Island biogeography of marine organisms

Nature, Год журнала: 2017, Номер 549(7670), С. 82 - 85

Опубликована: Авг. 29, 2017

Язык: Английский

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On the origin of endemic species in the Red Sea

Journal of Biogeography, Год журнала: 2015, Номер 43(1), С. 13 - 30

Опубликована: Окт. 19, 2015

Abstract Aim The geological and palaeo‐climatic forces that produced the unique biodiversity in Red Sea are a subject of vigorous debate. Here, we review evidence for against hypotheses that: (1) fauna was extirpated during glacial cycles Pleistocene (2) coral reef found refuge within or just outside low sea level stands when conditions were inhospitable. Location Western Indian Ocean. Methods We literature on palaeontological, geological, biological genetic allow us to explore competing origins maintenance shallow‐water Sea. Results Palaeontological (microfossil) indicates some areas central devoid most plankton due hypersaline caused by almost complete isolation from However, two may have retained adequate survival: Gulf Aqaba southern In addition Sea, which separated northern faunas, strong barrier also operate region: cold, nutrient‐rich water upwelling at boundary Aden Arabian Biological data either inconclusive support these putative barriers refugia, but no set, know rejects them. Genetic suggests many endemic lineages diverged their Ocean counterparts long before recent glaciations and/or restricted narrow areas, especially Main conclusions High endemism observed appears multiple origins. A separates rest whereas strait Aden, each providing potential isolating barriers. Additional arise environmental gradients, circulation patterns constriction mouth Aqaba. Endemics evolved basin had survive relatively salinity refugia. It therefore those characteristics Peninsula region as whole, drive divergence populations via combination selection.

Язык: Английский

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Speciation with gene flow via cycles of isolation and migration: insights from multiple mangrove taxa

National Science Review, Год журнала: 2018, Номер 6(2), С. 275 - 288

Опубликована: Июль 22, 2018

Allopatric speciation requiring an unbroken period of geographical isolation has been the standard model neo-Darwinism. While doubts have repeatedly raised, strict allopatry without any gene flow remains a plausible mechanism in most cases. To rigorously reject allopatry, genomic sequences superimposed on geological records well-delineated barrier are necessary. The Strait Malacca, narrowly connecting Pacific and Indian Ocean coasts, serves at different times either as or conduit for coastal/marine species. We surveyed 1700 plants from 29 populations 5 common mangrove species by large-scale DNA sequencing added several whole-genome assemblies. Speciation between two oceans is driven cycles due to fluctuations sea level leading opening/closing ocean currents. Because time required mangroves longer than phases, these proceeded through many mixing-isolation-mixing, MIM, cycles. MIM mechanism, relaxing condition no flow, can promote more features can. Finally, also efficient, potentially yielding mn (m > 1) ather n cycles.Mechanisms formation always conundrum. that fully geographically isolated, allopatric speciation, solution last 50 years. Complete with possibility however, often untenable inefficient generating enormous biodiversity. By studying Indo-Malayan global hotspot coastal biodiversity, we were able combine data Indo-Pacific Barrier separates coasts. discovered novel call mixingisolation-mixing (MIM) permitting intermittent during speciation,MIMcycles generate exponential rate, thus combining biodiversity unified framework.

Язык: Английский

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Empty Niches after Extinctions Increase Population Sizes of Modern Corals

Current Biology, Год журнала: 2016, Номер 26(23), С. 3190 - 3194

Опубликована: Ноя. 17, 2016

Язык: Английский

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A major sea-level drop briefly precedes the Toarcian oceanic anoxic event: implication for Early Jurassic climate and carbon cycle

Scientific Reports, Год журнала: 2019, Номер 9(1)

Опубликована: Авг. 29, 2019

Abstract Sea-level change is an important parameter controlling the expansion of oxygen-depleted conditions in neritic settings during oceanic anoxic events (OAEs). Despite this fundamental role, it remains on a short timescale (<1 Myr) one least constrained parameters for numerous OAEs. Here we present sedimentological and geochemical evidence from Morocco East Greenland showing that forced regression shortly precedes (ca.10 2 kyr) major transgression associated with Toarcian OAE. The can be correlated over distances greater than 3000 km Tethyan Boreal basins, indicating relative sea-level was driven by eustastic fluctuations. amplitude (>50 m) duration suggests most likely related to transient waxing waning polar ice sheet. We suggest short-lived glaciation might have genetic link inception Indeed, deglaciation accompanying rise, thawing permafrost may released quantities methane into atmosphere would contributed OAE rapid warming its characteristic negative carbon isotope excursion. This study offers hypothesis how some hyperthermal rooted “cold-snap” episodes.

