30 results on '"Hawke, David J."'
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2. Isotopic evidence for oligotrophication of terrestrial ecosystems
3. Mobilisation of recalcitrant soil nutrient fractions supports foliar nitrogen to phosphorus homeostasis in a seabird soil
4. Soil selenium in a forested seabird colony: distribution, sources, uptake by plants, and comparison with non-seabird sites
5. Incorporation of the invasive mallow Lavatera arborea into the food web of an active seabird island
6. Soil P in a forested seabird colony: inventories, parent material contributions, and N : P stoichiometry
7. The prevention and detection of human error in ecological stable isotope analysis.
8. Forest stream biota carbon : nitrogen ratios are unaffected by nutrient subsidies from breeding Westland petrels (Procellaria westlandica).
9. Dandy of a story
10. Minimal ecosystem uptake of selenium from Westland petrels, a forest-breeding seabird.
11. Microbial carbon concentration in samples of seabird and non-seabird forest soil: Implications for leaf litter cycling.
12. Closing the circle: how ecologists can prepare their own quality control material to increase confidence in stable isotope data.
13. 13C and 15N enrichment in snipe (Coenocorypha spp.) from islands across the New Zealand biogeographic region.
14. Stable isotopic (δ15N, δ13C) analysis of wood in trees growing in past and present colonies of burrow-nesting seabirds in New Zealand. I. δ15N in two species of conifer (Podocarpaceae) from a mainland colony of Westland petrels (Procellaria westlandica), Punakaiki, South Island.
15. Incorporation of marine-derived nutrients from petrel breeding colonies into stream food webs.
16. Maximum possible age of a petrel breeding colony near Punakaiki (South Island, New Zealand) from radiocarbon and stable isotope analysis of soil.
17. Hydrology and near‐surface nutrient distribution along the South Otago continental shelf, New Zealand, in summer and winter 1986.
18. Determination of metals in sewage sludge by inductively coupled plasma atomic emission spectrometry using a simplified nitric acid digestion method.
19. Determination of sulphides in water and effluents using gas chromatography.
20. Outdoor Education: Same Direction, Different Path.
21. On Being A Naturalist.
22. Uptake of Fe(II) and Mn(II) on chitin as a model organic phase
23. Ionic interactions of divalent metals in natural waters
24. A potentiometric and spectrophotometric study of the system H +Al 3+-chrome azurol S
25. Reactive P distribution near Otago Peninsula, New Zealand: An advection-dominated shelf system containing a headland eddy
26. Equilibrium adsorption of thorium by metal oxides in marine electrolytes
27. Equilibrium modelling of interferences in the visible spectrophotometric determination of aluminium(III): Comparison of the chromophores chrome azurol S, eriochrome cyanine R and pyrocatechol violet, and stability constants for eriochrome cyanine R-aluminium complexes
28. Dissolved trace metal speciation in the Manuherikia River, central Otago, New Zealand
29. Salinity variability in shelf waters near Otago Peninsula, New Zealand, on a time scale of hours
30. Verification of seabird contributions to Australasian harrier diet at Motunau Island, North Canterbury, using stable isotope analysis
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