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Jurnal Biologi Tropis
Published by Universitas Mataram
ISSN : 14119587     EISSN : 25497863     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology
Jurnal Biologi Tropis (ISSN Cetak 1411-9587 dan ISSN Online 2549-7863) diterbitkan mulai tahun 2000 dengan frekuensi 2 kali setahun oleh Program Studi Pendidikan Biologi PMIPA FKIP Universitas Mataram, berisi hasil penelitian dan ulasan Ilmiah dalam bidang Biologi Sains.
Arjuna Subject : -
Articles 2,269 Documents
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PENGGUNAAN MOLUSISIDA JAYANTI DALAM MENGATASI HAMA KEONG MAS DI DESA BUNUT BAOK LOMBOK TENGAH Suripto, Gunawan, E.R., Aryanti dan Sukiman
Jurnal Biologi Tropis Jurnal Biologi Tropis. Vol.13 No. 2 Desember 2013
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (351.379 KB) | DOI: 10.29303/jbt.v13i2.145

Abstract

ABSTRAKAkibat serangan keong mas, produksi padi menurun hingga 30% di beberapa tempat di Provinsi NusaTenggara Barat. Desa Bunut Baok Lombok Tengah adalah termasuk sentra penghasil padi yangmengalami gagal panen akibat serangan keong mas. Kegiatan penerapan iptek bagi masyarakat (IbM)untuk mengatasi masalah hama keong mas telah dilakukan di desa tersebut. Kegiatan IbM diawalidengan koordinasi Tim Pelasana IbM dengan Ketua Kelompok Tani Mohon Petunjuk di Desa BunutBaok untuk memantapkan persiapan dan sosialisasi teknik pelasanaan IbM. Program IbM dilakukandengan materi meliputi karakteristika tanaman jayanti (Sesbania sesban) dan cara pembudidayaannya,karakteristika jenis keong mas yang merupakan hama tanaman padi, cara penyiapan dan pembuatanbahan molusisida dari tanaman jayanti, dan aplikasinya untuk mengendalikan keong mas hamatanaman padi. Kegiatan IbM menggunakan berbagai media yang meliputi papan tulis, LCD, biji, danspecimen tanaman jayanti dewasa, serbuk kering daun jayanti, specimen keong mas hidup, air, danalat-alat pertanian untuk pembuatan dan aplikasi molusisida di sawah padi. Metode yang digunakanmeliputi ceramah, demonstrasi, pelatihan, dan diskusi. Kegiatan IbM diikuti oleh 12 orang anggotaKelompok Tani Mohon Petunjuk Desa Bunut Baok. Hasil yang dicapai adalah meliputi meningkatnyaapresiasi petani terhadap tanaman jayanti, meningkatnya pengetahuan dan keterampilan petani dalammengidentifikasi tanaman jayanti, terampil untuk membuat bahan molusisida dari tanaman jayanti,dan penggunaannya untuk mengendalikan keong mas hama tanaman padi.Kata-kata kunci: Tanaman jayanti, keong mas hama tanaman padi, Desa Bunut BaokABSTRACTFest of gold snail (keong mas) is the main factor of 30% reduction of rice production in some parts ofthe Province of Nusa Tenggara Barat, including Bunut Baok Village in the District of CentralLombok. Iptek application for community activity (IACC) was done to solve the problem in BunutBaok village. Coordination between team of IACC and the head of farmer group, Mohon Petunjuk inBunut Baok village done first to make sure the plant and socialization thechnic activity of IACC. TheIACC program done with course including characteristics and cultivication method of jayanti plant(Sesbania sesban) and characteristics of gold snail as a pest of rice plant. The media used for IACCactivity were white board, LCD, seeds and specimen of adult jayanti plant, dray powder of jayanti leaf,life gold snail specimen, water, and farming tools to make and application of molluside in paddy field.Method for IACC activity were classroom talking, demonstration, exercise, and discussion. Theparticipants of IACC activity were 12 person members of farmer group, Mohon Petunjuk Bunut Baokvillage. The result of this activity was improvement of farmer appreciation on jayanti plant,knowledge, and skill to make and applied anti mollusk from jayanti plant for controlling of gold snail,pest of rice plant.Key words: Jayanti, gold snail, pest of rice plant, Bunut Baok village
Karakteristik Bioekologi Rajungan (Portunus Pelagicus) Di Perairan Dusun Ujung Lombok Timur Didik Santoso; Ahmad Raksun; karnan .; Lalu japa
Jurnal Biologi Tropis Jurnal Biologi Tropis. Vol.16 No.2 Desember 2016
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (191.57 KB) | DOI: 10.29303/jbt.v16i2.312

