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Phytoplankton are aquatic biota that have a rapid reaction to changes in water quality. Increased activities such as tourism and KJA in Cikoncang Reservoir can potentially reduce water quality. Phytoplankton is a bioindicator of water quality, phytoplankton diversity can describe water conditions. The purpose of the study was to analyze phytoplankton diversity, water quality, and the relationship between diversity and water quality of Cikoncang Reservoir. The research was conducted in March and April 2023. There were 5 research stations taken based on the purposive sampling method. Phytoplankton diversity is generally included in moderate diversity with a stable community and the distribution of individuals of each species with a range of values of 1.857-2.122. Based on the saprobity index, it can be seen that the Cikoncang Reservoir waters are included in moderate to light pollution. Based on PCA analysis, diversity has a positive relationship or correlates with brightness, temperature, DO, pH, nitrate, and TDS. [ABSTRACT FROM AUTHOR]

Feed residues and fish waste from floating net cage activities in Kedung Ombo Reservoir are the main issues in decreasing water quality, impacting the abundance of phytoplankton as primary producers. This study aimed to evaluate the relationship of nutrients and turbidity with phytoplankton abundance. This study used a field survey method with a purposive sampling technique. Samples were collected 3 times at intervals of 1 month at 3 different stations. Samples of water and phytoplankton were taken on the surface. Data analysis using multiple linear regression. The results showed that the nitrate concentration was 0.2–0.7 mg/L; phosphate 0.1–0.87 mg/L; and turbidity of 3.52–20.18 NTU. The phytoplankton abundance was 17,882–90,280 cells/L with a low diversity index (1.127–1.849), a high uniformity index (0.406–0.701), and a low dominance index (0.243–0.557). There is a strong correlation between nutrients, turbidity, and phytoplankton abundance, with a value of r = 0.800. The coefficient of determination (R2) = 0.640 indicates that phytoplankton abundance is influenced by nutrients and turbidity by 64%, while other factors influence the remaining 36%. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agriculture & Nature / Kahramanmaraş Sütçü İmam Üniversitesi Tarım & Doğa Dergisi is the property of Kahramanmaras Sutcu Imam Universitesi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Bu araştırmada, Kuzey Kıbrıs Türk Cumhuriyeti’nde bulunan 12 göletin fitoplanktonik organizmaları taksonomik ve ekolojik yönden incelenmiştir. Her gölet için, sadece bir adet örnekleme istasyonu seçilmiştir. 22 Haziran 2002’de 12 istasyondan 60 μ göz açıklığındaki plankton kepçesi ile toplanan örnekler % 4’lük formaldehit ile fikse edilerek, optik mikroskopta incelenmiştir. Çalışmada tayin edilen organizmaların 15’i Cyanobacteria, 24’ü Heterokontophyta, 3’ü Dinoflagellata, 9’u Euglenophyta ve 34’ü Chlorophyta’ dan olmak üzere toplam 85 fitoplankton taksonu tespit edilmiştir. Göletler, fitoplankton taksonlarının varlık ve yokluklarına baz alınarak uygulanan kümelenme ve metrik olmayan çok boyutlu ölçeklendirme analizine göre 4 gruba ayrılmıştır. Yarı kurak iklim koşullarından etkilen göletlerdeki sığlaşmanın ve tuzluluğun fitoplankton dağılımında ana faktör olduğu değerlendirilmiştir. Araştırma sonucunda saptanan taksonlar, fitoplanktonik organizmalar üzerine çalışmaların mevcut olamadığı K.K.T.C tatlısu alg florasi için ilk kayıtlardır.

Phytoplankton, as autotrophic organisms, play a role as primary producers and are often used to measure the fertility of a body of water. Palabuhanratu Waters, which has fishing resources, experiences various human activities in its vicinity. This study aims to determine the community structure in Palabuhanratu Waters. Phytoplankton samples were collected in October 2022 from four stations, and water parameters such as temperature, salinity, pH, and dissolved oxygen (DO) were measured. Six classes and 27 genera of phytoplankton were found, including Dinophyceae, Bacillariophyceae, Oligotrichea, Chlorophyceae, Polycystina, and Trebouxiophyceae, with Bacillariophyceae being the dominant class. The abundance of phytoplankton was relatively low, ranging from 66 to 695 ind/l. The diversity index was classified as moderate, with values ranging from 1,552 to 2,234. The water parameters indicated that the conditions still support the growth of phytoplankton. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Anatolian Environmental & Animal Science is the property of Bulent Verep and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The Yeşilırmak basin, with an area of 36.114 km², is Türkiye's fifth-greatest area for precipitation. The primary sources of pollution in the basin are population increase, unplanned urbanization, industrial and animal waste, usage of fertilizers and pesticides. In this study, five lakes with high altitude, small surface area, and deep characteristics in the Yeşilırmak Basin (Boraboy, Büyük, Dipsiz, Düden, and Zinav Lake) were assessed by using the phytoplankton indices (PTI and Q) and trophic status index (TSI). Phytoplankton and water samples were collected (April, July, and September 2018), and 85 species were identified. Total phosphorus, total nitrogen, chlorophyll a, and Secchi depth parameters were used to estimate the trophic status of the lakes. Linear regression analysis was performed separately for PTI and Q indices with total phosphorus, the limiting element in lakes. As a result, the Q index correlated with total phosphorus higher (r²=0.75) than the PTI index (p<0.05). The ecological quality statuses produced by the Q index were comparable to the TSI index. Considering the results collectively, the status of Boraboy Lake was assessed as "good/oligotrophic", Büyük Lake as "moderate/oligotrophic", Düden and Zinav Lakes as "moderate/mesotrophic", and Dipsiz Lake as "moderate/eutrophic" in terms of phytoplankton composition and trophic status. As a result, while Boraboy and Büyük Lakes' quality should be maintained, steps should be taken to improve the quality of the Dipsiz, Düden, and Zinav Lakes. [ABSTRACT FROM AUTHOR]

