Ecological Transitions and the Shape of the Decapod Tree of Life

TY - JOUR

T1 - Ecological Transitions and the Shape of the Decapod Tree of Life

AU - Davis, Katie E.

AU - De Grave, Sammy

AU - Delmer, Cyrille

AU - Payne, Alexander R.D.

AU - Mitchell, Steve

AU - Wills, Matthew A.

N1 - Funding Information: K.E.D. was supported by the BBSRC grant [BB/K006754/1] awarded to K.E.D. and M.A.W. and the Leverhulme Trust grant [RPG-2016-201] awarded to K.E.D. C.D. was also supported by the BBSRC grant [RPG-2016-201]. M.A.W. was supported by the JTF grant [61408]. S.M. was supported by a University of Bath PhD studentship and ARDP by a University of York, Department of Biology, undergraduate bursary awarded to K.E.D. Publisher Copyright: © 2022 The Author(s).

PY - 2022/8/1

Y1 - 2022/8/1

N2 - Understanding the processes that shaped the distribution of species richness across the Tree of Life is a central macroevolutionary research agenda. Major ecological innovations, including transitions between habitats, may help to explain the striking asymmetries of diversity that are often observed between sister clades. Here,we test the impact of such transitions on speciation rates across decapod crustaceans, modeling diversification dynamics within a phylogenetic framework. Our results show that, while terrestrial lineages have higher speciation rates than either marine or freshwater lineages, there is no difference between mean speciation rates in marine and freshwater lineages across Decapoda. Partitioning our data by infraorder reveals that those clades with habitat heterogeneity have higher speciation rates in freshwater and terrestrial lineages, with freshwater rates up to 1.5 times faster thanmarine rates, and terrestrial rates approximately four times faster. This averaging out of marine and freshwater speciation rates results from the varying contributions of different clades to average speciation rates. However, with the exception of Caridea, we find no evidence for any causal relationship between habitat and speciation rate. Our results demonstrate that while statistical generalizations about ecological traits and evolutionary rates are valuable, there are many exceptions. Hence, while freshwater and terrestrial lineages typically speciate faster than their marine relatives, there are many atypically slowfreshwater lineages and fastmarine lineages acrossDecapoda. Futurework on diversification patterns will benefit from the inclusion of fossil data, as well as additional ecological factors.

AB - Understanding the processes that shaped the distribution of species richness across the Tree of Life is a central macroevolutionary research agenda. Major ecological innovations, including transitions between habitats, may help to explain the striking asymmetries of diversity that are often observed between sister clades. Here,we test the impact of such transitions on speciation rates across decapod crustaceans, modeling diversification dynamics within a phylogenetic framework. Our results show that, while terrestrial lineages have higher speciation rates than either marine or freshwater lineages, there is no difference between mean speciation rates in marine and freshwater lineages across Decapoda. Partitioning our data by infraorder reveals that those clades with habitat heterogeneity have higher speciation rates in freshwater and terrestrial lineages, with freshwater rates up to 1.5 times faster thanmarine rates, and terrestrial rates approximately four times faster. This averaging out of marine and freshwater speciation rates results from the varying contributions of different clades to average speciation rates. However, with the exception of Caridea, we find no evidence for any causal relationship between habitat and speciation rate. Our results demonstrate that while statistical generalizations about ecological traits and evolutionary rates are valuable, there are many exceptions. Hence, while freshwater and terrestrial lineages typically speciate faster than their marine relatives, there are many atypically slowfreshwater lineages and fastmarine lineages acrossDecapoda. Futurework on diversification patterns will benefit from the inclusion of fossil data, as well as additional ecological factors.

UR - http://www.scopus.com/inward/record.url?scp=85137124761&partnerID=8YFLogxK

U2 - 10.1093/icb/icac052

DO - 10.1093/icb/icac052

M3 - Article

C2 - 35612997

AN - SCOPUS:85137124761

SN - 1540-7063

VL - 62

SP - 332

EP - 344

JO - Integrative and Comparative Biology

JF - Integrative and Comparative Biology

IS - 2

ER -