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"In aquatic ecosystems, light and nutrients in water column are the primary factors governing the planktonic primary productivity....."

"Penelitian hubungan kuantitatif antara fitoplankton dan zooplankton herbivor di Teluk Jakarta telah dilakukan pada Agustus dan September 2009. Sampel pada 10 stasiun diambil secara horizontal menggunakan jaring Kitahara untuk sampel fitoplankton dan jaring NORPAC untuk zooplankton. Tabulasi data disajikan dalam bentuk tabel dan grafik serta dianalisis secara deskriptif. Kelimpahan kelompok Diatom, Dinoflagellata, dan Cyanophyta memiliki korelasi negatif terhadap kelimpahan zooplankton herbivor pada bulan Agustus 2009. Kelimpahan zooplankton herbivor dapat dijelaskan sebesar 23,4% dengan persamaan regresi linear yang terbentuk pada bulan Agustus 2009. Kelimpahan kelompok Diatom, Dinoflagellata, dan Cyanophyta memiliki korelasi positif terhadap kelimpahan zooplankton herbivor pada bulan September 2009. Kelimpahan zooplankton herbivor dapat dijelaskan sebesar 88,8% dengan persamaan regresi linear yang terbentuk pada bulan September 2009.

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Research on quantitative relationship between phytoplankton and herbivore zooplankton in Jakarta Bay was conducted on August and September 2009. Sample at 10 stations was taken horizontally by Kitahara net for phytoplankton and NORPAC net for zooplankton. The data tabulation are showed in tables and graphs and also analyzed descriptively. Abundance of Diatom, Dinoflagellate, and Cyanophyta have negative correlation for herbivore zooplanktons on August 2009. Abundace of herbivor zooplankton can explain 23,4% by regression linearity on August 2009. Abundance of Diatom, Dinoflagellat, and Cyanophyta have positive correlation for herbivore zooplanktons on September 2009. Abundace of herbivor zooplankton can explain 88,8% by regression linearity on September 2009."

"Perairan Estuari mempunyai peranan penting dalam mengontrol fluks CO2 udara laut karena perairan estuari memiliki laju produksi primer yang tinggi. Penelitian di perairan Estuari Donan untuk mengkaji fluks CO2 dan hubungannya dengan laju produktivitas primer fitoplankton telah dilakukan pada bulan Juni 2010. fluks CO2 atau pertukaran aliran gas CO2 antara udara dan laut merupakan fungsi dari perbedaan konsentrasi CO2 antara udara dan laut, koefisien daya larut dan kecepatan transfer gas CO2 di permukaan laut. Tekanan parsial CO2 (pCO2) dihitung dengan menggunakan model OCMIP, sedangkan produktivitas primer diukur dengan menggunakan metode oksigen dengan titrasi Winkler. Dalam studi ini laju produktivitas primer kotor (laju fotosintesis) berkorelasi negatif dengan tekanan parsial CO2 (pCO2) sehingga dengan meningkatnya laju fotosintesis menyebabkan turunnya tekanan parsial CO2 (pCO2) dalam kolom air. "

