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The Effect of Candlenut (Aleurites Moluccana I Willd.) Seed Flour in Native Chicken Feeding Toward the Internal Egg Quality and Cholesterol Contens Jein Rinny Leke; Florencia Sompie; Betty Bagau; Albert Podung; Cherlie Sarajar; Ratna Siahaan; Endang Pudjihastuti; Eko Widodo
Jurnal Ilmu dan Teknologi Hasil Ternak (JITEK) Vol. 17 No. 2 (2022)
Publisher : Faculty of Animal Science Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jitek.2022.017.02.1

The research aimed to examine effects of Aleurites moluccana (L.) Willd. (Candlenut) Seed Flour used in feed toward egg quality and cholesterol contents of egg-laying native chicken. The research method used was Completely Randomized Design and was continued with Duncanâ€™s test if significant different present. There were 5 treatments comprising of R0 = 100 % of Basal Diet (BD), R1 = 98.5% of Basal Diet (BD) + 1.5 % of Candlenut Seed Flour (CSF), R2 = 97 % of Basal Diet (BD) + 3% of CSF, R3 = 95.5% of Basal Diet (BD) + 4.5 % of CSF, R4 = 94% of Basal Diet (BD) + 6 % of CSF and replications, of which each replication consisted of 8 egg-laying native chickens. In addition, 50 eggs derived from egg-laying native chickens were taken weekly for quality analysis. Variables of this research were egg weight (g/egg), albumen (g/egg), yolk colour, yolk weight (g/egg), egg yolk cholesterol (mg/100g), blood cholesterol (ml/dl), blood LDL (ml/dl), blood HDL (ml/dl), and blood triglycerides (ml/dl), and egg shellâ€™s weight (g/egg) and thickness (mm). As a result, the effects of CSF up to 6 percent of feeding had significant result (P<0.01) to eggâ€™s weight, albumen, yolk colour, yolk weight, cholesterol, blood cholesterol, blood LDL, blood HDL and blood triglycerides, but not significant (p>0.05) on egg shellâ€™s weight and thickness. Therefore, the use of 6 % of Candlenut) Seed Flour in feed had positive effects to improve egg quality and cholesterol contents of egg-laying native chicken.

KUALITAS AIR SUNGAI CISADANE, JAWA BARAT - BANTEN Ratna Siahaan; Andry Indrawan; Dedi Soedharma; Lilik B Prasetyo
JURNAL ILMIAH SAINS Volume 11 Nomor 2, Oktober 2011
Publisher : Sam Ratulangi University

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 SekolahÂ 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 Â 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. Â 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

POPULASI KUPU-KUPU (LEPIDOPTERA ) DI PULAU MANTEHAGE, SULAWESI UTARA Debry C Lamatoa; Roni Koneri; Ratna Siahaan; Pience V Maabuat
JURNAL ILMIAH SAINS Volume 13 Nomor 1, April 2013
Publisher : Sam Ratulangi University

POPULASI KUPU-KUPU (LEPIDOPTERA ) DI PULAU MANTEHAGE, SULAWESI UTARA ABSTRAK Kupu-kupu berperan penting dalam ekosistem dan dapat membantu proses penyerbukan pada tumbuhan. Penelitian ini bertujuan untuk mengkaji populasi Â kupu-kupu di Pulau Mantehage, Sulawesi Utara. Pengambilan sampel kupu-kupu dilakukan dari Maret sampai Mei 2013 di Pulau Mantehage, Sulawesi Utara. Â Â Â Kupu-kupu dikoleksi dengan menggunakan metode sweeping yang diterapkan secara acak sepanjang 500m. Hasil penelitian Â menunjukkan bahwa kupu-kupu di Pulau Mantehage ada 19 spesies yang termasuk ke dalam 4 famili yaitu Nymphalidae, Papilionidae, Pieridae dan Riodinidae. Spesies kupu-kupu yang paling banyak ditemukan yaitu Catopsilia scylla asema. Famili yang paling banyak ditemukan yaitu Famili Nymphalidae dengan jumlah spesies sebanyak 11 spesies. Kupu-kupu yang paling sedikit Â yaitu Famili Riodinidae yang memiliki jumlah satu spesies. Kata kunci : Populasi kupu-kupu, Pulau Mantehage, Sulawesi Utara. POPULATION OF BUTTERFLY (LEPIDOPTERA) IN MANTEHAGE ISLAND, NORTH SULAWESI ABSTRACT Butterfly has ecological functions for pollination and as biodicator of ecosystem change. This study was conducted for studying butterfly population in Mantehage Island, North Sulawesi. Butterfly sampling conducted in March until May 2013 in Mantehage island, North Sulawesi. Butterfly were collected by using random sweeping along 500 m. The result showed there were 19 species in 4 families i.e. Nymphalidae, Papilionidae, Pieridae dan Riodinidae. The most commonly butterfly found was Catopsilia scylla asema. The most common family was Nymphalidae with numbers of species were 11 species. The least family was Riodinidae with only 1 species. Keywords: Butterfly population, Mantehage Island, North Sulawesi.

