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Article: RELATIVE IMPORTANCE OF ABIOTICALLY INDUCED DIRECT AND INDIRECT EFFECTS ON A SALT-MARSH HERBIVORE.
- Article from:
- Ecology
- Article date:
- February 1, 2000
- Author:
CopyrightCOPYRIGHT 2000 Ecological Society of America. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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DANIEL C. MOON [1]
Abstract. Few studies have attempted to determine experimentally the relative importance of direct and indirect effects of host plants on herbivorous insects in the field. This study identifies important direct and indirect effects of a coastal plant on its most common insect herbivore and assesses the relative importance of those effects. The direct effects of increased interstitial soil salinity and nitrogen on the abundance of Pissonotus quadripustulatus (Homoptera: Delphacidae), which feeds on Borrichia frutescens (Asteraceae), are reported. Also reported are the indirect effects of these treatments on parasitism of P. quadripustulatus eggs ...