Bottom-up Forces Mediate Natural-Enemy Impact in a Phytophagous Insect Community
نویسندگان
چکیده
منابع مشابه
Attenuation of Top-down and Bottom-up Forces in a Complex Terrestrial Community
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Recent evidence points to the plant's being a much more limited resource than previously expected. In addition to the restraints on feeding and population growth imposed by such factors as leaf toughness, the physical environment, plant nutrition, etc., recent work points to the role of feeding-induced chemical changes in the leaves in reducing herbivore 'fitness'. This suggests that population...
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Although most ecologists agree that both top-down and bottom-up forces (predation and resource limitation, respectively) act in concert to influence populations of herbivores, it has proven difficult to estimate the relative contributions of such forces in terrestrial systems. Using a combination of time-series analysis of population counts recorded over 16 years and experimental data, we prese...
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ژورنال
عنوان ژورنال: Ecology
سال: 2002
ISSN: 0012-9658
DOI: 10.2307/3071956