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Books > Science & Mathematics > Biology, life sciences > Life sciences: general issues > Ecological science, the Biosphere
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Environmental Stress and Behavioural Adaptation (Paperback, Softcover reprint of the original 1st ed. 1985)
Loot Price: R1,521
Discovery Miles 15 210
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Environmental Stress and Behavioural Adaptation (Paperback, Softcover reprint of the original 1st ed. 1985)
Expected to ship within 10 - 15 working days
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It is generally agreed that animal life originated in the sea and
that adaptive radiation subsequently led to the colonisaHon of
other environments - shores and estuaries, streams and lakes, bog,
mountain and desert. In their invasion of these habitats animals
left the equable, relatively stabl.e surroundings of the open sea
and subjected themselves to the rigours of temperature fluctuations
and extremes, a variety of ionic backgrounds, areas of depleted
oxygen or the possibility of aerial exposure and potential
desiccation. The spur for this radiation presumably lay in the
prize of access to unexploited habitats and sources of energy. The
survival of these more adventurous species has depended upon them
evolving mechanisms to protect the integrity of their cellular
constituents. Protoplasm can only exist within physiochemical
limits which are quite narrow for each species. Water activity,
salt and gas concentrations and temperature all have to be
appropriate for enzyme catalysed processes to function properly
within cells. Except in the open sea, environmental conditions
regularly vary outside these limits. To take a familiar example;
humans can only remain conscious (and hence functional) if their
core (Le. deep tissues - brain, heart, liver, etc.) body
temperature is maintained between about 30 and 43 DegreesC.
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