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Biotic Interactions in Arid Lands (Paperback, Softcover reprint of the original 1st ed. 1996)
Loot Price: R2,998
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Biotic Interactions in Arid Lands (Paperback, Softcover reprint of the original 1st ed. 1996)
Series: Adaptations of Desert Organisms
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The exigencies of life in the desert environment have resulted in
the se lection of a diversity of adaptations, both morphological
and physiologi cal, in the flora and fauna. At the same time, many
plants and most small animals are able not merely to exist but even
to thrive under desert conditions - mainly by avoiding thermal
extremes and by the refine ment of pre-existing abilities to
economise in water. In the same way, the biotic interactions of the
flora and fauna of the desert do not involve many new principles.
Nevertheless, conditions in arid regions frequently do invoke
refinements of the complex interrelations between predators and
their prey, parasites and their hosts, as well as between
herbivores and the plants upon which they feed. In this book, I
shall discuss not only such interactions and their feedback
effects, but also community processes and population dynamics in
the desert. The physical conditions of the desert that principally
affect predators and their prey are its openness and the paucity of
cover. This is re stricted to scattered plants, occasional rocks,
holes, and crevices in the ground. Furthermore, nightfall does not
confer relative invisibility, as it does in many other ecobiomes,
because of the clarity of the atmosphere. The bright starlight of
the desert renders nearby objects visible even to the human eye,
while an incandescent moon bathes the empty landscape with a flood
of silver light. Consequently, adaptive coloration is func tional
at all hours of the day and night."
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