Phytoplankton is an autotroph organism that produces its own food through the process of photosynthesis with the help of sunlight which forms the basis of water productivity to be utilized by trophic organisms above and is used as an environmental bioindicator because it is sensitive to environmental changes. Phytoplankton live in waters, one of which is in the river ecosystem which is a flowing water with a plankton community called potamoplankton. Because of the importance of phytoplankton for life, it is necessary to conduct research on Comparison of Phytoplankton Composition and Abundance in Different Land Use in Cisadane River, Tangerang Regency. In this study, purposive sampling method was used to measure parameters such as pH, temperature, and water transparency. Identification of phytoplankton composition and abundance was carried out using the Sedgwick Rafter Counting Cell (SRCC) using the sweep method. The results of this study were obtained 23 genus of phytoplankton derived from 6 classes consisting of: Bacillaryophyceae, Cyanophyceae, Chlorophyceae, Conjugatophyceae, Trebouxiophyceae, and Zygnematophyceae. Phytoplankton abundance was 185-490 Ind/L with the highest abundance in both areas being the class Bacillariophyceae and genus Navicula. The diversity index were 1.307-2.124 and the dominance index were 0.201-0.461. Water quality parameters that affect the composition and abundance of phytoplankton are water transparency, water pH, and water temperature. The fertility level of the Cisadane River waters in terms of phytoplankton abundance has an oligotrophic fertility level. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Social & Technology / Jurnal Sosial dan Teknologi (SOSTECH) is the property of Green Publisher and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Studia Ecologiae et Bioethicae is the property of Uniwerystet Kardynala Stefana Wyznskiege w Warzawie and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Plankton are organisms that live in the ocean water column and move with the currents. The plankton is divided into two types, namely phytoplankton and zooplankton. This study aims to determine the abundance anda ecologycal index of phytoplankton and zooplankton in the waters of Seurudong Island, South Aceh district. Water sampling with a volume of 100 liters was filtered using a plankton net at each station. There are 3 sampling locations. Each station has 4x repeats. Measurement of water quality is carried out simultaneously with water sampling to identify the type of plankton. The results of this study indicate that there are differences in abundance at each station. The abundance of phytoplankton at station 1 was 12520 cells/L, Station 2 was 5643 cells/L, and Station 3 was 3510 cells/L. The abundance of zooplankton at station 1 was 918 ind/L, station 2 was 1225 ind/L and station 3 was 1575 ind/L. Based on ecologycal index, phytoplankton and zooplankton respectively showed H’ (0,97 – 1,05), C (1,0) dan E (0,26 – 0,33) while H’ (0,55 – 0,78), C (1,0) dan E (0,21 – 0,24). The composition of phytoplankton and zooplankton in these waters is closely related to availability of food sources for aquatic organisms. [ABSTRACT FROM AUTHOR]

Copyright of Erzincan University Journal of Science & Technology is the property of Erzincan Binali Yildirim Universitesi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Agriculture & Nature / Kahramanmaraş Sütçü İmam Üniversitesi Tarım & Doğa Dergisi is the property of Kahramanmaras Sutcu Imam Universitesi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Sungai Gunung Anyar Surabaya digunakan untuk pembuangan limbah rumah tangga karena terdapat pemukiman padat penduduk di sepanjang alirannya. Selain itu, terdapat tambak-tambak yang membuang sisa pakan dan sisa metabolisme ke Sungai Gunung Anyar. Limbah yang mengandung unsur hara seperti nitrat dan fosfat akan dimanfaatkan oleh fitoplankton untuk pertumbuhannya. Masuknya bahan organik nitrat dan fosfat, ke muara dapat mempengaruhi kualitas air yang berpengaruh pada keberadaan fitoplankton. Tujuan penelitian ini adalah menganalisis hubungan konsentrasi nitrat dan fosfat terhadap kelimpahan fitoplankton di Perairan Mangrove Gunung Anyar, Surabaya. Penelitian ini dilakukan pada pertengahan bulan Oktober sampai Desember 2021. Pengambilan sampel dilakukan pada sembilan stasiun dengan metode pengambilan fitoplankton secara horizontal. Analisis fitoplankton menggunakan Sedgwick Rafter Counter Cell (SRCC). Sampel air digunakan untuk menganalisis nitrat dan fosfat yang selanjutnya dianalisis menggunakan Spektrofotometri Uv-Vis. Analisa data meliputi densitas absolut fitoplankton, indeks keanekaragaman fitoplankton, serta uji regresi untuk mengetahui hubungan nitrat dan fosfat dengan fitoplankton. Konsentrasi nitrat tergolong oligotrofik sedangkan konsentrasi fosfat tergolong mesotrofik. Kelimpahan fitoplankton termasuk dalam kategori oligotrofik. Indeks keanekaragaman (H’) termasuk dalam kategori sedang. Hubungan antara nitrat terhadap kelimpahan fitoplankton menunjukkan (r) memiliki korelasi lemah, sedangkan hubungan antara fosfat terhadap kelimpahan fitoplankton menunjukkan (r) memiliki korelasi cukup.

