Second, we have a dedicated editorial board with wide expertise, and this ensures that submitted papers receive top-quality reviewing. The worldwide representation of the Associate Editors and members of the Editorial Board engenders a truly international perspective for MOM. In the name change from OMI to MOM we have encountered an unfortunate ruling issue surrounding the impact factor (IF) calculations. Because the transition was viewed as being relatively minor, we were allowed to retain the OMI IF of 2.3 for 2010. However, IF calculations are based upon an average of the previous 2 years, and as OMI was closed off in 2010 there is zero contribution to the OMI IF calculation Tipifarnib in vitro for 2011. The IF will therefore be halved for 2011, but in 2012 it will be calculated based upon 2 years of MOM papers. We hope that this temporary hiccup in IF will not deter authors from submitting papers this year. We have some excellent citation rates already for MOM papers in 2010, so if authors continue to send their best work to MOM the IF returned for the Journal in 2012 will be higher than it ever was previously. Finally, we would like to acknowledge with much appreciation the major efforts put into the development of MOM by Katrine F. Christensen (Wiley-Blackwell Journals Manager), and by Claire Ancell (Production Manager). This year we welcome Genevieve Ng, replacing Claire, and Anne Nixon (Editorial Assistant), who will provide administrative duties to keep the submission and reviewing processes running smoothly. “”We are now beginning to understand the role of intraspecific diversity on fundamental ecological phenomena. There exists a paucity of knowledge, however, regarding how intraspecific, or genetic diversity, may covary with other important factors such as propagule pressure. A combination of theoretical modelling and experimentation was used to explore the way propagule pressure and genetic richness may interact. We compare colonization rates of the Australian bivalve Saccostrea glomerata (Gould 1885). We cross propagule size and genetic richness in a factorial design in order to examine the generalities of our theoretical model. Modelling showed that diversity and propagule pressure should generally interact synergistically when positive feedbacks occur (e.g. aggregation). The strength of genotype effects depended on propagule size, or the numerical abundance of arriving individuals. When propagule size was very small (<4 individuals), however, greater genetic richness unexpectedly reduced colonization. The probability of S. glomerata colonization was 76% in genetically rich, larger propagules, almost 39 percentage points higher than in genetically poor propagules of similar size. This pattern was not observed in less dense, smaller propagules. We predict that density-dependent interactions between larvae in the water column may explain this pattern.