NDLI: Seasonality of herbivory and communication between individuals of sagebrush

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Arthropod-Plant Interactions : Volume 2, Issue 1, March 2008

Arthropod-Plant Interactions : Volume 1

Seasonality of herbivory and communication between individuals of sagebrush

Content Provider	Springer Nature Link
Author	Shiojiri, Kaori Karban, Richard
Copyright Year	2008
Abstract	Seasonal changes in herbivore numbers and in plant defenses are well known to influence plant–herbivore interactions. Some plant defenses are induced in response to herbivore attack or cues correlated with risk of attack although seasonal variation in these defenses is relatively poorly known. We previously reported that sagebrush becomes more resistant to its herbivores when neighboring plants have been experimentally clipped with scissors. In this study we asked whether herbivory to leaves of sagebrush varied seasonally and whether there was seasonal variation in natural levels of damage when neighbors were clipped. We found that sagebrush accumulated most chewing damage early in the season, soon after the spring flush of new leaves. This damage was caused by generalist grasshoppers, deer, specialist caterpillars, beetles, gall makers, and other less common herbivores. Sagebrush showed no evidence of preferentially abscising leaves that had been experimentally clipped. Experimental clipping by Trirhabda pilosa beetle larvae caused neighbors to accumulate less herbivore damage later that season, similar to results in which clipping was done with scissors. Induced resistance caused by experimentally clipping a neighbor was affected by season; plants with neighbors clipped in May accumulated less damage throughout the season relative to plants with unclipped neighbors or neighbors clipped later in the summer. We found a correlation between seasonal herbivore pressure, damage accumulated by plants, and induced responses to experimentally clipping neighbors. The causal mechanisms responsible for this correlation are unknown although a strong seasonal effect was clear.
Starting Page	87
Ending Page	92
Page Count	6
File Format	PDF
ISSN	18728855
Journal	Arthropod-Plant Interactions
Volume Number	2
Issue Number	2
e-ISSN	18728847
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-04-23
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Plant behavior Plant defense Phenology Artificial damage Induced resistance Plant Pathology Behavioural Sciences Ecology Plant Sciences Invertebrates Entomology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics Insect Science Agronomy and Crop Science

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