Effects of soil decomposer invertebrates (protozoa and earthworms) on an above-ground phytophagous insect (cereal aphid) mediated through changes in the host plant
Article Abstract:
Research on the aphid Sitobion avenae, its barley host plant, and the presence of soil protozoa and earthworms is examined. Aphid biomass and numbers were significantly increased when protozoa were present; earthworms did not produce this effect. Host plant nitrogen content and biomass were also raised by the presence of protozoa.
Publication Name: Oikos
Subject: Environmental issues
ISSN: 0030-1299
Year: 2001
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Hormpahis hamamelidis and gall size: a test of the plant vigor hypothesis
Article Abstract:
Research is presented on the influence of the aphid Hormaphis hamamelidis on the growth and structure of its host plant Hamamelis virginiana, or witch hazel. Findings tend to contradict plant vigor hypothesis predictions, which are discussed within the framework of gall size and insect manipulation.
Publication Name: Oikos
Subject: Environmental issues
ISSN: 0030-1299
Year: 2001
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Selective gopher disturbance influences plant species effects on nitrogen cycling
Article Abstract:
Plant species effects on ecosystem processes are mediated by traits such as litter quality and exudation. The same traits also influence the activity and distribution of animals that play key roles in regulating ecosystem dynamics.
Publication Name: Oikos
Subject: Environmental issues
ISSN: 0030-1299
Year: 2005
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