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  1. Dendrochronology and Middle Miocene Petrified Oak: Modern Counterparts and Interpretation

    This study reports the first successful statistical crossdating among many ring width time series from petrified wood, thus providing a replicable continuous annual resolution window into tree growth and...

  2. Amazon Rainforest Microbial Observatory Metagenomes

    79 files of metagenomic DNA sequence data, README file, OTU tables (community matrices), and metadata file for relating sequence files to original samples.

  3. Map-based Probabilistic Infinite Slope Analysis of the Stephens Creek Watershed, Portland, Oregon

    The Stephens Creek Watershed in southwest Portland, Oregon was chosen by the city as a pilot project for urban stream restoration efforts, and the infiltration of stormwater was identified as a potential...

  4. Effects of Arbuscular Mycorrhizal Fungal Infection and Common Mycelial Network Formation on Invasive Plant Competition

    Understanding the biotic factors influencing invasive plant performance is essential for managing invaded land and preventing further exotic establishment and spread. I studied how competition between both...

  5. Field Evaluation of Arbuscular Mycorrhizal Fungal Colonization in Bacillus thuringiensis Toxin-Expressing (Bt) and Non-Bt...

    The cultivation of genetically engineered Bacillus thuringiensis toxin-expressing (Bt) maize continues to increase worldwide, yet the effects of Bt crops on arbuscular mycorrhizal fungi (AMF) in soil are poorly...

  6. History, Current Conditions, and Wetland Restoration at Killin Wetlands Natural Area, Washington County, Oregon

    In September 2014, the Metro Natural Area Program engaged The Wetland Conservancy to develop a scientific assessment of Metro’s 590-acre Killin Wetlands Natural Area. Metro acquired the lands comprising the...

  7. Geogenic Cadmium Pollution and Potential Health Risks, With Emphasis on Black Shale

    Cadmium (Cd) is a non-essential trace element that is toxic to humans. Previous studies of Cd in the environment have primarily focused on pollution resulted from anthropogenic sources, but little is known on...

  8. Decadal Ecosystem Response to an Anomalous Melt Season in a Polar Desert in Antarctica

    Amplified climate change in polar regions is significantly altering regional ecosystems, yet there are few long-term records documenting these responses. The McMurdo Dry Valleys (MDV) cold desert ecosystem is...

  9. Using Critical Physical Geography to Map the Unintended Consequences of Conservation Management Programs

    A variety of conservation trends have gained and lost favor throughout the years in agriculture, with U.S. Farm Bills often influencing what conservation practices are implemented by farming communities...

  10. Slope, Grain Size, and Roughness Controls on Dry Sediment Transport and Storage on Steep Hillslopes

    Existing hillslope sediment transport models developed for low-relief, soil-mantled landscapes are poorly suited to explain the coupling between steep rocky hillslopes and headwater channels. Here we address...

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