Determinants of loss of mammal species during the Late Quaternary ‘megafauna’ extinctions: life history and ecology, but not body size
- C. Johnson
- Environmental ScienceProceedings of the Royal Society of London…
- 7 November 2002
This analysis shows two general features of the selectivity of Late Quaternary mammal extinctions in Australia, Eurasia, the Americas and Madagascar that are consistent with extinctions being due to interaction with human populations.
Relationships between Environmental Factors and Pathogenic Vibrios in the Northern Gulf of Mexico
- C. Johnson, A. R. Flowers, D. Grimes
- Environmental ScienceApplied and Environmental Microbiology
- 3 September 2010
Regression analysis indicated that SST had a significant association with vvh and tlh densities in water and oysters, while salinity was significantly related to vibrio densITIES in the water column, and turbidity was a significant predictor of V. parahaemolyticus illness.
Interactions between mammals and ectomycorrhizal fungi.
- C. Johnson
- Environmental ScienceTrends in Ecology & Evolution
- 1 December 1996
Species extinction and the relationship between distribution and abundance
- C. Johnson
- Environmental ScienceNature
- 16 July 1998
It is shown that although the relationship between range size and local abundance is positive for recently evolved species, it is negative for ancient species, which indicates that positive relationships betweenrange size and abundance may be generated during adaptive radiation, but are then gradually reversed as a result of differential extinction.
Variability of Total and Pathogenic Vibrio parahaemolyticus Densities in Northern Gulf of Mexico Water and Oysters
- A. Zimmerman, A. DePaola, D. Grimes
- Environmental ScienceApplied and Environmental Microbiology
- 5 October 2007
ABSTRACT Vibrio parahaemolyticus is indigenous to coastal environments and a frequent cause of seafood-borne gastroenteritis in the United States, primarily due to raw-oyster consumption. Previous…
Causes of extinction of vertebrates during the Holocene of mainland Australia: arrival of the dingo, or human impact?
- C. Johnson, S. Wroe
- Environmental Science, Geography
- 1 September 2003
The arrival of the dingo in mainland Australia is believed to have caused the extinction of three native vertebrates: the thylacine, the Tasmanian devil and the Tasmanian native hen. The dingo is…
Ecological specialization and population size in a biodiversity hotspot: How rare species avoid extinction
- S. Williams, Y. Williams, J. VanDerWal, J. Isaac, L. Shoo, C. Johnson
- Environmental ScienceProceedings of the National Academy of Sciences
- 17 November 2009
It is shown that species with narrow environmental niches and small geographic ranges tend to have high and uniform local abundances, which would tend to help equalize extinction risk for specialists and generalists.
Genetic Relatedness Among tdh+ and trh+Vibrio parahaemolyticus Cultured from Gulf of Mexico Oysters (Crassostrea virginica) and Surrounding Water and Sediment
- C. Johnson, A. R. Flowers, D. Grimes
- BiologyMicrobial Ecology
- 1 April 2009
Repetitive extragenic palindromic PCR and multilocus sequence analysis revealed heterogeneity among 41 Vp containing thermostable direct hemolysin (tdh) and tdh-related hemoly sin (trh) that were isolated from Mississippi coastal environments from October 2006 to April 2007.
Adjustment of offspring sex ratios in relation to the availability of resources for philopatric offspring in the common brushtail possum
- C. Johnson, M. Clinchy, E. Ritchie
- Environmental ScienceProceedings of the Royal Society of London…
- 7 October 2001
It is shown that the availability of den sites predicts the offspring sex ratio in populations of the common brushtail possum, and low per capita availability of dens was correlated with male bias in the sex ratio at birth.
Phylogeny and the selectivity of extinction in Australian marsupials
- C. Johnson, S. Delean, A. Balmford
- Environmental Science, Biology
- 1 May 2002
It is shown that species of Australian marsupials are at higher risk if they belong to genera that are species‐poor, old or phylogenetically distinct, which suggests that while species in small and distinctive genera are at high risk because they are overrepresented in non‐forested habitats and intermediate body size classes, species in old genera may be intrinsically vulnerable to extinction.
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