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| Pandemic potential of a strain of influenza A (H1N1): early findings | Science | 2009 | 1.4K |
| Genomic islands: tools of bacterial horizontal gene transfer and evolution | FEMS Microbiology Reviews | 2009 | 564 |
| Human-felid conflict: a review of patterns and priorities worldwide | Oryx | 2009 | 447 |
| A world malaria map: Plasmodium falciparum endemicity in 2007 | PLoS Medicine | 2009 | 436 |
| Evolutionary analysis of the dynamics of viral infectious disease | Nature Reviews Genetics | 2009 | 402 |
| Nutrition, ecology and nutritional ecology: toward an integrated framework | Functional Ecology | 2009 | 398 |
| A comparison of homologous recombination rates in bacteria and archaea | ISME Journal | 2009 | 394 |
| Immune activation by life-shortening Wolbachia and reduced filarial competence in mosquitoes | Science | 2009 | 377 |
| Adaptation of HIV-1 to human leukocyte antigen class I | Nature | 2009 | 361 |
| A quantitative review of heterozygosity-fitness correlations in animal populations | Molecular Ecology | 2009 | 329 |
| Details of insect wing design and deformation enhance aerodynamic function and flight efficiency | Science | 2009 | 316 |
| Behavioral adjustments of African herbivores to predation risk by lions: spatiotemporal variations influence habitat use | Ecology | 2009 | 307 |
| From wild animals to domestic pets, an evolutionary view of domestication | Proceedings of the National Academy of Sciences of the United States of America | 2009 | 295 |
| Spatial organization and territorial behaviour of the European badger Meles meles | Journal of Zoology | 2009 | 282 |
| Campylobacter genotyping to determine the source of human infection | Clinical Infectious Diseases | 2009 | 281 |
| Serotonin mediates behavioral gregarization underlying swarm formation in desert locusts | Science | 2009 | 278 |
| Parental effects in ecology and evolution: mechanisms, processes and implications | Philosophical Transactions of the Royal Society B: Biological Sciences | 2009 | 257 |
| Meningococcal carriage and disease--population biology and evolution | Vaccine | 2009 | 252 |
| Evidence of a large, international network of HCV transmission in HIV-positive men who have sex with men | Gastroenterology | 2009 | 252 |
| Estimating the phylogeny and divergence times of primates using a supermatrix approach | BMC Evolutionary Biology | 2009 | 212 |
| Quorum sensing and the social evolution of bacterial virulence | Current Biology | 2009 | 211 |
| Successful conservation of a threatened Maculinea butterfly | Science | 2009 | 202 |
| Unravelling the evolution of autumn colours: an interdisciplinary approach | Trends in Ecology and Evolution | 2009 | 198 |
| Risk maps of Lassa fever in West Africa | PLoS Neglected Tropical Diseases | 2009 | 189 |
