Reconsidering connectivity in the sub-Antarctic.

摘要: Extreme and remote environments provide useful settings to test ideas about the ecological evolutionary drivers of biological diversity. In sub-Antarctic, isolation by geographic, geological glaciological processes has long been thought underpin patterns in region's terrestrial marine Molecular studies using increasingly high-resolution data are, however, challenging this perspective, demonstrating that many taxa disperse among distant sub-Antarctic landmasses. Here, we reconsider connectivity region, identifying which are relatively isolated, well connected, scales across occurs both systems. Although organisms show evidence occasional long-distance, trans-oceanic dispersal, these events often insufficient maintain gene flow region. Species do large distances include active dispersers more sedentary species. Overall, at intra- inter-island highly complex, influenced life-history traits local dynamics such as relative dispersal capacity propagule pressure, natal philopatry, feeding associations, extent human exploitation, past climate cycles, contemporary climate, physical barriers movement. An increasing use molecular data – particularly genomic sets can reveal fine-scale patterns – and effective international collaboration communication facilitates integration from providing fresh insights into driving diversity These offer a platform for assessing ways changing mechanisms, through activity changes wind ocean circulation, may alter biodiversity future.