NDLI: The maintenance of intraspecific biodiversity: the interplay of selection on resource use and on natural enemy resistance in the pea aphid

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The maintenance of intraspecific biodiversity: the interplay of selection on resource use and on natural enemy resistance in the pea aphid

Content Provider	Springer Nature Link
Author	Ferrari, Julia Godfray, H. Charles J.
Copyright Year	2005
Abstract	Biodiversity has both intraspecific and interspecific components, and speciation is the process through which the former is converted to the latter. Ecological factors can cause population divergence and differentiation. In this paper, we investigate the interplay between top-down effects from natural enemies and bottom-up effects from host plants in an aphid model system. Pea aphids, Acyrthosiphon pisum, are known to form host-adapted races on Trifolium and Medicago. Here, replicate clones of pea aphids collected from a broader set of five host plant genera are screened for their performance on the same set of host plants and also for their resistance to four natural enemies: the parasitoids Aphidius eadyi and Aphidius ervi, and the entomopathogenic fungi Pandora (=Erynia) neoaphidis and Zoophthora phalloides. The populations showed clear adaptation to their host plant from which they were collected, but they also performed well on Vicia. Performance on the other three plant species was poor. The aphid population collected from Lotus was significantly better at defending itself against the parasitoid A. eadyi, and there was a tendency for the clones from Trifolium to be resistant to the pathogen P. neoaphidis. These patterns highlight the importance of understanding the ecological processes influencing speciation in the context of the web of ecological adaptations within which a species is embedded.
Starting Page	9
Ending Page	16
Page Count	8
File Format	PDF
ISSN	09123814
Journal	Ecological Research
Volume Number	21
Issue Number	1
e-ISSN	14401703
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-11-15
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Genetic variation Host use Intraspecific biodiversity Resistance to natural enemies Pea aphid
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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