Assessing the Relationship between Litter + Duff Consumption and Post-Fire Soil Temperature Regimes

The immediate effects of wildland fire on soil have been well documented. However, we know much less about the longer-term effects and their implications for plants. Post-fire soil temperature regimes, for example, have received relatively little research attention, despite potential effects on plan...

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Main Authors: Crystal N. Smith, Donald L. Hagan
Format: Article
Language:English
Published: MDPI AG 2020-11-01
Series:Fire
Subjects:
Online Access:https://www.mdpi.com/2571-6255/3/4/64
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author Crystal N. Smith
Donald L. Hagan
author_facet Crystal N. Smith
Donald L. Hagan
author_sort Crystal N. Smith
collection DOAJ
description The immediate effects of wildland fire on soil have been well documented. However, we know much less about the longer-term effects and their implications for plants. Post-fire soil temperature regimes, for example, have received relatively little research attention, despite potential effects on plant phenology and establishment. Using portable temperature datalogger units (iButtons), we conducted an experimental study to assess how fire severity (measured in terms of litter and duff consumption) influences biologically relevant temperature parameters such as diel minimums, maximums, means, and ranges. We also used these data to calculate cumulative soil growing degree days (GDDs). The study was conducted during the early to mid-spring to capture the transition from dormant season to growing season. Results indicate that mean and max soil temperatures increase in the weeks after fire, with the most pronounced effects in the higher severity treatments. By the end of the 40-day study period, soils in the high severity burn treatment had accumulated 72 GDDs, compared to 17.9, 13.6, and 1.4 in moderate, low, and control treatments, respectively. These findings indicate that fire severity has significant and persistent effects on post-fire soil temperature regimes, and this likely has implications for the post-fire vegetation response.
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spelling doaj.art-19690eea68f94e2ea918bec4cf01570f2023-11-20T20:11:01ZengMDPI AGFire2571-62552020-11-01346410.3390/fire3040064Assessing the Relationship between Litter + Duff Consumption and Post-Fire Soil Temperature RegimesCrystal N. Smith0Donald L. Hagan1Department of Forestry and Environmental Conservation, Clemson University, Clemson, SC 29634, USADepartment of Forestry and Environmental Conservation, Clemson University, Clemson, SC 29634, USAThe immediate effects of wildland fire on soil have been well documented. However, we know much less about the longer-term effects and their implications for plants. Post-fire soil temperature regimes, for example, have received relatively little research attention, despite potential effects on plant phenology and establishment. Using portable temperature datalogger units (iButtons), we conducted an experimental study to assess how fire severity (measured in terms of litter and duff consumption) influences biologically relevant temperature parameters such as diel minimums, maximums, means, and ranges. We also used these data to calculate cumulative soil growing degree days (GDDs). The study was conducted during the early to mid-spring to capture the transition from dormant season to growing season. Results indicate that mean and max soil temperatures increase in the weeks after fire, with the most pronounced effects in the higher severity treatments. By the end of the 40-day study period, soils in the high severity burn treatment had accumulated 72 GDDs, compared to 17.9, 13.6, and 1.4 in moderate, low, and control treatments, respectively. These findings indicate that fire severity has significant and persistent effects on post-fire soil temperature regimes, and this likely has implications for the post-fire vegetation response.https://www.mdpi.com/2571-6255/3/4/64dufffire severitylitterphenologyprescribed firesoil temperature
spellingShingle Crystal N. Smith
Donald L. Hagan
Assessing the Relationship between Litter + Duff Consumption and Post-Fire Soil Temperature Regimes
Fire
duff
fire severity
litter
phenology
prescribed fire
soil temperature
title Assessing the Relationship between Litter + Duff Consumption and Post-Fire Soil Temperature Regimes
title_full Assessing the Relationship between Litter + Duff Consumption and Post-Fire Soil Temperature Regimes
title_fullStr Assessing the Relationship between Litter + Duff Consumption and Post-Fire Soil Temperature Regimes
title_full_unstemmed Assessing the Relationship between Litter + Duff Consumption and Post-Fire Soil Temperature Regimes
title_short Assessing the Relationship between Litter + Duff Consumption and Post-Fire Soil Temperature Regimes
title_sort assessing the relationship between litter duff consumption and post fire soil temperature regimes
topic duff
fire severity
litter
phenology
prescribed fire
soil temperature
url https://www.mdpi.com/2571-6255/3/4/64
work_keys_str_mv AT crystalnsmith assessingtherelationshipbetweenlitterduffconsumptionandpostfiresoiltemperatureregimes
AT donaldlhagan assessingtherelationshipbetweenlitterduffconsumptionandpostfiresoiltemperatureregimes