Presented by: Kari W, Stenberg College Psychiatric Nursing Student.
Sex-biased predation in dioecious willow - The long reach of plant genes Johan A. Stenberg Md....
-
Upload
adele-johnson -
Category
Documents
-
view
217 -
download
1
Transcript of Sex-biased predation in dioecious willow - The long reach of plant genes Johan A. Stenberg Md....
Sex-biased predation in dioecious willow- The long reach of plant genes
Johan A. Stenberg
Md. Faisal Kabir, Kim Karlsson Moritz & Johan A. Stenberg
Sex-biased insect densities in the field
2011 20130
1
2
3
Male
Female
A.
nem
oru
m d
ensi
ty
20110
0.5
1
1.5
Male
Female
P.
vulg
atis
sim
a d
ensi
ty
Sex-biased predation in the field
Male Female
n = 22 plants n = 22 plants
0hrs 24hrs 48hrs 72hrs 96hrs 120hrs 144hrs0
0.2
0.4
0.6
0.8
1
*
*
Fra
cti
on
su
rviv
ing
eg
gs
Female
Male
Sex-biased predator performance?
Male Female0
5
10
15
20
25
30
A.
nem
oru
m d
evel
op
men
t ti
me
(day
s)
Summary + discussion1. Female plants harbor higher densities of the herbivore
and its omnivorous predator in the field.
2. The herbivore prefers female plants despite high predation pressure on females.
3. The omnivorous predators perform better on male plants.
4. The herbivore probably prefers female plants as the arena for interactions with the predator since female plants are suboptimal for the predator.
Tentative conclusions1. The insects preference for female plants seems to be
adaptive.
2. The extended phenotype of Salix cinerea structures the ecological interactions between herbivores and predators.
Work continues in PhD project
• 30 fields.• 20 male, 20 female genotypes.• Male, female and mixed fields.• Interactions within fields.
• Effects on neighbouring strawberries.
Kim Karlsson Moritz
AcknowledgementsKwabena BaffoeChrister BjörkmanTina BoddumPeter DalinKarin EklundRobert GlinwoodRiitta Julkunen-TiittoFaisal KabirKim Karlsson MoritzSharmin KawsharAnna LehrmanGöran NordlanderColin OriansAmy ParachnowitschJörg StephanMikaela TorpGöran Ågren
The Swedish Research Council Formas The Swedish Research Council VR The Swedish Energy Agency The Royal Swedish Academy of Agriculture and Forestry NL-faculty (SLU) The Foundation in Memory of Oscar and Lili Lamm Carl Trygger Foundation