Язык: Английский

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The molecular biogeography of the Indo‐Pacific: Testing hypotheses with multispecies genetic patterns

Global Ecology and Biogeography, Год журнала: 2019, Номер 28(7), С. 943 - 960

Опубликована: Апрель 22, 2019

Abstract Aim To test hypothesized biogeographic partitions of the tropical Indo‐Pacific Ocean with phylogeographic data from 56 taxa, and to evaluate strength nature barriers emerging this test. Location The Ocean. Time period Pliocene through Holocene. Major taxa studied Fifty‐six marine species. Methods We tested eight hypotheses for partitioning using a novel modification analysis molecular variance. Putative gene flow were evaluated pairwise Φ ST , these distributions compared randomized datasets simple coalescent simulations vicariance arising Last Glacial Maximum. then weighed relative contribution distance versus environmental or geographic distance‐based redundancy (dbRDA). Results observed diversity outcomes, although majority species fit few broad regions. Repeated simulation model yielded wide distribution that was very similar empirical across five putative flow. Three had median significantly larger than random expectation. Only 21 52 analysed dbRDA rejected null model. Among these, 15 overwater as significant predictor while 11 other distance. Main conclusions Although there is support three previously described barriers, discordance in indicates incongruity between processes shaping at population levels. many possible causes incongruity, genetic drift provides most compelling explanation: given massive effective sizes species, even hard tens thousands years can yield values range 0 nearly 0.5.

Язык: Английский

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Common latitudinal gradients in functional richness and functional evenness across marine and terrestrial systems

Proceedings of the Royal Society B Biological Sciences, Год журнала: 2019, Номер 286(1908), С. 20190745 - 20190745

Опубликована: Июль 31, 2019

Functional diversity is an important aspect of biodiversity, but its relationship to species in time and space poorly understood. Here we compare spatial patterns functional taxonomic across marine terrestrial systems identify commonalities their respective ecological evolutionary drivers. We placed species-level traits into comparable multi-dimensional frameworks for two model systems, bivalves birds, used global species-occurrence data examine the distribution with latitude longitude. In both tropical faunas show high total richness (FR) low evenness (FE) (i.e. tropics contain a highly skewed among groups). groups that persist toward poles become more uniform richness, such FR declines FE rises systems. Temperate assemblages are functionally even than subsampled temperate levels suggesting reflects degree specialization within few and/or factors favour recent speciation or reduced extinction rates those groups.

Язык: Английский

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Genome sequences reveal global dispersal routes and suggest convergent genetic adaptations in seahorse evolution

Nature Communications, Год журнала: 2021, Номер 12(1)

Опубликована: Фев. 17, 2021

Seahorses have a circum-global distribution in tropical to temperate coastal waters. Yet, seahorses show many adaptations for sedentary, cryptic lifestyle: they require specific habitats, such as seagrass, kelp or coral reefs, lack pelvic and caudal fins, give birth directly developed offspring without pronounced pelagic larval stage, rendering long-range dispersal by conventional means inefficient. Here we investigate seahorses' worldwide biogeographic patterns based on de novo genome assembly of Hippocampus erectus well 358 re-sequenced genomes from 21 species. evolved the late Oligocene subsequent colonization routes are identified linked changing dynamics ocean currents paleo-temporal seaway openings. Furthermore, genetic basis recurring "bony spines" adaptive phenotype is independent substitutions key developmental gene. Analyses thus suggest that rafting via compensates poor rapid adaptation facilitates colonizing new habitats.

Язык: Английский

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Cenozoic history of the tropical marine biodiversity hotspot

Nature, Год журнала: 2024, Номер 632(8024), С. 343 - 349

Опубликована: Июнь 26, 2024

The region with the highest marine biodiversity on our planet is known as Coral Triangle or Indo-Australian Archipelago (IAA)

Язык: Английский

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Historical biogeography of the Mugil cephalus species complex and its rapid global colonization

Molecular Phylogenetics and Evolution, Год журнала: 2025, Номер unknown, С. 108296 - 108296

Опубликована: Янв. 1, 2025

Язык: Английский

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