Dispersal in the Ordovician: Speciation patterns and paleobiogeographic analyses of brachiopods and trilobites

Lam, Adriane R.; Stigall, Alycia L.; Matzke, Nicholas J.

doi:10.1016/j.palaeo.2017.10.006

Cited by 42 publications

(55 citation statements)

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“…Lam et al . () conducted a broader biogeographical analysis, using BioGeoBEARS, of multiple brachiopod and trilobite clades in the Peri‐Iapetus region and demonstrated that long‐distance dispersal (dispersal between palaeocontinents) was probably a general biogeographical pattern of most taxa during the Late Ordovician. Biogeographical studies on Ordovician trilobites with similar tropical distributions (Congreve & Lieberman , ; Congreve ) suggested that clades that experienced dispersal events between peri‐Iapetus regions and tropical Gondwana showed increased survivorship and would go on to radiate during the Silurian recovery.…”

Section: Discussionmentioning

confidence: 99%

Evolutionary and biogeographical shifts in response to the Late Ordovician mass extinction

2018

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The Late Ordovician mass extinction was an interval of high extinction with inferred low ecological selectivity, resulting in little change in community structure after the event. In contrast, the mass extinction may have fundamentally changed evolutionary dynamics in the surviving groups. We investigated the phylogenetic relationships among strophomenoid brachiopods, a diverse brachiopod superfamily that was a primary component of Ordovician ecosystems. Four Ordovician families/subfamilies sampled in the analysis (Rafinesquinidae, Strophomeninae, Glyptomenidae and Furcitellinae) were reconstructed as monophyletic groups, and the base of the strophomenoid clade that dominated the Silurian recovery was reconstructed as diversifying alongside these families during the Middle Ordovician. We time‐calibrated the phylogeny and used geographical occurrences to investigate biogeographical changes in the strophomenoids through time with the R package BiogeoBEARS. Our results indicate that extinction was higher in taxa whose ranges were constrained to tropical or subtropical regions. Furthermore, our results suggest important shifts in the diversification patterns of these brachiopods after the mass extinction. While most of the strophomenoid families survived the Late Ordovician event, ecologically abundant taxonomic groups during the Ordovician were either driven to extinction, reduced in diversity, or slowly died off during the Silurian. The new abundant strophomenoid taxa derived from one clade (consisting of Silurian–Devonian groups such as Douvillinidae, Strophodontidae and Amphistrophiidae) that diversified during the post‐extinction radiation. Our results suggest the selective diversification during the Silurian radiation, rather than selective extinction in the Late Ordovician, had a greater impact on the evolutionary history of strophomenoid brachiopods.

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Section: Discussionmentioning

confidence: 99%

Evolutionary and biogeographical shifts in response to the Late Ordovician mass extinction

2018

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“…A similar increase in ichnodiversity and ecosystem complexity, notably in bioerosion of metazoan reef organisms, has recently been described by Buatois et al (2016). Additional analyses, such as the recently published study by Lam et al (2017), to examine how global-scale changes (in ecosystems or tectonics) influence the local scale process of speciation would be extremely valuable.…”

Section: Speciation During the Gobementioning

confidence: 54%

“…These data link the broader scale patterns directly with the realm of speciation (Lam et al . ). Development of similar species‐level data sets for additional clades and palaeocontinents is necessary to test the generality of this pattern.…”

Section: Speciation During the Gobementioning

confidence: 97%

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How is biodiversity produced? Examining speciation processes during the GOBE

Stigall

2018

LET

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The accumulation of diversity is dependent on the production (and subsequent continuation) of new species; thus, it is important to contextualize the Great Biodiversification Event (GOBE) as the sum of a series of individual speciation events. Studies of speciation processes are only beginning to emerge for the GOBE, but early analyses of brachiopods and other taxa suggest that such research questions are tractable given appropriate data sets and analyses. In order to understand the GOBE, it is important to move from correlating diversity trends with environmental changes to explicitly assessing how correlative Earth system processes can facilitate the process and mechanisms of speciation. Explicit consideration of the hierarchical structure and biogeographical aspects of evolutionary processes provides a dynamic perspective to analyse speciation. Biogeographical processes of dispersal and vicariance provide the link between local and global diversity levels, and oscillations between these two biogeographical modalities can generate an effective speciation dynamo. Geographical isolation due to palaeogeography, numerous interoceanic islands, tectonism, glacial–interglacial cycles and newly developed habitat heterogeneity were likely key factors in promoting speciation. Understanding the processes that produced the GOBE will require careful consideration of the oceanic, climatic and tectonic processes operating during the Early Palaeozoic as well as the speciation process itself.

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“…These models rely on combining molecular phylogenies with ancestral state reconstructions to identify the origin of a focal set of taxa and their subsequent dispersal to other regions (Marske et al 2013). Testing how well phylogeographic models including or excluding species' long-distance events explain the current emergent pattern of species cooccurrence within a focal clade can enable understanding the assemblage-level effects of dispersal (Pennington and Dick 2004, Dick et al 2007, Lam et al 2018. More recently, the advent of approximate Bayesian computation (ABC) methods and high-throughput DNA sequencing methods have revolutionized our ability to directly test the effects of different dispersal processes on the aggregate distribution of cooccurring species (Hickerson et al 2010, Chan et al 2014.…”

Section: Phylogeographic Modelsmentioning

confidence: 99%

Understanding ecological change across large spatial, temporal and taxonomic scales: integrating data and methods in light of theory

Rapacciuolo

Blois

2019

Ecography

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Ecography E4 awardThe difficulty of integrating multiple theories, data and methods has slowed progress towards making unified inferences of ecological change generalizable across large spatial, temporal and taxonomic scales. However, recent progress towards a theoretical synthesis now provides a guiding framework for organizing and integrating all primary data and methods for spatiotemporal assemblage-level inference in ecology. In this paper, we describe how recent theoretical developments can provide an organizing paradigm for linking advances in data collection and methodological frameworks across disparate ecological sub-disciplines and across large spatial and temporal scales. First, we summarize the set of fundamental processes that determine change in multispecies assemblages across spatial and temporal scales by reviewing recent theoretical syntheses of community ecology. Second, we review recent advances in data and methods across the main sub-disciplines concerned with ecological inference across large spatial, temporal and taxonomic scales, and organize them based on the primary fundamental processes they include, rather than the spatiotemporal scale of their inferences. Finally, we highlight how iteratively focusing on only one fundamental process at a time, but combining all relevant spatiotemporal data and methods, may reduce the conceptual challenges to integration among ecological sub-disciplines. Moreover, we discuss a number of avenues for decreasing the practical barriers to integration among data and methods. We aim to reconcile the recent convergence of decades of thinking in community ecology and macroecology theory with the rapid progress in spatiotemporal approaches for assemblage-level inference, at a time where a robust understanding of spatiotemporal change in ecological assemblages is more crucial than ever to conserve biodiversity.

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Dispersal in the Ordovician: Speciation patterns and paleobiogeographic analyses of brachiopods and trilobites

Cited by 42 publications

References 142 publications

Evolutionary and biogeographical shifts in response to the Late Ordovician mass extinction

Evolutionary and biogeographical shifts in response to the Late Ordovician mass extinction

How is biodiversity produced? Examining speciation processes during the GOBE

Understanding ecological change across large spatial, temporal and taxonomic scales: integrating data and methods in light of theory

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