Low variability in a Y-linked plant gene and its implications for Y-chromosome evolution
Article Abstract:
An investigation of DNA diversity and divergence in SLX-1 and SLY-1, an X- and Y-linked gene pair of the plant Silene latifolia, indicates that DNA polymorphism in SLY-1 is 20-fold lower than in SLX-1. However, the pattern of polymorphism does not indicate a selective sweep. The coding regions of SLX-1 and SLY-1 have very similar sequences, which could suggest that they are situated in the recombining pseudo-autosomal region of the sex chromosomes. There are 54 fixed nucleotide differences and no shared polymorphic sites between SLX-1 and SLY-1.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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Relative impacts of human-induced climate change and natural climate variability
Article Abstract:
The majority of climate change impact studies simulate an environmental indicator under current climate and a prediction of climate change. The methodology has been extended by looking at the effects on impact indicators, of uncertainties in the baseline climate and climate-change signal. Multi-century simulations of unforced climate were achieved using ensemble scenario simulations. Simulated climate-change impacts can thus be interpreted in a probabilistic framework based on signal-to-noise ratios.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Climate variability and North Sea cod
Article Abstract:
The stock of North Sea cod is under threat due to overfishing. It is also shown that there is a fall in production of young cod, paralleling the warming of the North Sea during the past 10 years. This could endanger the long-term sustainability of cod in the North Sea, so fishing pressure must be reduced.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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