Central American climate and microrefugia: A view from the last interglacial

Cárdenes-Sandí, G. M.; Shadik, Courtney R.; Correa-Metrio, A.; Gosling, William D.; Cheddadi, Rachid; Bush, Mark B.

doi:10.1016/j.quascirev.2018.12.021

Cited by 14 publications

(12 citation statements)

References 69 publications

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“…Lobatae complex involving Q. eugeniifolia , Q. benthamii , Q. cortesii and Q. lowilliamsii , has a history of extensive taxonomic complication (Quezada Aguilar et al ., 2016). The current work provides evidence that the species constitute a complex meriting more attention and draws attention to the possibility that Central American oak diversity and the role of Central American geology in Neotropical oak diversification has been underestimated (Cárdenes-Sandí et al ., 2019), overshadowed as they have been by interest in the Mexican oak diversification (Quezada Aguilar et al ., 2017). In the white oaks s.str.…”

Section: Discussionmentioning

confidence: 95%

Genomic landscape of the global oak phylogeny

Hipp

Manos

Hahn

et al. 2019

Preprint

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41• The tree of life is highly reticulate, with the history of population divergence buried amongst 42 phylogenies deriving from introgression and lineage sorting. In this study, we test the 43 hypothesis that there are regions of the oak (Quercus, Fagaceae) genome that are broadly 44 informative about phylogeny and investigate global patterns of oak diversity. 45• We utilize fossil data and restriction-site associated DNA sequencing (RAD-seq) for 632 46 individuals representing ca. 250 oak species to infer a time-calibrated phylogeny of the world's 47• The support we find for the phylogeny contrasts with high genomic heterogeneity in 56 phylogenetic signal and introgression. Oaks are phylogenomic mosaics, and their diversity may 57 in fact depend on the gene flow that shapes the oak genome. 58 59

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Section: Discussionmentioning

confidence: 95%

Genomic landscape of the global oak phylogeny

Hipp

Manos

Hahn

et al. 2019

Preprint

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“…For example, the section Lobatae complex involving Q. eugeniifolia , Q. benthamii , Q. cortesii and Q. lowilliamsii has a complicated taxonomic history (Quezada Aguilar et al ., ). The current work draws attention to the possibility that Central American oak diversity and the role of Central American geology in Neotropical oak diversification has been underestimated (Cárdenes‐Sandí et al ., ), overshadowed as they have been by interest in the Mexican oak diversification (Quezada Aguilar et al ., ). In the white oaks s.s .…”

Section: Discussionmentioning

confidence: 99%

Genomic landscape of the global oak phylogeny

et al. 2019

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The tree of life is highly reticulate, with the history of population divergence emerging from populations of gene phylogenies that reflect histories of introgression, lineage sorting and divergence. In this study, we investigate global patterns of oak diversity and test the hypothesis that there are regions of the oak genome that are broadly informative about phylogeny.We utilize fossil data and restriction-site associated DNA sequencing (RAD-seq) for 632 individuals representing nearly 250 Quercus species to infer a time-calibrated phylogeny of the world's oaks. We use a reversible-jump Markov chain Monte Carlo method to reconstruct shifts in lineage diversification rates, accounting for among-clade sampling biases. We then map the > 20 000 RAD-seq loci back to an annotated oak genome and investigate genomic distribution of introgression and phylogenetic support across the phylogeny.Oak lineages have diversified among geographic regions, followed by ecological divergence within regions, in the Americas and Eurasia. Roughly 60% of oak diversity traces back to four clades that experienced increases in net diversification, probably in response to climatic transitions or ecological opportunity.The strong support for the phylogeny contrasts with high genomic heterogeneity in phylogenetic signal and introgression. Oaks are phylogenomic mosaics, and their diversity may in fact depend on the gene flow that shapes the oak genome.

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“…Thus, shifted baselines (sensu Pauly, 1995) could also contribute to an apparent mismatch between modern and past pollen spectra, as no-analogue combinations contain species that simply no longer co-occur (Williams & Jackson, 2007). At other times, the mismatch is more subtle, and is revealed through multivariate analysis of the pollen abundance data (Cárdenes-Sandí et al, 2019). A potential limitation with our dataset is that the array of modern samples is simply incomplete, that is, a Type I error in which an unobserved area would in fact provide an analogue.…”

Section: And the Galápagosmentioning

confidence: 99%

“…Pollen spectra recovered from modern settings are used to calibrate pollen assemblages with the modern environment so that quantitative estimates can be derived for past climates Cárdenes-Sandí et al, 2019;Correa-Metrio et al, 2013;Lamb, 1984;Whitmore et al, 2005;Willard, Weimer, & Riegel, 2001). Such quantitative reconstructions of past climates may take the form of 'transfer functions' (Andrews, Mode, & Davis, 1980;Bryson & Kutzbach, 1974;Riding, Rawlins, & Coley, 2007), with the recognition that the algorithms are highly dependent on the coverage or representation of modern pollen assemblages across environmental gradients.…”

Section: Introductionmentioning

confidence: 99%

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Modern pollen assemblages of the Neotropics

Bush

Correa‐Metrio

Woesik

et al. 2020

Journal of Biogeography

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AimModern pollen assemblages provide a means to calibrate fossil pollen data and to provide a translation from habitat and vegetation type to pollen representation. Here we provide a database of modern pollen abundances from a broad range of neotropical habitats and locations.LocationThe Neotropics, especially western Amazonia, the Andes, The Galápagos, Central America, Puerto Rico and Mexico.TaxonAngiosperms and GymnospermsMethodsOver a 30‐year period, mud–water interface samples, moss polsters, soils and pollen traps were used to assay modern pollen assemblages. Standard extraction methods were used, and a minimum of 300 terrestrial pollen grains were counted and identified in each sample. Bioclimatic data were assigned to each location, and sexual traits and pollination syndromes are provided for some genera. A detrended correspondence analysis (DCA) shows the structuring of the data relative to mean annual temperatures (MAT), mean annual precipitation (MAP) and precipitation of the driest quarter (PDQ). Probability density functions of distances among samples are calculated within and between Holdridge Life Zones, based on sample DCA scores.ResultsThe modern pollen of 636 locations are documented, with >500 pollen types identified. The dataset spans settings with MAT <5°C to > 25°C, and with MAP ranging from c. 500 to 5,000 mm, and PDQ from 80 to 1,500 mm. Ordination of the dataset provides evidence that assemblages differ according to temperature and precipitation, although historical biogeography also shapes pollen rains. The pollen grains of zoophilous species contribute important information to habitat descriptions, but they are under‐represented in the dataset.Main conclusionsThe dataset covers a broad environmental range and can help inform biogeographical and palaeoenvironmental interpretation of palaeoecological records. Some caution in using the data is needed as the field of tropical palynology is maturing and the data gathered 30 years ago are less detailed than those gathered recently. Although anemophilous taxa tend to be over‐represented in neotropical pollen spectra, the majority of pollen identified in each sample are from zoophilous species.

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Central American climate and microrefugia: A view from the last interglacial

Cited by 14 publications

References 69 publications

Genomic landscape of the global oak phylogeny

Genomic landscape of the global oak phylogeny

Genomic landscape of the global oak phylogeny

Modern pollen assemblages of the Neotropics

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