Non-Crop (Weed) Species Diversity Index

Average species diversity as computed by the Shannon-Weaver H index based on the biomass of each species compared to the total biomass per station. This dataset is based on Non Crop Biomass.

This datatable is part of the Annual Net Primary Production on the Main Cropping System Experiment dataset. Aboveground annual net primary production (ANPP) has been measured on the LTER main site since 1990 and on the successional and forested sites since 1993. ANPP is measured at peak biomass for a given treatment. In some systems with multiple harvests or complex communities that have peaks occurring at different times of the year, measurements are taken at multiple times per year. Additional ANPP measurements are made where appropriate using leaf litter traps, estimates of diameter from tree basal diameter and for the poplar treatment occasional destructive harvests. See the ANPP protocol for descriptions of the sampling and measurement methods for each of the treatments.

Note

Experiment: Main Cropping System Experiment (MCSE)
Data available from: January 1990 to January 2016
Dataset: KBS019
Datatable ID: KBS019-014.74
Core Areas Populations,Disturbance
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Last Updated 2017-10-24
Variate Description Units
year year the samples were taken
campaign sample campaign
treatment treatment sampled
replicate the replicate plot
avg h average Shannon-Weaver H index dimensionless

Data Excerpt

year campaign treatment replicate avg_h
1990 Alfalfa Cutting 1 T6 R1 0.164524956129195
1990 Alfalfa Cutting 1 T6 R2 0.336609277036484
1990 Alfalfa Cutting 1 T6 R3 0.584101425972089
1990 Alfalfa Cutting 1 T6 R4 0.21258591494042
1990 Alfalfa Cutting 1 T6 R5 0.296263023477399
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