CiteULike

Delicious

Connotea

Citation for Study 21602

Citation title: "Grass diversification in Madagascar: in situ radiation of two large C3 shade clades and support for a Miocene to Pliocene origin of C4 grassy biomes".

Study name: "Grass diversification in Madagascar: in situ radiation of two large C3 shade clades and support for a Miocene to Pliocene origin of C4 grassy biomes".

This study is part of submission 21602 (Status: Published).

Citation

Hackel J., Vorontsova M.S., Nanjarisoa O.P., Hall R.C., Razanatsoa J., Malakasi P., & Besnard G. 2018. Grass diversification in Madagascar: in situ radiation of two large C3 shade clades and support for a Miocene to Pliocene origin of C4 grassy biomes. Journal of Biogeography, .

Authors

• Hackel J.
• Vorontsova M.S. +44(0)208 332 5261
• Nanjarisoa O.P.
• Hall R.C.
• Razanatsoa J.
• Malakasi P.
• Besnard G. 0 (+33) 5 61 55 85 45

Abstract

Aim Grasses (Poaceae) are found in all major habitats of Madagascar and have a particular importance in C4 grasslands, whose origins are controversial. We aimed to estimate the number, age and origins of endemic grass lineages in the Madagascar region, and to compare the diversification of C3 and C4 taxa. Location Madagascar and the surrounding Indian Ocean islands, integrated within a global dataset. Methods We estimated 11 time-calibrated molecular phylogenies including 73% of Madagascar's known grass flora (65% of endemics), using two calibration scenarios. Integrating the available sequences from worldwide grass species, a total of 1928 accessions were analysed. We tested range evolution models, estimated ancestral ranges, and compared the patterns of lineage accumulation between endemic C3 and C4 grasses. Results We recovered 69 lineages endemic to or with an estimated origin in the Madagascar region, 25 of them C3 and 44 C4. Range evolution analysis suggests widespread distance-scaling of dispersal and strongest historical links to Africa. Extant grass diversity largely accumulated since the Miocene, with parallel increases in C3 and C4 taxa. Two large C3 groups in the ?Forest shade clade? (Paniceae: Boivinellinae) and the bamboos (subtribe Hickeliinae) have an estimated origin in the Madagascar region. Divergences and crown ages of endemic C4 lineages largely coincide with the Miocene grassland expansion. Main conclusions Madagascar's extant grass flora is the result of multiple overseas dispersals, predominantly from Africa, and diversified from the Miocene onwards. C3 grasses are characterised by two large presumed in situ radiations of shade grasses in the Paniceae and bamboos. Endemic C4 lineages result from twice as many immigration events, resulting in smaller clades. Ages of C4 lineages are consistent with a Pliocene or Late Miocene origin of grasslands in Madagascar, but estimating the nature and expanse of such early grasslands will require further research.

Keywords

Poaceae, Madagascar, Mascarenes, dispersal, diversification, C4 grasslands, ancestral range estimation, Boivinellinae, Hickeliinae

