The Phoenicians in Arcadia Essai de Méthode en Mythologie Grecque: De l' Origine des Cultes Arcadiens: Victor Béraed. Paris: Thorin. 1894. 12fr.5O.

n/

Marine extinction risk shaped by trait-environment interactions over 500 million years

Perhaps the most pressing issue in predicting biotic responses to present and future global change is understanding how environmental factors shape the relationship between ecological traits and extinction risk. The fossil record provides millions of years of insight into how extinction selectivity (i.e., differential extinction risk) is shaped by interactions between ecological traits and environmental conditions. Numerous paleontological studies have examined trait-based extinction selectivity; however, the extent to which these patterns are shaped by environmental conditions is poorly understood due to a lack of quantitative synthesis across studies. We conducted a meta-analysis of published studies on fossil marine bivalves and gastropods that span 458 million years to uncover how global environmental and geochemical changes covary with trait-based extinction selectivity. We focused on geographic range size and life habit (i.e., infaunal vs. epifaunal), two of the most important and commonly examined predictors of extinction selectivity. We used geochemical proxies related to global climate, as well as indicators of ocean acidification, to infer average global environmental conditions. Life-habit selectivity is weakly dependent on environmental conditions, with infaunal species relatively buffered from extinction during warmer climate states. In contrast, the odds of taxa with broad geographic ranges surviving an extinction ( \u3e 2500km for genera, \u3e 500km for species) are on average three times greater than narrow-ranging taxa (estimate of odds ratio: 2.8, 95% confidence interval=2.3-3.5), regardless of the prevailing global environmental conditions. The environmental independence of geographic range size extinction selectivity emphasizes the critical role of geographic range size in setting conservation priorities

Senior Recital: Justin Rowan, trumpet

This recital is presented in partial fulfillment of requirements for the degree Bachelor of Music in Music Education. Mr. Rowan studies trumpet with Karin Bliznik.https://digitalcommons.kennesaw.edu/musicprograms/1445/thumbnail.jp

Senior Recital: Melinda Mason, tuba

This recital is presented in partial fulfillment of requirements for the degree Bachelor of Music in Music Education. Ms. Mason studies tuba with Bernard Flythe.https://digitalcommons.kennesaw.edu/musicprograms/1172/thumbnail.jp

Temporal shifts in ostracode sexual dimorphism from the Late Cretaceous to the late Eocene of the U.S. Coastal Plain

Ostracodes of the superfamily Cytheroidea exhibit sexual dimorphism in the carapace such that males are more elongate than females. This sex difference is attributed to the need of the carapace to accommodate the large male copulatory apparatus, and the degree of dimorphism is an indication of male investment in reproduction. In this study, we examine trends in sexual dimorphism, as a proxy for sexual selection, from the Late Cretaceous to the late Eocene to better understand the long-term effects of the Cretaceous/Paleogene mass extinction. We used mixture models to identify sex clusters from digitized outlines of photographed specimens and estimated size and shape dimorphism as the difference in the mean log area and the mean log length-to-height ratio for male and female clusters. We found dimorphism exhibits a phylogenetic signal; families and genera tend to occupy various restricted subsets of dimorphism space. Previous work documented that the mean and variance in size and shape dimorphism decreased sharply at the Cretaceous/Paleogene boundary, and here we show that this fauna only partially returns to Cretaceous dimorphism patterns by the late Eocene. Most surprisingly, species with both high size and shape dimorphism, which occurred in a diverse set of taxa before the extinction, remain rare into the late Eocene. These trends suggest sexual selection may respond to several possible demographic and environmental factors, which warrant further investigation.info:eu-repo/semantics/publishedVersio

Junior Recital: David Anders, French horn

This recital is presented in partial fulfillment of requirements for the degree Bachelor of Music in Performance. Mr. Anders studies French horn with Tom Witte.https://digitalcommons.kennesaw.edu/musicprograms/1532/thumbnail.jp

Junior Recital: Jordan Alfredson, bassoon and John Thomas Burson, trumpet

This recital is presented in partial fulfillment of requirements for the degrees Bachelor of Music in Performance. Mr. Alfredson studies bassoon with Laura Najarian. Mr. Burson studies trumpet with Karin Bliznik.https://digitalcommons.kennesaw.edu/musicprograms/1461/thumbnail.jp

Senior Recital: John Thomas Burson, trumpet

This recital is presented in partial fulfillment of requirements for the degree Bachelor of Music in Performance. Mr. Burson studies trumpet with Douglas Lindsey.https://digitalcommons.kennesaw.edu/musicprograms/1517/thumbnail.jp

Millennial-scale sustainability of the Chesapeake Bay Native American oyster fishery

Estuaries around the world are in a state of decline following decades or more of overfishing, pollution, and climate change. Oysters (Ostreidae), ecosystem engineers in many estuaries, influence water quality, construct habitat, and provide food for humans and wildlife. In North America\u27s Chesapeake Bay, once-thriving eastern oyster (Crassostrea virginica) populations have declined dramatically, making their restoration and conservation extremely challenging. Here we present data on oyster size and human harvest from Chesapeake Bay archaeological sites spanning similar to 3,500 y of Native American, colonial, and historical occupation. We compare oysters from archaeological sites with Pleistocene oyster reefs that existed before human harvest, modern oyster reefs, and other records of human oyster harvest from around the world. Native American fisheries were focused on nearshore oysters and were likely harvested at a rate that was sustainable over centuries to millennia, despite changing Holocene climatic conditions and sea-level rise. These data document resilience in oyster populations under long-term Native American harvest, sea-level rise, and climate change; provide context for managing modern oyster fisheries in the Chesapeake Bay and elsewhere around the world; and demonstrate an interdisciplinary approach that can be applied broadly to other fisheries