Bipolar biogeography

Donoghue, Michael J.

doi:10.1073/pnas.1103801108

Cited by 28 publications

(34 citation statements)

References 15 publications

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“…Many lichens are also known to display bipolar distributions, and a recent population genetics study found evidence that the bipolar lichen Cetraria aculeata colonised Antarctica via South America during the Pleistocene (Fernández‐Mendoza & Printzen ). With the data currently available, it is not possible to discount alternative hypotheses for the establishment of bipolar distributions in fungi, such as trans‐tropical migrations during the Pleistocene, and ancient vicariance (Donoghue ). Future studies could seek to investigate further genetic similarities and gene flow of bipolar microbes using isolates from different populations.…”

Section: Discussionmentioning

confidence: 99%

Not poles apart: Antarctic soil fungal communities show similarities to those of the distant Arctic

et al. 2016

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Antarctica's extreme environment and geographical isolation offers a useful platform for testing the relative roles of environmental selection and dispersal barriers influencing fungal communities. The former process should lead to convergence in community composition with other cold environments, such as those in the Arctic. Alternatively, dispersal limitations should minimise similarity between Antarctica and distant northern landmasses. Using high-throughput sequencing, we show that Antarctica shares significantly more fungi with the Arctic, and more fungi display a bipolar distribution, than would be expected in the absence of environmental filtering. In contrast to temperate and tropical regions, there is relatively little endemism, and a strongly bimodal distribution of range sizes. Increasing southerly latitude is associated with lower endemism and communities increasingly dominated by fungi with widespread ranges. These results suggest that microorganisms with well-developed dispersal capabilities can inhabit opposite poles of the Earth, and dominate extreme environments over specialised local species.

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Section: Discussionmentioning

confidence: 99%

Not poles apart: Antarctic soil fungal communities show similarities to those of the distant Arctic

et al. 2016

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“…An antitropical (or amphitropical) distribution represents an intriguing pattern of disjunct occurrence of organisms at a global scale, in which the same taxon or sister taxa occupy regions north and south of the tropics but are absent from the intervening tropical regions (Hubbs, 1952; Randall, 1981; Donoghue, 2011). Such a distribution has mostly been observed for marine organisms (e.g.…”

Section: Introductionmentioning

confidence: 99%

Molecular phylogeography reveals an antitropical distribution and local diversification of Solenogyne (Asteraceae) in the Ryukyu Archipelago of Japan and Australia

Nakamura

Denda

Kokubugata

et al. 2011

Biological Journal of the Linnean Society

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An antitropical distribution represents an intriguing disjunction, in which a given species or sister lineages occupy regions north and south of the tropics but are absent from the intervening areas. Solenogyne mikadoi endemic to the Ryukyu Archipelago is regarded as an Australian element. Testing the phylogenetic relationship with Australian congeners and discussing the onset timing and causes of the disjunction would potentially enhance the understanding of antitropical distribution. A nuclear ribosomal DNA phylogeny was reconstructed using Bayesian and most parsimonious criteria with allied genera. Solenogyne was monophyletic and clustered with Lagenophora huegelii endemic to Australia, indicating the antitropical distribution and Australian origin of Solenogyne. Multispecies coalescent analysis based on nuclear ribosomal DNA and chloroplast DNA indicated the divergence of S. mikadoi and Australian congeners in the Plio-Pleistocene. Phylogenetic network analyses suggested that the ancestral lineage of S. mikadoi first colonized the southernmost island in the archipelago and then dispersed northward. The migration to the archipelago likely followed the flourishing of Solenogyne in open vegetation communities that radiated in south-eastern Australia during the late Pliocene. This disjunction might arise through long-distance dispersal across the tropics or, alternatively, through extinction in the tropics as a result of unsuitably high temperatures during climate oscillation and/or competitions from diverse tropical flora surviving since the early Tertiary.

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“…Under the vicariance paradigm, geographic distributions are explained as arising from a common history of geographic-range fragmentation, and dispersal is treated as an idiosyncratic and uncoordinated process producing no clear pattern (Zink et al 2000; Donoghue 2008, 2011). …”

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confidence: 99%

Coordinated Dispersal and Pre-Isthmian Assembly of the Central American Ichthyofauna

et al. 2015

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We document patterns of coordinated dispersal over evolutionary time frames in heroine cichlids and poeciliine live-bearers, the two most species-rich clades of freshwater fishes in the Caribbean basin. Observed dispersal rate (DO) values were estimated from time-calibrated molecular phylogenies in Lagrange+, a modified version of the ML-based parametric biogeographic program Lagrange. DO is measured in units of “wallaces” (wa) as the number of biogeographic range-expansion events per million years. DO estimates were generated on a dynamic paleogeographic landscape of five areas over three time intervals from Upper Cretaceous to Recent. Expected dispersal rate (DE) values were generated from alternative paleogeographic models, with dispersal rates proportional to target area and source-river discharge volume, and inversely proportional to paleogeographic distance. Correlations between DO and DE were used to assess the relative contributions of these three biogeographic parameters. DO estimates imply a persistent dispersal corridor across the Eastern (Antillean) margin of the Caribbean plate, under the influence of prevailing and perennial riverine discharge vectors such as the Proto–Orinoco–Amazon river. Ancestral area estimation places the earliest colonizations of the Greater Antilles and Central America during the Paleocene–Eocene (ca. 58–45 Ma), potentially during the existence of an incomplete Paleogene Arc (∼59 Ma) or Lesser Antilles Arc (∼45 Ma), but predating the GAARlandia land bridge (∼34–33 Ma). Paleogeographic distance is the single best predictor of DO. The Western (Central American) plate margin did not serve as a dispersal corridor until the Late Neogene (12–0 Ma), and contributed relatively little to the formation of modern distributions.

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Bipolar biogeography

Cited by 28 publications

References 15 publications

Not poles apart: Antarctic soil fungal communities show similarities to those of the distant Arctic

Not poles apart: Antarctic soil fungal communities show similarities to those of the distant Arctic

Molecular phylogeography reveals an antitropical distribution and local diversification of Solenogyne (Asteraceae) in the Ryukyu Archipelago of Japan and Australia

Coordinated Dispersal and Pre-Isthmian Assembly of the Central American Ichthyofauna

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