Browsing by Subject "plants"

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Historical plant and fungal nitrogen isotopes and concentrations from Minnesota, USA, 1871–2016
    (2023-11-06) Michaud, Talia J; micha938@umn.edu; Michaud, Talia J; University of Minnesota Kennedy Lab
    Historical declines in plant tissue nitrogen concentrations and d15N have been interpreted as evidence of declining terrestrial ecosystem nitrogen status. To test whether plant mycorrhizal type influences trajectories of plant nitrogen status, and whether fungi also exhibit declining nitrogen status, we analyzed herbarium collections made in MN, USA, from 1871–2016.
  • Thumbnail Image
    Item
    The Risk to Native Minnesota Beach Grass, Ammophilia breviligulata, Posed by Historical Restoration Efforts that Used Michigan Plants.
    (2006) Anderson, Rebecca; Etterson, Julie
    There is mounting concern over the source and genetic history of plants used in restoration projects. This is because genetic mixing between remnant native plants and introduced nonlocal plants can have positive or negative effects on population fitness. In the past, nonlocal beach grass, Ammophila breviligulata, from Michigan were planted near remnant native populations at Park Point in Duluth as a component of dune restoration. This publication reports on efforts to assess the potential impact of these historical plantings. The authors conclude that Michigan genotypes may outcompete or swamp threatened Minnesota genotypes as a result of vegetative and reproductive fitness advantages. If Michigan plants begin to dominate Park Point, there will be an overall loss of genetic diversity. The authors recommend that local genotypes be used for all future dune restoration projects at Park Point.
  • Thumbnail Image
    Item