Eighty-five million years of Pacific Ocean gyre ecosystem structure: long-term stability marked by punctuated change

  title={Eighty-five million years of Pacific Ocean gyre ecosystem structure: long-term stability marked by punctuated change},
  author={Elizabeth C. Sibert and Richard D. Norris and Jos{\'e} Mar{\'i}a Cuevas and Lana G Graves},
  journal={Proceedings of the Royal Society B: Biological Sciences},
While the history of taxonomic diversification in open ocean lineages of ray-finned fish and elasmobranchs is increasingly known, the evolution of their roles within the open ocean ecosystem remains poorly understood. To assess the relative importance of these groups through time, we measured the accumulation rate of microfossil fish teeth and elasmobranch dermal denticles (ichthyoliths) in deep-sea sediment cores from the North and South Pacific gyres over the past 85 million years (Myr). We… Expand
Two pulses of morphological diversification in Pacific pelagic fishes following the Cretaceous–Palaeogene mass extinction
It is suggested that while the K/Pg event had a minor impact on fish diversity in terms of extinction, the removal of the few dominant Cretaceous morphotypes triggered a sequence of origination events allowing fishes to rapidly diversify morphologically, setting the stage for exceptional levels of ray-finnedFish diversity in the Cenozoic. Expand
The extinction and survival of sharks across the end-Cretaceous mass extinction
The results show that selachimorphs maintained virtually static levels of dental disparity in most of their constituent clades during the Cretaceous/Paleogene transition, while some lamniform lineages experienced morphological depletion, others underwent a post-extinction disparity increase. Expand
Independent evolution of baleen whale gigantism linked to Plio-Pleistocene ocean dynamics
It is shown that mysticetes underwent a clade-wide shift in their mode of body size evolution during the Plio-Pleistocene, and this transition, from Brownian motion-like dynamics to a trended random walk towards larger size, is temporally linked to the onset of seasonally intensified upwelling along coastal ecosystems. Expand
Fish proliferation and rare-earth deposition by topographically induced upwelling at the late Eocene cooling event
Using osmium isotope ratios to determine the depositional ages of pelagic clays extraordinarily rich in fish debris shows that much fish debris was deposited in the western North and central South Pacific sites roughly 34.4 million years ago, concurrent with a late Eocene event. Expand
An early Miocene extinction in pelagic sharks
Evidence is presented for a previously unknown major extinction event in sharks that occurred in the early Miocene, ~19 million years ago, which led to a reduction in shark diversity and an almost complete loss in total abundance and was a period of rapid, transformative change for open-ocean ecosystems. Expand
The stability of coastal benthic biogeography over the last 10 million years
AIM: We demarcate marine benthic global bioregions based on fossil and recent occurrence data. Our main goal is to compare past and present biogeography and to extract major abiotic drivers ofExpand
Tooth morphology elucidates shark evolution across the end-Cretaceous mass extinction
The results show that selachimorphs maintained virtually static levels of dental disparity in most of their constituent clades across the Cretaceous–Paleogene interval, and selective extinctions did impact apex predator species characterized by triangular blade-like teeth. Expand
A phylogenomic framework for pelagiarian fishes (Acanthomorpha: Percomorpha) highlights mosaic radiation in the open ocean
A novel sequence dataset of over 1000 ultraconserved DNA elements for 94 of the 286 species of Pelagiaria provides a time-calibrated phylogeny for this widely distributed clade, indicating a mosaic model of diversification. Expand
Methods for isolation and quantification of microfossil fish teeth and elasmobranch dermal denticles (ichthyoliths) from marine sediments
Methods to isolate and utilize ichthyoliths preserved in the sedimentary record to track fish community structure and ecosystem productivity through geological and historical time periods are presented. Expand
Links between fish abundance and ocean biogeochemistry as recorded in marine sediments
Sediment proxy records of fish abundance from the west coasts of the Americas are compiled, and a small number of statistically significant relationships between fish debris and biogeochemical variables are found, at least some of which are likely to reflect causal relationships. Expand


New Age of Fishes initiated by the Cretaceous−Paleogene mass extinction
Significance Ray-finned fishes are the most diverse and ecologically dominant group of vertebrates on the planet. Previous molecular phylogenies and paleontological studies have shown that modernExpand
Marine tetrapod macroevolution: Physical and biological drivers on 250 Ma of invasions and evolution in ocean ecosystems
Placed in a broad comparative view from the Mesozoic to the Cenozoic eras, the macroevolution of marine tetrapods reveals evolutionary drivers at different scales, along with morphological parallels, unique evolutionary innovations, and the strong influence of historical constraints. Expand
Five hundred million years of extinction and recovery: a phanerozoic survey of large‐scale diversity patterns in fishes
A broad overview of the Phanerozoic history of fish diversity is provided, placing a special emphasis on intervals of turnover, evolutionary radiation, and extinction. Expand
Climate, Critters, and Cetaceans: Cenozoic Drivers of the Evolution of Modern Whales
Based on a comprehensive diversity data set, much of observed cetacean paleodiversity can indeed be explained by diatom diversity in conjunction with variations in climate as indicated by oxygen stable isotope records (δ18O). Expand
Radiation of Extant Cetaceans Driven by Restructuring of the Oceans
It is found that the toothed whales are monophyletic, suggesting that echolocation evolved only once early in that lineage some 36–34 Ma, and support is found for increased diversification rates during periods of pronounced physical restructuring of the oceans. Expand
Cenozoic cooling, Antarctic nutrient pump, and the evolution of whales
Abstract The evolution of large marine mammals and their invasion of the pelagic realm is tied to the availability of sufficient food, which in turn is linked to upwelling areas and other highlyExpand
Ocean overturning since the Late Cretaceous: Inferences from a new benthic foraminiferal isotope compilation
[1] Benthic foraminiferal oxygen isotopic (d 18 O) and carbon isotopic (d 13 C) trends, constructed from compilations of data series from multiple ocean sites, provide one of the primary means ofExpand
Explosive morphological diversification of spiny-finned teleost fishes in the aftermath of the end-Cretaceous extinction
  • M. Friedman
  • Biology, Medicine
  • Proceedings of the Royal Society B: Biological Sciences
  • 2010
The trajectory of morphological diversification in this major radiation from its first appearance in the Late Cretaceous to the Miocene is reconstructed using a geometric morphometric database comprising more than 600 extinct species known from complete body fossils to suggest that multiple factors contributed to the prolific anatomical radiation of acanthomorphs. Expand
The effect of habitat on modern shark diversification
The new timetree suggests that the two major shark lineages leading to the extant shark diversity began diversifying mostly after the end‐Permian mass extinction: the squalimorphs into deepwater and the galeomorphs into shelf habitats. Expand
Resolution of ray-finned fish phylogeny and timing of diversification
Ray-finned fishes make up half of all living vertebrate species. Nearly all ray-finned fishes are teleosts, which include most commercially important fish species, several model organisms forExpand