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Citation for Study 22664

Citation title: "Inferring the origins of Brazil?s Seasonally Dry Tropical Forest through the biogeography of succulent spurges (Euphorbia sect. Brasilienses)".

Study name: "Inferring the origins of Brazil?s Seasonally Dry Tropical Forest through the biogeography of succulent spurges (Euphorbia sect. Brasilienses)".

This study is part of submission 22664 (Status: Published).

Citation

Hurbath F., Stubbs R.L., Cordeiro I., & Cellinese N. 2020. Inferring the origins of Brazil?s Seasonally Dry Tropical Forest through the biogeography of succulent spurges (Euphorbia sect. Brasilienses). TAXON, .

Authors

• Hurbath F. (submitter) +55 71 992079666
• Stubbs R.L.
• Cordeiro I.
• Cellinese N.

Abstract

PREMISE OF THE STUDY: Seasonally Dry Tropical Forests (SDTF) are found scattered throughout Central and South America, from northwestern Mexico to northern Argentina, and southwestern and eastern Brazil, with eastern Brazil having the largest and most isolated fragment of SDTF. Many hypotheses have been put forth to explain the evolution of the distinct SDTF habitat. This includes ancient, in-situ diversification, long-distance dispersal between disjunct SDTF patches, and dispersal from neighboring biomes and subsequent adaptation to the unique habitat. To address these varied hypotheses, we investigated the biogeographic history of Euphorbia sect. Brasilienses, a group of succulent spurges endemic to eastern Brazil?s SDTF. Understanding the origin and evolution of this group enables insights into the history of the Brazilian SDTF. To this aim, we assembled a concatenated matrix from 126 accessions with four markers (309 sequences from previous studies and 12 newly generated): one nuclear (ITS1) and three plastid (matK, ndhF, trnL-trnF) loci. Our results showed that Euphorbia sect. Brasilienses and its sister group E. sect. Stachydium diverged from a common ancestor during the Miocene around 16.52 Ma. Stachydium was recovered with a mean age of 7.72 Ma, while Brasilienses was recovered as a relatively young group, having diversified 3.15 Ma. Biogeographic results showed that the ancestral range of clade Stachydium + Brasilienses comprised the Andes and eastern Brazil?s SDTF, therefore suggesting past connections between western and eastern South America. The ancestral range of Brasilienses was restricted to eastern Brazil SDTF, which contrasted with Stachydium that was recovered with a broader ancestral range around late Miocene, followed by a vicariant event during the Pleistocene. Our results suggest limited dispersal abilities, niche conservatisms and an origin for Brasilienses pre-dating the Pleistocene. By contributing to the understanding of the origin and diversification of this group of endemic spurges, our study provides insight into the history of this distinct ecosystem in South America.

Keywords

Caatinga; Euphorbiaceae; Phosphorea complex; sect. Stachydium; Neotropics; South America

