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Temporal and spatial variability in the cycling of nitrogen within a constructed wetland: A whole-system stable-isotope-addition experiment
Temporal spatial variability in the cycling of nitrogen a constructed wetland A whole-system stable-isotope-addition experiment
2014/4/17
Constructed wetlands attenuate effluent nutrients, are hydrodynamically well defined, and are a useful proxy for the study of nitrogen (N) transformation in eutrophic natural systems. A whole-system s...
Mass coral spawning: A natural large-scale nutrient addition experiment
Mass coral spawning A natural large-scale nutrient addition experiment
2014/4/21
A mass coral spawning event on the Heron Island reef flat in 2005 provided a unique opportunity to examine the response of a coral reef ecosystem to a large episodic nutrient addition. A post-major sp...
Iron limitation across chlorophyll gradients in the southern Drake Passage: Phytoplankton responses to iron addition and photosynthetic indicators of iron stress
Iron limitation chlorophyll gradients in the southern Drake Passage Phytoplankton responses iron addition photosynthetic
2014/4/21
Processes influencing phytoplankton bloom development in the southern Drake Passage were studied using shipboard iron-enrichment incubations conducted across a surface chlorophyll gradient near the An...
A comparative study of responses in planktonic food web structure and function in contrasting European coastal waters exposed to experimental nutrient addition
planktonic food web contrasting European coastal waters
2014/4/30
We quantify, compare, and generalize responses of experimental nutrient loadings (LN
) on planktonic community
structure and function in coastal waters. Data were derived from three mesocosm experim...
Effects of labile carbon addition on a headwater stream food web
Effects of labile carbon addition headwater stream food web
2014/5/9
We added dextrose for two 8-week periods (summer and autumn) to a highly heterotrophic headwater stream in North Carolina, U.S.A., to examine the responses of its benthic food web to increased labile ...
Stream denitrification and total nitrate uptake rates measured using a field 15N tracer addition approach
Stream denitrification total nitrate uptake rates field 15N tracer addition approach
2014/5/14
We measured denitrification and total nitrate uptake rates in a small stream (East Fork of Walker Branch in eastern Tennessee) using a new field 15N tracer addition and modeling approach that quantifi...
Autochthonous versus allochthonous carbon sources to bacteria: Results from whole-lake 13C addition experiments
Autochthonous allochthonous carbon sources bacteria whole-lake 13C
2014/5/14
Organic substrates for pelagic bacteria are derived from dissolved organic carbon (DOC) in the water column. DOC is a heterogeneous mixture of molecules, some of which are imported from the watershed ...