evolution of the thermal niche and its impact on biodiversity patterns in seaweeds
Post on 18-Jul-2015
168 Views
Preview:
TRANSCRIPT
EVOLUTION OF THE THERMAL NICHE AND ITS IMPACT ON BIODIVERSITY PATTERNS
IN SEAWEEDS
Heroen Verbruggen Vanessa Marcelino Lennert Tyberghein Olivier De Clerck
h;p://www.bio-‐oracle.ugent.be
Bio-‐ORACLE Ocean Rasters for Analysis of Climate and Environment
Tyberghein et al. (2012) Global Ecol. Biogeogr. 21: 272-‐281
algal collecLons
environmental datasets:
Bio-‐ORACLE
mulL-‐gene alignment
DNA sequencing
species tree
phylogeneLc inference
algal collecLons
environmental datasets:
Bio-‐ORACLE
mulL-‐gene alignment
DNA sequencing
species tree
phylogeneLc inference
geographic coordinates
accurate idenLficaLons
georeferencing
DNA barcoding
algal collecLons
environmental datasets:
Bio-‐ORACLE
mulL-‐gene alignment
DNA sequencing
species tree
phylogeneLc inference
geographic coordinates
accurate idenLficaLons
environmental affiniLes of species
georeferencing
DNA barcoding
GIS data extracLon
species tree
environmental affiniLes of species
diversificaLon models
Result:
speciaLon-‐exLncLon dynamics
species tree
environmental affiniLes of species
diversificaLon models
Result:
speciaLon-‐exLncLon dynamics
Result:
evoluLonary changes in environmental affiniLes
trait evoluLon models
species tree
environmental affiniLes of species
diversificaLon models
Result:
speciaLon-‐exLncLon dynamics
Result:
evoluLonary changes in environmental affiniLes
Result:
environmental correlates of speciaLon-‐exLncLon
diversificaLon models
trait evoluLon models
SST affiniLes modeled along tree
C1 C2 C3 C4 C5
Verbruggen et al. (2009) Global Ecol. Biogeogr. 18: 393-‐405
Marcelino et al. – unpublished
Halimeda – microhabitat evoluLon
Exposed microhabitat Sheltered microhabitat
Marcelino et al. – unpublished
Microhabitat specializaLon as exaptaLon for macroecological shi`s
sheltered exposed
low
high
Ti;ensor et al. (2010) Nature 466: 1098-‐1107 — Jablonski et al. (2006) Science 314: 102-‐106
The notorious LDG
Decreasing species diversity from tropics to poles
Many, many, MANY explanaLons proposed
EvoluLonary perspecLve: species turnover
Kerswell (2006) Ecology 10: 2479-‐2488
Bimodal laLtudinal diversity pa;ern
Highest diversity in temperate regions
Do the same evoluLonary processes hold?
…but for seaweeds
LDG and diversificaLon
sea surface temperature
diversificaLo
n
diversificaLo
n
cold warm
sea surface temperature
cold warm int. int.
cold int. warm int. cold cold int. warm int. cold
λ = sigmoid ( SST ) λ = hump ( SST )
λ = constant
SST affinity of lineage
Codium – diversificaLon and SST
2,500.8
ΔAIC = 0
diversificaLo
n
Verbruggen et al. – unpublished
AIC
λ = constant λ = hump ( SST )
diversificaLo
n
SST affinity of lineage SST affinity of lineage
Codium – diversificaLon and SST
2,500.8 2,485.1 AIC
ΔAIC = 0 ΔAIC = –15.7
Verbruggen et al. – unpublished
λ = sigmoid ( SST ) λ = constant λ = hump ( SST )
diversificaLo
n
SST affinity of lineage SST affinity of lineage SST affinity of lineage
Codium – diversificaLon and SST
2,500.8 2,482.5 2,485.1 AIC
ΔAIC = 0 ΔAIC = –15.7 ΔAIC = –18.3
Verbruggen et al. – unpublished
λ = constant
λ = hump ( SST )
diversificaLo
n
SST affinity of lineage
Dictyota – diversificaLon and SST
AIC = 1,533.2 ΔAIC = 0
Verbruggen et al. – unpublished
AIC = 1,517.7 ΔAIC = –15.5
EvoluLonary dynamics and the thermal niche
1. Niche shi`s vs. niche conservaLsm
2. Evolvability and the microhabitat
3. DiversificaLon relates to SST
4. DiversificaLon relates to evolvability
PerspecLves • Lp of the iceberg
• scale up: genera > orders (Bryopsidales, Nemaliales, Dictyotales, Fucales, Laurencia complex)
• go wide: genomic & physiological features • postAToLomics
Collectors: Rob Anderson Elizabeth Bandeira John Bolton Francis Bunker Olivier Dargent Laury Dijoux Kya; Dixon Rainbo Dixon
Stefano Draisma Cindy Fernandez Suzanne Fredericq Wilson Freshwater Fred Gurgel John Huisman Lisa Kirkendale Gerry Kra`
Chris Lane Line Le Gall Diane Li;ler Mark Li;ler Lydiane Mapo Frederic Mineur Klaas Pauly Claude Payri
Willem P.v.Reine Craig Schneider Gary Saunders Thomas Sauvage Tom Schils Heather Spalding John West … many others …
Collaborators: Sofie D’hondt Chris Drake Nick Eloot Wiebe Kooistra Frederik Leliaert Diane Li;ler Mark Li;ler Steve LoDuca
Chris Maggs Antoine N'Yeurt FaLma Oliveira Mariana Oliveira Claude Payri Gary Saunders Thomas Sauvage Tom Schils
Satoshi Shimada Thomas Silberfeld Heather Spalding Frederique Steen Ana Tronholm Christophe Viera Brian Wysor Rick Zechman
top related