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Title
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Temporal variability of top-down forces and their role in host choice evolution of phytophagous arthropods
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Author
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Abstract
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| The role of top-down forces in host choice evolution of phytophagous arthropods is the subject of a vividly animated debate. Empirical evidence for the evolutionary role of top-down forces comes from studies showing that phytophagous arthropods prefer hosts that entail enemy-free space. The aim of this paper is to draw the attention of plant-arthropod researchers to the potentially, temporally variable nature of third trophic level effects. We show that this aspect is largely neglected in studies on enemy-free space, despite the fact that relative enemy impact varies seasonally among plants in at least some studies. We conclude that rigorous testing of the enemy-free space hypothesis can only be performed when within and between season variation in higher trophic level effects is taken into account. |
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Language
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English
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Source (journal)
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Oikos: a journal of ecology. - København
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Publication
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København
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2002
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ISSN
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0030-1299
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Volume/pages
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97
:1
(2002)
, p. 139-144
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ISI
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000176022200015
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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