Ekialdeko Kantauriar Itsasoko kostaldeko partikula exopolimeriko gardenen (PEG) urtean zeharreko bilakaera
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Partikula exopolimeriko gardenak (PEG) ozeanoetako zeluletatik kanpoko substantzia polimeriko ugarienak dira. Karbonoaren ponpa biologikoan, aire-itsaso elkarrekintzan eta mikrobio-sareetan duten eragina dela eta, prozesu biogeokimikoetan eta ekologikoetan garrantzia handia dute. PEG-en sorrera biotikoa zein abiotikoa izan daitekeen arren, beraien iturri garrantzitsuena fitoplanktonak jariaturiko polisakaridoen koagulazioa da. Partikula hauen sortze- eta desagertze-prozesuen konplexutasun handiaren ondorioz, zaila da PEG-en bilakaera aurresatea. Lan honetan PEG-en kontzentrazioak eta bilakaera aztertu dira Armintzako itsas-estazioan, Ekialdeko Kantauriar Itsasoan kokatuta dagoena. Urte baten buruan 11 laginketa egin ziren, zeintzuetan PEG-en kontzentrazioaz gain, bestelako aldagai fisikoak, kimikoak eta biologikoak neurtu ziren, beraien arteko ustezko erlazioan sakontzeko asmoz. Sistema honetako PEG-en kontzentrazioaren faktore erregulatzaile nagusienak a klorofiladun fototrofoen eta prokariotoen dentsitateak dira.
Transparent exopolymer particles (TEPs) are the most abundant subclass of organic particles in the ocean. They have a high impact in biogeochemical cycles and ecological processes of the ocean, such as the biological carbon pump, air-sea interactions and the microbial loop. Although they are formed from different biotic and abiotic processes, coagulation of polysaccharides exuded by phytoplankton is their main source of production. The complexity in their production and consumption make TEP dynamics hardly predictable. In the present work, we study the TEP concentration and temporal evolution in the Armintza coastal station (Eastern Cantabrian Sea). In 11 seawater samples collected during one year, we measured the TEP concentration together with several physicochemical and biological parameters in order to detect any relationship among them. In this system, TEPs were closely related to and probably regulated by the abundances of phototrophic microoorganisms rich in chlorophyll a, in particular Synechococcus cyanobacteria, and heterotrophic prokaryotes.
Transparent exopolymer particles (TEPs) are the most abundant subclass of organic particles in the ocean. They have a high impact in biogeochemical cycles and ecological processes of the ocean, such as the biological carbon pump, air-sea interactions and the microbial loop. Although they are formed from different biotic and abiotic processes, coagulation of polysaccharides exuded by phytoplankton is their main source of production. The complexity in their production and consumption make TEP dynamics hardly predictable. In the present work, we study the TEP concentration and temporal evolution in the Armintza coastal station (Eastern Cantabrian Sea). In 11 seawater samples collected during one year, we measured the TEP concentration together with several physicochemical and biological parameters in order to detect any relationship among them. In this system, TEPs were closely related to and probably regulated by the abundances of phototrophic microoorganisms rich in chlorophyll a, in particular Synechococcus cyanobacteria, and heterotrophic prokaryotes.
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partikula exopolimeriko gardenak (PEG), karbonoaren ponpa biologikoa, a klorofila, fototrofoak, prokarioto heterotrofoak, Ekialdeko Kantauriar Itsasoa., Transparent exopolymer particles (TEP), biological carbon pump, chlorophyll a, phototrophs, heterotrophic prokaryotes, Eastern Cantabrian Sea.