University of Minnesota
University of Minnesota
College of Biological Sciences


Experiment 116 - Simplification/functional groups

This experiment was designed to manipulate grassland functional groups to test for effects on ecosystem functioning and higher trophic levels. In 1993, 50 4x8m plots were set up in Field C, adjacent to e001 and other experiments. Field C was abandoned from agriculture in 1934 and had reverted to mixed grassland. Twelve experimental treatments were applied to plots in a completely randomized design. Functional groups were designated as C3 grasses, C4 grasses and forbs and were selectively removed from plots to create all possible combination of 1, 2 or 3 functional groups remaining. Two additional treatments were created by randomly removing either 25% or 55% of the vegetation in a plot and three more treatments were created by planting Poa pratensis, Solidago rigida, or Schizachyrium scoparium in monocultures. Each treatment had 4 replicates, with the control (no plants removed) having 6 replicates. Plants were initially removed by killing them either by hand-painting leaves with a non-selective herbicide (Roundup, Monsanto), or by spraying with a selective herbicide (AMINE 4-Platte Chemical Co.-for forbs, Poast Plus-BASF Corp to remove graminoids). All of these herbicides should be non-toxic to insects. Some herbicide was used again in early 1994, but thereafter treatments were maintained by hand weeding from elevated platforms. Plots were burned in May, 1994.

Methods for e116


Dataset IDTitleRange of Years (# years with data)
abve116Arthropod D-Vac Sampling: Simplification/functional groups1995-1995 (1 year)