6 Works

Coordinates for traces of predation in Meoma tests from San Salvador Island

Carrie Tyler, Troy Dexter, Roger Portell & Michal Kowalewski
Here, we examine interactions between the spatangoid echinoid Meoma ventricosa and the drilling predatory gastropod Cassis tuberosa from a shallow tropical marine habitat (San Salvador Island, Bahamas) to assess the impact of drilling predation on the fossilization potential of echinoids, estimate drilling frequency, characterize drill hole morphology, and evaluate size and site selectivity of predators. Cassid gastropods commonly attack sea urchins today, creating a distinct circular hole in the urchin exoskeleton using the radula, often...

Performance results from species distribution models considering historical occurrences and variables of varying persistency

Jason Bracken
Occurrence data used to build species distribution models often include historical records from locations in which the species no longer exists. When these records are paired with contemporary environmental values that no longer represent the conditions the species experienced, the model creates false associations that hurt predictive performance. The extent of mismatching increases with the number of historical occurrences and with inclusion of environmental variables that are prone to change over time. Indeed, the mismatch...

Echinoid Associated Traces (EAT)

Elizabeth Petsios, Roger Portell, Shamindri Tennakoon, Tobias Grun, Michal Kowalewski, Lyndsey Farrar & Carrie Tyler
Predation traces found on fossilized prey remains can be used to quantify the evolutionary history of biotic interactions. Fossil mollusk shells bearing these types of traces provided key evidence for the rise of predation during the Mesozoic Marine Revolution (MMR), an event which is thought to have reorganized global marine ecosystems. However, predation pressure on prey groups other than mollusks has not been explored adequately. Consequently, the ubiquity, tempo, and synchronicity of the MMR cannot...

Genetic diversity in the threatened freshwater mussel Lampsilis powellii

Ashley Walters, Kristina Taynor & David Berg
North America is home to the greatest share of the world’s freshwater mussel diversity; however, over 70% of its ~300 species are endangered or threatened. Lampsilis powellii, the Arkansas Fatmucket, is endemic to Arkansas and now restricted to upstream reaches of the Ouachita and Saline rivers, but the species is declining within this small range. Conservation actions such as augmenting or reintroducing populations may be necessary, but they require knowledge of the distribution of genetic...

The effects of climate and demographic history in shaping genomic variation across populations of the Desert Horned Lizard (Phrynosoma platyrhinos)

Keaka Farleigh, Sarah A. Vladimirova, Christopher Blair, Jason T. Bracken, Nazila Koochekian, Drew R. Schield, Daren C. Card, Nicholas Finger, Jonathan Henault, Adam D. Leaché, Todd A. Castoe & Tereza Jezkova
Species often experience spatial environmental heterogeneity across their range, and populations may exhibit signatures of adaptation to local environmental characteristics. Other population genetic processes, such as migration and genetic drift, can impede the effects of local adaptation. Genetic drift in particular can have a pronounced effect on population genetic structure during large-scale geographic expansions, where a series of founder effects leads to decreases in genetic variation in the direction of the expansion. Here we explore...

The individual-based network structure of palm-seed dispersers is explained by a rainforest gradient

Pâmela Friedemann, Marina Côrtes, Everaldo Castro, Mauro Galetti, Pedro Jordano &
How species interactions change in space and time is a major question in ecology. In tropical forests, plant individuals share mutualistic partners (pollinators or seed dispersers), yet we have little understanding of the factors affecting these individual interaction patterns. We used a seed dispersal individual-based network describing interactions between individuals of a palm species with bird species to investigate how intrinsic and extrinsic characteristics of individual plants influence the network structure. In our work we...

Registration Year

  • 2021

Resource Types

  • Dataset


  • Miami University
  • Florida Museum of Natural History
  • City University of New York
  • Baylor University
  • Federal Institute of São Paulo
  • Estación Biológica de Doñana
  • Sao Paulo State University
  • University of Washington
  • The University of Texas at Arlington
  • University of Colorado Boulder