Abstract

ABSTRAK Penelitian ini bertujuan untuk mengkaji ukuran rajungan yang tertangkap, menganalisis perbandingan jumlah rajungan jantan dan betina yang tertangkap, dan  menganalisis karakteristik habitat (salinitas, suhu, pH, dan bentuk dasar substrat perairan) di daerah penangkapan rajungandi Dusun Ujung Lombok Timur. Jenis penelitian ini adalah penelitian diskriptif dengan menggunakan metode survai dalam pengambilan data. Parameter yang diteliti adalah parameter biologi dan ekologi rajungan. Parameter biologi yang diamati adalah  jenis kelamin, dan lebar karapas, sedangkan parameter ekologi adalah suhu, salinitas, dan pH perairam serta bentuk dasar substrat. Kondisi substrat didominasi oleh fraksi pasir diikuti oleh fraksi lumpur dan fraksi liat. Hasil penelitian menunjukkan bahwa kualitas air di daerah penelitian sangat sangat layak bagi kehidupan rajungan, dengan sebaran suhu antara 290C – 300C. Salinitas perairan di daerah penelitian berkisar dari 31 sampai 32  ppt, dan Nilai pH perairan di lokasi penelitian berkisar antara 7.2 sampai 7.5. Distribusi lebar karaps rajungan di dominasi oleh lebar diatas 100 mm baik jantan maupun betina. Proporsi lebar karapas rajungan jantan yang tertangkap dengan lebar diatas 100 mm adalah sebesar 41,7% dan betina sebesar 48,3% dari total sampel penelitian. Nisbah kelamin antara rajungan jantan dan betina adalah 0,8 : 1. Hal ini menunjukkan bahwa rajungan jantan dapat membuahi lebih dari satu rajungan betina.Kata-Kata Kunci: Bio-ekologi, diskriptif, karakteristik habitatABSTRACTThis study aims to assess the size of the crabs are caught, analyzing the ratio of male and female, and analyze the habitat characteristics (salinity, temperature, pH, and form of the substrate waters) in crab fishing area in the Ujung Vilage of East Lombok District.This research is a descriptive study using survey methods in data collection.The parameters studied are biological and ecological parameters. Biological parameters measured were sex and carapace width, while the ecological parameters are temperature, salinity, and pH of the water and the form of the substrate.The results showed that the water quality in the study area were very feasible for the life of crab, with a distribution of temperature between 290C - 300C.Salinity waters in the study area ranged from 31 to 32 ppt, and water pH value in the study site ranged from 7.2 to 7.5.Karaps wide distribution crab dominated by width exceeding 100 mm in both males and females. The proportion of carapace width of male crabs are caught with a width exceeding 100 mm is 41.7% and females at 48.3% of the total sample.Rajungan sex ratio between males and females was 0.8: 1. This shows that the male crab can fertilize more than one female crabs. Keywords: Bio-ekologi, descriptive, habitat characteristics
KEANEKARAGAMAN DAN KELIMPAHAN DIATOM (Bacillariophyceae) DI PANTAI JERANJANG DESA TAMAN AYU KECAMATAN GERUNG KABUPATEN LOMBOK BARAT Hasanah Nurlaelatun, Lalu Japa, Didik Santoso
Jurnal Biologi Tropis Vol. 18 No. 1 (2018): Januari - Juni
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (520.109 KB) | DOI: 10.29303/jbt.v18i1.561

