J
John M. Halley
Researcher at University of Ioannina
Publications - 115
Citations - 5247
John M. Halley is an academic researcher from University of Ioannina. The author has contributed to research in topics: Population & Biodiversity. The author has an hindex of 36, co-authored 106 publications receiving 4580 citations. Previous affiliations of John M. Halley include University College London & Aristotle University of Thessaloniki.
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Ecology, evolution and 1 f -noise
TL;DR: Analysis of data, results of models, and examination of basic 1 f -noise properties suggest that pink 1 < f noise, which lies midway between white noise and the random walk, might be the best null model of environment variation.
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Uses and abuses of fractal methodology in ecology
John M. Halley,Stephen Hartley,Athanasios S. Kallimanis,William E. Kunin,Jack J. Lennon,Stefanos P. Sgardelis +5 more
TL;DR: The value of fractal methods, in particular for applications to spatial ecology, is reviewed, and potential pitfalls are outlined.
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Elephant Seal Genetic Variation and the Use of Simulation Models to Investigate Historical Population Bottlenecks
A. R. Hoelzel,John M. Halley,Stephen J. O'Brien,Claudio Campagna,T. Arnborm,BJ Le Boeuf,Katherine Ralls,Gabriel A. Dover +7 more
TL;DR: DNA sequence diversity in two mtDNA regions was investigated and found low genetic variation in the northern elephant seal: there were only two control region haplotypes (sequence difference = 1%), which was consistent with an extreme founder event in the recent history of the northern species.
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Dispersal of Amazonian birds in continuous and fragmented forest
TL;DR: It is found that species which disappear from fragments move extensively between plots before isolation, but not after, and often disperse to longer distances in continuous forest than in fragmented forest, suggesting tropical forest birds may be better dispersers than assumed with some individuals moving very long distances.
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Effects of Monoterpenoids, Acting Alone or in Pairs, on Seed Germination and Subsequent Seedling Growth
TL;DR: The potential allelopathic activity of 47 monoterpe- noids of different chemical groups is compared, by estimating their effect on seed germination and subsequent growth of Lactuca sativa seedlings, and a model was used to investigate whether compounds acted independently when applied in pairs.