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Utilization of different nitrogen sources by the marine cyanobacteria Prochlorococcus and Synechococcus
different nitrogen sources marine cyanobacteria Prochlorococcus Synechococcus
2014/5/27
Prochlorococcus is the most abundant phytoplankter throughout the photic zone in stratified marine waters and experiences distinct gradients of light and nitrogen nutrition. Physiologically and geneti...
Carbon, nitrogen, and phosphorus budgets for a shallow subtropical coastal embayment (Moreton Bay, Australia)
Carbon nitrogen phosphorus shallow subtropical coastal embayment
2014/5/27
Average annual carbon, nitrogen, and phosphorus budgets were constructed for Moreton Bay. Primary production was the dominant source of carbon (by two orders of magnitude), N fixation was the dominant...
Peptide hydrolysis, amino acid oxidation, and nitrogen uptake in communities seasonally dominated by Aureococcus anophagefferens
Peptide hydrolysis amino acid oxidation nitrogen uptake communities seasonally Aureococcus anophagefferens
2014/5/27
Elevated levels of dissolved organic nitrogen (DON) and dissolved inorganic nitrogen (DIN) are among the factors implicated in the initiation of algal blooms. However, the degree to which phytoplankto...
Influence of simulated bivalve biodeposition and microphytobenthos on sediment nitrogen dynamics: A laboratory study
simulated bivalve biodeposition microphytobenthos sediment nitrogen dynamics
2014/5/26
Suspension-feeding eastern oysters, Crassostrea virginica, were once abundant in Chesapeake Bay and may then have exerted top-down control on phytoplankton and also reduced turbidities, thereby increa...
Fine-scale mapping of land-derived nitrogen in coral reefs by d15N in macroalgae
Fine-scale mapping land-derived nitrogen coral reefs d15N in macroalgae
2014/5/26
We measured the C/N ratio and δ15N values of two brown macroalgae — Padina spp. and Dictyota sp., which are distributed over all the subtropical fringing reefs of the Ryukyu Islands, Japan— ...
Increased sensitivity to ultraviolet radiation in nitrogen-limited dinoflagellates: Photoprotection and repair
Increased sensitivity ultraviolet radiation nitrogen-limited dinoflagellates Photoprotection and repair
2014/5/26
Nitrogen (N) limitation significantly increased the sensitivity of photosynthesis to inhibition by ultraviolet radiation (UV) in two estuarine dinoflagellates, Akashiwo sanguinea (= Gymnodinium sangui...
Seasonal variations in uptake and in situ regeneration of nitrogen in mangrove waters
Seasonal variations uptake situ regeneration nitrogen in mangrove waters
2014/5/26
Seasonal changes of uptake of nitrogenous nutrients (NH4+, NO3-, NO2-, and urea) and regeneration (NH4+ and NO2- production) in the plankton fraction of a mangrove ecosystem on the west coast of India...
Effects of temperature, nitrogen, and light limitation on the optical properties of the marine diatom Thalassiosira pseudonana
Effects of temperature, nitrogen, and light limitation the optical properties the marine diatom Thalassiosira pseudonana
2014/5/26
A series of laboratory experiments were conducted to examine the optical properties of the marine diatom Thalassiosira pseudonana for a broad range of growth rates (μ from 0.22 to 2 d-1) under tempera...
Iron availability, cellular iron quotas, and nitrogen fixation in Trichodesmium
Iron availability cellular iron quotas nitrogen fixation Trichodesmium
2014/6/9
Iron availability is suggested to be a primary factor limiting nitrogen fixation in the oceans. This hypothesis is principally based on cost-benefit analyses of iron quotas in the dominant nitrogen-fi...
Baltic Sea nitrogen fixation estimated from the summer increase in upper mixed layer total nitrogen
Baltic Sea nitrogen fixation the summer increase upper mixed layer total nitrogen
2014/6/9
We estimated nitrogen fixation from the increase in total nitrogen (N2 gas excluded) in the upper 20 m during the summer biomass increase of heterocystous filamentous cyanobacteria at the off-shore La...
Massive developments of microbial mats following phytoplankton blooms in a naturally eutrophic bay: Implications for nitrogen cycling
microbial mats phytoplankton blooms naturally eutrophic bay nitrogen cycling
2014/6/9
Benthic nitrogen processes have received substantial attention because the release of nutrients from sediments can contribute to the requirements of pelagic primary production; their study can also gi...
Epilithic nitrogen fixation in the rocky littoral zones of Lake Malawi, Africa
Epilithic nitrogen fixation rocky littoral zones Lake Malawi Africa
2014/6/9
Rates of epilithic N2 fixation in the rocky littoral zones of Lake Malawi, determined by in situ incubations and the acetylene reduction method, declined with depth, were highly correlated to light in...
Sorptive fractionation of dissolved organic nitrogen and amino acids onto fine sediments within the Amazon Basin
dissolved organic nitrogen amino acids
2014/5/30
A consistent observation of river waters in the Amazon Basin and elsewhere is that suspended fine particulate
organic matter (FPOM) is compositionally distinct from coexisting dissolved organic...
Effect of temperature on diatom volume, growth rate, and carbon and nitrogen content: Reconsidering some paradigms
iatom volume growth rate carbon
2014/5/30
We examined the response of diatoms to naturally experienced temperatures and tested these hypotheses: (1)
diatoms follow the rule that organism size decreases with increasing temperature; (2) diatom...
Microbial degradation of organic carbon and nitrogen on diatom aggregates
organic carbon nitrogen
2014/5/30
The major pathways of transformation of particulate organic matter by heterotrophic bacteria are respiration and
production of new biomass. Until today only a limited number of studies have measured ...