Green policies for defence spending

Article Abstract:

Plants use spines and stinging hairs, as well as chemical and biological deterrents to protect themselves from aggressive herbivores. Schmidt and colleagues have studied squirrels fed with seed spiked with toxins to determine whether complementarity occurs. Squirrels were found to neglect the oxalate-impregnated seeds more than those impregnated with tannin. However if the tannin supply was augmented, fewer oxalate-treated seeds were left, showing that complementarity is occurring.

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Balancing the Earth's accounts

Article Abstract:

It can be argued that the cost of conserving the Earth's biodiversity would be less than a quarter of the amount governments currently devote to environmentally damaging subsidies. Governments and foreign donors spend only $6 billion a year on nature reserves, while subsidies consume an estimated $1 trillion a year. It is estimated that adequate funding for protected areas would cost only an additional $2.3 billion a year.

Economic aspects, Environmental policy, Biological diversity conservation, Biodiversity conservation

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Rarity as double jeopardy

Article Abstract:

Low local abundances and small geographical ranges increase the risk of extinction faced by species. The link between local abundance and geographical distribution means that species will face a double jeopardy, with regard to risk of extinction. Johnson has provided an demonstration of the double jeopardy in recently evolved species, showing a positive relationship between local abundance and geographical spread.

Research, Portrayals, Endangered species, Double jeopardy

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