Moisture dynamics of moss-dominated surface fuel in relation to the structure of Picea abies and Pinus sylvestris stands

Tanskanen, Heidi; Granström, Anders; Venäläinen, Ari; Puttonen, Pasi

doi:10.1016/j.foreco.2006.01.048

Cited by 36 publications

(25 citation statements)

References 29 publications

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“…Thus, this is associated with a change in fuel type i.e. an increase in spruce saplings and their high ability to burn (Tanskanen et al 2006). It is interesting to note that once Picea becomes established the fire frequency shifts to the lowest value recorded in Sudenpesä (approximately 510 years).…”

Section: The Local Establishment Of Picea Abiesmentioning

confidence: 99%

Holocene stand-scale vegetation dynamics and fire history of an old-growth spruce forest in southern Finland

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Seppä

Kuosmanen

et al. 2015

Veget Hist Archaeobot

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Forest vegetation composition, including\ud dominant keystone species and floristic diversity, is driven\ud by natural and anthropogenic disturbances. Disentangling\ud these complex interactions to identify the role of species\ud competition, climate and disturbances in boreal forest dynamics\ud is challenging. Here, pollen and charcoal data are\ud used to reconstruct Holocene vegetation and fire history at\ud the local stand-scale within an old-growth Picea abies\ud (Norway spruce) forest hollow in southern Finland. The\ud aim is to reconstruct vegetation history with specific emphasis\ud on the mid-Holocene expansion of Picea and the\ud decline in deciduous species in relation to fire history.\ud Early-Holocene forest development and vegetation dynamics\ud are primarily driven by climatic variations. The\ud spread of Picea at approximately 5,200 cal BP does not\ud coincide with local natural or anthropogenic disturbance or\ud a decline in deciduous species and is consistent with its\ud regional expansion, suggesting climate as the most likely\ud control over the late establishment of this taxon. The mid-\ud Holocene decline in deciduous species corresponds to an\ud increased fire frequency suggesting a higher anthropogenic\ud disturbance (also considered as the primary reason for the\ud loss of floristic diversity in southern Finland). The ‘natural’\ud fire frequency in this local stand-scale boreal forest is lower\ud than that observed in the recent past (i.e. the time of significant\ud anthropogenic impact), yet the present-day absence\ud or low frequency of fire remains within the range of natural\ud variability observed during the early- and mid-Holocen

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Section: The Local Establishment Of Picea Abiesmentioning

confidence: 99%

Holocene stand-scale vegetation dynamics and fire history of an old-growth spruce forest in southern Finland

Clear

Seppä

Kuosmanen

et al. 2015

Veget Hist Archaeobot

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“…Voss), interception of water by trees led to finescale variation in duff moisture content (Raaflaub and Valeo 2008), but this was not seen in trembling aspen (Populus tremuloides Michx) forest. Tanskanen et al (2006) examined FMC in pine (Pinus sylvestris L.) stands ranging in age from 0 to 60 years and canopy cover from 7 to 74%. Fuels in younger, more open stands were consistently drier than those in older stands, and drying rates were higher in younger stands.…”

Section: Field Measurementsmentioning

confidence: 99%

Dead fuel moisture research: 1991–2012

Matthews¹

2014

Int. J. Wildland Fire

176

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Abstract. The moisture content of dead fuels is an important determinant of many aspects of bushfire behaviour. Understanding the relationships of fuel moisture with weather, fuels and topography is useful for fire managers and models of fuel moisture are an integral component of fire behaviour models. This paper reviews research into dead fuel moisture for the period 1991-2012. The first half of the paper deals with experimental investigation of fuel moisture including an overview of the physical processes that affect fuel moisture, laboratory measurements used to quantify these processes, and field measurements of the dependence of fuel moisture on weather, vegetation structure and topography. The second set of topics examine models of fuel moisture including empirical models derived from field measurements, process-based models of vapour exchange and fuel energy and water balance, and experimental testing of both types of models. Remaining knowledge gaps and future research problems are also discussed. Opportunities for exciting research in the future exist for basic fuel moisture processes, developing new methods for applying models to fire behaviour prediction, and linking fuel moisture and weather forecast models.

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“…Forest composition and structure influence both microclimatic conditions [9,10] and fuel structure and quantity [11], hence, fire behavior and effects. Stand structure determines in-stand wind speed profile [12,13], solar radiation [10], and dead fuel moisture content [14,15]. Dry, wind-exposed, low (either open or dense) Mediterranean forest types experience fast-spreading, high-intensity crown fire [11].…”

Section: Introductionmentioning

confidence: 99%

Microclimate and Modeled Fire Behavior Differ Between Adjacent Forest Types in Northern Portugal

Pinto

Fernandes

2014

Forests

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Fire severity varies with forest composition and structure, reflecting micrometeorology and the fuel complex, but their respective influences are difficult to untangle from observation alone. We quantify the differences in fire weather between different forest types and the resulting differences in modeled fire behavior. Collection of in-stand weather data proceeded during two summer periods in three adjacent stands in northern Portugal, respectively Pinus pinaster (PP), Betula alba (BA), and Chamaecyparis lawsoniana (CL). Air temperature, relative humidity and wind speed varied respectively as CL < PP < BA, PP < CL < BA, and CL < BA < PP. Differences between PP and the other types were greatest during the warmest and driest hours of the day in a sequence of 10 days with high fire danger. Estimates of daytime moisture content of fine dead fuels and fire behavior characteristics for this period, respectively, from Behave and BehavePlus, indicate a CL < BA < PP gradient in fire potential. High stand density in CL and BA ensured lower wind speed and higher fuel moisture content than in PP, limiting the likelihood of an extreme fire environment. However, regression tree analysis revealed that the fire behavior distinction between the three forest types was primarily a function of the surface fuel complex, and more so during extreme fire weather conditions. OPEN ACCESSForests 2014, 5 2491

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Moisture dynamics of moss-dominated surface fuel in relation to the structure of Picea abies and Pinus sylvestris stands

Cited by 36 publications

References 29 publications

Holocene stand-scale vegetation dynamics and fire history of an old-growth spruce forest in southern Finland

Holocene stand-scale vegetation dynamics and fire history of an old-growth spruce forest in southern Finland

Dead fuel moisture research: 1991–2012

Microclimate and Modeled Fire Behavior Differ Between Adjacent Forest Types in Northern Portugal

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