Distribusi Diatom Epilitik (Bacillariophyceae) Berdasarkan Jenis Substrat pada Zona Intertidal Kawasan Pelabuhan Palimbungan Ketek Batahan Kabupaten Mandailing Natal Provinsi Sumatera Utara

Penelitian ini dilaksanakan pada bulan Desember 2016 sampai Januari 2017 dikawasan Pelabuhan Palimbungan Ketek Batahan Kabupaten Mandailig Natal SumateraUtara dengan tujuan untuk mengetahui jenis dan distribusi diatom epilitik berdasarkanjenis substrat (kayu, semen, dan batuan alam). Metode yang digunakan adalah metodesurvey dan analisis dilakukan di Laboratorium Biologi Laut Fakultas Perikanan danKelautan. Hasil penelitian menunjukkan bahwa diatom yang ditemukan sebanyak 10spesies. Diatom epilitik dengan kelimpahan tertinggi yaitu spesies Isthmia sp. Rata-ratakelimpahan diatom epilitik tertinggi antar substrat terdapat pada substrat kayu sebesar7.686,46 ind/cm2. Kemudian rata rata kelimpahan tertinggi antar plot bagian terdapatpada substrat batuan alam plot I, II, dan III bagian bawah dengan rata-rata nilai kelimpahanyaitu 2.951,05 ind/cm2. Nilai rata-rata indeks keanekaragaman jenis (H\u27) berkisardari 0,963 - 1,672. keseragaman jenis (E) berkisar antara 0,230 – 0,611. indeksdominansi diatom (D) berkisar dari 0,367 – 0,592

Sebaran Total Suspended Solid (Tss) di Kawasan Muara Sungai Kampar Kabupaten Pelalawan Provinsi Riau

The study was conducted from January to February 2017 in Kampar River Estuary Area of Pelalawan District of Riau Province. Water sample analysis was done at the Chemical Oceanography Laboratory of the Faculty of Fisheries and Marine. This study aims to determine the distribution of TSS (total suspended solid) at high tide and low tide. The method used is survey method and determination of station point using pur-posive sampling. The results showed that the total suspended solid (TSS) distribution during tidal to low tide with the average value of the lowest TSS content at station 2 was 91 mg/l and the highest was in station 7 of 670 mg/l. At low tide, the average val-ue of the lowest TSS content at station 1 is 65 mg/l and the highest is at station 6 of 448 mg/l

The Distribution of Toxic Bhentik Dinoflagellate Gambierdiscus SP. Prorocentrum SP and Ostreopsis SP on Sargassum SP in the Coastal of Sungai Nipah, Pesisir Selatan Regency, West Sumatra Province

Ciguatera Fish Poisoning (CFP), can be caused by ciguatoxin from groups such as the bhentic dinoflagellate of Gambierdiscus sp., Ostreopsis sp., and Prorocentrum sp.,the bhentic dinoflagellates potentially toxic. In addition as bhentic organisms these three bhenthic dinoflagellates also found associated with brown algae, red algae, coral fragments and also attached on seaweed . Research on the distribution of the toxic dinoflagellate benthic Sargassum sp in the coastal waters of Sungai Nipah Beach of Pesisir Selatan Regency of West Sumatra Province was conducted in April 2014 with the to analyze the abundance and distribution of benthic dinoflagellate Gambierdiscus sp. Ostreopsis sp Prorocentrum sp. The study was conducted by taking a substrate attachment of benthic dinoflagellates from the seaweed, and then put them in a plastic screen of sea water. For the releasing of the benthic dinoflagellate the process agitation and filtration were used with filter of 250μm and 20μm. The samples observed by using microscope and Sedgwick Rafter Cell. The highest abundance was found at stations with high density (45.85 cells/gram). The research showed that the abundance and distribution of toxic dinoflagellate types of seaweed in coastal waters in Sungai Nipah was more influenced by local currents

The Community Structure of Macrozoobenthos in Intertidal Zone of Topang Island Meranti Islands Regency Riau Province

This research was conducted in December 2013 in the intertidal zone of Topang Island of Meranti Islands regency in Riau Province. This study aims was to determine the community structure of the intertidal zone macrozoobenthos in Topang Island. The method used was a survey to determine the location of the study which consisted of 7 and 3 point sampling station. Macrozoobenthos samples were taken and analyzed in a laboratory of marine biology.The result showed that, the macrozoobenthos in the study site consisted of 18 species belonging to 4 classes. Macrozoobenthos density in the study area varies where the station the highest was of stastion two (II), and the lowest at station VI. Based on the value of diversity index (H ') macrozoobenthos in the study area were at moderate meaning no dominant species and the distribution was at uniformity

Komposisi Sedimen di Perairan Muara Sungai Kampar Provinsi Riau

Penelitian ini dilakukan pada Januari 2017 di perairan Muara Sungai Kampar dengantujuan untuk mengetahui asal-usul jenis material penyusun sedimen. Eckman Grabdigunakan untuk mengambil sampel dan dari sedimen dianalisis untuk menentukankomposisi dan kandungan bahan organik. Hasil penelitian menunjukkan bahwa komposisisedimen terdiri dari biogenous lumpurdan lithogenous. Komposisi Lithogenousterutama di perairan dan mika mendominasi kehadiran merata di setiap stasiun. Komposisitertinggi ditemukan di lokasi PT. WKS dan salah satu daerah yang mendapatkanpertama kalinya pengaruh air pasang, dari Muara Sungai Pulau Muda. Lithogenouspersentase yang terendah ditemukan di daerah yang dekat dengan kawasan mangrovedi mana stasiun memiliki komposisi yang tinggi dari sampah biogenous. Sementarastasiun yang mengandung bahan organik terendah adalah stasiun perairan pemukimanpulau muda. Perairan muara sungai kampar yang mengandung bahan organik yangtinggi karena aliran sungai membawa tingginya kandungan bahan organik