Abstract

Pantai Jeranjang yang terletak di desa Taman Ayu merupakan salah satu daerah buangan limbah cair karena terdapat PLTU (Pembangkit Listrik Tenaga Uap) yang menggunakan air laut sebagai pendingin dan akhirnya dibuang kembali ke laut. Tujuan penelitian ini yakni untuk mengetahui keanekaragaman dan kelimpahan diatom (Bacillariophyceae) di Pantai Jeranjang Desa Taman Ayu Kecamatan Gerung Kabupaten Lombok Barat. Metode penentuan titik sampling dan waktu sampling menggunakan purposive sampling method. Data diatom dianalisis untuk parameter indeks keanekaragaman, indeks kemelimpahan, indeks kemerataan dan nilai penting. Persen kesamaan antar stasiun ditentukan berdasarkan Bray Curtis Cluster Analysis menggunakan program biodiversity versi 2. Hasil penelitian menunjukkan spesies diatom yang teridentifikasi di Pantai Jeranjang terdiri dari 1 kelas, 2 ordo, 17 genus dan 26 spesies. Kemelimpahan spesies diatom di perairan Pantai Jeranjang sebesar 786,944individu/liter. Indeks keanekaragaman spesies diatom tergolong sedang yakni 1,383 dan kemerataan spesies diatom yakni 0,424 (penyebaran kurang merata). Hasil Bray-Curtis cluster analysis menunjukkan bahwa berdasarkan parameter biologi dan gabungan antara parameter bilogi dan parameter lingkungan, persen kesamaan tertinggi terdapat antara titik sampel I dan titik sampel II berturut-turut sebesar 78,781% dan 80,63%. Sedangkan berdasarkan parameter lingkungan persen kesamaan tertinggi terdapat antara titik  sampel I dan titik sampel III sebesar 99,030 %. Kata Kunci :Pantai Jeranjang, PLTU, Diatom ABSTRACT Jeranjang coastal waters is a part of Taman Ayu village. The coastal waters of Jeranjang has been an area of liquid waste disposal of the Electric Steam Power Plant Jerajang. The purpose of this research were to know diversity and abundance of diatom (Bacillariophyceae) inthe coastal waters of Jerajang Taman Ayu village Gerung districts west Lombok. Sites and times of sampling were determined by using purposive sampling method. Data of diatom were analyzed for density,diversity, andevenness indexs and percentage important value. Percentage similarity of among stations was determined based on the Bray-Curtis cluster analysis using biodiversity program-version two. The results showed that diatom species of Jeranjang coastal waters consist of 1 class, 2 orders, 17 genus and 26 species. The abundance of diatom community in Jeranjang coastal waters was 786,944individu/liter. Diversity and evenness indexs of diatom species were 1,383 (intermediate status) and 0,424  (lack of dispersal). The highest percentage similarity was on biological parameters and the relationship between biological parameters and environmental parameters for between sample site I and sample site II (78,781% and 80,63%). Based of environmental parameters the percentage similarity of between sample site I and III was of 99.030%. Key words :Jerajang Coastal Water,Electric Steam Power Plant, Diatom
Pengaruh Pemberian Ragi Roti dengan Dosis yang Berbeda Terhadap Pertumbuhan Populasi Brachionus Plicatilis Iksan, Muhammad Junaidi dan Alis Mukhlis
Jurnal Biologi Tropis Jurnal Biologi Tropis. Vol.16 No. 1 Juni 2016
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (104.393 KB) | DOI: 10.29303/jbt.v16i1.218

