How does Evolutionary Distinctiveness change when we place fossils in the tree?

Graeme T. Lloyd@GraemeTLloyd

EDGE species

Evol

ution

ary

Disti

nctiv

enes

s

Extinction RiskIsaac et al. 2007

EDGE species

Evol

ution

ary

Disti

nctiv

enes

s

Extinction Risk

EDGE

Isaac et al. 2007

Evolutionary Distinctiveness

Isaac et al. 2007

012345Time (Ma)

Evolutionary Distinctiveness

Isaac et al. 2007

012345Time (Ma)

3

5

1

1

1

1

1

1Branch Duration

Evolutionary Distinctiveness

Isaac et al. 2007

012345Time (Ma)

4

1

2

2

1

1

1

1N Descendants

Evolutionary Distinctiveness

Isaac et al. 2007

012345Time (Ma)

3 / 4

5 / 1

1 / 2

1 / 2

1 / 1

1 / 1

1 / 1

1 / 1Branch Duration / N Descendants

Evolutionary Distinctiveness

Isaac et al. 2007

012345Time (Ma)

0.75

5

0.5

0.5

1

1

1

1ED

Evolutionary Distinctiveness

Isaac et al. 2007

012345Time (Ma)

0.75 +

5 =

0.5 +

0.5 +

1 =

1 =

1 =

1 =2.25

2.25

2.25

2.25

5

ED

Evolutionary Distinctiveness

012345Time (Ma)

0.75 +

5 =

0.5 +

0.5 +

1 =

1 =

1 =

1 =2.25

2.25

2.25

2.25

5

ED

Isaac et al. 2007

?

Case study

Tree without fossils

Oaks 2011

ED without fossils

ED without fossils

Alligator sinensis

Tree with fossils

Change in EDDe

crea

se in

ED

Incr

ease

in E

D

ED with fossils

ED with fossils

Gavialis gangeticus

Tomistoma schlegelii