Recent assembly of the Cerrado, a neotropical plant diversity hotspot, by in situ evolution of adaptations to fire.
The relative importance of local ecological and larger-scale historical processes in causing differences in species richness across the globe remains keenly debated. To gain insight into these questions, we investigated the assembly of plant diversity in the Cerrado in South America, the world'...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2009
|
| _version_ | 1797095654716080128 |
|---|---|
| author | Simon, M Grether, R de Queiroz, L Skema, C Pennington, RT Hughes, C |
| author_facet | Simon, M Grether, R de Queiroz, L Skema, C Pennington, RT Hughes, C |
| author_sort | Simon, M |
| collection | OXFORD |
| description | The relative importance of local ecological and larger-scale historical processes in causing differences in species richness across the globe remains keenly debated. To gain insight into these questions, we investigated the assembly of plant diversity in the Cerrado in South America, the world's most species-rich tropical savanna. Time-calibrated phylogenies suggest that Cerrado lineages started to diversify less than 10 Mya, with most lineages diversifying at 4 Mya or less, coinciding with the rise to dominance of flammable C4 grasses and expansion of the savanna biome worldwide. These plant phylogenies show that Cerrado lineages are strongly associated with adaptations to fire and have sister groups in largely fire-free nearby wet forest, seasonally dry forest, subtropical grassland, or wetland vegetation. These findings imply that the Cerrado formed in situ via recent and frequent adaptive shifts to resist fire, rather than via dispersal of lineages already adapted to fire. The location of the Cerrado surrounded by a diverse array of species-rich biomes, and the apparently modest adaptive barrier posed by fire, are likely to have contributed to its striking species richness. These findings add to growing evidence that the origins and historical assembly of species-rich biomes have been idiosyncratic, driven in large part by unique features of regional- and continental-scale geohistory and that different historical processes can lead to similar levels of modern species richness. |
| first_indexed | 2024-03-07T04:30:57Z |
| format | Journal article |
| id | oxford-uuid:ce4a6a92-c4db-43ee-ae92-8e8b399c5a90 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:30:57Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:ce4a6a92-c4db-43ee-ae92-8e8b399c5a902022-03-27T07:34:40ZRecent assembly of the Cerrado, a neotropical plant diversity hotspot, by in situ evolution of adaptations to fire.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ce4a6a92-c4db-43ee-ae92-8e8b399c5a90EnglishSymplectic Elements at Oxford2009Simon, MGrether, Rde Queiroz, LSkema, CPennington, RTHughes, CThe relative importance of local ecological and larger-scale historical processes in causing differences in species richness across the globe remains keenly debated. To gain insight into these questions, we investigated the assembly of plant diversity in the Cerrado in South America, the world's most species-rich tropical savanna. Time-calibrated phylogenies suggest that Cerrado lineages started to diversify less than 10 Mya, with most lineages diversifying at 4 Mya or less, coinciding with the rise to dominance of flammable C4 grasses and expansion of the savanna biome worldwide. These plant phylogenies show that Cerrado lineages are strongly associated with adaptations to fire and have sister groups in largely fire-free nearby wet forest, seasonally dry forest, subtropical grassland, or wetland vegetation. These findings imply that the Cerrado formed in situ via recent and frequent adaptive shifts to resist fire, rather than via dispersal of lineages already adapted to fire. The location of the Cerrado surrounded by a diverse array of species-rich biomes, and the apparently modest adaptive barrier posed by fire, are likely to have contributed to its striking species richness. These findings add to growing evidence that the origins and historical assembly of species-rich biomes have been idiosyncratic, driven in large part by unique features of regional- and continental-scale geohistory and that different historical processes can lead to similar levels of modern species richness. |
| spellingShingle | Simon, M Grether, R de Queiroz, L Skema, C Pennington, RT Hughes, C Recent assembly of the Cerrado, a neotropical plant diversity hotspot, by in situ evolution of adaptations to fire. |
| title | Recent assembly of the Cerrado, a neotropical plant diversity hotspot, by in situ evolution of adaptations to fire. |
| title_full | Recent assembly of the Cerrado, a neotropical plant diversity hotspot, by in situ evolution of adaptations to fire. |
| title_fullStr | Recent assembly of the Cerrado, a neotropical plant diversity hotspot, by in situ evolution of adaptations to fire. |
| title_full_unstemmed | Recent assembly of the Cerrado, a neotropical plant diversity hotspot, by in situ evolution of adaptations to fire. |
| title_short | Recent assembly of the Cerrado, a neotropical plant diversity hotspot, by in situ evolution of adaptations to fire. |
| title_sort | recent assembly of the cerrado a neotropical plant diversity hotspot by in situ evolution of adaptations to fire |
| work_keys_str_mv | AT simonm recentassemblyofthecerradoaneotropicalplantdiversityhotspotbyinsituevolutionofadaptationstofire AT gretherr recentassemblyofthecerradoaneotropicalplantdiversityhotspotbyinsituevolutionofadaptationstofire AT dequeirozl recentassemblyofthecerradoaneotropicalplantdiversityhotspotbyinsituevolutionofadaptationstofire AT skemac recentassemblyofthecerradoaneotropicalplantdiversityhotspotbyinsituevolutionofadaptationstofire AT penningtonrt recentassemblyofthecerradoaneotropicalplantdiversityhotspotbyinsituevolutionofadaptationstofire AT hughesc recentassemblyofthecerradoaneotropicalplantdiversityhotspotbyinsituevolutionofadaptationstofire |