Abstract

ABSTRAKPenelitian ini bertujuan untuk mengetahui dosis ragi roti yang terbaik  dalam kultur Brachionus plicatilis. Penelitian dilaksanakan pada bulan Juli - September 2015  di Laboratorium Mandiri BTN Puri Meninting Kabupaten Lombok Barat. Penelitian ini menggunakan  Rancangan Acak Lengkap (RAL) yang terdiri dari 6 perlakuan dan diulang sebanyak 3 kali, sehingga diperoleh 18 unit percobaan yaitu  perlakuan  A : tanpa pakan, perlakuan  B : pakan Nannochloropsis spp.,  perlakuan C : 7,5 mg/L, perlakuan D : 15,0 mg/L, perlakuan  E :  22,5 mg/L,  dan perlakuan  F : 30,0 mg/L. Hasil penelitian menunjukan bahwa perbedaan dosis ragi roti berpengaruh nyata terhadap pertumbuhan populasi Brachionus plicatilis, dimana kepadatan populasi tertinggi diperoleh pada dosis ragi 30,0 mg/L yaitu 90 individu/mL Kata kunci : ragi roti, pertumbuhan populasi,  Brachionus plicatilis, ABSTRACT This study aims to determine the best dose of bakers yeast in culture Brachionus plicatilis. The research was conducted in July-September 2015 in the Mandiri Laboratory of BTN Puri Meninting West Lombok District. This experiment  uses a completely randomized design ( CRD ), which consists of 6 treatments and repeated 3 times , in order to obtain 18 units of trial that treatment A : without feed , treatment B : feed Nannochloropsis spp., treatment C : 7.5 mg/L, treatment D : 15.0 mg/L , treatment E : 22.5 mg/L , and treatment F : 30.0 mg/L. The results showed that the difference in the level of baker's yeast significantly affect the population growth of Brachionus plicatilis, which obtained the highest population density in the yeast dose of 30.0 mg/L of 90 individuals/mL Key word : bakers yeast, population growth, Brachionus plicatilis
Komunitas Mikroalga di Perairan Sungai dan Muara Sungai Pelangan Kecamatan Sekotong Kabupaten Lombok Barat Widia Astuti,Sri Puji Astuti Suripto, Lalu Japa
Jurnal Biologi Tropis Jurnal Biologi Tropis vol.17 No.1 Juni 2017
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (265.647 KB) | DOI: 10.29303/jbt.v17i1.401

Abstract

Abstrak Penelitian ini bertujuan untuk mengetahui komposisi, kemelimpahan, keanekaragaman serta dominansi jenis mikroalga yang terdapat pada perairan muara sungai Pelangan Desa Pelangan Kecamatan Sekotong Kabupaten Lombok Barat. Pada penelitian ini teridentifikasi 85 jenis mikroalga. Jumlah jenis paling banyak (24 jenis) teridentifikasi pada titik IV. Jenis yang mendominasi pada titik I dan II berdasarkan nilai pentingnya yaitu Chlorococcum humicola dengan persentase nilai penting pada masing-masing titik sebesar 72,309 % dan 74,524%, pada titik III jenis dengan nilai penting yang tertinggi adalah Coscinodisccus lacustris (55,024%), pada titik IV nilai penting tertinggi dimiliki oleh Thalassiothrix fruenfeldii (15,795%), dan pada titik V jenis dengan nilai penting tertinggi adalah Rhizosolenia sp dan Thalassiothrix fruenfeldii dengan persentase nilai yang sama yaitu sebesar 21,840%. Jenis mikroalga yang selalu hadir pada semua titik pengamatan yaitu jenis Chlorococcum humicola dan Coscinodisccus lacustris. Indeks keanekaragaman jenis mikroalga tergolong dalam kategori rendah sampai sedang. Indeks keanekaragaman jenis mikroalga tertinggi terdapat pada titik IV yaitu (H’= 3,010). Kemelimpahan total tertinggi tercatat pada titik II sebesar 1.540 ind/L.Kata kunci: Mikroalga, Perairan Muara, Sungai Pelangan, dan SekotongAbstractThis study aims to determine the composition, abundance, diversity and species dominance of microalgae which found in estuary waters Pelangan, Pelangan Village District of West Lombok. In this study identified 85 species of microalgae. Species that is most widely identified at the sampling site IV (24 species). Based on the value of percentage importance, Chlorococcum humicola was a dominant species in the sites of I and II : 72.309% and 74.524%, respectively. Furthermore,  in the site of III the species with the highest percentage important value was Coscinodisccus lacustris (55.024%), and the site of IV Thalassiothrix fruenfeldii was the highest percentage importance value (15.795%). Meanwhile, in the site of V, the two species with the same percentage importance value (21.840%) were Rhizosolenia sp. and Thalassiothrix fruenfeldii. The two species of microalgae which always present in all sampling sites were Chlorococcum humicola and Coscinodisccus lacustris. The species diversity index of microalgae species was  low to moderate category. The highest species diversity index occurred in the IV site (H'= 3.010). The highest total abundance (1,540 ind/L) was recorded in the second site.Keywords : Microalga, Estuary Waters, Pelangan River, and Sekotong 
KOMPOSISI JENIS DAN KEANEKARAGAMAN FITOPLANKTON SAAT PENAMBANGAN PASIR INTENSIF DI MUARA SUNGAI POHARA SULAWESI TENGGARA Bahtiar N. Irawati
Jurnal Biologi Tropis Jurnal Biologi Tropis. Vol.13 No.1 Juni 2013
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1629.357 KB) | DOI: 10.29303/jbt.v13i1.74