MAKROZOOBENTOS SEBAGAI INDIKATOR BIOLOGIS DALAM MENENTUKAN KUALITAS AIR SUNGAI RANOYAPO, MINAHASA SELATAN, SULAWESI UTARA Rifgah Marmita; Ratna Siahaan; Roni Koneri; Marnix L Langoy
JURNAL ILMIAH SAINS Volume 13 Nomor 1, April 2013
Publisher : Sam Ratulangi University

MAKROZOOBENTOS SEBAGAI INDIKATOR BIOLOGIS DALAM MENENTUKAN KUALITAS AIR SUNGAI RANOYAPO, MINAHASA SELATAN, SULAWESI UTARA ABSTRAK Sungai Ranoyapo merupakan sungai terpanjang di Wilayah Minahasa dengan panjang sekitar 60, 5 Km. Sungai Ranoyapo adalah sungai utama Â DAS Ranoyapo yang memiliki luas sekitar 87,154 Ha.Â Sungai Ranoyapo melintasi kawasan pertanian, perkebunan, permukiman penduduk, dan industri. Limbah yang berasal dari kawasan tersebut mempengaruhi kualitas air Sungai Ranoyapo. Makrozoobentos dapat digunakan sebagai parameter biologi dalam menentukan kondisi sungai karena hidupnya relatif diam di dasar sungai. Â Â Penelitian ini bertujuan untuk menentukan kualitas air Sungai Ranoyapo berdasarkan indeks keanekaragaman makrozoobentos. Â Â Penelitian dilakukan pada musim hujan yaitu Januari-Maret 2013. Â Lokasi penelitian ditentukan dari bagian hulu, tengah dan hilir sungai dengan 3 ulangan di tiap lokasi. Â Â Kualitas air Sungai Ranoyapo ditentukan berdasarkan indeks keanekaragaman makrozoobentos dari Shannon Wiener (Hâ€™) menurut kriteriaÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Staub et al (1970). Â Makrozoobentos di Sungai Ranoyapo terdiri dari 3 Filum, 5 Kelas, 13 Bangsa, 21 Suku, dan 23 Marga. Indeks keanekaragaman makrozoobentos dari Stasiun I (hulu), Stasiun II (tengah) dan Stasiun III (hilir) yaitu 2,43; 2,06; dan 1,77. Kualitas air Sungai Ranoyapo di Stasiun I dan di Stasiun II telah tercemar ringan dengan indeks Â Â Â Â Â Â Hâ€™: 2,0 â€“ 3,0 (Hâ€™>2). Â Â Kualitas air Sungai Ranoyapo di Stasiun III telah tercemar sedang dengan indeks Â Â Â Â Hâ€™ sekitar 1,0 â€“ 2,0 (Hâ€™ <2). Kata kunci: Sungai Ranoyapo, kualitas air, pencemaran air, keanekaragaman makrozoobentos MACROZOOBENTHOS AS BIOINDICATOR IN DETERMINING WATER QUALITY OF RANOYAPO RIVER, SOUTH MINAHASA, NORTH SULAWESI ABSTRACT Ranoyapo River is the longest river in the Minahasa Region with its length ofÂ 60.5 Km. Ranoyapo River is the main river watershed Ranoyapo which its area of 87.154 ha. Ranoyapo River crosses agricultural, plantation, resident, and industry areas. Waste originated from those areas will affect water quality of Ranoyapo River. Macrozoobenthos can be used as a biological parameter in determining the condition of the river because they relatively slow move on the riverbed. This study aims to determine the water quality of the River Ranoyapo based on biodiversity index of macrozoobenthos. The study was conducted during the rainy season i.e. from January to March 2013. Three locations were chosen from upstream, midstream and downstream river with 3 replications in each location. The quality of Ranoyapo River was determined by the biodiversity index Shannon Wiener (H') of macrozoobenthos using classification of Staub et al (1970. Macrozoobenthos of Ranoyapo River consisted of 3 Phyla, 5 Classes, 13 Orders, 21 Families, and 23 Genus. Biodiversity index (Hâ€™) of macrozoobenthos from up (Station I), middle (Station II) and downstream (Station III) respectively were 2.43; 2.06, and 1.77. The quality of Ranoyapo River at up and middle were lightly polluted with index Hâ€™: 2.0 to 3.0 (H '> 2.0) and at down was moderately polluted with index H ': 1.0 to 2.0 (H' <2). Keywords: Ranoyapo River, water quality, water pollution, macrozoobenthos biodiversity