External links

• DOI: 10.1111/jbi.13147

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S21602
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref27648,
  	 author = {Jan  Hackel and Maria Sergeevna Vorontsova and Olinirina P Nanjarisoa and Russell C. Hall and Jacqueline  Razanatsoa and Panagiota  Malakasi and Guillaume  Besnard},
  	 title = {Grass diversification in Madagascar: in situ radiation of two large C3 shade clades and support for a Miocene to Pliocene origin of C4 grassy biomes},
  	 year = {2018},
  	 keywords = {Poaceae, Madagascar, Mascarenes, dispersal, diversification, C4 grasslands, ancestral range estimation, Boivinellinae, Hickeliinae},
  	 doi = {10.1111/jbi.13147},
  	 url = {http://},
  	 pmid = {},
  	 journal = {Journal of Biogeography},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {Aim
  Grasses (Poaceae) are found in all major habitats of Madagascar and have a particular importance in C4 grasslands, whose origins are controversial. We aimed to estimate the number, age and origins of endemic grass lineages in the Madagascar region, and to compare the diversification of C3 and C4 taxa.
  Location
  Madagascar and the surrounding Indian Ocean islands, integrated within a global dataset.
  Methods
  We estimated 11 time-calibrated molecular phylogenies including 73% of Madagascar's known grass flora (65% of endemics), using two calibration scenarios. Integrating the available sequences from worldwide grass species, a total of 1928 accessions were analysed. We tested range evolution models, estimated ancestral ranges, and compared the patterns of lineage accumulation between endemic C3 and C4 grasses.
  Results
  We recovered 69 lineages endemic to or with an estimated origin in the Madagascar region, 25 of them C3 and 44 C4. Range evolution analysis suggests widespread distance-scaling of dispersal and strongest historical links to Africa. Extant grass diversity largely accumulated since the Miocene, with parallel increases in C3 and C4 taxa. Two large C3 groups in the ?Forest shade clade? (Paniceae: Boivinellinae) and the bamboos (subtribe Hickeliinae) have an estimated origin in the Madagascar region. Divergences and crown ages of endemic C4  lineages largely coincide with the Miocene grassland expansion.
  Main conclusions
  Madagascar's extant grass flora is the result of multiple overseas dispersals, predominantly from Africa, and diversified from the Miocene onwards. C3 grasses are characterised by two large presumed in situ radiations of shade grasses in the Paniceae and bamboos. Endemic C4 lineages result from twice as many immigration events, resulting in smaller clades. Ages of C4 lineages are consistent with a Pliocene or Late Miocene origin of grasslands in Madagascar, but estimating the nature and expanse of such early grasslands will require further research.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 27648
  AU  - Hackel,Jan 
  AU  - Vorontsova,Maria Sergeevna
  AU  - Nanjarisoa,Olinirina P
  AU  - Hall,Russell C.
  AU  - Razanatsoa,Jacqueline 
  AU  - Malakasi,Panagiota 
  AU  - Besnard,Guillaume 
  T1  - Grass diversification in Madagascar: in situ radiation of two large C3 shade clades and support for a Miocene to Pliocene origin of C4 grassy biomes
  PY  - 2018
  KW  - Poaceae
  KW  - Madagascar
  KW  - Mascarenes
  KW  - dispersal
  KW  - diversification
  KW  - C4 grasslands
  KW  - ancestral range estimation
  KW  - Boivinellinae
  KW  - Hickeliinae
  UR  - http://dx.doi.org/10.1111/jbi.13147
  N2  - Aim
  Grasses (Poaceae) are found in all major habitats of Madagascar and have a particular importance in C4 grasslands, whose origins are controversial. We aimed to estimate the number, age and origins of endemic grass lineages in the Madagascar region, and to compare the diversification of C3 and C4 taxa.
  Location
  Madagascar and the surrounding Indian Ocean islands, integrated within a global dataset.
  Methods
  We estimated 11 time-calibrated molecular phylogenies including 73% of Madagascar's known grass flora (65% of endemics), using two calibration scenarios. Integrating the available sequences from worldwide grass species, a total of 1928 accessions were analysed. We tested range evolution models, estimated ancestral ranges, and compared the patterns of lineage accumulation between endemic C3 and C4 grasses.
  Results
  We recovered 69 lineages endemic to or with an estimated origin in the Madagascar region, 25 of them C3 and 44 C4. Range evolution analysis suggests widespread distance-scaling of dispersal and strongest historical links to Africa. Extant grass diversity largely accumulated since the Miocene, with parallel increases in C3 and C4 taxa. Two large C3 groups in the ?Forest shade clade? (Paniceae: Boivinellinae) and the bamboos (subtribe Hickeliinae) have an estimated origin in the Madagascar region. Divergences and crown ages of endemic C4  lineages largely coincide with the Miocene grassland expansion.
  Main conclusions
  Madagascar's extant grass flora is the result of multiple overseas dispersals, predominantly from Africa, and diversified from the Miocene onwards. C3 grasses are characterised by two large presumed in situ radiations of shade grasses in the Paniceae and bamboos. Endemic C4 lineages result from twice as many immigration events, resulting in smaller clades. Ages of C4 lineages are consistent with a Pliocene or Late Miocene origin of grasslands in Madagascar, but estimating the nature and expanse of such early grasslands will require further research.
  L3  - 10.1111/jbi.13147
  JF  - Journal of Biogeography
  VL  - 
  IS  - 
  ER  -