Copyright of Journal of Agriculture & Nature / Kahramanmaraş Sütçü İmam Üniversitesi Tarım & Doğa Dergisi is the property of Kahramanmaras Sutcu Imam Universitesi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Abstrak Kajian kemelimpahan fitoplankton di perairan estuari payau Bondan Cilacap telah dipelajari. Perairan Bondan merupakan perairan hutan bakau rusak dan dikoloni oleh semak dan liana bakau, padahal daun pohon bakau adalah sumber input nutrien utama untuk komunitas fitoplankton yang merupakan mata rantai pertama dalam jejaring makanan perairan hutan bakau. Pengambilan sampel fitoplankton dilakukan dengan pencuplikan menggunakan modifikasi van Dorn 5 L dan merupakan komposit 20 L air dengan ulangan 5 kali. Kualitas perairan yang diukur meliputi kecepatan arus dan angin, suhu air dan udara, kelembaban udara, jeluk perairan dan jeluk Secchi, intensitas cahaya, turbiditas, salinitas, pH, NH4+, NO3-, PO43-, dan SO42-. Hasil menunjukkan bahwa cacah spesies dominan adalah fungsional grup diatom, akan tetapi cacah individunya sedikit. Sebaliknya, cacah individu algae koloni melimpah tetapi cacah spesiesnya sedikit, dan terjadi peledakan Aphanocapsa pulchra, 188.260 individu per 100 L. Peledakan ini karena perairan didominasi air tawar dan kerusakan hutan bakau. Peledakan A. pulchra mengindikasikan kualitas perairan hutan bakau Bondan buruk. Abstract The abundance of phytoplankton in the brackish estuary of Bondan Cilacap have been studied. Bondan waters are setting in the disturbed mangrove ecosystem, which colonized by mangrove shrubs and lianas, whereas, the mangrove leaves are the main source of nutrient input for the phytoplankton community as the first link in the mangrove aquatic food web. Phytoplankton were sampled using a 5 L modification of van Dorn and a composite of 20 L of water with 5 replications. The water qualities measured include surface current, wind speed, water and air temperatures, air humidity, Secchi depth and water depth, light intensity, turbidity, salinity, pH, NH4+, NO3-, PO43-, dan SO42-. The results showed that the number of the dominant species was diatoms, but the number of the individuals was small. In contrast, the individual number of algae colony was abundant but the species number were few, and Aphanocapsa pulchra was blooming, 188,260 individuals per 100 L. This bloom was due to the waters were dominated by freshwater and the disturbed mangrove trees. The blooming of population of A. pulchra indicated that bad waters quality.

Phytoplankton is an organism that had an effect on life waters and can be used as the parameters in monitoring water quality. Distribution of phytoplankton in the waters can be for biomonitoring which can be used to make protection zone. This study will examine the distribution and composition of phytoplankton in The crab conservation area in Betahwalang Waters, Demak. This research divided into three stations in estuaries and the sea s. Each sampling was done once a month. Samples were taken using a plankton net. The results found three classes of phytoplankton, namely Bacillariophyceae class, Cyanophyceae class and Dinophyceae class. The number of genera found in the river area (37 genera), at the estuary station as much (38 genera) and the sea station as much (31 genera). Fluctuation in phytoplankton abundance at each station is quite varied. The abundance of phytoplankton in January was 1.030.400 cells/L, in February it was 936.800 cells/L, and in March it was 643.600 cells/L. The highest abundance occurs in the estuary area, then the river and the lowest in the sea. The value of species diversity index (H ') is in the range of 2.57-3.03. Uniformity index values range from 0.86 to 0.94. The dominance index from 0.06 to 0.14. Factors affecting the abundance and dominance of phytoplankton are water conditions and the rainy season. Fitoplankton merupakan organisme yang mempunyai pengaruh besar terhadap kehidupan di suatu perairan baik langsung maupun tidak langsung dan dijadikan sebagai salah satu parameter dalam pemantauan kualitas perairan.Fitoplankton di perairan dapat dijadikan suatu ukuran bahwa Kawasan tersebut dapat dijadikan sebagai zona perlindungan biota.Penelitian ini mengkaji fluktuasi fitolankton pada Kawasan konservasi rajungan di Perairan Betahwalang, Demak. Penelitian ini dilakukan pada 3 stasiun yang terletak disungai, muara sungai, dan laut. Pengambilan sampel dilakukan setiap bulan selama tiga bulan menggunakan planktonnet. Hasil penelitian ditemukan 3 kelas yaitu kelas Bacillariophyceae, Cyanophyceae dan Dinophyceae.Jumlah genus yang ditemukan pada area sungai, muara sungai dan laut berturut-turut 37 genus, 38 genus dan 31 genus. Fluktuasi kelimpahan fitoplankton di setiap stasiun cukup bervariasi.Kelimpahan fitoplankton pada bulan Januari sebesar 1.030.400 sel/L, pada bulan Februari sebesar 936.800 sel/L, dan pada bulan Maret sebesar 643.600 sel/L. Kelimpahan tertinggi terjadi pada daerah muara, kemudian sungai dan terendah di laut. Sedangkan nilai indeks keanekaragaman jenis (H’) berada pada kisaran 2,57-3,03. Nilai indeks keseragaman berkisar 0,86-0,94. Sedangkan indeks dominasi berkisar 0,06-0,14. Faktor yang mempengaruhi kelimpahan dan dominasi fitoplankton adalah kondisi perairan dan musim hujan.