ANALISIS KUALITATIF RESIDU PESTISIDA PROFENOFOS PADA TANAMAN TOMAT DI KECAMATAN LANGOWAN BARAT SULAWESI UTARA Winda Charolina Wariki; Ratna Siahaan; Marhaenus Rumondor
JURNAL ILMIAH SAINS Volume 15 Nomor 1, April 2015
Publisher : Sam Ratulangi University

ABSTRAK Tomat merupakan tanaman hortikultura sayuran buah yang penting bagi kesehatan manusia. Penggunaan pestisida yang tidak tepat dapat memberikan dampak negatif pada lingkungan dan manusia. Pestisida profenofos digunakan oleh petani tanaman tomat untuk mengendalikan hama. Penelitian ini bertujuan untuk menganalisis kualitatif residu pestisida profenosfos pada tanaman tomat di Kecamatan Langowan Barat-Sulawesi Utara. SampelÂ yang digunakan berjumlah dua belas sampel yang diperoleh dari akar, batang, daun dan buah dengan masing-masing tiga ulangan. Analisis kualitatif adanya residu pestisida profenofos diketahui berdasarkan waktu retensi profenofos dari Kromatografi Cair Kinerja Tinggi (KCKT) di Laboratorium Farmasi, FMIPA Universitas Sam Ratulangi. Hasil menunjukkan jika residu pofenofos ditemukan pada akar, batang dan buah tomat namun tidak ditemukan pada daun tomat. Kata kunci: tanaman tomat, residu profenofos, waktu retensi, KCKT, Sulawesi Utara Â QUALITATIVE ANALYSIS OF PESTICIDE PROFENOFOS RESIDUES ON TOMATO PLANTS IN LANGOWAN WEST SUB DISTRICT NORTH SULAWESI ABSTRACT Tomatoes are horticulture crops that are important for human health. The inappropiate pesticide usage in controlling pest of tomatoes Â pesticide can give negative impact on the environment and human health. Pesticide used by farmers to control pests of tomato plants. This study aims was to analyse qualitative profenosfos pesticide residues in tomato plants at West Langowan Sub District - North Sulawesi. All samples were obtained from roots, stems, leaves and fruits with three replications each. The presence of pesticide profenofos residues would be known from retention time resulted by HPLC at Laboratory of Pharmacy, FMIPA University of Sam Ratulangi. Resuls showed that profenofos residues are found in roots, stems and fruits but not in leaves of tomatoes. Keywords: tomatoes, profenofos residue, retention time, HPLC, North Sulawesi

STRUKTUR DAN KOMPOSISI FITOPLANKTON DI BAGIAN HULU SUNGAI SALUESEM, MINAHASA, SULAWESI UTARA Amanda T.C Nalang; Herni E.I Simbala; Nio Song Ai; Ratna Siahaan
JURNAL ILMIAH SAINS Volume 15 Nomor 2, Oktober 2015
Publisher : Sam Ratulangi University

