Effects of the cultivation of genetically modified Bt crops on nontarget soil organisms - Microbial Ecology in Sustainable Agroecosystems - page 188

Table 8.6 Effects of the Cultivation of Bt Crops or Amendment with Bt Protein on Nematodes (continued)

Organism/activity
tested

Bt crop plant/
experimental variable

Methodology Study location Protein Effect on organism(s) Source

Natural populations Assessed general

composition,
trophic
structure, and
biodiversity

Field Cultivation of Bt

( Event 176) and
non- Bt maize

Cry1Ab No effect on nematode

communities or
biodiversity between
soils planted with Bt
and non- Bt maize;
however, fungal
feeders were more
numerous in the Bt
maize soil

Manachini
and Lozzia
(2002)

C. elegans Nematodes

extracted using a
centrifugal-
flotation method

Field Cultivation of Bt and

non- Bt maize

Cry3Bb1 No negative effects on

nematode numbers in
soil with Bt maize
compared with
non- Bt maize

Al-Deeb et
al. (2003)

C. elegans Soil extraction Field Cultivation of Bt and

non- Bt maize

Cry1Ab Lower C. elegans

abundance in soils
with Bt maize than
with non- Bt maize

Manachini
and Lozzia
(2003)

Natural populations Soil extraction Field Cultivation of Bt and

non- Bt eggplant

Cry3Bb1 No effect on nematode

community structure

Manachini et
al. (2003)

Natural populations Soil extraction Field Cultivation of Bt and

non- Bt canola

Cry1Ac A distinct shift in

nematode community
structure with Bt
canola when
compared to non- Bt
isoline

Manachini et
al. (2004)

Natural populations Whitehead and

Hemming tray
technique

Field Cultivation of Bt

(Event MON810) and
non- Bt maize

Cry1Ab Significantly lower

abundance in soils
with Bt maize than
with non- Bt maize

Griffiths et
al. (2005)

(continued)