Air terjun atau curug terbentuk dari aliran air sungai pada jalur dataran tinggi yang hanya sedikit mendapat perhatian mengenai kualitas dan status nutriennya. Tujuan penelitian untuk mengetahui komposisi fitoplankton dan kualitas perairan pada curug Sawer dan Cimanaracun Taman Wisata Alam (TWA) Situ Gunung. Parameter kimia-fisik yang diamati berupa suhu, konduktivitas (EC), total padatan terlarut (TDS) dan pH. Sampel fitoplankton diambil sebanyak 4 liter air dialirkan pada jaring plankton berukuran 50 μm hingga 15 ml dan diawetkan dengan Lugol’s iodine 10%. Hasil penelitian menunjukkan terdapat 3 jenis fitoplankton dari kelas Chlorophyceae (100%) pada curug Sawer dan 4 jenis yang berasal dari kelas Chlorophyceae (76%) dan Cyanophyceae (24%) pada curug Cimanaracun. Berdasarkan nilai indeks saprobik, kedua perairan memiliki kategori tercemar sangat ringan dengan masing-masing 1,92 pada curug Sawer dan 1,53 pada curug Cimanaracun. Abstract Waterfalls are formed from river which cascade at a high elevation that had a little attention about its quality and nutrient. The aims of study determined a composition of phytoplankton and the quality of waterfalls in Situ Gunung recreational park region. Physico-chemical was observed such as temperature, electro-conductivity, total dissolved solids, and pH. Phytoplankton sample was taken 4 liters streamed to plankton-net with size 50 μm until 15 ml and preserved by Lugol’s iodine 10%. The result showed there are 3 phytoplankton species belong Chlorophyceae class (100%) in Sawer waterfall and there were 4 phytoplankton species belong Chlorophyceae (76%) and Cyanophyceae (24%) classes in Cimanaracun waterfall. Based on saprobic index value from both of them waters showed has very slight pollution with 1.92 and 1.53, respectively.

Plankton merupakan organisme kecil yang melayang di dalam badan air pada perairan dan memiliki kemampuan bergerak yang pasif. Perubahan kondisi lingkungan menentukan kehadiran komunitas plankton yang hadir. Plankton terbagi menjadi fitoplankton dan zooplankton. Fitoplankton merupakan plankton yang dapat melakukan fotosintesis. Salah daerah pesisir yang berada di Kota Langsa adalah Pulau Pusong. Penelitin ini bertujuan untuk mengetahui jenis fitoplankton apa saja yang terdapat di perairan sekitar Pulau Pusong dan kondisi lingkungan di perairan sekitar Pulau Pusong. Pencuplikan sampel plankton di perairan Pulau Pusong dilakukan sebanyak empat titik sampling. Pengukuran sampel air dilakukan dengan tiga ulangan. Ada 30 jenis fitoplankton yang diperoleh yang terdiri dari genus yaitu Bacillaria, Bacteriastrum, Biddulphia, Ceratium, Chaetoceros, Coscinusdiscus, Dactyliosolen, Dithylum, Eucampia, Leucosolonia, Merismopedia, Navicula, Nitzschia, Odentella, Planktonella, Pseudo-nitzschia, Pyrocystis, Rhizosolenia, dan Thalassionema.

kan Cupang Betta splendens adalah salah satu jenis ikan hias peliharaan yang mempunyai daya tarik pada warna yang dimunculkan dari tubuhnya. Ikan cupang memiliki nilai ekspor US$ 4,911. Kualitas warna ikan hias menentukan nilai ekonomis, tampilan warna yang indah merupakan salah satu indikator yang menjadi daya tarik. Salah satu usaha yang dilakukan untuk mendapatkan warna cerah yang merata pada ikan adalah dengan teknik manipulasi pigmen ke dalam pakan. Mikroalga Porphyridium cruentum merupakan mikroalga merah yang memiliki manfaat yang digunakan sebagai sumber pigmen alami. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan P. cruentum pada pakan terhadap kecerahan warna, dan kelulushidupan ikan cupang. Metode penelitian ini menggunakan rancangan Acak Lengkap (RAL) dan perlakuan yang dilakukan dalam penelitian ini menggunakan perbedaan dosis P. cruentum yang berbeda yaitu menggunakan P0 sebagai kontrol dengan pemberian cacing darah, P1 dengan dosis P. cruentum 0%,P2 dosis P. cruentum 1%, P3 dosis P. cruentum 3%, P4 dosis P. cruentum 5%. Kemudian dilakukan ulangan 4 kali. Hasil penelitian ini menunjukkan bahwa penambahan P. cruentum berpengaruh terhadap perubahan kecerahan warna ikan cupang. Perubahan kecerahan warna ikan cupang dilihat dari perubahan nilai hue (o). Penambahan P. cruentum tidak berpengaruh terhadap kelulushidupan. Penambahan dosis 1% P. cruentum pada pakan menghasilkan kecerahan warna terbaik selama empat minggu yaitu 8.50, 15.50, 21.00, dan 27.50 sedangkan dosis 0% menghasilkan kecerahan warna terendah yaitu 0.00. Nilai kelulushidupan selama penelitian pada tiap perlakukan tidak berbeda nyata yaitu 100%.