STRUKTUR DAN KOMPOSISI FITOPLANKTON DI BAGIAN HULU SUNGAI SALUESEM, MINAHASA, SULAWESI UTARA Amanda T.C Nalang1), Herni E.I. Simbala1), Nio Song Ai1), Ratna Siahaan1) ABSTRAK Sungai Saluesem termasuk perairan terbuka yang mengalir (lotik) yang berasal dari Gunung Mahawu, Minahasa dan bermuara ke Teluk Manado yang terletak di Kota Manado, Sulawesi Utara. Hulu sungai merupakan daerah konservasi tanah dan air yang sangat penting dalam mempertahankan kualitas air Sungai Saluesem dari hulu hingga hilir. Kegiatan manusia dari permukiman, pertanian dan peternakan yang terus meningkat di hulu Sungai Saluesem dapat menyebabkan terjadinya penurunan kualitas perairan. Tujuan penelitian adalah menganalisis struktur dan komposisi fitoplankton bagian hulu Sungai Saluesem, Minahasa, Sulawesi Utara. Penelitian dilaksanakan dari Oktober 2014 sampai Desember 2014. Penelitian menggunakan metode purposive random sampling. Pengulangan dilakukan sebanyak 3 kali ulangan di tiap titik pengamatan, dengan demikian terdapat enam titik (2 x 3) pengamatan di hulu.Fitoplankton yang didapatkan di hulu Sungai Saluesem sebanyak 1700 individu dari 32 spesies dan 3 kelas. Kelas fitoplankton yaitu Bacillariophyceae, Chlorophyceae, dan Cyanophyceae. Kepadatan tertinggi berasal dari Kelas Bacillariophyceae 2214 individu/m3 (84%) diikuti Kelas Chlorophyceae 349 individu/m3 (13%) lalu Cyanophyceae 72 individu/m3 (3%). Indeks keanekaragaman di Hulu Sungai Saluesem yaitu 2,92 yang termasuk keanekaragaman sedang. Distribusi Spesies fitoplankton di bagian hulu merata dengan indeks kemerataan (E) yaitu 0,64. Tidak ada spesies fitoplankton yang mendominasi di Hulu Sungai dengan indeks dominansi mendekati nol yaitu 0,18. Kualitas air Sungai Saluesem bagian hulu dikategorikan tercemar ringan dengan indeks Hâ€™ yaitu 2,92. Sumber pencemaran di lokasi penelitian diduga berasal dari kegiatan rumahtangga (MCK) dan peternakan. Kata Kunci: Sungai Saluesem, Struktur Fitoplankton, Komposisi fitoplankton, Kualitas Air, Â Sulawesi Utara STRUCTURE AND COMPOSITION OF PHYTOPLANKTON OF UPSTREAM SALUESEUM RIVER, MINAHASA, NORTH SULAWESI ABSTRACT Saluesem River is a lotic ecosystem that started from Mahawu Mountain, Minahasa and to Manado Bay, North Sulawesi. Upstream Salusem River is an important soil and water conservation area for to maintain quality of Salusem River from upstream to downstream. Increasing human activities from settlement, agriculture and animal husbandry can decrease quality of Salusem River. The aim of this research was to analysis phytoplankton structure and composition of upper Salusem River, Â Minahasa, North Sulawesi. The research was conducted from October 2014 to December 2014. The study applied purposive random sampling method with three repetitions. The number of phytoplanktons were 1700 individuals from 32 species and 3 classes, namely Bacillariophyceae, Chlorophyceae, and Cyanophyceae. The highest density is Bacillariophyceae 2214 ind/m3 (84%) followed by Chlorophyceae 349 ind/m3 (13%) and Cyanophyceae 72 ind/ m3 (3%). The diversity index of Saluesem River phytoplankton is 2.92 categorized into middle diversity. Â Evenness Index is 0.64 showed equal distribution. There is no dominant species showed by dominance index is 0.18. Based on diversity index Hâ€™ is 2.92, water quality of Salusem River upstream are categorized into light pollution. Different sources of pollution were household, agriculture, animal husbandary activities. Keywords: River Saluesem, structure phytoplankton, composition phytoplankton, water quality, North Sulawesi,

