Ecogeochemistry—the application of geochemical techniques to fundamental questions in
population and community ecology—has been used in animal migration studies in terrestrial …

Twenty years ago, measurements on ice cores showed that the concentration of carbon
dioxide in the atmosphere was lower during ice ages than it is today. As yet, there is no …

Ocean Biogeochemical Dynamics provides a broad theoretical framework upon which
graduate students and upper-level undergraduates can formulate an understanding of the …

We report a novel method for measurement of the oxygen isotopic composition (18O/16O) of
nitrate (NO3-) from both seawater and freshwater. The denitrifier method, based on the …

John H. Martin, who discovered widespread iron limitation of ocean productivity, proposed
that dust-borne iron fertilization of Southern Ocean phytoplankton caused the ice age …

The ocean's biological pump strips nutrients out of the surface waters and exports them into
the thermocline and deep waters. If there were no return path of nutrients from deep waters …

The surface water of the marine environment has traditionally been viewed as a nitrogen (N)
limited habitat, and this has guided the development of conceptual biogeochemical models …

A nitrogen stable isotopic model was constructed in order to constrain the Holocene marine‐
fixed nitrogen budget. The primary sources and sinks considered were riverine and …

Fracture is a fundamental mechanism of material failure. Two basic types of brittle fractures
are commonly observed in rock deformation experiments—extension (opening mode) …

We report the first measurements of coupled nitrogen (N) and oxygen (O) isotopic variations
of nitrate (NO) during its assimilation by laboratory cultures of marine phytoplankton and …