"Telah dilakukan pencacahan secara kualitatif dengan metode subsampel terhadap sampel fitoplankton dan zooplankton yang berasal perairan Teluk Jakarta, Sungai Ciliwung, dan Situ Cikaret. Sampel plankton dicuplik dari stasiun yang telah ditetapkan di masing-masing tipe perairan pada bulan Agustus dan Oktober 1998. Untuk mengetahui hubungan kuantitatif antara fitoplankton dengan zooplankton dilakukan uji korelasi Spearman. Hasil analisis menunjukkan bahwa hubungan antara fitoplankton dan zooplankton di perairan Teluk Jakarta dan Situ Cikaret pada bulan Oktober bersifat positip. Korelasi negatip ditunjukkan oleh hubungan antara fitoplankton dan zooplankton di Sungai Ciliwung dan Situ Cikaret pada bulan Agustus. Hubungan negatip antara fitoplankton dan zooplankton di Situ Cikaret disebabkan oleh tingkat pemakanan fitoplankton oleh zooplankton. Alasan ini tidak berlaku untuk hubungan yang sama di Sungai Ciliwung. Secara keseluruhan, hubungan antara fitoplankton dan zooplankton yang terjadi di tiga tipe perairan tersebut di atas tidak dapat diterangkan oleh ketiga teori hubungan fitoplankton dan zooplankton yang ada. Perbedaan kimia fisik perairan dan komposisi struktur komunitas plankton diduga sebagai salah satu penyebab tidak selarasnya hubungan antara fitoplankton dan zooplankton dari ketiga tipe perairan dengan teori yang ada. Hasil pencacahan menunjukkan bahwa kepadatan plankton (dalam log 10) di tiga tipe perairan sangat fluktuatif berkisar antara 4,1541 - 7,7962 untuk fitoplankton di perairan Teluk Jakarta dan 0 - 6,2286 untuk zooplankton di Sungai Ciliwung. Kelompok fitoplankon yang dominan adalah Bascillariophyta di perairan Teluk Jakarta dan Sungai Ciliwung, sedangkan di Situ Cikaret adalah Cyanophyta. Untuk zooplankton Copepoda merupakan kelompok dominan di perairan Teluk Jakarta, sedangkan di Sungai Ciliwung dan Situ Cikaret didominasi oleh kelompok Rotifera."

"The aims of the study were a ) to determine the affect of offshore distant to the density and diversity of phytoplankton b) to determine the distribution pattern of density and diversity of phytoplankton...."

"Hurun Gulf waters including Fisheries Management Area (WPP) and the Java Sea in the area of Lampung Bay waters. Hurun Bay around many ponds, sights, and karamba Floating Net, so the activities carried out at sea and on land can have a negative effect on this region, especially the quality of aquatic environment. Therefore, to study the depth of the plankton community structure that can be used as the basis of information in monitoring the condition of the waters. This research was conducted during two weeks in January, February, and March. Defined 15 stations taking measurements and water and plankton samples, with two replications, from each station. Determination of the station based on the condition of the area. Sampling for phytoplankton taken with a Kitahara net cone with diameter 31 cm, length 100 cm and eye net size for surface and vertical net 80 m. Zooplankton sampling with a NORPAC net with diameter 45 cm, 180 cm length and eye net size for surface and vertical net 300 m. These samples were preserved with formalin 4 then analyzed in the laboratory using the method of sub-samples. Plankton was observed and analyzed using a microscope binoculars. The instrument used for measuring chemical and physical parameters are thermometer, refraktometer, Secchi disc, and bathymetrimeter. Vehicle used was 40 HP fishing boat. Phytoplankton species identification results of the surface are 50 genera, including in the class 3 or Diatoms Bacillariophyceae (36 genera), Cyanophyceae (3 genera) and Dinophyceae (11 genera) and the vertical is 56 genera which are 36 genera composition classes Bacillariophyceae, 4 genus 16 genus of Cyanophyceae and Dinophyceae. The dominant genus of the class is Bacillariophyceae Chaetoceros, Thalassiosira, Thalassionema and Biddulphia and three genera of the class Dinophyceae is Ceratium, Noctiluca and Protoperidinium. Diversity index values range in the surface 1.50 (Station 15) - 0.59 (Station 10), while the vertical 1.79 (Station 9) - 0.78 (Station 15). The range of values of surface uniformity index 0.47 (Station 15) - 0.17 (Station 10), whereas the vertical range of values uniformity index 0.64 (Station 9) - 0.16 (Station 15). Dominance is the highest index of 0.83 indicates that dominance is. Total abundance of phytoplankton ranged from the lowest 750 cells / l until the highest 192750 cells / l. The dominant zooplankton obtained from the class Crustacea, which is taking 24 genera in the genus 19 surface and vertically, Protozoa class (on the surface of genus 17 and 18 are vertical), Annelida (on the surface of genus 7 and 6 are vertical), Protochordata (there are two genus on the surface or vertical), molluscs (two genera), and Rotifera Echinodermata one genus. Diversity index values range in the Surface, 2.27 (Station 4) - 0.64 (Station 3) and the Vertical 2.33 (Station 1) -0.82 (Station 15). The range of surface uniformity index value, 0.99 (Station 2) -0.42 (Stasiun12), whereas the vertical range of values uniformity index 0.95 (Station 4) -0.54 (Station 14). Dominance is the highest index of 0.66, indicating that dominance was.The lowest surface abundance of 6750 ind / l (Station 14), the highest 144000 ind / l (Station 3). Phytoplankton relationships with environmental factors, phytoplankton abundance parameters are influenced by phosphate and brightness, but the most affecting is phosphate, when viewed between phytoplankton abundance parameters week has a close affinity with salinity, DO, depth and pH. Zooplankton relationships with environmental factors seen in between stations have a close connection with the phosphate and brightness, and when viewed from the inter-week zooplankton abundance parameter has a close affinity with salinity, DO, phosphate and pH. Relationships of phytoplankton-zooplankton abundance correlated positively linear in time corresponding to the regression equation Y = 0,502X – 8226. The results showed that herbivorous zooplankton feed speed is proportional to the speed increase phytoplankton populations."