STRUKTUR DAN KOMPOSISI FITOPLANKTON DI BAGIAN TENGAH DAN HILIR SUNGAI SALUESEM - SULAWESI UTARA Jeane O.K Tiwow; Herni E.I Simbala; Sendy Rondonuwu; Ratna Siahaan
JURNAL ILMIAH SAINS Volume 15 Nomor 2, Oktober 2015
Publisher : Sam Ratulangi University

STRUKTUR DAN KOMPOSISI FITOPLANKTON DI BAGIAN TENGAH DAN HILIR SUNGAI SALUESEM - SULAWESI UTARA ABSTRAK Sungai Saluesem berasal dari Gunung Mahawu melintasi Kota Manado sebelum bermuara di Teluk Manado, Sulwesi Utara. Penelitian dilakukan di bagian tengah dan hilir Sungai Salueseum, Sulawesi Utara dari April hingga November 2014. Penelitian ini bertujuan untuk menganalis ke struktur dan komposisi fitoplankton di bagian tengah dan hilir Sungai Saluesem, Sulawesi Utara. Penelitian menggunakan metode purposive random sampling untuk menentukan lokasi penelitian. Dua stasiun penelitian disebarkan di tiap bagian sungai. Sebanyak tiga ulangan dilakukan di tiap stasiun. Total banyaknya sampel yaitu dua belas (2x2x3) sampel yang diperoleh dengan plankton net ukuran 30 mesh. Hasil penelitian menunjukkan bahwa fitoplankton yang didapatkan di bagian tengah Sungai Saluesem sebanyak 399 individu, 28 spesies dan 3 kelas.Â Fitoplankton yang didapatkan di bagian hilir Sungai Saluesem sebanyak 913 individu, 26 spesies dan 4 kelas. Kelas fitoplankton yaitu Bacillariophyceae, Chlorophyceae dan Cyanophyceae dan Euglenophyceae. Kelas Bacillariophyceae merupakan kelas yang memiliki kepadatan tertinggi di bagian tengah dan hilir berturut-turut yaitu 4067 individu/m3 (81%) dan 14950 individu/m3 (95%). Indeks keanekaragaman di bagian tengah dan hilir termasuk keanekaragaman sedang dengan nilai Hâ€™ bagian tengahÂ (Hâ€™: 2,88) dan hilir (Hâ€™: 2,64). Distribusi species fitolankton di bagian tengah dan hilir merata dengan Indeks Kemerataan (E) Â berturut-turut yaitu 0,87Â dan 0,81. Â Tidak ada species fitoplankton di bagian tengah yang mendominansi dengan nilai Indeks Dominansi (D) mendekati nol (0,222). Beberapa species fitoplankton di bagian hilir mendominansi dengan nilai Indeks D mendekati satu (0,544). Kualitas air Sungai Saluseum di bagian tengah dan hilir dikategorikan tercemar ringan. Kata kunci : Sungai Saluesem, struktur fitoplankton, komposisi fitoplankton, kualitas air, Sulawesi Utara. STRUCTURE AND COMPOSITION OF PHYTOPLANKTON OF MIDDLE AND DOWNSTREAM SALUESEUM RIVER, NORTH SULAWESI ABSTRACT Saluesem River originated from Mahawu Mount crosses the Manado City before down to Manado Bay, North Sulwesi. The study was conducted in the middle and lower part of Salueseum River, North Sulawesi from April to November 2014. This study aims to analyze the structure and composition of the phytoplankton at the middle and lower part of the River Saluesem, North Sulawesi. Research used purposive random sampling to choose researc locations. Two research stations were distributed in each part of the river. A total of three replications performed at each station. The total number of samples that were twelve (2x2x3) samples by plankton net 30 mesh. The results showed that phytoplankton at the middle as 399 individuals, 28 species and 3 classes. Phytoplankton were at down as 913 individuals, 26 species and 4 classes i.e. Â Bacillariophyceae, Chlorophyceae and Cyanophyceae and Euglenophyceae. Bacillariophyceae has the highest density at the middle and downstream respectively were 4067 individuals/m3 (81%) and 14950 individuals/m3 (95%). Diversity index (Hâ€™) at middle and downstream were classified into middle diversity with index respectively 2.88 and 2.64. Evenness index (E) at middle and down respectively were 0.87 and 0.81 showed that phytoplankton distributed equally. Some species at middle were dominant (D:0.222) but not at downstream (D: 0,544). Water quality of middle and downstream Saluseum River were classified into light pollution. Keyword: Saluesem River, structure phytoplankton, composition phytoplankton, water quality, North Sulawesi.

