Phytoplankton pigments and functional community structure in relation to environmental factors in the Pearl River Estuary

• Autorzy: Chai C. , Jiang T. , Cen J. , Ge W. , Lu S.

Identyfikatory

DOI

10.1016/j.oceano.2016.03.001

• Języki publikacji: EN

Abstrakty

EN

Two cruises were undertaken in the Pearl River Estuary in November 2011 and March 2012 to analyze the distribution of phytoplankton pigments and to define the relationships of pigment indices and functional community structure with environmental factors. Among 22 pigments, 17 were detected by high-performance liquid chromatography. Chlorophyll a was found in all samples, with a maximum of 7.712 μg L^-1 in spring. Fucoxanthin was the most abundant accessory pigment, with mean concentrations of 2.914 μg L^-1 and 0.207 μg L^-1 in spring and autumn, respectively. Chlorophyll a, chlorophyll c₂, fucoxanthin, diadinoxanthin, and diatoxanthin were high in the northern or northwest estuary in spring and in the middle-eastern and northeast estuary in autumn. Chlorophyll b, chlorophyll c₃, prasinoxanthin, and peridinin were similarly distributed during the two cruises. Chlorophyll a and fucoxanthin positively correlated with nutrients in spring, whereas 19′-hex-fucoxanthin and 19′-but-fucoxanthin negatively correlated. The biomass proportion of microphytoplankton (BP_m) was higher in spring, whereas that of picophytoplankton (BP_p) was higher in autumn. BP_m in spring was high in areas with salinity <30, but BP_p and the biomass proportion of nanophytoplankton (BP_n) were high in areas with salinity >30. BP_m increased but BP_n reduced with the increase in nutrient contents. By comparison, BP_p reduced with the increase in nutrient contents in spring, but no relationship was found between BP_p and nutrient contents in autumn. The ratios of photosynthetic carotenoids to photoprotective carotenoids in the southern estuary approached unity linear relationship in spring and were under the unity line in autumn.

Słowa kluczowe

EN

phytoplankton; pigments; functional community; HPLC; Pearl River estuary

• Wydawca: Polish Academy of Sciences, Institute of Oceanology ; Elsevier
• Czasopismo: Oceanologia
• Rocznik: 2016
• Tom: No. 58 (3)
• Strony: 201--211
• Opis fizyczny: Bibliogr. 54 poz., tab., wykr., mapy

Twórcy

autor

Chai C.

• Qingdao Engineering Research Center for Rural Environment, Qingdao Agricultural University, Qingdao, China
• Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China

autor

Jiang T.

• Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China

autor

Cen J.

• Research Center for Harmful Algae and Marine Biology, Jinan University, Guangzhou, China

autor

Ge W.

• College of Life Sciences, Qingdao Agricultural University, Qingdao, China

autor

Lu S.

• Research Center for Harmful Algae and Marine Biology, Jinan University, Guangzhou, China

Bibliografia

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