Abstract

AbstractLocal communities along the banks of Pohara River have been benefited from the ecologicalservices provided by the river ecosystem. However, the increasing trend of extraction patternof natural resources through several economic activities along the river has put significantpressure on the surrounding ecosystem. One of the activities that allegedly have an impact onthe estuary productivity decline of the area is intensive sand mining operations. This recentstudy was carried out to study the composition and diversity of phytoplankton during heavysand mining season in order to provide baseline data for the better management of the area.Field work was conducted from April 2007 to February 2008 in Pohara estuary. Planktonsamples were collected from six sampling stations and analyzed using quantitative descriptivemethod. Results of the study found that the highest spatial and temporal distribution ofphytoplankton species found in the areas were phytoplankton from the classes ofChlorophyceae and Dinophyceae while the lowest was from the class of Euglenophyceae.Two species found in every sampling station were Euglenophyceae and Cyanophyceae.Diversity index showed significant differences and categorized from high to low diversitybased on sampling stations and observation times with the values ranged between 2231-2524and 0906-2346, respectively. In addition, the uniformity index based on station andobservation times ranged between 0758-0819 and 0906-2346, respectively which fell in thecategory of high and medium uniformity.Keywords : Phytoplankton, Composition, Diversity, Pohara River 
Peran Trehalose Metabolisme Sepanjang Masa Kehidupan Tanaman Prapti Sedijani
Jurnal Biologi Tropis Jurnal Biologi Tropis. Vol.15 no.2 Desember 2015
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (144.633 KB) | DOI: 10.29303/jbt.v15i2.204

Abstract

ABSTRAKTrehalose/T6P berperan penting bagi tahapan kehidupan tanaman dari tahap embryo, pertumbuahn vegetative, pertumbuhan generatif, hingga sanesensi melalui keterlibatannya dalam menentukan pembelahan sel, bentuk sel, arsitektur tanaman dan respon terhadap stress biotik dan abiotik. Mekanisme trehalose/T6P dalam peran tersebut melibatkan SnRK1 dan bZIP11 dengan mengintegrasikan antara ketersediaan dan penggunaan sumber karbon yang mempengaruhi pemrograman ekspresi gen-gen yang trerkait dalam anabolisme dan katabolisme serta gen-gen yang terlibat dalam respon tanaman terhadap stres biotik dan abiotik. Selain itu, protein-protein dalam lintasan metabolisme trehalose diduga terlibat juga dalam pemrograman dan aktivitas enzim-enzim target. Dengan mengetahui peran krusial metabolisme trehalose, manusia dapat memanfaatkan lintasan ini untuk kepentingan pertanian.   The Roles of Trehalose Metabolism at Entire Plant Life Abstract Trehalose/T6P has important role at entire plant stage of life starting from embryonic stage, vegetative growth, generative growth and senescence. The roles include cell devision, cell shape, plant architectecture, and plant responses to biotic and abiotic stress. Syncrunizing between energy demand and energy availability is the main mode of the roles through reprogramming of gene expression responsible for anabolism and/or catabolism processes depending on given situation including biotic and abiotic stress. Moreover, proteins of trehalose metabolism are suggested to affect enzyme activity of target proteins. SnRK1 and bZIP11 involve in all those modes. Understanding crusial roles of trehalose metabolism in plant therefore is necessary in order to get benefit from this pathway for agricultural issue. 
Pengaruh Konsentrasi Ragi Dan Lama Fermentasi Terhadap Kadar Air, Glukosadan Organoleptik Pada Tape Singkong Sahratullah, Dwi Soelistya Dyah Jekti, Lalu Zulkifli
Jurnal Biologi Tropis Jurnal Biologi Tropis vol.17 No.1 Juni 2017
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (299.838 KB) | DOI: 10.29303/jbt.v17i1.392