KEANEKARAGAMAN VEGETASI RIPARIAN DI SUNGAI TEWALEN, MINAHASA SELATAN-SULAWESI UTARA Arman Hi Bando; Ratna Siahaan; Marnix D Langoy
JURNAL ILMIAH SAINS Volume 16 Nomor 1, April 2016
Publisher : Sam Ratulangi University

KEANEKARAGAMAN VEGETASI RIPARIAN DI SUNGAI TEWALEN, MINAHASA SELATAN - SULAWESI UTARAABSTRAK Vegatasi riparian merupakan sumberdaya alam yang mudah terganggu akibat aktivitas manusia misalnya konversi riaria menjadi lahan permukiman, pertanian dan industri. Vegetasi riparian dapat berfungsi mempertahankan kualitas air. Penelitian ini bertujuan untuk menganalisis keanekaragaman vegetasi riparian di Sungai Tewalen, Minahasa Selatan - Sulawesi Utara. Metode purposive digunakan untuk menentukan lokasi dan pengelompokan berdasarkan kriteria pertumbuhan untuk memperoleh data kekayaan jenis dan kelimpahan. Sebanyak 3 stasiun penelitian ditentukan yaitu hulu, tengah dan hilir. Tiga ulangan dilakukan di tiap stasiun. Data dianalisis secara deskriptif berdasarkan Indeks keanekaragaman jenis Shannon - Wienner (Hâ€™), Indeks Kemerataan dan Indeks Kesamaan Jenis Sorensen. Kekayaan jenis egetasi riparian sebanyak lima puluh enam (56) jenis yeng termasuk dalam tiga puluh (30) suku. Tiga (3) suku terbesar yaitu Poaceae (22%), Cyatheaceae (13%) dan Araceae (11%). Keanekaragaman vegetasi riparian pada tingkat rumput hingga pohon di lokasi penelitian termasuk sedang (Hâ€™ 1â‰¤ H â‰¤ 3). Vegetasi riparian di Sungai Tewalen secara umum memiliki tingkat kemerataan yang tinggi yaitu mendekati 1 yang menunjukkan jumlah individu masing-masing jenis sama atau tidak jauh berbeda. Kesamaan jenis antar stasiun penelitian rendah yang menunjukkan adanya perbedaaan komunitas vegetasi riparian antar stasiun. Kata kunci: Vegetasi riparian, Sungai Tewalen, Minahasa Selatan, Sulawesi Utara Â RIPARIAN VEGETATION DIVERSITY OF TEWALEN RIVER,SOUTH MINAHASA REGENCY- NORTH SULAWESI ABSTRACT Riparian vegetation is natural resource easily disturbed by human activities such as conversion of riparia to be settlement, agriculture and industry areas. Riparian vegetation serves to maintain water quality. This study aimed to analyze the diversity of riparian vegetation of Tewalen River, South Minahasa - North Sulawesi. Purposive sampling method was used to determine the locations and grouping based on growth criteria to obtain data on species richness and abundance. Three (3) research locations were determined that were up, mid and downstream parts. Three replications were applied at each location. Data were analyzed descriptively based on species diversity index Shannon - Wienner (H '), Evenness Index and Sorensen Similarity Index. Species richness of riparian vegetation were fifty-six (56) species were grouped into thirty (30) families. The biggest families were Poaceae (22%), Cyatheaceae (13%) and Araceae (11%). Riparian vegetation diversity from grass to trees were moderate (H '1â‰¤ H â‰¤ 3). Generally, riparian vegetation of Tewalen River had high evenness (close to 1) that showed the number of individuals of each species were same or not different. The low index of species similarity between stations showed the differences riparian vegetation communities between stations. Keywords: Riparian vegetation, Tewalen River, South Minahasa, North Sulawesi.

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