In the present study, phytoplankton composition in relation to mucilage and accompanied physicochemical conditions were investigated in the sea water samples collected from four stations in İzmit-Kocaeli, Fatih-İstanbul, Biga-Çanakkale (in the Marmara Sea), and Rivaİstanbul (in the Black Sea). Samplings were carried out before (i.e., during September 2020) and at the beginning stage of the mucilage formations (i.e., during April 2021) which was observed in the Marmara Sea during spring and summer months of 2021. Seawater temperature, salinity, pH, and dissolved oxygen levels were measured in situ. Inorganic nitrogen, orthophosphate, and chlorophyll-a concentrations were analyzed spectrophotometrically. In total 83 phytoplankton species (44 Bacillariophyceae-BAC, 36 Dinophyceae-DIN, 2 Dictyochophyceae-DIC, and 1 Chlorophyceae-CHL) were identified during the study. BAC species were generally dominant. Among the 83 phytoplankton taxa identified, Cerataulina pelagica, Cylindrotheca closterium, Pseudo-nitzschia sp., Skeletonema costatum, Thalassiosira rotula, Alexandrium tamarense, Dinophysis acuminata, Dinophysis caudata, Dinophysis fortii, Gonyaulax fragilis, Gonyaulax spinifera, Gymnodinium sp., Gyrodinium sp., and Prorocentrum micans are known as the species associated with mucilage formation. The highest number of species was determined at the Biga-Çanakkale station (MDG25) with 38 taxa in September 2020. [ABSTRACT FROM AUTHOR]

Copyright of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Ürünleri Dergisi is the property of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Urunleri Dergisi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Şubat 2015-Ocak 2016 tarihleri arasında aylık olarak Munzur Çayı’nda belirlenen iki istasyonda gerçekleştirilen çalışmada fitoplankton dağılımı ile fiziko-kimyasal parametreler belirlenmeye çalışılmıştır. Yerüstü Su Kalitesi Yönetmeliği’ne göre suyun kalitesi, sıcaklık, pH, oksijen, amonyum nitrat I. Sınıf özelliği; nitrit ise II. Sınıf özelliği niteliğinde değerlendirilmiştir. Ayrıca II. İstasyon evsel atık sebebiyle organik kirlenme tehdidi altında olduğu belirlenmiş ve bu duruma markerleri olarak bölgedeki fitoplankton dağılımı incelenmiştir. Elde edilen sonuçlar göstermiştir ki: Munzur Çayı’nda Chlorophyta (6), Bacillariophyta (54), Cyanobacteria (15), Rhodophyta (1), Ochrophyta (1), Euglenophyta (2), Charophyta (3), Miozoa (2) sınıflarına ait toplam 84 takson tespit edilmiştir. Fitoplanktonda organizma sayısı bakımından iki istasyon içinde Bacillariophyta divizyosunun dominant, Cyanobacteria ise subdominant olduğu gözlenmiştir. Fitoplanktonda Bacillariophyta’dan Ulnaria ulna, Nitzschia palea, Bacillaria paradoxa ,Encyonema sp., Navicula sp. ve Nitzschia acicularis türlerinin çoğunlukla bulunduğu; Cyanobacteria üyelerinden Lyngbya sp., Spirulina labyrinthiformis, Oscillatoria labyrinthiformis ve Oscillatoria mougeotii türlerinin ise önem açısından ikinci sırada yer aldığı raporlanmıştır. Chlorophyta, Charophyta ve Euglenophyta türleri ise önemli sayılara ulaşamamışlardır.

Eutrophication is a regularly faced problem by reservoirs in Indonesia. However, this problem can be solved by technical measures including the conceptual model and numerical solution. In the context of such,objective of this paper had focused on the numerical simulation of reservoir water quality dynamics in controlling eutrophication. The water quality parameters simulated include the parameters as prime causeof eutrophication such as total Nitrogen dan total Phosphorus, whereas eutrophication is indicated by thephytoplankton concentration and chlorophil-a. Dynamic simulation is needed to know the affect of pollutantloading variations to eutrophication dynamics. This study concentrated on the Jatiluhur Reservoir mainly onits morphometry and water quality parameters. Softwares used for this study include the Powersim Constructor and WASP (Water Quality Analysis Simulation Program). Simulation results show that to remedy the eutrophicated Jatiluhur reservoir, an integrated method, that is, reduction of internal and externalloading mainly on Total Nitrogen dan Total Phosphorus loadings can be applied. Internal loading needs 50% nutrient loading reduction, while nutrients from external loading require at least 90% reduction.

