Yes habitatselection dobioticfactors otherspecies

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Unformatted text preview: rature
 Light
 Soil
structure
 Fire
 Moisture,
etc.
 Physical
 factors
 The
cactus
moth
story…..
 Scientific
name:
Cactoblastis
cactorum
(Berg)
 Common
name:
cactus
moth
 Native
(original
actual
range):
Argentina
 Exotic
(original
potential
range):
Australia,
Hawaii,
India,
South
Africa,
 Caribbean,
USA
 Host:
Opuntia
spp.
(Prickly‐pear
cacti)
 Damage:
Complete
plant
destruction
 Dispersal:
larvae
crawl
to
nearby
plants,
adults
fly
(but
don’t
feed)
 Threat:
Nursery
plants,
production
of
fruit,
pads,
dye
production,

 desert
ecosystem,
human
welfare
and
economy
 The
host
plant
 •  Opuntia
spp.
(Platyopuntia:
Cactaceae)
 •  High
protein
and
fiber
content
of
cladodes
 •  88‐91%
water
per
cell/tissue
 Many
benefits:
 Potential
range:

 where
Opuntia
grows
 WHY?
 Living
happily
in
Argentina
 (Actual
range)
 6
 4/17/09
 Fig. 52-6 Potential
range:

 where
Opuntia
grows
 Why
is
species
X
absent
 from
an
area?
 Yes
 Does
dispersal
 limit
its
 distribution?
 Area
inaccessible
 or
insufficient
time
 Does
behavior
 limit
its
 distribution?
 Can
not
cross
the
 Amazonas
 Yes
 Habitat
selection
 Do
biotic
factors
 (other
species)
 limit
its
 distribution?
 Yes
 No
 Predation...
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This note was uploaded on 10/20/2009 for the course BIO G 1102 taught by Professor Walcott during the Spring '08 term at Cornell University (Engineering School).

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