8 Works

Data from: Differential introgression and the maintenance of species boundaries in an advanced generation avian hybrid zone

Jennifer Walsh, W. Gregory Shriver, Brian J. Olsen & Adrienne I. Kovach
Background: Evolutionary processes, including selection and differential fitness, shape the introgression of genetic material across a hybrid zone, resulting in the exchange of some genes but not others. Differential introgression of molecular or phenotypic markers can thus provide insight into factors contributing to reproductive isolation. We characterized patterns of genetic variation across a hybrid zone between two tidal marsh birds, Saltmarsh (Ammodramus caudacutus) and Nelson’s (A. nelsoni) sparrows (n = 286), and compared patterns of...

Data from: Phytoplankton responses to nitrogen enrichment in Pacific Northwest, USA mountain lakes

Jason J. Williams, Marc Beutel, Andrea Nurse, Stephanie E. Hampton, Jasmine E. Saros & Barry Moore
Limited information is available about threshold lake nitrogen concentrations necessary to stimulate phytoplankton species and biomass responses in remote nitrogen-limited mountain lakes. We conducted in situ enrichment bioassays in mountain lakes within Mount Rainier, North Cascades, and Olympic National Parks in Washington State, USA to characterize phytoplankton species and biomass responses to nitrogen enrichment, and associated dissolved inorganic nitrogen (DIN) concentration thresholds. Based on biomass and growth measurements, phytoplankton were nitrogen-limited or co-limited by nitrogen...

Data from: The genetics of extreme microgeographic adaptation: an integrated approach identifies a major locus underlying leaf trichome divergence in Yellowstone Mimulus guttatus

Margaret F. Hendrick, Findley R. Finseth, Minna E. Mathiasson, Kristen A. Palmer, Emma M. Broder, Peter Breigenzer & Lila Fishman
Microgeographic adaptation provides a particularly interesting context for understanding the genetic basis of phenotypic divergence, and may also present unique empirical challenges. In particular, plant adaptation to extreme soil mosaics may generate barriers to gene flow or shifts in mating system that confound simple genomic scans for adaptive loci. Here, we combine three approaches - QTL mapping of candidate intervals in controlled crosses, population resequencing (PoolSeq), and analyses of wild recombinant individuals - to investigate...

Data from: A revision of the Leptogium saturninum group in North America

Daphne F. Stone, James W. Hinds, Frances L. Anderson & James C. Lendemer
A revision of the North American members of the Leptogium saturninum group (i.e. species with long lower-surface hairs, isidia, and usually smooth upper surface) is presented based on molecular phylogenetic analyses of mtSSU and nrITS sequence data, together with an extensive morphological study. Three species supported by both molecular and morphological characteristics are recognized: L. acadiense sp. nov. (distinguished by granular saturninum-type isidia, medulla composed of irregularly arranged or perpendicular hyphae), L. cookii sp. nov....

Data from: Abiotic proxies for predictive mapping of near-shore benthic assemblages: implications for marine spatial planning

Jennifer McHenry, Robert S. Steneck & Damian C. Brady
Marine spatial planning (MSP) should assist managers in guiding human activities towards sustainable practices and in minimizing user-conflicts in our oceans. A necessary first step is to quantify spatial patterns of marine assemblages in order to understand the ecosystem’s structure, function, and services. However, the large spatial scale, high economic value, and density of human activities in near-shore habitats often makes quantifying this component of marine ecosystems especially daunting. To address this challenge, we developed...

Data from: Intoxicated copepods: ingesting toxic phytoplankton leads to risky behaviour

Rachel S. Lasley-Rasher, Kathryn Nagel, Aakanksha Angra & Jeannette Yen
Understanding interactions between harmful algal bloom (HAB) species and their grazers is essential for determining mechanisms of bloom proliferation and termination. We exposed the common calanoid copepod, Temora longicornis to the harmful algal bloom species Alexandrium fundyense and examined effects on copepod survival, ingestion, egg production and swimming behaviour. A. fundyense was readily ingested by T. longicornis and significantly altered copepod swimming behaviour without affecting copepod survival or fitness. A. fundyense caused T. longicornis to...

Data from: Density-dependent vulnerability of forest ecosystems to drought

Alessandra Bottero, Anthony W. D'Amato, Brian J. Palik, John B. Bradford, Shawn Fraver, Michael A. Battaglia, Lance A. Asherin & Mike A. Battaglia
Climate models predict increasing drought intensity and frequency for many regions, which may have negative consequences for tree recruitment, growth, and mortality, as well as forest ecosystem services. Furthermore, practical strategies for minimizing vulnerability to drought are limited. Tree population density, a metric of tree abundance in a given area, is a primary driver of competitive intensity among trees, which influences tree growth and mortality. Manipulating tree population density may be a mechanism for moderating...

Data from: Evidence of small-scale spatial structuring of phytoplankton alpha- and beta-diversity in the open ocean

Erik Askov Mousing, Katherine Richardson, Jørgen Bendtsen, Ivona Cetinić & Mary Jane Perry
Phytoplankton assemblages in the open ocean are usually assumed to be mixed on local scales unless large semi-permanent density discontinuities separating water masses are present. Recent modelling studies have, however, suggested that ephemeral submesoscale oceanographic features leading to only subtle density discontinuities may be important for controlling phytoplankton alpha- and beta-diversity patterns. Until now, no empirical evidence has been presented to support this hypothesis. Using hydrographic and taxonomic composition data collected near Iceland during the...

Registration Year

  • 2016

Resource Types

  • Dataset


  • University of Maine
  • University of Montana
  • University of Vermont
  • Goddard Space Flight Center
  • University of Minnesota
  • United States Department of Agriculture
  • University of Delaware
  • Georgia Institute of Technology
  • Purdue University
  • University of Copenhagen