Record Details

Impact of elevated CO2 on insect herbivore –host interactions.

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title Impact of elevated CO2 on insect herbivore –host interactions.
Impact of elevated CO2 on insect herbivore –host interactions.
 
Creator ICAR_CRIDA
 
Subject limitations , qualitative, synthesis .
 
Description Not Available
An alternative procedure to deal with the limitations of the qualitative synthesis of
studies was put forward and came to be known as ‘meta analysis’. The quantification
of impact of elevated carbon dioxide (eCO2
) on the incidence of insect pests through
statistical synthesis of published results or meta-analysis is attempted here.
Integration of findings of independent studies by calculating the magnitude of
treatment effects i.e., “effect size” is estimated. Data for the meta analysis were
gathered from the published studies (88 articles) in selected journals (28) for
comparing the growth and development of insect herbivores under eCO2
conditions
and compared with ambient CO2
condition. The basic requirements of the each
study were identified as follows The following criteria were identified for each
study: (1) Studies pertaining to elevated CO2 levels. (2) Studies reporting information
on the mean of the parameters along with a measures of variance (standard error,
standard deviation , coefficient of variance and confidence intervals). (3) Studies
that reported the design of experimentation and sample size for all the treatments.
The mean effect sizes for various insect parameters varied significantly. Among
the insect primary parameters consumption (2.94) and duration of insect species
(0.751) were found to be significantly positive under eCO2
and other parameters
like weight (-0.46) and population abundance (-0.05) of species were negative.
Insect performance indices showed positive effect size for approximate digestibility,
AD (1.281) and relative consumption rate, RCR (3.61) and negative with respect
to efficiency of conversion of ingested food, ECI (-3.20), efficiency of conversion
of digested food, ECD (-1.891) and relative growth rate, RGR (-1.072). Meta
analysis of biochemical constituents of host plants indicated that the effect sizes
were found to be negative (Nitrogen) and positive (Carbon and C: N ratio) indicating
a significant variation of constituents under eCO2
condition than ambient CO2
condition. The implications and limitations of meta analysis were discussed.
Not Available
 
Date 2022-01-27T04:50:13Z
2022-01-27T04:50:13Z
2008
 
Type Technical Report
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/69041
 
Language English
 
Relation Not Available;
 
Publisher ICAR_CRIDA