ORCID Profile
0000-0003-0050-2089
Current Organisation
Queen's University
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Publisher: Wiley
Date: 08-2009
DOI: 10.1890/07-1852.1
Abstract: Ecological linkages between species ersity in communities and genetic ersity in populations have potential to influence the assembly of communities in habitats recovering from human disturbance, but few studies have attempted to synthesize relationships between these levels of biological organization, especially for locally adapted species. No such studies have been done in freshwater ecosystems despite the plethora of environmental stressors plaguing aquatic communities around the world. We present the first study to test (1) whether ersity and dissimilarity among communities and populations of a locally adapted species are correlated and (2) whether communities and population haplotypes respond differently to environmental selection and spatial structure of habitats. We used a fragment of mitochondrial DNA (mtDNA) belonging to the gene cytochrome oxidase subunit I (COI) as a neutral tag to discriminate among different population haplotype variants. In boreal lakes with different histories of exposure to anthropogenic acidification, ersity and dissimilarity metrics for crustacean zooplankton communities and locally adapted populations of an abundant and broadly distributed calanoid copepod species, Leptodiaptomus minutus, did not correlate. This discord was likely because zooplankton communities responded more strongly to acidity and acidity-related environmental variables than spatial structure of lakes, whereas the distribution of L. minutus haplotypes was more strongly governed by spatial structure of lakes than environmental selection. Although spatial structure was the dominant driver of haplotype structure among L. minutus lake populations, there were similarities in the types of environmental variables that influenced the distributions of species in communities and haplotypes in populations. How haplotype ersity among populations relates to community ersity depends on the relative influence of spatial structure of habitats and selection at each of these scales of biological organization.
Publisher: Wilson Ornithological Society
Date: 06-2009
DOI: 10.1676/08-058.1
Publisher: Wilson Ornithological Society
Date: 09-2003
DOI: 10.1676/02-099
Publisher: Oxford University Press (OUP)
Date: 18-08-2004
Publisher: Canadian Science Publishing
Date: 12-2003
DOI: 10.1139/Z03-198
Abstract: Molecular techniques have allowed researchers studying mating systems to determine the identity of extra-pair sires, providing more accurate measures of in idual realized reproductive success. Yet, an existing problem in such studies is the inability to assign paternity to in iduals that have not been captured. This frequently arises when only a proportion of the population is s led or when visitors from outside the study area have access to the breeding population. It is therefore difficult to assign paternity in situations where not all candidate sires are s led because some assignments may be incorrect, especially when using a likelihood-based approach. This study outlines a method that combines two different programs, GERUD 1.0 and CERVUS 2.0, to increase confidence in paternity assignment. The benefit of using these programs in conjunction is that GERUD 1.0 can reconstruct genotypes of males that are not s led in families where the female was s led, and CERVUS 2.0 can use this information to better assign paternity because more information is provided. We show how applying this method to Least Flycatchers (Empidonax minimus), a sub-oscine bird with an open mating system, substantially increases confidence in paternity assignments.
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Peter Boag.