External links

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S22664
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref28422,
  	 author = {Fernanda  Hurbath and Rebecca L. Stubbs and In?s  Cordeiro and Nico  Cellinese},
  	 title = {Inferring the origins of Brazil?s Seasonally Dry Tropical Forest through the biogeography of succulent spurges (Euphorbia sect. Brasilienses)},
  	 year = {2020},
  	 keywords = {Caatinga; Euphorbiaceae; Phosphorea complex; sect. Stachydium; Neotropics; South America},
  	 doi = {},
  	 url = {http://},
  	 pmid = {},
  	 journal = {TAXON},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {PREMISE OF THE STUDY: Seasonally Dry Tropical Forests (SDTF) are found scattered throughout Central and South America, from northwestern Mexico to northern Argentina, and southwestern and eastern Brazil, with eastern Brazil having the largest and most isolated fragment of SDTF. Many hypotheses have been put forth to explain the evolution of the distinct SDTF habitat. This includes ancient, in-situ diversification, long-distance dispersal between disjunct SDTF patches, and dispersal from neighboring biomes and subsequent adaptation to the unique habitat. To address these varied hypotheses, we investigated the biogeographic history of Euphorbia sect. Brasilienses, a group of succulent spurges endemic to eastern Brazil?s SDTF. Understanding the origin and evolution of this group enables insights into the history of the Brazilian SDTF. To this aim, we assembled a concatenated matrix from 126 accessions with four markers (309 sequences from previous studies and 12 newly generated): one nuclear (ITS1) and three plastid (matK, ndhF, trnL-trnF) loci. Our results showed that Euphorbia sect. Brasilienses and its sister group E. sect. Stachydium diverged from a common ancestor during the Miocene around 16.52 Ma. Stachydium was recovered with a mean age of 7.72 Ma, while Brasilienses was recovered as a relatively young group, having diversified 3.15 Ma. Biogeographic results showed that the ancestral range of clade Stachydium + Brasilienses comprised the Andes and eastern Brazil?s SDTF, therefore suggesting past connections between western and eastern South America. The ancestral range of Brasilienses was restricted to eastern Brazil SDTF, which contrasted with Stachydium that was recovered with a broader ancestral range around late Miocene, followed by a vicariant event during the Pleistocene. Our results suggest limited dispersal abilities, niche conservatisms and an origin for Brasilienses pre-dating the Pleistocene. By contributing to the understanding of the origin and diversification of this group of endemic spurges, our study provides insight into the history of this distinct ecosystem in South America.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 28422
  AU  - Hurbath,Fernanda 
  AU  - Stubbs,Rebecca L.
  AU  - Cordeiro,In?s 
  AU  - Cellinese,Nico 
  T1  - Inferring the origins of Brazil?s Seasonally Dry Tropical Forest through the biogeography of succulent spurges (Euphorbia sect. Brasilienses)
  PY  - 2020
  KW  - Caatinga; Euphorbiaceae; Phosphorea complex; sect. Stachydium; Neotropics; South America
  UR  - http://dx.doi.org/
  N2  - PREMISE OF THE STUDY: Seasonally Dry Tropical Forests (SDTF) are found scattered throughout Central and South America, from northwestern Mexico to northern Argentina, and southwestern and eastern Brazil, with eastern Brazil having the largest and most isolated fragment of SDTF. Many hypotheses have been put forth to explain the evolution of the distinct SDTF habitat. This includes ancient, in-situ diversification, long-distance dispersal between disjunct SDTF patches, and dispersal from neighboring biomes and subsequent adaptation to the unique habitat. To address these varied hypotheses, we investigated the biogeographic history of Euphorbia sect. Brasilienses, a group of succulent spurges endemic to eastern Brazil?s SDTF. Understanding the origin and evolution of this group enables insights into the history of the Brazilian SDTF. To this aim, we assembled a concatenated matrix from 126 accessions with four markers (309 sequences from previous studies and 12 newly generated): one nuclear (ITS1) and three plastid (matK, ndhF, trnL-trnF) loci. Our results showed that Euphorbia sect. Brasilienses and its sister group E. sect. Stachydium diverged from a common ancestor during the Miocene around 16.52 Ma. Stachydium was recovered with a mean age of 7.72 Ma, while Brasilienses was recovered as a relatively young group, having diversified 3.15 Ma. Biogeographic results showed that the ancestral range of clade Stachydium + Brasilienses comprised the Andes and eastern Brazil?s SDTF, therefore suggesting past connections between western and eastern South America. The ancestral range of Brasilienses was restricted to eastern Brazil SDTF, which contrasted with Stachydium that was recovered with a broader ancestral range around late Miocene, followed by a vicariant event during the Pleistocene. Our results suggest limited dispersal abilities, niche conservatisms and an origin for Brasilienses pre-dating the Pleistocene. By contributing to the understanding of the origin and diversification of this group of endemic spurges, our study provides insight into the history of this distinct ecosystem in South America.
  L3  - 
  JF  - TAXON
  VL  - 
  IS  - 
  ER  -