Biogeography and evolutionary diversification in one of the most widely distributed and species rich genera of the Pacific

Cantley, Jason T.; Markey, Adrienne S; Swenson, Nathan G.; Keeley, Sterling C.

doi:10.1093/aobpla/plw043

Cited by 21 publications

(21 citation statements)

References 70 publications

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“…Modern dispersal models for oceanic islands either do not acknowledge this massive subsidence (e.g. Cantley et al., ) or even reject it (O'Grady et al., ), but it is another likely cause of breaks in metapopulations on groups of oceanic islands.…”

Section: Metapopulation Vicariance In Oceanic Island Systems: Tectonimentioning

confidence: 99%

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Metapopulation vicariance explains old endemics on young volcanic islands

Heads

2017

Cladistics

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Terrestrial plants and animals on oceanic islands occupy zones of volcanism found at intraplate localities and along island arcs at subduction zones. The organisms often survive as metapopulations, or populations of separate sub-populations connected by dispersal. Although the individual islands and their local subpopulations are ephemeral and unstable, the ecosystem dynamism enables metapopulations to persist in a region, more or less in situ, for periods of up to tens of millions of years. As well as surviving on systems of young volcanic islands, metapopulations can also evolve there; tectonic changes can break up widespread insular metapopulations and produce endemics restricted to fewer islands or even a single island. These processes explain the presence of old endemic clades on young islands, which is often reported in molecular clock studies, and the many distribution patterns in island life that are spatially correlated with tectonic features. Metapopulations can be ruptured by sea floor subsidence, and this occurs with volcanic loading in zones of active volcanism and with sea floor cooling following its production at mid-ocean ridges. Metapopulation vicariance will also result if an active zone of volcanism is rifted apart. This can be caused by the migration of an arc (by slab rollback) away from a continent or from another subduction zone, by the offset of an arc at transform faults and by sea floor spreading at mid-ocean ridges. These mechanisms are illustrated with examples from islands in the Caribbean and the Pacific. Endemism on oceanic islands has usually been attributed to chance, long-distance dispersal, but the processes discussed here will generate endemism on young volcanic islands by vicariance.

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Section: Metapopulation Vicariance In Oceanic Island Systems: Tectonimentioning

confidence: 99%

“…Likewise, in the Pacific group, Coprosminae, Cantley et al. () rejected a vicariance origin for the island clades (including a Vanuatu–Fiji pair of sister species), as the current islands have never been joined to a continent or to each other…”

Section: A Case‐study: Metapopulation Vicariance In a Continental Andmentioning

confidence: 99%

Metapopulation vicariance explains old endemics on young volcanic islands

Heads

2017

Cladistics

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“…The fern genus Dicksonia , however, could be archaic in NZ, though a two‐dispersal scenario is preferred (Noben et al., ). The plant genus Coprosma splits from its sister genus ( Nertera ) at about 25 Ma and radiates extensively subsequent to evolving woodiness and dioecy after 15 Ma (Cantley, Markey, Swenson, & Keeley, ). We have included the Coprosma–Nertera lineage as having pre‐OMT NZ roots, but as 30 later dispersal events around the Pacific are inferred for Coprosma , we cannot have much confidence that the lineage was specifically located in NZ through the OMT.…”

Section: Resultsmentioning

confidence: 99%

Going under down under? Lineage ages argue for extensive survival of the Oligocene marine transgression on Zealandia

