Get A Less Green and Pleasant Land: Our Threatened Wildlife PDF

By Professor Norman Maclean, Chris Packham

ISBN-10: 1107673232

ISBN-13: 9781107673236

Disentangling the proof from the hype, this 'Domesday booklet' of the British and Irish nation-state bargains a definitive and updated survey of the kingdom of our flora and fauna this present day. Norman Maclean, editor of the bestselling Silent summer time, examines the newest findings of england and Ireland's most sensible flora and fauna specialists and translates them for a much broader viewers. each one bankruptcy offers trustworthy estimates of animal populations, exhibiting which species are thriving and that are in decline. The publication additionally considers the results of weather switch on our natural world and the way human inhabitants development is influencing its improvement. fantastically illustrated with color plates and wooden engravings all through, this obtainable and well timed learn finds simply how swiftly our nation-state and its flora and fauna are altering, why we must always be troubled, and what we will do approximately it.

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Additional info for A Less Green and Pleasant Land: Our Threatened Wildlife

Sample text

Also, as we saw in Chapter 2, Earth’s climate has changed constantly over millions of years without a human component, so looking at present change within a pattern of change is by no means straightforward. Present climate change involves not only global warming but localised increases in the frequency of extreme weather conditions. Glacier retreat One of the most sensitive monitors of world climate and temperature is provided by the growth or retreat of glaciers. Why are glaciers such a good way of measuring climate change?

14 in this time period,4 which, expressed in more dramatic terms, is equivalent to an increase of 30% in the hydrogen ion concentration, which is ‘acidity’. The effects at the sea surface are most apparent outside the tropical belts. 5 Ocean acidification brings many problems for marine life, none more dramatic than the slower growth or death of coral due to reduced calcification or enhanced calcium solution. Some of this effect on coral is a direct result of reduced pH, and some a result of elevated atmospheric CO2 levels.

It is often assumed that production of molecules essential to living metabolism must have occurred on the surfaces of, say, marine rocks or silts, which helped to bring the appropriate molecules together. It remains quite unclear whether early metabolism could have continued on these surfaces or whether enclosure into membranebounded cells was a crucial early step. Also uncertain is whether the evolution of life was a very rare event which occurred by chance only once, or whether it occurred many times over, once the necessary conditions favourable to life existed.

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A Less Green and Pleasant Land: Our Threatened Wildlife by Professor Norman Maclean, Chris Packham


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