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Oliveira, Alexandre Adalardo de; Daly, Douglas C.

doi:10.1023/a:1008972901159

Cited by 51 publications

(2 citation statements)

References 31 publications

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“…Beven, Connor, and Beven (1984) argued that the observed spatial extent of overlap between sets of refugia proposed for different taxa, which was one of the main assumptions underpinning the hypothesis, was no different from that expected given random placement. Nelson, Ferreira, Dasilva, and Kawasaki (1990) suggested that high species diversity in some proposed refugia locations could be, at least for plants, due to sampling artifacts (but see De Oliveira & Daly, 1999). At this point, the theory seemed a premature idea and the call for independent geological, palynological, and paleoecological data increased (Connor, 1986).…”

Section: The Chronology Of the Ama Zon Refug Ia Hyp Othe S Ismentioning

confidence: 99%

What has become of the refugia hypothesis to explain biological diversity in Amazonia?

Rocha

Kaefer

2019

Ecology and Evolution

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The spatial distribution of biodiversity and related processes is the core of Biogeography. Amazonia is the world's most diverse rainforest and the primary source of diversity to several Neotropical regions. The origins of such diversity continue to be an unresolved question in evolutionary biology. Among many competing hypotheses to explain the evolution of the Amazonian biodiversity, one stands out as the most influential: the refugia hypothesis by Jürgen Haffer. Here, we provide a chronological overview on how the refugia hypothesis evolved over the decades and how the criticism from different fields affected its acceptance. We conclude that the refugia hypothesis alone cannot explain the diversification of the complex Amazonian diversity, and perhaps it was not the most important diversification mechanism. However, the debate provoked by refugia has produced a great amount of knowledge on Amazonian climatic, geological, and evolutionary processes, as well as on species distributions, movements, and history.

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Section: The Chronology Of the Ama Zon Refug Ia Hyp Othe S Ismentioning

confidence: 99%

What has become of the refugia hypothesis to explain biological diversity in Amazonia?

Rocha

Kaefer

2019

Ecology and Evolution

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“…For example, the catchment area of the Amazon and Rio Negro rivers, threatened by massive, deliberately set fires, is an important hotspot of Sapotaceae diversity. In the area of Manaus, a single hectare of primary forest may hold 23 species belonging to the family, making it one of the most species-rich plant groups in the region (Milliken, 1998;Oliveira & Daly, 1999;Oliveira & Nelson, 2001). Many Sapotaceae flower infrequently, sometimes at intervals of up to 10 years, and as a consequence a large number of collections are sterile, presenting significant challenges to scientists and conservation policy makers (Gomes & al., 2013;Sánchez-C. & al., 2022).…”

Section: ■ Introductionmentioning

confidence: 99%

Reassessment of generic boundaries in Neotropical Chrysophylloideae (Sapotaceae): Eleven reinstated genera and narrowed circumscriptions of Chrysophyllum and Pouteria

Swenson

Lepschi

Lowry

et al. 2023

TAXON

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Classifications of the pantropical plant family Sapotaceae based solely on morphology have historically recognized between 125 and 53 genera. Phylogenetic analyses using molecular data have repeatedly demonstrated that broad concepts of two large genera belonging to subfamily Chrysophylloideae, Chrysophyllum and Pouteria, are untenable and their narrowed delimitations have restricted them to the Neotropics. A recent phylogenetic study proposed further amendments by resurrecting the genera Achrouteria, Cornuella, Lucuma, Martiusella, Nemaluma, Prieurella and Ragala, and questioned the status of three generally accepted genera, Chromolucuma, Pradosia and Sarcaulus. We test this suggested classification using expanded sampling that comprises 122 terminals, including material of 29 of the 34 name‐bringing species for generic names historically regarded as synonyms of Chrysophyllum and Pouteria. We used sequence data from ribosomal nrDNA (ETS, ITS), the nuclear gene RPB2, two cpDNA spacers (petN‐psbM, trnH‐psbA), and indel information to estimate phylogenetic relationships in a Bayesian framework using BEAST. All sequences were newly realigned to test reproducibility, and 26 morphological characters were mapped on the resulting tree. Our analyses recovered three African genera embedded within a large Neotropical clade of Chrysophylloideae. We found strong support for the reinstatement of the seven genera listed above as well as for four other genera, viz. Chloroluma, Englerella, Labatia, and Peteniodendron. This subsequently leads to further amendments of Chrysophyllum and Pouteria, which are now limited to include 25–30 and 7 species, respectively. However, one clade that includes many name‐bringing lineages largely corresponds to Pouteria s.l., a group that needs further phylogenetic research to unravel relationships and generic limits. The hypothesis that Chrysophyllum cuneifolium had an inter‐continental hybrid origin involving genomes from Africa and South America is rejected because it is shown to have been based on erroneous results obtained from a contaminated DNA aliquot. A total of 73 genera are currently recognised in Sapotaceae, 21 of which are Neotropical members of Chrysophylloideae. We update the nomenclature and synonymy of 75 species, make 36 new combinations, and designate lectotypes for 31 names.

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