Variability in the Light Absorption Coefficient by Phytoplankton,Non-Algal Particles and Colored Dissolved Organic Matter in the Northern Gulf of California  

作　　者：Stella P.Betancur-Turizo Adriana G.González-Silvera Eduardo Santamaría-Del-Angel Roberto Millán-Núnez Eduardo Millán-Núnez Héctor García-Nava Víctor M.Godínez Laura Sánchez-Velasco 

机构地区：[1]Facultad de Ciencias Marinas,Universidad Autonoma de Baja California,Ensenada,México [2]Grupo de Investigacion en Oceanología,Facultad de Oceanografía Física,Escuela Naval de Cadetes“Almirante Padilla”,Barrio Bosque,Sector Manzanillo,Cartagena de Indias,Colombia [3]Departamento de Ecología Marina,CICESE,Ensenada,México [4]Instituto de Investigaciones Oceanológicas,Universidad Autónoma de Baja California,Ensenada,México [5]Departamento de Oceanografía Física,CICESE,Ensenada,México [6]Departamento de Plancton y Ecología Marina,CICIMAR-IPN.Av.Instituto Politécnico Nacional s/n,La Paz,México

出　　处：《Open Journal of Marine Science》2018年第1期20-37,共18页海洋科学期刊（英文）

基　　金：supported by CONACyT(Mexican Council of Science)through a PhD scholarship(No.384224);funded by projects SIMAC-CONACYT,SIMAC-2000107017;CICESE:Ecological monitoring of the Upper Gulf of California”(PANGAS-Packard Foundation);IPN-CICIMAR:SIP 1721,20160514-CONACYT:236864.

摘　　要：Variability of the optical properties of the northern Gulf of California (México) were analyzed for the first time based on six cruises performed from spring to summer (March to September) between 2008 and 2013. The changes observed in the absorption by three seawater components (phytoplankton, detritus and chromophoric dissolved organic matter or CDOM) were analyzed in relation to changes in bio-optical regions and composition of the phytoplankton community (determined based on phytoplankton pigments). Two regions with unique bio-optical characteristics were identified separated by a narrow transition zone: the Upper Gulf of California (UGC) and Northern Gulf of California (NGC). Despite the temporal changes in their spatial distribution they maintained particular characteristic. UGC is characterized by an average Chla of 1.78 mg/m3, the dominance of microphytoplankton (diatoms and dinoflagellates) and a stronger contribution of detritus to total light absorption. NGC is characterized by an average Chla of 0.7 mg/m3 and the predominance of picophytoplankton, characterized by the dominance of zeaxanthin (marker pigment for cyanobacteria) and/or chlorophyll b (marker pigment for green algae), along with a co-dominium by CDOM and phytoplankton to light absorption. Results indicate that Case II waters can be very different when evaluating the individual contribution by phytoplankton, detritus and CDOM to total light absorption what has to be considered for the selection of bio-optical models for each specific region what can also help to a better definition of the related uncertainties.Variability of the optical properties of the northern Gulf of California (México) were analyzed for the first time based on six cruises performed from spring to summer (March to September) between 2008 and 2013. The changes observed in the absorption by three seawater components (phytoplankton, detritus and chromophoric dissolved organic matter or CDOM) were analyzed in relation to changes in bio-optical regions and composition of the phytoplankton community (determined based on phytoplankton pigments). Two regions with unique bio-optical characteristics were identified separated by a narrow transition zone: the Upper Gulf of California (UGC) and Northern Gulf of California (NGC). Despite the temporal changes in their spatial distribution they maintained particular characteristic. UGC is characterized by an average Chla of 1.78 mg/m3, the dominance of microphytoplankton (diatoms and dinoflagellates) and a stronger contribution of detritus to total light absorption. NGC is characterized by an average Chla of 0.7 mg/m3 and the predominance of picophytoplankton, characterized by the dominance of zeaxanthin (marker pigment for cyanobacteria) and/or chlorophyll b (marker pigment for green algae), along with a co-dominium by CDOM and phytoplankton to light absorption. Results indicate that Case II waters can be very different when evaluating the individual contribution by phytoplankton, detritus and CDOM to total light absorption what has to be considered for the selection of bio-optical models for each specific region what can also help to a better definition of the related uncertainties.

关 键 词：Light Absorption PHYTOPLANKTON CDOM DETRITUS Ocean Color Gulf of California 

分 类 号：R73[医药卫生—肿瘤]