Search Results - "Hawke, D. J."

Avian assimilation and dispersal of carbon and nitrogen brought ashore by breeding Westland petrels (Procellaria westlandica): a stable isotope study by Hawke, D. J., Holdaway, R. N.

“…Only a small proportion of the marine nutrients brought ashore by breeding colonial seabirds is retained in colony soils. However, means by which these marine…”
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Breeding Westland petrels as providers of detrital carbon and nitrogen for soil arthropods: a stable isotope study by Hawke, DJ, Clark, JM, Vallance, JR

“…Seabirds deposit large quantities of marine detritus on land, but little is known of the soil arthropods processing this material. Burrow-nesting seabirds…”
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Foliar and soil N and δ15N as restoration metrics at Pūtaringamotu Riccarton Bush, Christchurch city by Hawke, D. J., Cranney, O. R., Horton, T. W., Bury, S. J., Brown, J. C. S., Holdaway, R. N.

“…Delta 15 N values and associated N concentrations may be useful nutrient cycling metrics for assessing restoration progress, and complement biodiversity…”
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Carbon-13 and nitrogen-15 enrichment in coastal forest foliage from nutrient-poor and seabird-enriched sites in southern New Zealand by Hawke, D. J., Newman, J.

“…To assess the effect of nutrient inputs from breeding seabirds on forest foliage δ 13 C and δ 15 N, we collected foliage samples from two contrasting…”
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new epizoic laelapid mite from the New Zealand sand scarab Pericoptus truncatus larvae and its isotopic ecology by Clark, JM, Hawke, DJ

“…A new genus Mumulaelaps (Mesostigmata: Laelapidae: Hypoaspidini) is proposed to hold large, pale, agile, gregarious mites associated with the larvae of the…”
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Isotopic signatures (13C/12C; 15N/14N) of blue penguin burrow soil invertebrates: carbon sources and trophic relationships by Hawke, DJ, Clark, JM

“…Seabird burrows provide a soil environment for processing discards such as feathers and guano, hence constituting a primary interface between the sea and the…”
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sub-Antarctic mite Ayersacarus: a new species from mainland New Zealand, and its isotopic ecology (Acari: Mesostigmata: Leptolaelapidae) by Clark, JM, Hawke, DJ

“…Ayersacarus woodi sp. n. (Acari: Leptolaelapidae) is described from Westland petrel (Procellaria westlandica Falla) burrows at Punakaiki, South Island, New…”
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Ayersacarus, an endemic mite genus from Zealandian seabird nest environments: revision, with four new species (Acari: Mesostigmata: Leptolaelapidae) by Clark, JM, Hawke, DJ

“…Four new species of Ayersacarus Hunter (Acari: Mesostigmata: Leptolaelapidae) are described: A. hurleyi sp. n. from Stephens I./Takapourewa (Cook Strait, New…”
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Surface soil chemistry at an alpine procellariid breeding colony in New Zealand, and comparison with a lowland site by Harrow, G., Hawke, D. J., Holdaway, R. N.

“…Procellariid seabirds occupied colonies on the pre-human New Zealand mainland from the lowlands to alpine areas, but the effect of geographic environment on…”
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Incorporation of marine-derived nutrients from petrel breeding colonies into stream food webs by Harding, Jon S., Hawke, David J., Holdaway, Richard N., Winterbourn, Michael J.

“…Summary 1. Stable isotope ratios of aquatic invertebrates, aquatic mosses and leaves of riparian plants were used to determine whether marine‐derived nutrients…”
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Maximum possible age of a petrel breeding colony near Punakaiki (South Island, New Zealand) from radiocarbon and stable isotope analysis of soil by Hawke, David J.

“…The lifetime of individual petrel colonies is poorly known. This study used radiocarbon, 13 C, and 15 N analysis of soil to determine the maximum possible age…”
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Foliar and soil N and [delta]15N as restoration metrics at Putaringamotu Riccarton Bush, Christchurch city by Hawke, D J, Cranney, O R, Horton, T W, Bury, S J, Brown, J C S, Holdaway, R N

“…Delta15N values and associated N concentrations may be useful nutrient cycling metrics for assessing restoration progress, and complement biodiversity…”
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Foliar and soil N and δ 15 N as restoration metrics at Pūtaringamotu Riccarton Bush, Christchurch city by Hawke, D. J., Cranney, O. R., Horton, T. W., Bury, S. J., Brown, J. C. S., Holdaway, R. N.

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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 by Hawke, David J., Powell, H.Kipton J., Simpson, Stuart L.

“…Equilibria in the Al 3+ H +-eriochrome cyanine R (ECR) system were studied by potentiometry and spectrophotometry in 0.10 M KC1 at 25 °C and p[H +]2.5–6.5…”
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The sub-Antarctic mite Ayersacams: a new species from mainland New Zealand, and its isotopic ecology (Acari: Mesostigmata: Leptolaelapidae) by Clark, J M, Hawke, D J

“…Ayersacarus woodi sp. n. (Acari: Leptolaelapidae) is described from Westland petrel (Procellaria westlandica Falla) burrows at Punakaiki, South Island, New…”
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Isotopic signatures ( super(13)C/ super(12)C; super(15)N/ super(14)N) of blue penguin burrow soil invertebrates: carbon sources and trophic relationships by Hawke, D J, Clark, J M

“…Seabird burrows provide a soil environment for processing discards such as feathers and guano, hence constituting a primary interface between the sea and the…”
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Simulation based design of reluctance motors for traction applications in hybrid and electric vehicles by Riley, C.P, Sawant, N.P, Ilea, D, Venskus, A, Bedford, A.M, Michaelides, A.M, Vinamata, X, Topping, P.J, Soler-Vizan, J.M, Odvarka, E, Wale, J.D, Hawke, D.J, Reeve, J.M

“…Electric and hybrid vehicles are mostly reliant on permanent magnet motors for traction. This paper focusses on the design challenges of alternative motor…”
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super(13)C and super(15)N enrichment in snipe (Coenocorypha spp.) from islands across the New Zealand biogeographic region by Hawke, D J, Miskelly, C M

“…The remaining five Coenocorypha snipes are restricted to remote islands in the New Zealand archipelago, so their ecology is difficult to study directly. To…”
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Erratum to "Incorporation of marine-derived nutrients from petrel breeding colonies into stream food webs" [Freshwat. Biol. 49 (2004) 576-586] by Harding, J S, Hawke, D J, Holdaway, R N, Winterbourn, MJ

“…In Fig. 2 of the article, the y-axis label should read ' delta super(15)N (ppt)' and not ' delta super(15)C (ppt)'. The corrected figure is given…”
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Stable isotopic ( delta super(15)N, delta super(13)C) analysis of wood in trees growing in past and present colonies of burrow-nesting seabirds in New Zealand. I. delta super(15)N in two species of conifer (Podocarpaceae) from a mainland colony of Westland petrels (Procellaria westlandica), Punakaiki, South Island by Holdaway, R N, Hawke, D J, Hyatt, OM, Wood, G C

“…Marine nitrogen (N) has been traced into terrestrial and freshwater food chains at petrel (Aves: Procellariiformes) colonies on the South Island of New…”
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