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Full-Text Articles in Life Sciences
Somatic Mutation And The Antarctic Ozone Hole, L. J. Clarke, Sharon A. Robinson, D. J. Ayre
Somatic Mutation And The Antarctic Ozone Hole, L. J. Clarke, Sharon A. Robinson, D. J. Ayre
Faculty of Science - Papers (Archive)
1 Previous studies of Antarctic clonal moss populations using RAPD markers have reported extraordinarily high levels of genetic variation. This has been claimed to reflect somatic mutation, possibly resulting from elevated UV-B radiation. 2 Our study used microsatellite markers to compare the genetic variation present within continental Antarctic, sub-Antarctic and temperate populations of the moss Ceratodon purpureus. 3 In contrast to the RAPD studies, microsatellite data revealed that C. purpureus populations from continental Antarctica display less intra-population genetic diversity than populations from a range of temperate and sub-Antarctic sites. 4 Analysis of Molecular Variation (AMOVA) revealed that populations within the …
Coastal Systems And Low-Lying Areas, R. J. Nicholls, P. P. Wong, V. Burkett, J. Codignotto, J. Hay, R. Mclean, S. Ragoonaden, C. D. Woodroffe, P. A. O. Abuodha, J. Arblaster, B. Brown, D. Forbes, J. Hall, S. Kovats, J. Lowe, K. Mcinnes, S. Moser, S. Rupp-Armstrong, Y. Saito
Coastal Systems And Low-Lying Areas, R. J. Nicholls, P. P. Wong, V. Burkett, J. Codignotto, J. Hay, R. Mclean, S. Ragoonaden, C. D. Woodroffe, P. A. O. Abuodha, J. Arblaster, B. Brown, D. Forbes, J. Hall, S. Kovats, J. Lowe, K. Mcinnes, S. Moser, S. Rupp-Armstrong, Y. Saito
Faculty of Science - Papers (Archive)
Since the IPCC Third Assessment Report (TAR), our understanding of the implications of climate change for coastal systems and low-lying areas (henceforth referred to as ‘coasts’) has increased substantially and six important policy-relevant messages have emerged. Coasts are experiencing the adverse consequences of hazards related to climate and sea level (very high confidence). Coasts are highly vulnerable to extreme events, such as storms, which impose substantial costs on coastal societies [6.2.1, 6.2.2, 6.5.2]. Annually, about 120 million people are exposed to tropical cyclone hazards, which killed 250,000 people from 1980 to 2000 [6.5.2]. Through the 20th century, global rise of …
Some Like It Wet – Biological Characteristics Underpinning Tolerance Of Extreme Water Stress Events In Antarctic Bryophytes., J. Wasley, Sharon A. Robinson, C. E. Lovelock, M. Popp
Some Like It Wet – Biological Characteristics Underpinning Tolerance Of Extreme Water Stress Events In Antarctic Bryophytes., J. Wasley, Sharon A. Robinson, C. E. Lovelock, M. Popp
Faculty of Science - Papers (Archive)
Antarctic bryophyte communities presently tolerate physiological extremes in water availability, surviving both desiccation and submergence events. This study investigated the relative ability of three Antarctic moss species to tolerate physiological extremes in water availability and identified physiological, morphological, and biochemical characteristics that assist species performance under such conditions. Tolerance of desiccation and submergence was investigated using chlorophyll fluorescence during a series of field- and laboratory-based water stress events. Turf water retention and degree of natural habitat submergence were determined from gametophyte shoot size and density and ?13C signatures respectively. Finally, compounds likely to assist membrane structure and function during desiccation …
Living On The Edge-Plants And Global Change In Continental And Maritime Antarctica, Sharon A. Robinson, J. Wasley, A. K. Tobin
Living On The Edge-Plants And Global Change In Continental And Maritime Antarctica, Sharon A. Robinson, J. Wasley, A. K. Tobin
Faculty of Science - Papers (Archive)
Antarctic terrestrial ecosystems experience some of the most extreme growth conditions on Earth and are characterised by extreme aridity and sub-zero temperatures. Antarctic vegetation is therefore at the physiological limits of survival and, as a consequence, even slight changes to growth conditions are likely to have a large impact, rendering Antarctic terrestrial communities sensitive to climate change. Climate change is predicted to affect the high latitude regions first and most severely. In recent decades, the Antarctic has undergone significant environmental change, including the largest increases in ultraviolet B (UV-B; 290-320nm) radiation levels in the world and, in the maritime region …