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Recent Bayesian stable-isotope mixing models are highly sensitive to variation in discrimination factors.
Stable isotopes are now used widely in ecological studies, including diet reconstruction, where quantitative inferences about diet composition are derived from the use of mixing models. Recent… Expand
Thresholds in songbird occurrence in relation to landscape structure.
- M. Betts, G. J. Forbes, A. Diamond
- Geography, Medicine
- Conservation biology : the journal of the Society…
- 1 August 2007
Theory predicts the occurrence of threshold levels of habitat in landscapes, below which ecological processes change abruptly. Simulation models indicate that below critical thresholds, fragmentation… Expand
The importance of spatial autocorrelation, extent and resolution in predicting forest bird occurrence
Abstract Concerns about declines in forest biodiversity underscore the need for accurate estimates of the distribution and abundance of organisms at large scales and at resolutions that are fine… Expand
Seabirds at risk around offshore oil platforms in the north-west Atlantic.
- F. Wiese, W. Montevecchi, G. K. Davoren, F. Huettmann, A. Diamond, J. Linke
- Environmental Science, Medicine
- Marine pollution bulletin
- 1 December 2001
Seabirds aggregate around oil drilling platforms and rigs in above average numbers due to night lighting, flaring, food and other visual cues. Bird mortality has been documented due to impact on the… Expand
Mercury concentrations in seabird tissues from Machias Seal Island, New Brunswick, Canada.
Mercury is a pervasive environmental contaminant, the anthropogenic portion of which is increasing globally, and in northeastern North America in particular. Seabirds frequently are used as… Expand
Conventional and isotopic determinations of shorebird diets at an inland stopover: the importance of invertebrates and Potamogeton pectinatus tubers
We used gut-content and stable-isotope techniques to determine diets of shorebirds staging at a prairie wetland complex. Stable-isotope ratios for carbon (13C/12C) and nitrogen (15N/14N) varied gre...
Time and recruitment costs as currencies in manipulation studies on the costs of reproduction.
Life history theory predicts that parents will have lower Darwinian fitness if they tend clutches that are above or below the size they naturally produce. We experimentally tested for relationships… Expand
Independent effects of fragmentation on forest songbirds: an organism-based approach.
- M. Betts, G. J. Forbes, A. Diamond, P. D. Taylor
- Geography, Medicine
- Ecological applications : a publication of the…
- 1 June 2006
The degree to which spatial patterns influence the dynamics and distribution of populations is a central question in ecology. This question is even more pressing in the context of rapid habitat loss… Expand
BICKNELL'S THRUSHES (CATHARUS BICKNELLI) IN NEW BRUNSWICK CLEAR CUTS: THEIR HABITAT ASSOCIATIONS AND CO-OCCURRENCE WITH SWAINSON'S THRUSHES (CATHARUS USTULATUS)
Abstract We studied the use of regenerating clear cuts in the central highlands of New Brunswick by Bicknell's (Catharus bicknelli) and Swainson's (Catharus ustulatus) thrushes during the 1997… Expand
Total and Methyl Mercury Concentrations in Seabird Feathers and Eggs
Seabirds are used frequently as indicators of mercury contamination in marine ecosystems, but few studies have examined the forms of mercury found in seabird tissues. Here we compare concentrations… Expand