"ABSTRAKUntuk mengetahui pengaruh kondisi lingkungan terhadap struktur komunitas fitoplankton pada musim kemarau di perairan Teluk Ambon telah dilakukan sampling harian selama 30 had dan bulan Januari-Februari 1996 dengan waktu yang tetap, yaitu antara 08.00-10.00 WIT di tiga titik stasiun pengamatan. Parameter lingkungan yang diamati adalah kandungan klorofil-a, suhu perairan, salinitas, fosfat, nitrat, nitrit, oksigen, pH dan turbiditas. Sampling pertama ini diambil pada kedalaman 5 m. Sampling kedua di lima titik pengamatan di perairan Teluk Ambon Dalam, sebanyak empat kali pengamatan dari permukaan sampai kedalaman 20 m.Analisis data menggunakan statistik multivariabel, yaitu berdasarkan analisis komponen utama (Principal Component Analysis) dan analisis faktorial koresponden (Correspondent Analysis). Data sekunder diperoleh dari Badan Meteorologi dan Geofisika, a.l. curah hujan dan prosentase intensitas penyinaran matahari.Pada saat pengamatan, faktor lingkungan yang sangat mempengaruhi struktur komunitas fitoplankton di perairan Teluk Ambon adalah curah hujan. Fitoplankton yang mendominasi adalah dari kelompok diatom marga Chaetoceros. Struktur komunitas fitoplankton baik sebaran secara mendatar (horizontal distribution) dan sebaran tegak (vertical distribution) mempunyai keanekaragaman yang tinggi akibat dinamisnya pergerakan massa air karena pengaruh pasang-surut harian dari Laut Banda. Perairan Teluk Ambon Dalam sangat peka terhadap pengaruh sedimentasi dan pencemaran, untuk itu diperlukan suatu pencegahan pembuangan limbah dan pembukaan lahan secara rasional.

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ABSTRACT

Ambon Bay is located in the Island of Ambon in the Molluccas. The Bay has a unique oceanographic environment. It has a shallow nentic inner bay (IAB) and a deep oceanic outer bay (0AB), which is strongly influenced by the Banda Sea. The OAB and The lAB are separated by a narrow sill of 15 m depth.

Multivariate Analysis of Community Structure of Phytoplankton And Related Environmental Factors in Ambon Bay. Daily sampling of phytoplankton and enviromental data were carried out at three stations from January to February 1996, between 08.00 to 10.00 p.m., at 5 m depth. The environmental parameters were observed, such as temperature, salinity, phosphate, nitrate, nitrite, dissolved oxygen, pH and turbidity. In dry season, the community structure of phytoplankton in the Ambon Bay water was dominated by diatoms, such as the genera of Chaetoceros, Nifszchia, Rhisozolenia and Bacteriastrum. The abundance of phytoplankton ranged from 1.0 x 102 to 61.350 x 103 cell L-'. Daily fluctuations of phytoplankton diversities were high and diversities among stations were significantly different (p<0.05).

