Effects of the cultivation of genetically modified Bt crops on nontarget soil organisms - Microbial Ecology in Sustainable Agroecosystems - page 207

Table 8.9 Summary of the Effects of the Cultivation of Bt Crops or Amendment with Bt Protein on Selected Nontarget Lepidopteran and Aquatic
Insect Larvae (continued)

Species/
classification

Bt crop plant/
experimental variable

Organism(s) Study location Protein Effect on organism(s) Source

Decomposition rate,
aquatic invertebrate
abundance, and
community
composition

10 different
invertebrate
taxa

Field Bt and non- Bt maize

tissue in litterbags in
9 streams

Cry1Ab
Cry1Ab +
Cry3Bb1

Minimal effects; most
differences due to
site-to-site variation
and difference in
agricultural practices

Swan et al.
(2009)

Aquatic invertebrate
abundance, diversity,
biomass, and
functional structure

Trichopteran
Amphipod
Snail
Natural
populations
in the field

Laboratory
Field

Laboratory feeding
trials
Benthic cores and
litterbags in 12
streams adjacent to Bt
or non- Bt maize fields

Cry protein
not
specified;
Bt maize
lines
Crow4635
and
Agventure

Lepidostoma liba grew
slower when fed Bt
maize in the lab
No difference in
abundance or
diversity between Bt
and non- Bt fields

Chambers et
al. (2010)

Aquatic invertebrates
(sedge, caddis fly,
crane fly, and an
aquatic isopod)

Lepidostoma
spp.,
Pycnopsyche
cf.
scabripennis,
Tipula
(Nippotipula )
cf.
abdominalis,
Caecidotia
communis

Laboratory Fed leaves of Bt or

non- Bt maize

Cry1Ab
Cry1Ab +
Cry3Bb1

Bt maize negatively
affected growth and
survivorship of crane
fly and C. communis;
effects were more due
to differences in plant
tissue content than
Cry protein

Jensen et al.
(2010)