During the Subarctic Pacific Iron Experiment for the Ecosystem Dynamics Study (SEEDS), chlorophyll a concentration in the iron patch reached near maximum in 9 days (D9) after the iron fertilization and after that remained more or less constant. In spite of the stability of chlorophyll a, primary production was higher than 1.4–2.0 g C m d during D9–D13. As most of the carbon synthesized by phyto...

Mixed-layer dynamics exert a first order control on nutrient and light availability for phytoplankton. In this study, we examine the influence of mixed-layer net community production (NCP) in Southern Ocean intra-seasonal, seasonal, interannual, decadal timescales, using biogeochemical Argo floats satellite-derived NCP estimates during period from 1997 to 2020. On intraseasonal shoaling mixed l...

We report on results of a trawl survey to assess the abundance of Batoid fish resources in the Oman Sea. The catch per unit area CPUA as the main index was estimated. The objectives of this study were to determine the catch composition and distribution pattern of Batoid fishes in the study area and in different depth strata of the Oman Sea.A total of 82stations were randomly selected 2012. The ...

Abstract. The Peruvian upwelling system hosts a marine ecosystem with extremely high productivity. Observations show that the is only eastern boundary (EBUS) an out-of-phase relationship between seasonal surface chlorophyll concentrations and intensity. This “seasonal paradox” triggers following questions: (1) what are unique characteristics of system, compared other EBUSs, lead to relationship...