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This study aims to determine to determine the species composition, abundance and community structure of phytoplankton in shellfish aquaculture ponds blood (Anadara granosa) in Menco, District Wedung, District Demak.Metode used in this study is Diskriptif method, determination of the location of the study is purposive sampling Methods, namely the determination of the sampling locations should be based on consideration, the station I to III of the sampling stations representing keseluruan research area. Marine research station is Blood Shellfish Farming in Hamlet Menco. Station is divided into three stations, with making four periods. Environmental parameters taken include: salinity, temperature, pH, DO, nitrate, phosphate, dissolved oxygen, organic materials. The results of the study, found 19 genera of phytoplankton. Phytoplankton abundance 2596-18844 cells / L. Diversity index (H ') based on the total period ranged from 1.098 to 1.837. On January 18-March 3, 2014, categorized into the diversity index medium. Uniformity index (e) the entire period ranged from 0.616 to 0.999. Fitoplankton atau mikroalga merupakan makanan utama kerang di tambak. Penelitian ini bertujuan untuk mengetahui komposisi jenis, kelimpahan, dan struktur komunitas fitoplankton pada tambak budidaya kerang darah (Anadara granosa) di Menco, Kecamatan Wedung, Kabupaten Demak. M etode yang digunakan dalam penelitian ini adalah metode Deskriptif. Sampel fitoplankton diambil dari Tambak Kerang Darah selama empat periode. Parameter lingkungan sebagai data penunjang adalah salinitas, suhu, pH, DO, nitrat, fosfat, oksigen terlarut, bahan organik. Hasil penelitian menjunjukkan terdapat 19 genus fitoplankton, dengan kelimpahan 2.5-18.8x103sel.L-1. Indeks keanekaragaman (H’) berdasarkan total keseluruhan periode berkisar antara 1,098-1,837. Pada tanggal 18 Januari-3 Maret 2014, dikategorikan masuk dalam indeks keanekaragaman sedang. Indeks keseragaman (e) keseluruhan periode berkisar antara 0,616–0,999.

Telah dilakukan penelitian tentang analisis kelimpahan fitoplankton penyebab HAB (Harmful Algal Bloom) di Perairan Teluk Lampung pada musim barat dan musim timur. Penelitian ini bertujuan untuk mengidentifikasi alga yang berpotensi menyebabkan HAB yang berada di Teluk Lampung dan melihat pola hubungan kelimpahan fitoplankton yang bepotensi menyebabkan HAB dengan nutrien yang terkandung di perairan Teluk Lampung, Kab. Pesawaran, Provinsi Lampung. Pengambilan sampel dilakukan pada musim timur (April) dan musim barat (Oktober) pada tahun 2015. Dari penelitian ini ditemukan bahwa pada musim timur fitoplankton yang teridentifikasi dan berpotensi menyebabkan HAB adalah Amphora sp., Nitzchia sp., Ceratium sp., Dynophisis sp., Gymnodinium sp., dan Nocticulla scintillans. Pada musim barat fitoplankon yang teridentifikasi dan berpotensi menyebabkan HAB adalah Amphora sp., Nitzchia sp., Pseudonitzchia sp., Alexadrium sp., Ceratium sp ., Cochlodium polykiroides, Dhynophisis sp ., Gambirdiscus toxicus, Gymnodinium sp., Nocticula scintillans, Procentrum sp., Pyrodinium bahamase dan Peridinium sp. Pada musim timur kelimpahan fitoplankton penyebab HAB yang terdapat di perairan Teluk Lampung didominasi oleh spesies Ceratium sp. dengan rata-rata 1,802 ind/L sedangkan pada musim barat kelimpahan fitoplankton di Teluk Lampung didominasi oleh Nitczchia sp ., dengan rata-rata kelimpahan 161,207ind/L.

Abstrak Indeks saprobik merupakan indeks yang digunakan untuk mengetahui status pencemaran pada perairan dengan menggunakan keberadaan organisme seperti komposisi fitoplankton di perairan. Tujuan penelitian untuk mengetahui keanekaragaman fitoplankton dan kondisi kualitas perairan danau Situ Gunung, Sukabumi Jawa Barat berdasarkan nilai indeks saprobik. Sampel fitoplankton diambil dengan cara menyaring air danau sebanyak 20 liter dengan plankton net kemudian diawetkan dengan larutan Iodine 10%. Hasil penelitian menunjukkan terdapat 32 spesies fitoplankton ditemukan di Situ Gunung yang termasuk ke dalam 5 kelas yaitu, Chlorophyceae (66,58%), Cyanophyceae (25,82%), Bacillariophyceae (6,33%), Dinophyceae (1,01%) dan Cryptophyceae (0,25%). Jenis fitoplankon yang paling banyak ditemukan di Situ Gunung adalah Monoraphidium sp., Chroococcus sp., Gloeocapsa sp., dan Ankistrodesmus sp. Nilai indeks keanekaragaman (H’) di stasiun A = 1,02), stasiun B = 0,78, stasiun C = 0,39, stasiun D = 0,83 dan stasiun E = 0,6. Nilai indeks saprobik berkisar antara 1 s.d 1,67, yaitu dengan tingkat pencemaran ringan (β mesosaprobik) hingga sangat ringan (oligosaprobik) oleh bahan organik. Berdasarkan hasil tersebut, danau Situ Gunung termasuk ke dalam perairan yang belum tercemar. Abstract The saprobic index is an index applies to determine pollution level of water based on the presence of organisms such as phytoplankton. This study was conducted to determine the diversity of phytoplankton and water quality of Situ Gunung, Sukabumi, West Java based on saprobic index values. From this study, 32 species of phytoplankton were found that were members of five major classes: Chlorophyceae (66.58%), Cyanophyceae (25.82%), Bacillariophyceae (6.33%), Dinophyceae (1.01%) and Cryptophyceae (0.25%). The most abundant phytoplankton species found in Situ Gunung were Monoraphidium sp., Chroococcus sp., Gloeocapsa sp., and Ankistrodesmus sp. Diversity index (H') of station A, B, C, D, and E were 1.02, 0.78, 0.39, 0.83, and 0.6, respectively while saprobic index values ranged from 1 to 1.67, with the level of organic contamination ranging from light (β mesosaprobic) to very light (oligo saprobic). Based on these results, it is concluded that Situ Gunung has not been contaminated by pollutants.

