the allometry of bee tongue lengths - esa2014
DESCRIPTION
Talk at ESA2014TRANSCRIPT
The allometry of bee tongue length and its uses in ecology
Ignasi BartomeusDan CariveauGeetha NayakJoe ZientekRachael Winfree
Tongue length is linked to:
-Extinction risk (Beisjmier et al. 2006, Bommarco et al 2013)
Tongue length is linked to:
-Extinction risk (Beisjmier et al. 2006, Bommarco et al 2013)
-Plant-pollinator network linkage rules (Santamaría and Rodriguez-Gironés 2008)
Tongue length is linked to:
-Extinction risk (Beisjmier et al. 2006, Bommarco et al 2013)
-Plant-pollinator network linkage rules (Santamaría and Rodriguez-Gironés 2008)
-Foraging efficiency (Harder 1886, Balfour et al 2013)
-Pollination efficiency (Rundolf et al In prep)
Tongue length is linked to:
-Extinction risk (Beisjmier et al. 2006, Bommarco et al 2013)
-Plant-pollinator network linkage rules (Santamaría and Rodriguez-Gironés 2008)
-Foraging efficiency (Harder 1886, Balfour et al 2013)
-Pollination efficiency (Rundolf et al In prep)
-Co-evolutionary processes (Borrell 2005)
Tongue length is linked to:
-Extinction risk (Beisjmier et al. 2006, Bommarco et al 2013)
-Plant-pollinator network linkage rules (Santamaría and Rodriguez-Gironés 2008)
-Foraging efficiency (Harder 1886, Balfour et al 2013)
-Pollination efficiency (Rundolf et al In prep)
-Co-evolutionary processes (Borrell 2005)
-Breeding of crops to increase honey bee visitation (Hawkins 1969)
Single species:
(e.g. Aizen et al 2008)
Bombus dahlbomii Bombus terrestris
Single species:
Community ecology: ...
(e.g. Aizen et al 2008)
phylogeny
Colletes Amegilla Megachile Augchlora
allometry
Julian Huxley (1936)
log-body mass
log-
met
abol
ic ra
te
body mass
spec
ies tr
ait
species trait = a*body massb
(slope in log-log!)proportionality coefficient
scaling exponent
allometry
Joe Zientek
Let’s measure tongues, then!
Geetha Nayak
Thorax
795 specimens108 species27 genus5 families
Glossa
head
Thorax
795 specimens108 species27 genus5 families
Glossa
head
Cane 1987
Analysis:
Tongue length = (a+Family)*body sizeb
Analysis:
Tongue length = (a+Family)*body sizeb
- Tested IT and head width independently as size measure. - Tested non linearities on this variables.- Tested each term importance.- Tested for both intercept and slope changes - Best model selected using AIC comparisons
Best model include both IT + Family
Apidae
log -
log
- Tongue length = (a+Family)*ITb
Megachilidae
Best model include both IT + Family
log -
log
-
Halictidae
Best model include both IT + Family
log -
log
-
Colletidae
Best model include both IT + Family
log -
log
-
Andrenidae
Best model include both IT + Family
R2 = 0.90
log -
log
-
Allometry can be calculated on dry body size
Bombus
A tool for community ecology
Apidae
Maybe the interest is in the residuals?
Is short and long tongue families a good proxy?
Is short and long tongue families a good proxy?
R2 < 0.10
What about intra-specific relationships?
Tongue length = (a+Sex)*ITb
What about intra-specific relationships? Genus_species n R^2 Bombus griseocollis 67 0.411 Bombus bimaculatus 54 0.536 Xylocopa virginica 40 0.009 (ns)
Ceratina ssp. 34 0.649 Colletes inaequalis 33 0.155 Habropoda laboriosa 32 0.195 Bombus impatiens 29 0.768 Halictus ligatus 29 0.345 Megachile mendica 28 0.689 Melissodes denticulata 24 0.421 Hoplitis pilosifrons 23 0.792 Augochlora pura 21 0.259 Lasioglossum versatum 19 0.080 (ns) Bombus perplexus 17 0.580 Agapostemon virescens 16 0.221
Interesting to understand why variation in tongue length and body size is decoupled at the individual level
6 out of 15 species R2>0.5
(Peat et al. 2005)
www.bartomeuslab.com
https://github.com/ibartomeus/BeeITWant to use the equation (R code):
Want to know more on how to measure tongues?Talk with Joe at his Poster (227) Friday morning.
Thanks!There will be a pollination Bee happy hour
(17:30) at DeVere's Irish Pub located at 1521 L St. Join us!