Co-dominant removal and N and C fertilization experiment for moist meadow tundra, 2002 - 2018.

In 2002 seven experimental sites were set up in areas of moist meadow
alpine tundra on Niwot Ridge. At each site, ten 1 m^2 plots were
established where there was roughly even cover by two dominant plant
species, Geum rossii (forb) and Deschampsia cespitosa (grass). In a
factorial design, plots were assigned treatments of 1) removal of G.
rossii, D. cespitosa, or control (no plant removal), and 2) nutrient
addition of nitrogen (N), carbon (C), or control (no addition). A
tenth plot was assigned a treatment of random biomass removal and no
nutrient addition. Plots were visited annually to implement removal
and fertilization treatments, and to measure plant species
composition. Plant productivity was measured every other year and
nematode communities once via 18S rRNA metabarcoding, together with
soils. Carbon addition plots were dropped from the experiment in 2016.