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Reconstructing the development of eutrophication in Louisiana salt marshes
Reconstructing Louisiana salt marshes
2014/4/30
We collected sediment cores from three salt marsh ponds in coastal Louisiana to test the usefulness of proxies
of eutrophication. One-centimeter increments of
210
Pb- and
137
Cs-dated sediment we...
Sources of nitrogen used for denitrification and nitrous oxide formation in sediments of the hypernutrified Colne, the nutrified Humber, and the oligotrophic Conwy estuaries, United Kingdom
denitrifi cation nitrous oxide
2014/4/30
Rates of denitrification and nitrous oxide (N2
O) formation, and the sources of N2
and N2
O, were examined by
the isotope-pairing technique in three U.K. estuaries (Colne, Humber, Conwy), wh...
Top-down control from the bottom: Regulation of eutrophication in a large river by benthic grazing
Regulation of eutrophication benthic grazing
2014/4/30
We use a 15-yr record from a 100-km stretch of the tidal, freshwater Hudson River to examine the controls of
phytoplankton biomass. Across years, seasonal mean chlorophyll a (Chl a) and maximum Chl a...
Effects of short-term food variability on the plasticity of age and size at metamorphosis of porcelain crab larvae
short-term food variability age and size
2014/5/13
In a series of three experiments, we tested the effects of short-term food variability on the larval development
of Petrolisthes cabrilloi. We first reared seven sibling clutches of zoeae at 19...
Structure of synechobactins, new siderophores of the marine cyanobacterium Synechococcus sp. PCC 7002
synechobactins marine cyanobacterium Synechococcus
2014/5/13
The coastal marine cyanobacterium Synechococcus sp. PCC 7002 produces three amphiphilic siderophores, synechobactins A-C, under iron-limiting growth conditions. The synechobactins are comprised of a c...
Motility patterns and mate encounter rates in planktonic copepods
Motility patterns mate encounter rates
2014/5/13
Mate encounter rates in pelagic copepods depend on the characteristics of the mate detection mechanism as well
as on the motility patterns and concentrations of males and females. We describe male an...
In-channel transient storage and associated nutrient retention: Evidence from experimental manipulations
In-channel transient storage associated nutrient retention
2014/5/13
We examined the effect of in-channel flow obstructions such as vegetation and coarse woody debris (CWD) on
transient storage and nutrient uptake by using experimental channel manipulations. Tra...
In-channel transient storage and associated nutrient retention: Evidence from experimental manipulations
In-channel transient storage associated nutrient retention
2014/5/13
We examined the effect of in-channel flow obstructions such as vegetation and coarse woody debris (CWD) on
transient storage and nutrient uptake by using experimental channel manipulations. Tra...
Bio-optical and biogeochemical properties of different trophic regimes in oceanic waters
trophic regimes Bio-optical
2014/5/13
To examine the source and magnitude of the variability of bio-optical properties in open ocean, we simultaneously
measured inherent optical properties (IOPs) and biogeochemical quantities during late...
Effect of atmospheric nutrients on the autotrophic communities in a low nutrient, low chlorophyll system
atmospheric nutrients nutrient low chlorophyll system
2014/5/13
The effect of atmospheric inputs on phytoplanktonic dynamics was investigated in the Mediterranean Sea during
the season characterized by a stratified water column, low primary productivity, an...
Nutrient recycling by fish versus zooplankton grazing as drivers of the trophic cascade in alpine lakes
fi sh versus alpine lakes
2014/5/13
In a multilake experiment, we found little effect of nutrient excretion by zooplanktivorous fish, but a large effect
of herbivorous zooplankton, on phytoplankton biomass and phosphorus (P) limi...
Photosynthesis-controlled calcification in a hypersaline microbial mat
Photosynthesis-controlled calcifi cation hypersaline microbial mat
2014/5/13
We investigated the hypothesis that sulfate reduction rather than oxygenic photosynthesis promotes calcification
in a hypersaline microbial mat by increasing the ion concentration product: ICP ...
Experimental test of bacteria–phytoplankton coupling in the Southern Ocean
bacteria–phytoplankton coupling Southern Ocean
2014/5/13
A set of eight large (20 m3
) mesocosms were moored in Johnson’s Dock (62839.5769S, 60822.4089W, Livingston Island,
Antarctica) to experimentally generate a gradient of phytoplankton biomass and pro...
Small-scale spatial and temporal variability in coastal benthic O2 dynamics: Effects of fauna activity
Small-scale spatial temporal variability
2014/5/19
In situ measurements in a shallow water sediment were performed using three different modules—a microprofiling
unit, a transparent benthic chamber, and a planar optode periscope. The combined d...
Seasonal bioavailability of dissolved organic carbon and nitrogen from pristine and polluted freshwater wetlands
Seasonal bioavailability pristine
2014/5/19
We examined the chemical composition and bioavailability of dissolved organic carbon (DOC) and nitrogen
(DON) from two pristine and two polluted cedar bog wetlands across three seasons. Pristine and ...