Abstract

Abstrak Tujuan dari penelitian ini adalah mengetahuipengaruh (1) konsentrasi ragi, (2) lama fermentasi serta (3) interaksi antara konsentrasi ragi dan lama fermentasi terhadap kadar air, glukosa dan organoleptik pada tape singkong. Penelitian dilakukan di Laboratorium Kimia Analitik Universitas Mataram dan Fakultas Keguruan dan Ilmu Pendidikan Universitas Mataram. Bahan yang digunakan dalam penelitian adalah tape singkong. Penelitian dilaksanakan secara eksperimental berdasarkan RAL pola faktorial. Faktor I konsentrasi ragi (0,5; 1 dan 1,5%) dan faktor II lama fermentasi (1, 2 dan 3 hari) dengan 3 kali ulangan. Parameter penelitian meliputi kadar air, glukosa dan organoleptik. Hasil penelitian menunjukkan bahwa(1)Konsentrasi ragiberpengaruh terhadap kadar air(p ≤ 0,05) dan organoleptik (p<0,05) tetapi tidak berpengaruh (p>0,05)pada kadar glukosatape singkong.(2) Lama fermentasiberpengaruh terhadap kadar air (p< 0,05), kadar glukosa (p<0,05) dan organoleptik (p<0,05) tape singkong.(3) Interaksi antara konsentrasi ragi dan lama fermentasi berpengaruh (p<0,05) terhadap kadar air tetapi tidak berpengaruh terhadap kadar glukosa (p>0,05) dan organoleptik (p>0,05) tape singkong. Kata kunci: konsentrasi ragi, lama fermentasi, kadar air, kadar glukosa, organoleptik,  AbstractThe purpose of this research arethe influence of (1) concentration of yeast, (2) long fermentingas well as (3) interaction between concentration of yeast and long fermentingagainst the levels of water, glucose and organoleptik on fermented cassava. Research was conducted in Laboratory ChemistryAnalytic of Mataram University and Faculty of Education of Mataram University. Material used in this research are fermented cassava. Thisresearch is experimentresearch with Random Complete Design factorial pattern. Factor I concentration of yeast (0,5; 1 and 1,5%) factor II long fermenting(1, 2 and 3day) with 3 repetition. Parameters research covering the levels of water, glucose and organoleptik. The results of this research are (1) Concentration of yeastinfluential on the levels of water (p ≤ 0,05) and organoleptik (p<0,05) but not influential (p >0,05) on glucose level of fermented cassava. (2) Long fermentinginfluential on the levels of water (p<0,05),glucose (p<0,05) and organoleptik (p<0,05) of fermentedcassava. (3) Interaction between concentration of yeast and long fermenting influential on waterlevel (p<0,05) but not influential on the levels ofglucose (p >0,05)  and organoleptik (p >0,05)  of fermented cassava. Keyword: yeast concentration, fermentations time, levels of  water, levels of glucose, organoleptik  
Penentuan Tingkat Kerentanan Pulau Guraici Berdasarkan Kapasitas Adaptif Ekosistem Pesisir Riyadi subur
Jurnal Biologi Tropis Jurnal Biologi Tropis vol.17 No.1 Juni 2017
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (591.586 KB) | DOI: 10.29303/jbt.v17i1.368

Abstract

Abstrak Pulau Guraici tergolong pulau sangat kecil, dengan luas saat ini ±0,59 hektar, luas daratan pulau ini terus mengalami degradasi sebagai akibat hilangnya ekosistem pesisir utama seperti terumbu karang, mangrove, lamun, sehingga kerentanan dari pulau tersebut  terus meningkat. Penelitian ini bertujuan menilai serta menentukan tingkat kerentanan pulau Guraici berdasarkan Kapasitas Adaptif ekosistem pesisir pula tersebut. Penelitian ini dilakukan dengan mengukur kapasitas adaptasi ekosistem terumbu karang, mangrove dan Lamun (seagrass). Hasil penelitian ini menunjukkan bahwa nilai kapasitas Adaptif ekosistem pesisir yang ditemukan di pulau tersebut yaitu 0,34, dengan kategori “sangat rendah”, yang berarati bahwa pulau Guraici memiliki kerentanan sangat tinggi. Kata kunci : Kerentanan, Kapasitas Adaptif, Ekosistem Pesisir.  Abstract Guraici Island is considered a very small island, with an area of ± 0.59 hectares, the area of the island continues to degrade as a result of the loss of major coastal ecosystems such as coral reefs, mangroves, seagrasses, so the vulnerability of the island continues to increase. This study propouse to assess and determine the vulnerability of Guraici island based on Adaptive Capacity of the coastal ecosystem. This research was conducted by measuring the adaptation capacity of coral reef ecosystem, mangrove and seagrass. The results of this study indicate that the Adaptif capacity value of coastal ecosystems found on the island is 0.37, with the category "very low", which means that Guraici island has very high vulnerability. Keywords: Vulnerability, Adaptive Capacity, Coastal Ecosystem.
DINAMIKA KOMUNITAS FITOPLANKTON DAN KUALITAS PERAIRAN DI LINGKUNGAN PERAIRAN TAMBAK UDANG INTENSIF: SEBUAH ANALISIS KORELASI Bambang Widigdo dan Yusli Wardiatno
Jurnal Biologi Tropis Jurnal Biologi Tropis. Vol.13 No. 2 Desember 2013
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (541.575 KB) | DOI: 10.29303/jbt.v13i2.150

