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Frugivory and seed dispersal: ecological and evolutionary aspects (Hardcover, Reprinted from VEGETATIO, 107/108, 1993)
Loot Price: R8,549
Discovery Miles 85 490
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Frugivory and seed dispersal: ecological and evolutionary aspects (Hardcover, Reprinted from VEGETATIO, 107/108, 1993)
Series: Advances in Vegetation Science, 15
Expected to ship within 12 - 17 working days
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Any scientific discipline needs a theoretical framework to guide
its development and to sharpen the questions its researchers
pursue. In biology, evolution is the grand theoretical framework,
and an his torical perspective is necessary to understand
present-day biological conditions. In its formative years, the
modern study of the fruit-frugivore mutualism was guided by the
'specialist-generalist' paradigm developed by D. Snow, D. McKey,
and H. Howe. Howe reviews the current status of this evolution ary
paradigm and points out that it has been dismissed by many workers
before being adequately tested. This is because ecologists working
with the tropical plants and frugivorous birds for which the
paradigm was originally developed rarely measure the seed dispersal
effectiveness of different disperser species. He indicates that
this paradigm still has heuristic value and suggests that several
additional ecological paradigms, including the concept ofkeystone
species ofplants and frugivores and the role that frugivores play
in density-dependent mortality in tropical trees, are worth
studying. The concept of seed dispersal quality has been central to
discussions of fruit-frugivore coevolution. Schupp thoroughly
reviews data bearing on this concept, constructs a hierarchical
framework for viewing disperser effectiveness, and points out that
disperser effectiveness depends on both the quantity and quality of
seed dispersal. Effectiveness, in turn, affects both evolutionary
and ecological relationships between dispersers and their food
plants."
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