Filters: partyWithName: Daniel R LeCain (X)
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Elevated CO2 effects on semi-arid grassland plants in relation to water availability and competition
1. It has been suggested that much of the elevated CO2 effect on plant productivity and N cycling in semi-arid grasslands is related to a CO2-induced increase in soil moisture, but the relative importance of moisture-mediated and direct effects of CO2 remain unclear. 2. We grew five grassland species common to the semi-arid grasslands of northern Colorado, USA, as monocultures and as mixtures of all five species in pots. We examined the effects of atmospheric CO2 concentration (ambient vs. 780 p.p.m.) and soil moisture (15 vs. 20% m/m) on plant biomass and plant N uptake. Our objective was to separate CO2 effects not related to water from water-mediated CO2 effects by frequently watering the pots, thereby eliminating...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: C3 and C4 grasses,
Functional Ecology,
elevated atmospheric CO2,
forbs,
greenhouse experiment,
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