Trait-based approaches in coral reef ecology: from ...villeger.sebastien.free.fr/R scripts/poster...

Assessingfunc+onaldiversityfromtraitstomul+dimensionalindices

Session46Trait-basedapproachesincoralreefecology:fromfunc8onalecologytomanagement

Whymeasuringfunc4onaldiversity?

Sébas4enVilléger,EvaMaireandDavidMouillotMarinebiodiversitylab,Montpellier,France

Whatisfunc4onaldiversity?Thefacetofbiodiversitythataccountsforthebiologicala1ributesoforganismslinkedtotheirfitnessorecologicalroles,i.e.func4onaltraits

Tutorialandfunc4onsavailableat:

h@p://villeger.sebas+en.free.fr/FD.html

Contact:sebas+en.villeger@cnrs.fr

Yourques4on+Yourexper4se2)Measuringfunc4onaltraits1)Samplingassemblages

EnvironmentAnthropogenicdisturbances

Ecologicalprocesses

Ecosystemservices

Func4onaldiversityoforganisms

Sa Sb … SN

A1

A2

…

ACAssemblages

Species

T1 T2 … TTSaSb…SN

Func4onaltraits

Species

Traitvalues

Presence/absenceNumberofindividualsCoverage/Biomass

Traitmatrix

Assemblagematrix

Speciespool

b)Compu4ngallfunc4onalspacesMul4dimensional

space

SaSb

Sd SN

Sc

PC2

PC1

PC3

Sa Sb … SNSaSb…SN

Euclideanor

Gower’sdistance

Dendrogram

SbSa ScSd SN

UPGMAWard

PCAPCoA

a)Whichfunc8onaltraitsb)Howtomeasurethemc)Howtocodethem

=

Species

SpeciesDistancematrix

3)Buildingafunc4onalspace

a)Compu4ngfunc4onaldistancebetweenallpairsof

species

c)Selec4ngthebestfunc4onalspaceaccordingtoanobjec+vequalitycriteria

(Maireetal.2015,Glob.Ecol.Biogeogr.)

4)Compu4ngcomplementaryfunc4onaldiversityindicesassessingdistribu+onofspecies(andoftheirdominance)inthefunc+onalspaceforeachassemblage(Mouillotetal.2013,TrendsEvol.Ecol.)

5)Compu4ngcomplementaryfunc4onaldissimilarityindicesassessingoverlapinthefunc+onalspacebetweenassemblages(Villégeretal.2013,Glob.Ecol.Biogeogr.)

Speciescoordinates

FRic FEve FDiv

A1

A2

…

ACAssemblages

Indices

Indicesvalues

Diversitymatrix

A1 A2 … ACA1A2…ACAs

semblages

Assemblages

Dissimilarityvalues

Dissimilaritymatrix

Àcouper