Hydrological conditions in The Ambon Bay were varied. Water temperature ranged from 27.60 to 30.50 °C, salinity ranged from 30 to 32 %, dissolved oxygen ranged from 4.28 to 4.37 ml concentration of phosphate ranged from 0.5 to 1.0 µg at. P04 ?P concentration of nitrate ranged from 0.1 to 1.5 µg at. N03-N L', concentration of nitrite ranged from 0.1 to 0.7 µg at. N02 -N L'', and pH ranged from 6.2 to 7.2. The highest rain fall was recorded at first observation (43.1 mm). The percentage of sun shine ranged from 8 to 100 %. The turbidities ranged from 0.12 to 1.98 NTU. Multivariate analysis shows that rain, turbidity and temperature influenced the community structure of phytoplankton.

Spatial Distribution of Chlorophyll-a And Community Structure of Phytoplankton in Inner Ambon Bay. Weekly sampling of phytoplankton and chlorophyll-a were carried out from January to February 1996, from the surface, 5, 10, 15 and 20 m depth at five stations. The abundance of phytoplankton from the surface to 20 m depth, ranged from 4.5 x 102 to 40.140 x 103 cell Six species of phytoplankton were identified, namely Chaetoceros diversum, Dytilum sot, Liptocylidricus danicus, Nitszchia pacifrca, Plantoniella so! and Noctiluca scinti/ans. Vertical distribution of phytoplankton diversities were heterogeneous. Concentration of chlorophyll-a from the surface to subsurface ranged from 0.196 to 5.044 mg m'. It seems that vertical distribution of chlorophyll-a did not correspond with the abundance of phytoplankton. The abundance of phytoplankton in the Inner Ambon Bay was strongly influenced by the daily tide."

"Fenomena Harmful Algal Blooms (HABs) di Teluk Lampung, khususnya di Teluk Hurun, telah banyak dibahas oleh beberapa peneliti. Fenomena HABs diduga akibat peningkatan unsur hara (N dan P) dari limbah pertambakan, pembenihan (hatchery) dan budidaya ikan dalam karamba jaring apung. Masukan N dan P ke perairan akan menyebabkan eutrofikasi perairan yang selanjutnya dapat memicu terjadinya ledakan populasi fitoplankton yang dapat berbahaya bagi organisme perairan. Penelitian ini bertujuan menganalisis hubungan kadar nutrient N dan P dengan kemunculan fitoplankton berbahaya, akibat limbah budidaya perikanan yang berbeda pada lokasi penelitian. Secara deskristif hubungan unsur hara N dan P terhadap kelimpahan fitoplankton dapat dilihat dengan adanya kecenderungan peningkatan unsur hara tertentu yang diikuti oleh peningkatan kelimpahan total fitoplankton atau kelimpahan salah satu jenis fitoplankton. Beberapa fitoplankton berbahaya yang ditemukan dengan kelimpahan tinggi pada penelitian ini adalah Ceratium furca dengan kepadatan tertinggi mencapai 5.314 x 10 sel/l, Trichodesmium erithraeum dengan kelimpahan mencapai 1.05 x 10 sel/l and Noctiluca scintilans dengan kelimpahan mencapai 5.99 x 10 sel/l. Hubungan unsur hara N dan P dengan HABs juga ditunjukkan dengan analisis regresi berganda dan canonical corelation analysis (CCA) yang menunjukkan adanya korelasi positif yang kuat antara konsentrasi unsur hara N dan P dengan potensi kemunculan HABs pada berbagai lokasi budidaya perikanan di Teluk Lampung.

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The phenomenon of harmful algal blooms (HABs) in the Lampung Bay has been reported by many researchers. The occurrence of HABs may be due to the increase of nutrient (N and P) as results of waste water of aquaculture (shrimp farms, hatcheries and fish cage farms). This study aim to determine the relationship between N and P concentrations in some aquaculture sites with harmful algal blooms. The analysis revealed the differences concentration of N and P at each different shrimp farms and fish cage farms sites (Hurun, Sidodadi, Ringgung, and Cikunyinyi Bay). The result showed that the increase of N and P concentration were followed by the increase of harmful phytoplankton populations. High density HABs were found in this study, such as: Ceratium furca with the highest density at 5.314 x 10 cells l -1, Trichodesmium erithraeum 1.05 x 10 cells l-1 and Noctiluca scintilans 5.99 x 10 cells l-1. The Multiple regression and canonical corelation analysis (CCA) also indicated a strong positive relationship between N and P with the HABs at the shrimp farms and fish cage farms sites in the Lampung Bay."