Changes of Phytoplankton Community with Inflow of Sea Water in Gyoungpo Lake; Comparison between 1998 and 2012.

Effects of the sea-ice edge and the Polar Frontal Zone on the distribution of chlorophyll-a levels in the pelagic were investigated during multi-year observations in insufficiently studied and rarely navigable regions of the Barents Sea. Samples were collected at 52 sampling stations combined into 11 oceanographic transects over a Barents Sea water area north of the latitude 75° N during spring 2016, 2018, and 2019. The species composition, abundance and biomass of the phytoplankton community, chlorophyll-a concentrations, hydrological and hydrochemical parameters were analyzed. The annual phytoplankton evolution phase, defined as an early-spring one, was determined throughout the transects. The species composition of the phytoplankton community and low chlorophyll-a levels suggested no phytoplankton blooming in April 2016 and 2019. Not yet started sea-ice melting prevented sympagic (sea-ice-associated) algae from being released into the seawater. In May 2018, ice melting began in the eastern Barents Sea and elevated chlorophyll-a levels were recorded near the ice edge. Chlorophyll-a concentrations substantially differed in waters of different genesis, especially in areas influenced by the Polar Front. The Polar Front separated the more productive Arctic waters with a chlorophyll-a concentration of 1–5 mg/m3 on average from the Atlantic waters where the chlorophyll-a content was an order of magnitude lower.

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Spatial variations of phytoplankton community structure in a highly eutrophicated coast of the Western Mediterranean Sea

Water Science & Technology ◽

10.2166/wst.1995.0698 ◽

1995 ◽

Vol 32 (9-10) ◽

pp. 313-322 ◽

Cited By ~ 4

Author(s):

E. Soler Torres ◽

J. G. del Río

Keyword(s):

Phytoplankton Community ◽

Sea Water ◽

Western Mediterranean ◽

Nutrient Concentrations ◽

Western Mediterranean Sea ◽

Open Sea ◽

Southern Side ◽

Well Differentiated ◽

Abundance And Diversity ◽

Physical And Chemical

Pinedo is a small beach placed at the southern side of Valencia (Eastern Spain). This coastal area has became highly eutrophicated because of the discharge of a large flow of urban wastewaters at the shore line. In order to assess the environmental impact of a new sea outfall and to study the phytoplankton and nutrients dynamics of this eutrophicated system a broad survey was conducted between May 1989 and April 1990. Physical and chemical parameters were measured through a transect laying between the wastewater discharge point and the open sea. In this paper we report preliminary results about the variations observed in the phytoplankton community along this sharp environmental gradient. Three main zones with particular phytoplankton structure appear well differentiated. The first is an inshore zone very influenced by continental loadings where brackish and polluted waters were found. Phytoplankton shows relatively low numbers being dominated by Chlorophyceae and a few other eurihaline species. An intermediate zone has salinities close to sea water but nutrient concentrations are high enough to allow maximum development of phytoplankton, which reaches its highest abundance and diversity values. Diatoms, dinoflagellates and some flagellates (Prymnesiophyceae and Cryptophyceae) dominate the eukaryotic community of this zone. Gradual impoverishment of sea water is accompanied by a rapid decrease of phytoplankton biomass, which is reduced to scarce flagellates populations at the open sea stations.

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DINAMIKA KOMUNITAS FITOPLANKTON DAN KUALITAS PERAIRAN DI LINGKUNGAN PERAIRAN TAMBAK UDANG INTENSIF: SEBUAH ANALISIS KORELASI

JURNAL BIOLOGI TROPIS ◽

10.29303/jbt.v13i2.150 ◽

2013 ◽

Vol 13 (2) ◽

Author(s):

Bambang Widigdo Dan Yusli Wardiatno

Keyword(s):

Inorganic Phosphate ◽

Phytoplankton Community ◽

Sea Water ◽

Inorganic Nitrogen ◽

Similarity Index ◽

Dissolved Inorganic Nitrogen ◽

Mixing Processes ◽

Shrimp Ponds ◽

Shrimp Pond ◽

Made In

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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