Constraining the role of dust deposition in regulating concentration essential micronutrient iron surface ocean waters requires knowledge flux seawater-soluble aerosols and replacement time dissolved (DFe) euphotic zone. Here we estimate these quantities using seasonally resolved DFe data from Bermuda Atlantic Time-series Study region weekly-scale measurements rain during 2019. In response to s...

Station ALOHA (A Long-term Oligotrophic Habitat Assessment) was established in the North Pacific Subtropical Gyre (22°45′N, 158°W) as an oligotrophic ocean benchmark to improve our understanding of processes that govern fluxes carbon (C) into and from surface ocean. At approximately monthly intervals, measurements primary production particulate C (PC) using 14C method, export PC nitrogen (PN) s...

under the contemporary scenario of global climate change and increasing coastal eutrophication, baseline studies of phytoplankton diversity and distribution in relation to habitat conditions constitute the first approach to evaluate potential shifts at the base of the food webs. here we present data of phytoplankton species composition and environmental variables in winter 2006 in a temperate ...

Background: The bottom-up (food resources) and top-down (grazing pressure) controls, with other environmental parameters (water temperature, pH) are the main factors regulating the abundance and structure of microbial communities in aquatic ecosystems. It is still not definitively decided which of the two control mechanisms is more important. The significance of bottom-up versus top-down contro...

Citromicrobium bathyomarinum is a bacteriochlorophyll a-containing aerobic anoxygenic phototrophic bacterium. Here, we report the draft genome sequence of C. bathyomarinum JL354, which was the first C. bathyomarinum strain isolated from a euphotic marine environment. The JL354 genome sequence reveals, for the first time, the coexistence of two different photosynthetic operons in a single strain.

BACKGROUND The bottom-up (food resources) and top-down (grazing pressure) controls, with other environmental parameters (water temperature, pH) are the main factors regulating the abundance and structure of microbial communities in aquatic ecosystems. It is still not definitively decided which of the two control mechanisms is more important. The significance of bottom-up versus top-down control...

We measured pools of dissolved phosphorus (P), including dissolved inorganic P (DIP), dissolved organic P (DOP) and alkaline phosphatase (AP)-hydrolyzable labile DOP (L-DOP), and kinetic parameters of AP activity (APA) in the euphotic zone in the western North Pacific Ocean. Samples were collected from one coastal station in Sagami Bay, Japan, and three offshore stations between the North Pacif...

In San Francisco Bay (SFB), light availability is largely determined by the concentration of suspended particulate matter (SPM) in water column. SPM exhibits substantial variation with time, depth, and location. To study how influences phytoplankton growth, we coupled a sediment transport model hydrodynamic biogeochemical model. The models were used to simulate conditions for year 2011 focus on...

Physical and biogeochemical processes in the Southern Ocean are fundamental for modulating global climate. In this context, a process-based understanding of how Antarctic diatoms control primary production carbon export, hence global-ocean sequestration, has been identified as scientific priority. Here we use novel sediment trap observations combination with data-assimilative ocean biogeochemis...

Abstract The Variability of chlorophyll-specific phytoplankton light absorption [a*ph (λ)] was examined over depth and time in stratified offshore waters the North-Western Mediterranean Sea. Coherent water patches were tracked with Lagrangian drifters during two oceanographic cruises September (late summer) May (post-spring bloom phase). By simultaneously analysing pigment measurements, we expl...