5 Works

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...

Genome-wide RAD sequencing resolves the evolutionary history of serrate leaf Juniperus and reveals discordance with chloroplast phylogeny

Kathryn Uckele, Robert Adams, Thomas Parchman & Andrea Schwarzbach
Juniper (Juniperus) is an ecologically important conifer genus of the Northern Hemisphere, the members of which are often foundational tree species of arid regions. The serrate leaf margin clade is native to topologically variable regions in North America, where hybridization has likely played a prominent role in their diversification. Here we use a reduced-representation sequencing approach (ddRADseq) to generate a phylogenomic data set for 68 accessions representing all 22 species in the serrate leaf margin...

Data for: Freeze tolerance influenced forest cover and hydrology during the Pennsylvanian

William Matthaeus, Sophia I. Macarewich, Jon D. Richey, Jonathan P. Wilson, Jennifer C. McElwin, Isabel P. MontaƱez, William A. DiMichele, Michael T. Hren, Christopher J. Poulsen & Joseph D. White
Global forest cover affects the Earth system by altering surface mass and energy exchange. Physiology determines plant environmental limits and influences geographical vegetation distribution. Ancient plant physiology, therefore, likely affected vegetation-climate feedbacks. We combine climate modeling and ecosystem-process modeling to simulate arboreal vegetation in the late Paleozoic ice age. Using GENESIS V3 GCM simulations, varying pCO2, pO2, and ice extent for the Pennsylvanian, and fossil-derived leaf C:N, maximum stomatal conductance, and specific conductivity for several...

Data from: Compensatory dynamics of lotic algae break down nonlinearly with increasing nutrient enrichment

Stephen Cook
One important mechanism governing the temporal maintenance of biodiversity is asynchrony in cooccurring competitors due to fluctuating environments (i.e. compensatory dynamics). Temporal niche partitioning has evolved in response to predictable oscillations in environmental conditions so that species may offset competition, but we do not yet have a clear understanding of how novel anthropogenic stressors alter seasonal patterns of succession. Many primary producers are nutrient-limited, and enrichment may decrease the importance of environmental fluctuations that govern...

The effects of salinity and N:P on N-rich toxins by both an N-fixing and non-N-fixing cyanobacteria

Felicia Osburn, Nicole Wagner, Raegyn Taylor, Kevin Chambliss, Bryan Brooks & Thad Scott
Freshwater ecosystems are experiencing increased salinization. Adaptive management of harmful algal blooms (HABs) contribute to eutrophication/salinization interactions through the hydrologic transport of blooms to coastal environments. We examined how nutrients and salinity interact to affect growth, elemental composition, and cyanotoxin production/release in two common HAB genera. Microcystis aeruginosa (non-nitrogen (N)-fixer and microcystin-LR producer; MC-LR) and Aphanizomenon flos-aquae (N-fixer and cylindrospermopsin producer; CYN) were grown in N:phosphorus (N:P) 4 and 50 (by atom) for 21 and...

Registration Year

  • 2021
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Resource Types

  • Dataset
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Affiliations

  • Baylor University
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  • University of Michigan-Ann Arbor
    1
  • University of Nevada Reno
    1
  • Smithsonian Institution
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  • University of Connecticut
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  • The University of Texas Rio Grande Valley
    1
  • Florida Museum of Natural History
    1
  • Trinity College Dublin
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  • Haverford College
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  • Miami University
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