This research was carried out between August 2016 and September 2016 in 3 glacial lakes located in Tortum/Erzurum. These lakes are covered with ice for about 8-10 months depend on seasons. Throughout the research, phytoplankton specimens were collected with plankton nets (50µ mesh size). Water samples were taken by samples from each lake. In this study, a total of 57 species was identified. From Bacillariophyta 39, Chlorophyta 9, Cryptophyta 2, Cyanobacteria 2, Charophyta 3, Euglenophyta 1 and Ochrophyta 1 species were identified. The lowest and highest values of the dissolved oxygen 5.96-9.56 mgl-1, the pH 7.93-8.5, the water temperature 6.5-19.5 °C, the conductivity 0.030-0.037 mScm-1 were measured. [ABSTRACT FROM AUTHOR]

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This study was performed from March 2004 to February 2005 in 4 stations in Gala Lake, a shallow lake located inside Gala Lake National Park in Meriç Delta. Water samples were taken from the lake in order to determine the phytoplankton present in the lake and to perform physicochemical analysis. A total of 112 taxa from 5 divisio were identified during the study period. Chlorophyta was the most diversed group in the lake with 47 taxa and diatoms were found to have the highest cell counts with a mean value of 670011 cell L-1. The general pattern of seasonal succession in phytoplankton of the lake was represented with Chlorophyta in June and with Cyanophyta in September and Diatoms were the dominant group of the lake in all other months. A spatial heterogeneity was observed in the lake where a slight Microsystis spp. increase occurred in early autumn months. Comparison with former phytoplankton data showed distinct differences in terms of the qualitative and quantitative composition of the phytoplankton community of Lake Gala, which indicates lake deterioration.

This study was carried out between June 2011 and May 2012 at different depths of three stations in Kadıköy Dam Lake in the Turkish Thrace. A total of seventyfour phytoplanktonic algal taxa belonging to Chlorophyta, Ochrophyta (Diatoms), Cyanobacteria, Euglenophyta, Charophyta, and Dinophyta were recorded during the study period. Members of Chlorophyta were found to constitute the dominant group in the lake. Some physical and chemical water quality parameters and trophic state of lake water were determined.

Penelitian ini bertujuan mendeskripsikan dinamika struktur komunitas dan biomassa fitoplankton berdasarkan stratifikasi kedalaman di Perairan Danau Laut Tawar. Sampling dilakukan pada empat stasiun dengan masing-masing empat kedalaman, yaitu 0,2 m, 3 m, 10 m, dan 15 m. Pengambilan sampling air dilakukan sebanyak 4 kali dengan interval waktu 14 hari, yaitu selama bulan Maret sampai April 2010. Fitoplankton yang tersaring diamati dibawah mikroskop cahaya. Hasil penelitian mendapati sebanyak 43 jenis fitoplankton yang terbagi kedalam lima kelas, dimana klas yang paling dominan adalah kelas Chlorophyceae (20 genera), diikuti oleh Bacillariophyceae (diatom) sebanyak 9 genera, Cyanophyceae sebanyak 10 genera, kelas Dinophyceae (dinoflagellata) dan Euglenophyceae, masing-masing 2 genera. Komposisi jenis fitoplankton tertinggi terdapat pada stasiun II dengan kedalaman 15 m yaitu sebanyak 24 genera. Kelimpahan fitoplankton tertinggi diperoleh pada stasiun I dengan kedalaman 10 m (38900 sel/l), sedangkan kelimpahan terendah diperoleh pada stasiun III di kedalaman 15 m (3355 sel/l). Kelimpahan fitoplankton secara keseluruhan di dominasi oleh kelas Bacillarophyceae. Selain itu, nilai indeks keanekaragaman fitoplankton menunjukkan keanekaragaman yang relatif sedang 2,34. Nilai indeks keseragaman jenisnya bervariasi dan relatif sedang berkisar antara 0,43 - 0,87, ini menunjukkan bahwa penyebaran jumlah individu tiap jenis juga bervariasi namun tidak ada jenis yang mendominansi.

