. II. E.J. Brill. Ltd., Leiden: 404 pp.

[24] Weber, M. & K.L.F. de Beaufort, 1916, The fisheries of Indo-Australia archipelago. Vol. III. E.J. Brill. Ltd., Leiden: 455 pp.

[25] Weber, M. & K.L.F. de Beaufort, 1922, The fisheries of Indo-Australia archipelago. Vol. IV. E.J. Brill. Ltd., Leiden: 410 pp.

[26] Welcomme, R.L.,1979, Fisheries Ecology of Floodplain River. Longman Inc., London. 317 p.

[27] Welcomme, R.L.,2001, Inland Fisheries, Ecology, and Management. Fishing News Books, A Division of Blackwell Science Ltd, London. 358 p.

[28] Yustiawati & D.I. Hartoto, 2004, 7. Distribution of Aquatic Humic Substances in Lake Loa Kang Floodplain System. In: Monograph No. 3. Ecological Integrity of A Mahakam Floodplain System, by D.I. Hartoto and Yustiawati (Eds), Research Centre for Limnology, Indonesian Institute of Sciences, ISBN 979 3688-25- 4:73-80.