Wallis

Jorge

2018

Molecular Ecology

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Twenty‐five years ago, it was suggested that current‐day New Zealand, part of the largely sunken continent of Zealandia, could have been completely inundated during the Oligocene marine transgression (OMT) some 25–23 million years ago. Such an event would, of necessity, imply that all terrestrial, freshwater, and maybe coastal marine species must have dispersed there since. This idea has generated heated debate, on which geological, palaeontological and molecular data are being brought to bear. Here, we review the phylogeographic literature in the form of molecular estimates of divergence times between New Zealand lineages and their closest overseas sister groups. Using an event‐based approach, we show that these divergence times follow approximately a smooth exponential over the last 50 Ma or more. Approximately 74 of these 248 lineages appear to have survived the OMT in situ; some of these major lineages comprise multiple additional lineages as a result of autochthonous speciation prior to the OMT. Non‐volant terrestrial animals, freshwater animals and trees are particularly well represented in surviving lineages, whereas marine animals, herbs and shrubs tend to show more recent arrival times. There is no evidence for a deficit of pre‐Oligocene lineages, nor an excess of ones arriving just afterwards. The pattern is one of geometric increase in new lineages with more recent time, reflecting a balance between immigration and extinction. Consequently, this large body of molecular data provides no evidence for complete inundation of New Zealand during the Oligocene. In conjunction with new geological and palaeontological findings, these data suggest that it is time to put the idea to rest.

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“…To our knowledge, ours is the first study to document these patterns from a combined phylogenetic and biogeographic perspective. A study on Coprosma (Rubiaceae) suggested that red fruit was frequently associated with long‐distance dispersal (Cantley et al, ), but without statistical analyses (or accounting for the preponderance of red‐fruited species in the genus). Nevertheless, the similar patterns between Coprosma and Gaultherieae are consistent with the idea that these patterns may be general.…”

Section: Discussionmentioning

confidence: 99%

“…Duan et al, ; Shanahan, So, Gompton, & Gorlett, ) or darker coloured fruit (Schaefer et al, ). In a phylogenetic study of Coprosma (Rubiaceae), the authors noted that many dispersal events were by red‐fruited lineages, and they suggested that this pattern might be related to bird dispersal (Cantley, Markey, Swenson, & Keeley, ). However, they did not test for a statistical association between fruit colour and dispersal.…”

Section: Introductionmentioning

confidence: 99%

Why is fruit colour so variable? Phylogenetic analyses reveal relationships between fruit‐colour evolution, biogeography and diversification

Fritsch

Matzke

et al. 2019

Global Ecol Biogeogr

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Aim Are different fruit colours related to large‐scale patterns of dispersal, distribution and diversification? Here, we investigate this question for the first time, using phylogenetic approaches in the tribe Gaultherieae (Ericaceae). We test relationships between fruit colour and (a) biogeographic dispersal, (b) elevational and latitudinal species distributions and (c) rates of diversification. Location Global. Time period Recent to 30 million years ago. Major taxa studied The plant tribe Gaultherieae in the family Ericaceae (blueberries and relatives). Methods We estimated a new time‐calibrated phylogeny for Gaultherieae. Data on fruit colours and geographic distributions for each species were compiled from published sources and field observations. Using phylogenetic methods, we estimated major dispersal events across the tree and the most likely fruit colour associated with each dispersal event, and tested whether dispersal between major biogeographic regions was equally likely for different fruit colours, and whether dispersal distances were larger for certain colours. We then tested the relationships between fruit colours and geographic variables (latitude, elevation) and diversification rates. Results Large‐scale dispersal events were significantly associated with red‐fruited lineages, even though red‐fruited species were relatively uncommon. Further, different fruit colours were associated with different elevations and latitudes (e.g. red at lower elevations, violet at lower latitudes, white at higher elevations). Violet colour was related to increased diversification rates, leading to more violet‐fruited species globally. Main conclusions Overall, we show that different fruit colours can significantly impact the large‐scale dispersal, distribution and diversification of plant clades. Furthermore, the interplay between biogeography and fruit‐colour evolution seems to generate “taxon cycles” in fruit colour that may drive variation in fruit colour over macroevolutionary time‐scales.

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Biogeography and evolutionary diversification in one of the most widely distributed and species rich genera of the Pacific

Cited by 21 publications

References 70 publications

Metapopulation vicariance explains old endemics on young volcanic islands

Metapopulation vicariance explains old endemics on young volcanic islands

Going under down under? Lineage ages argue for extensive survival of the Oligocene marine transgression on Zealandia

Why is fruit colour so variable? Phylogenetic analyses reveal relationships between fruit‐colour evolution, biogeography and diversification

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