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Experiments
Experiment 120 - Biodiversity II: Effects of Plant Biodiversity on Population and Ecosystem Processes
Biodiversity II (E120) is designed to determine how the number of plant species affects the dynamics of ecological processes at the population, community, and ecosystem levels. By experimentally manipulating the number of species and the kinds of species, the amount of plant growth and the change from year to year, that result can be examined. Plots are large (9m x 9m actively maintained) and well-replicated, allowing responses of plant pathogens, insect herbivores, seed predators, soil parameters, invasive plant species and other variables to also be studied. Plots were seeded in May 1994 to have 1, 2, 4, 8, or 16 species, with roughly 30 replicates of each diversity level. The species composition of each plot was chosen by random draw from a pool of 18 grassland perennials that included four warm-season (C4) grasses, four cool-season (C3) grasses, four legumes, four non-legume forbs, and two woody species. All species occur in monoculture allowing comparison of responses of each species in monoculture to combinations of these same species. The experiment was established in 1994 by the lead investigators David Tilman, Peter Reich, Johannes Knops, and David Wedin. Experiment 120 is similar to Experiment 123, but it uses larger plots to provide a large capacity for long-term subexperiments.
Methods for e120
Datasets
Dataset ID | Title | Range of Years (# years with data) |
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acqe120 | Developing seedheads treated with fungicide and insecticide | 2005-2005 (1 year) |
aghe120 | Fire Behavior | 1997-2014 (9 years) |
agge120 | Fire Fuel Load | 2015-2015 (1 year) |
agfe120 | Fire Severity | 2011-2014 (2 years) |
agie120 | Fire Temperatures | 2000-2014 (4 years) |
invre120 | Invasion strip root biomass | 2002-2002 (1 year) |
invne120 | Invasion strip soil nitrogen | 2002-2002 (1 year) |
acve120 | Local plant diversity and soybean biological control 2011 Aphid and Enemy Surveys | 2011-2011 (1 year) |
acxe120 | Local plant diversity and soybean biological control 2011 Harvest Measures | 2011-2011 (1 year) |
acwe120 | Local plant diversity and soybean biological control 2012 Aphid Surveys | 2012-2012 (1 year) |
adce120 | Local plant diversity and soybean biological control 2012 Enemy Surveys | 2012-2012 (1 year) |
aage120 | Main Plots All Arthropod Insect Sweepnet Sampling 1996-2006 | 1996-2006 (10 years) |
lpe120 | Percent light penetration | 1996-2000 (5 years) |
nbe120 | Plant aboveground biomass carbon and nitrogen | 1996-2006 (7 years) |
ple120 | Plant aboveground biomass data | 1996-2020 (25 years) |
pce120 | Plant species percent cover data | 1996-2007 (6 years) |
aafe120 | Plant traits | 2008-2008 (1 year) |
agje120 | Plot coordinates for the E120 Big Biodiversity Field | 1994-1994 (1 year) |
rbe120 | Root biomass data | 1997-2015 (10 years) |
nre120 | Root carbon/nitrogen data | 1997-2006 (6 years) |
care120 | Soil carbon | 1994-2017 (8 years) |
nohe120 | Soil nitrate and ammonium | 1996-2007 (7 years) |
ne120 | Soil nitrogen | 1994-2017 (8 years) |
aime120 | Soil phosphorus | 1994-2017 (2 years) |
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Compiled data is also available in these pre-formatted files.