Abstract

ABSTRAKPenelitian ini bertujuan mendeskripsikan struktur komunitas fitoplankton di tambak danperairan sekitarnya dan mengkaji korelasinya dengan kualitas perairan di lingkunganpertambakan udang intensif. Pengambilan sampel air dan fitoplankton dilakukan pada tujuhstasiun di lingkungan dan pada lima tambak. Analisis data yang digunakan adalah indekssimilaritas dan analisis komponen utama. Komunitas fitoplankton yang ditemukan terdiri dari47 genera dari enam kelas yaitu Bacillariophyceae, Dinophyceae, Cyanophyceae,Chlorophyceae, Euglenophyceae, dan Chrysophyceae, dengan dominasi umum KelasBacillariophyceae. Sementara pada tambak didominasi oleh Cyanophyceae danChlorophyceae. Kelimpahan fitoplankton di tambak cenderung meningkat seiring denganbertambahnya DOC (Day Of Culture). Kelimpahan fitoplankton menurun pada saluranpembuangan utama (canal main outlet). Penurunan ini diduga akibat adanya percampuran airbuangan dengan air laut dan efek sedimentasi di sepanjang saluran tersebut. Indeks similaritasmemperlihatkan bahwa air buangan tambak tidak mempengaruhi kelimpahan fitoplankton dilingkungan perairan sekitar area pertambakan dikarenakan konsentrasi limbah yang mencapailingkungan telah menurun akibat pengenceran pada saluran pembuangan utama. Kelimpahanfitoplankton di lingkungan perairan berkorelasi erat dengan Dissolved Inorganic Nitrogen(DIN), Dissolved Inorganic Phosphate (DIP), dan TSS. Sedangkan di kolam budidaya(tambak), kelimpahan fitoplankton berkorelasi erat dengan DIP, kecerahan, dan salinitas.Kata kunci: fitoplankton, kualitas air, tambak udang, korelasiABSTRACTThe research was amied to reveal phytoplankton community in shrimp ponds and thesurrounding waters, and to study the correlation between phytoplankton community and waterquality. Water sample and phytoplankton collections were made in seven stations in thesurrounding waters and in five shrimp ponds. Similarity index and principal componentanalyses are used for data analyses.The results showed that 47 genera phytoplankton from sixclasses (i.e. Bacillariophyceae, Dinophyceae, Cyanophyceae, Chlorophyceae,Euglenophyceae, and Chrysophyceae) were found, and it is dominated by ClassBacillariophyceae in the surrounding waters. While in the shrimp ponds, Cyanophyceae andChlorophyceae were the two dominants. The abundance of phytoplankton tended to increasewith DOC (Day Of Culture). In the shrimp pond area, especially in canal main outlet theabundance decreased due to mixing processes with sea water in the canal. Similarity index indicated that shrimp pond effluent did not affect phytoplankton community of thesurrounding waters. In the surrounding waters, phytoplankton abundance was significantlycorreated with Dissolved Inorganic Nitrogen (DIN), Dissolved Inorganic Phosphate (DIP),and TSS. While in shrimp ponds, it was significantly correlated with DIP, transparency andsalinity.Keywords: phytoplankton, water quality, shrimp pond, correlation

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