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Native-invasive spatial seed aggregation competition trials
Version 2 2020-04-28, 01:49
Version 1 2020-04-28, 01:48
dataset
posted on 2020-04-28, 01:49 authored by Calvin ChoCalvin Cho, Jenna BraunJenna Braun, Malory OwenMalory Owen, Nargol GhazianNargol Ghazian, cj lortiecj lortiePurpose
To explore spatial pattern, provenance, and interactions between seeds and with a mimic exotic in a controlled context.
Hypothesis
Spatial aggregeation of seeds shifts the net outcome of native-exotic interactions.
Predictions
- Increased seed aggregated increases competitive interactions intra and inter-specifically.
- Native seeds can outcompete an invasive species at some seed aggregations.
- One of the key effects of the invasive species brome is physical interference (tested by a mimic plant and by measuring light levels in competition).
Design
Two species tested. Phacelia tancetifolia and Bromus rubens. Greenhouse trials, full-spectrum light, 15cm pots. A total of 8 weeks experimentation, and fixed density series with replacement at 10 seeds per pot. The aggregation of seed was clumped or dispersed in sowing for each species in mixture and monocultures.
