Nitrogen niche partitioning between tropical legumes and grasses conditionally weakens under elevated CO2

Plant community biodiversity can be maintained, at least partially, by shifts in species interactions between facilitation and competition for resources as environmental conditions change. These interactions also drive ecosystem functioning, including productivity, and can promote over-yielding- an ecosystem service prioritized in agro-ecosystems, such as pastures, that occurs when multiple species together are more productive than the component species alone. Importantly, species interactions that can result in over-yielding may shift in response to rising CO2 concentrations and changes in resource availability, and the consequences these shifts have on production is uncertain especially in the context of tropical mixed-species grasslands.
We examined the relative performance of two species pairs of tropical pasture grasses and legumes growing in monoculture and mixtures in a glasshouse experiment manipulating CO2. We investigated how over-yielding can arise from nitrogen (N) niche par..., These data were collected as part of a glasshouse experiment run at the Hawkesbury Institute for the Environment at Western Sydney University lead by A. Churchill (the first author). Detailed methods associated with the experimental design may be found in the linked manuscript and eventual published paper, however in brief:
Plants were grown in ambient and elevated CO2 (+220 ppm) glasshouse chambers (6 in total, 3 for each CO2 treatment). Plants were grown either in monoculture (2 individuals each) or in mixture (1 individual of two species; a legume and a grass) for two pairs of grass-legumes. All plant species are common tropical forages, frequently grown together in field condiitons in Eastern Australia and elsewhere around the globe. Specific species include Macroptilium bracteatum (Nees. & Marti.) growing with the grass Chloris gayana (Kunth), and the legume Desmodium intortum (Mill) Urb with grass Panicum maximum var. trichoglume (Robyns). The experimental design therefore inc..., All files included here are .csv files that can be opened with any standard spreadsheet reader. Original data analysis was conducted using R, and scripts associated with this analysis may be accessed through the corresponding author., # Data for: Nutrient niche partitioning between tropical legumes and grasses conditionally weakens under elevated CO2

These data were collected as part of a glasshouse experiment run at the Hawkesbury Institute for the Environment at Western Sydney University lead by A. Churchill (the first author). Detailed methods associated with the experimental design may be found in the linked manuscript and eventual published paper and in the associated 'Methods' description on Dryad

Details for the types of data included in each file, as well as explanations for abbreviations and units are included in this file for use by others

## Dataset: AGPotData

This dataset includes all data collected from plant shoots as part of the experiment described in associated publications. Columns represent multiple types of measurements on the same plant, where each row is a unique plant that can be linked by the pot number (PotNum) to data in other datasets (note that these are aggregated to all plants within...