A strong socio-economic development pressure in South Chile will more and more cause an impact to the present lakes and rivers. Nevertheless, our knowledge concerning the ecological structure and the microbial self-purification capabilities of these lacustrine water bodies is scant but essential for a future sustainable development of land and water use. We studied Lake Laja, a lake already heavily impacted by water diversions for hydropower generation and irrigation. Typical for the Andean region Lake Laja is an oligotrophic water body, limited by nitrogen nutrients. Only very low chlorophyll a and particulate organic carbon (POC) concentrations and a small abundance and biomass of bacteria (mainly ultramicrobacteria) and heterotrophic flagellates were encountered. Weak trophic interrelations were derived from a high bacteria-to-heterotrophic flagellate ratio. For the ten investigated extracellular enzymes (alkaline phosphatase, leucine, arginine-, glycine and tyrosine-aminopeptidase, α-, β-D-glucosidase, α-, β-D-galactosidase, N-acetyl-β-D-glucosaminidase), with the exception of α-D-glucosidase, a broad range of organic matter degradation activities was proven. Probably, due to the N-limitation, organic nitrogen hydrolysing extracellular enzymes reached activities on average of 45 % compared to other studies in oligotrophic waters. The possible effect of N-limitation on extracellular enzyme activities was more pronounced by cell specific extracellular enzymatic activity rates, which exceeded those of other oligotrophic water bodies on average by factor 2. The overall activities of all microbial extracellular enzymes studied proved to be dominated by the dissolved free external enzymes (up to 98 %) over the ectoenzymes which are associated with particulate organic matter (bacterial cell walls, particles, and aggregates). It is concluded that future socio-economic changes, dealing with watershed human intervention (accelerating inorganic and organic loads) as well as global change (temperature and precipitation changes) could lead to significant changes in the ecology of Lake Laja.La gran presión generada por el desarrollo socioeconómico del sur de Chile, está causando cada vez más un mayor impacto en los lagos y ríos allí presentes. Sin embargo, el conocimiento de la estructura ecológica y la capacidad microbiana de autodepuración de los cuerpos de agua lacustres es escasa, pero esencial para un futuro uso sostenible de los recursos agua y suelo. Se estudió el lago Laja, por ser un cuerpo de agua muy afectado por la extracción de agua para la generación de energía hidroeléctrica y el riego. Como es característico de la región andina, el lago Laja es oligotrófico limitado por nutrientes nitrogenados. Se encontraron bajas concentraciones de clorofila a y carbono orgánico particulado (POC), así como bajas abundancias y biomasa de bacterias (principalmente ultramicrobacteria) y de flagelados heterotróficos. Interrelaciones tróficas débiles se determinaron de la relación bacterias y flagelados heterotróficos. Para las diez enzimas extracelulares estudiadas (fosfatasa, leucina-, arginina-, glicina- y tirosina-aminopeptidasa, a-, b-D-glucosidasa, a-, b-D-galactosidasa, N-acetyl-b-D-glucosaminidasa), con la excepción de α-β-glucosidase, se analizó un amplio rango de actividad de degradación sobre la materia orgánica. Probablemente, debido a la limitación de nitrógeno, el N-orgánico hidrolizado por enzimas extracelulares alcanzó una actividad promedio de 45 %, comparada con otros estudios en aguas oligotróficas. El posible efecto de la limitación de N en la actividad enzimática extracelular, fue más pronunciado en las tasas de la actividad enzimática extracelular específicas, las cuales excedieron en un factor promedio de dos a las de otros cuerpos de aguas oligotróficos. En general, la actividad de todas las enzimas extracelulares microbianas estudiadas resultaron estar dominadas por enzimas externas disueltas libres (hasta el 98 %), más que por ectoenzimas asociadas a partículas de materia orgánica (paredes celulares de bacterias, partículas y agregados). De esta manera es posible concluir que los futuros cambios socioeconómicos, reflejados en el incremento de cargas orgánicas e inorgánicas, así como el efecto del cambio global (cambios en temperaturas y precipitaciones), podrían provocar cambios significativos en la ecología del lago Laja.

Bu çalışmada rekreaktif amaçlı kullanılan Sarısu Göleti’nin mevcut besin düzeyinin belirlenmesi amacı ile bazı su kalite parametreleri, klorofil a, fitoplankton kompozisyonu ve sayısı ile zooplankton bolluğu altı ay boyunca incelenmiştir. Su kalite parametrelerine göre gölün besin düzeyi mezoötrofik-ötrofik olarak belirlenmiştir. Söz konusu parametreler Türk Çevre Mevzuatı’na göre tartışılmıştır. Araştırma süresince Bacillariophyceae, Chlorophyceae, Chrysophyceae, Cryptophyceae, Cyanophyceae ve Dinophyceae sınıflarından toplam 31 fitoplankton türü teşhis edilmiştir. Fitoplankton sayısı 495000 hücre/l ile 12808000 hücre/l, klorofil a derişimi ise 1,12 ile 13,2 mg/m3 arasında değişmiştir. Gölette zooplankton kompozisyonu içinde Rotifera baskın olmuştur. Sonuçlar, gölette hızlı bir ötrofikasyonu işaret etmiştir ve bu nedenle besin maddesi artışı kontrol edilmelidir