Data from: Fuels and fires influence vegetation via above- and below-ground pathways in a high-diversity plant community

1. Fire strongly influences plant populations and communities around the world, making it an important agent of plant evolution. Fire influences vegetation through multiple pathways, both above- and belowground. Few studies have yet attempted to tie these pathways together in a mechanistic way through soil heating even though the importance of soil heating for plants in fire-prone ecosystems is increasingly recognized. 2. Here we combine an experimental approach with structural equation modelling (SEM) to simultaneously examine multiple pathways through which fire might influence herbaceous vegetation. In a high-diversity longleaf pine groundcover community in Louisiana, USA, we manipulated fine-fuel biomass and monitored the resulting fires with high-resolution thermocouples placed in vertical profile above- and belowground. 3. We predicted that vegetation response to burning would be inversely related to fuel load owing to relationships among fuels, fire temperature, duration and soil heating. 4. We found that fuel manipulations altered fire properties and vegetation responses, of which soil heating proved to be a highly accurate predictor. Fire duration acting through soil heating was important for vegetation response in our SEMs, whereas fire temperature was not. 5. Our results indicate that in this herbaceous plant community, fire duration is a good predictor of soil heating and therefore of vegetation response to fire. Soil heating may be the key determinant of vegetation response to fire in ecosystems wherein plants persist by resprouting or reseeding from soil-stored propagules. 6. Synthesis. Our SEMs demonstrate how the complex pathways through which fires influence plant community structure and dynamics can be examined simultaneously. Comparative studies of these pathways across different communities will provide important insights into the ecology, evolution and conservation of fire-prone ecosystems.FireLoggersCombinedData_DRYADData for time and temperature during fire from 48 burned sampling plots divided evenly among two burn-units, along with data for subsequent vegetation response in each of the 48 plots. Time and temperature data were measured by K-type thermocouples attached to HOBO dataloggers. A subset of plots (N=18) include time and temperature measurements in vertical profile taken: 1) 1 cm aboveground, 2) at the soil surface, 3) 1 cm belowground, 4) 2 cm belowground, and 5) 4 cm belowground.SeedBankProjectData_DryadWe examined effects of increased-fuels on post-fire germination from the soil seed-bank in a concurrent experiment at the same study site. This file contains identification information (species, family, growth habit, functional group) for the plants that germinated from seed-bank samples