Non-Crop (Weed) Species Diversity Index — Main Cropping System Experiment (MCSE)
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.
|Experiment:||Main Cropping System Experiment (MCSE)|
|Data available from:||January 1990 to January 2018|
|year||year the samples were taken|
|replicate||the replicate plot|
|avg h||average Shannon-Weaver H index||dimensionless|
|1990||Alfalfa Cutting 1||T6||R1||0.1645249561291954|
|1990||Alfalfa Cutting 1||T6||R2||0.33660927703648386|
|1990||Alfalfa Cutting 1||T6||R3||0.5841014259720886|
|1990||Alfalfa Cutting 1||T6||R4||0.21258591494041956|
|1990||Alfalfa Cutting 1||T6||R5||0.29626302347739875|