• Publications
  • Influence
Impacts of climate warming on terrestrial ectotherms across latitude
The results show that warming in the tropics, although relatively small in magnitude, is likely to have the most deleterious consequences because tropical insects are relatively sensitive to temperature change and are currently living very close to their optimal temperature, so that warming may even enhance their fitness. Expand
Spatial coupling of nitrogen inputs and losses in the ocean
It is concluded that oceanic nitrogen fixation is closely tied to the generation of nitrogen-deficient waters in denitrification zones, supporting the view that nitrogen fixation stabilizes the oceanic inventory of fixed nitrogen over time. Expand
Why tropical forest lizards are vulnerable to climate warming
Focal species analyses show that some tropical forest lizards were already experiencing stressful body temperatures in summer when studied several decades ago, and simulations suggest that warming will not only further depress their physiological performance in summer, but will also enable warm-adapted, open-habitat competitors and predators to invade forests. Expand
Denitrification and N2 fixation in the Pacific Ocean
We establish the fixed nitrogen budget of the Pacific Ocean based on nutrient fields from the recently completed World Ocean Circulation Experiment (WOCE). The budget includes denitrification in theExpand
Putting the Heat on Tropical Animals
To assess whether independent data support these assertions, longterm demographic data on tropical species are required, and the implications of this pattern for species vulnerabilities to climate change have rarely been investigated. Expand
Climate-Forced Variability of Ocean Hypoxia
It is shown that the spatial extent of hypoxia is highly sensitive to small changes in the ocean’s O2 content, with maximum responses at suboxic concentrations where anaerobic metabolisms predominate, creating a link between decadal climate oscillations and the nutrient limitation of marine photosynthesis. Expand
The dual isotopes of deep nitrate as a constraint on the cycle and budget of oceanic fixed nitrogen
We compare the output of an 18-box geochemical model of the ocean with measurements to investigate the controls on both the mean values and variation of nitrate d 15 N and d 18 O in the oceanExpand
Ocean nutrient ratios governed by plankton biogeography
The N/P ratio of biological nutrient removal varies across latitude in Southern Ocean surface waters, from 12:1 in the polar ocean to 20: 1 in the sub-Antarctic zone, governed by regional differences in the species composition of the plankton community. Expand
Parameterizing bubble-mediated air-sea gas exchange and its effect on ocean ventilation
[1] Bubbles play an important role in the exchange of gases between the atmosphere and ocean, altering both the rate of exchange and the equilibrium gas saturation state. We develop aExpand
Physical-biological interactions in North Pacific oxygen variability
[1] We investigate the temporal variability of oxygen in the upper water column of the North Pacific using a hindcast ocean model. The model embeds simple biogeochemical cycles of nutrients and O2Expand