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Meta analysis of Impact of elevated CO2 on host - insect herbivore interactions

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Title Meta analysis of Impact of elevated CO2 on host - insect herbivore interactions
Meta analysis of Impact of elevated CO2 on host - insect herbivore interactions
 
Creator NICRA
 
Subject carbon dioxide (CO2 ) versus ambient level of CO2
 
Description Not Available
The possible impacts of elevated CO2
(eCO2
) on growth and development behavior of insect
pests attracted the attention of researchers. Several reviews of such studies were attempted to
draw conclusions on the impact of elevated CO2
on insect pest incidence. These reviews were
mainly qualitative summaries of the studies and the conclusions drawn are not based on any
statistical or quantitative analysis. These reviews were subjective and often based on votecounting method. They did not consider the magnitude of the impact and sample size observed
in the individual studies and in the process the valuable information available in the original
studies is lost. When studies reporting differential impact are included in the review, it becomes
that much more difficult to draw conclusion on the overall impact of the treatment under question.
Hence, the validity of these conclusions remains questionable. It is only possible to draw some
generalizations, which have little statistical validity, and it is also not possible to quantify the
magnitude of the effect of treatment.
Most of the reviews (Coviella and Trumble, 1999; Hunter, 2001; and Srinivasa Rao et al 2006)
attempted to examine the impact of elevated CO2
on insect pest incidence also suffer from the
above mentioned limitations. The summary of qualitative literature survey on the impact of
elevated CO2
on insect pests was documented by earlier reviewers. From such exercises, only
subjective generalizations can be drawn rather than any quantified effect of interest, which has
some statistical validity.
An alternative procedure to deal with the limitations of the qualitative synthesis of studies was
put forward initially by Glass (1976) and came to be known as meta analysis. Quantification of
effect of eCO2
on the incidence of insect pests through statistical synthesis of published results
or meta analysis is attempted here. The purpose of this bulletin is to synthesize the information
on the elevated CO2
– insect pest population relationships and to draw statistically valid
conclusions using meta analysis as a tool.
Not Available
 
Date 2021-07-20T09:42:27Z
2021-07-20T09:42:27Z
2012-08-11
 
Type Technical Report
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/49188
 
Language English
 
Relation Not Available;
 
Publisher NICRA