2002
DOI: 10.1139/x01-200
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Microclimatic and soil moisture responses to gap formation in coastal Douglas-fir forests

Abstract: The effects of gap formation on solar radiation, soil and air temperature, and soil moisture were studied in mature coniferous forests of the Pacific Northwest, U.S.A. Measurements were taken over a 6-year period in closedcanopy areas and recently created gaps in four stands of mature (90-140 years) and old-growth (>400 years) Douglasfir (Pseudotsuga menziesii (Mirb.) Franco) forest in the western Cascade Range of central Oregon and southern Washington. Gap sizes ranged from 40 to 2000 m 2 . Summer solar radia… Show more

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Cited by 267 publications
(275 citation statements)
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References 44 publications
(51 reference statements)
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“…1). These find ings are in accordance with Gray et al (2002) in gap sizes that ranged from 40 to 2000 m 2 in mature Douglas-fir forests in the Pacific Northwest (USA). In a different way, according to the studies of McGuire et al (2001) and Gagnon et al (2003) in Pinus palustris stands in Florida and Georgia (USA), soil moisture did not vary from the gap edge to gap centre when drought condi tions prevailed.…”
Section: Soil Moisturesupporting
confidence: 86%
See 1 more Smart Citation
“…1). These find ings are in accordance with Gray et al (2002) in gap sizes that ranged from 40 to 2000 m 2 in mature Douglas-fir forests in the Pacific Northwest (USA). In a different way, according to the studies of McGuire et al (2001) and Gagnon et al (2003) in Pinus palustris stands in Florida and Georgia (USA), soil moisture did not vary from the gap edge to gap centre when drought condi tions prevailed.…”
Section: Soil Moisturesupporting
confidence: 86%
“…Treefall gap disturbances are important to the species dynamics of many forest types (Pickett & White 1985, Platt & Strong 1989. In addition, gaps are important in maintaining and enhancing biological di versity (Fenner 1985, Denslow 1987, Whit more 1989, Brokaw & Scheiner 1989, Poulson & Platt 1989, Busing & White 1997, Coates & Burton 1997, Gray et al 2002.…”
Section: Introductionmentioning
confidence: 99%
“…Similar results have been reported for other spruce forests (Nilsen and Strand, 2008;Vranova et al, 2009) and other forest ecosystems (Brumme, 1995;Sullivan et al, 2008;Tang et al, 2005b). Reductions in R s rate by forest thinning are linked to thinninginduced changes in microclimate (Galhidy et al, 2006;Gray et al, 2002), substrate availability (Selig et al, 2008;Zu et al, 2009), soil microbes (Arunachalam and Arunachalam, 2000;Zhang and Zak, 1998), and fine roots (Peng and Thomas, 2006;Tang et al, 2005b).…”
Section: The Effect Of Thinning On R S Ratesupporting
confidence: 76%
“…In the terrestrial ecosystem, R s rate is profoundly influenced by both biotic 2010). Thinning may affect R s rate by influencing root biomass (Brumme, 1995;Peng and Thomas, 2006;Tang et al, 2005b), soil microclimate (Galhidy et al, 2006;Gray et al, 2002;Pang et al, 2013), belowground C allocation (Selig et al, 2008;Tian et al, 2010;Zu et al, 2009), and microbial community structure (Arunachalam and Arunachalam, 2000;Zhang and Zak, 1998;Zu et al, 2009). Thinning may cause the immediate decrease in R s rate due to the decrease in respiration from tree roots (Tang et al, 2005b).…”
Section: Introductionmentioning
confidence: 99%
“…Trees directly modify microclimatic conditions on the forest floor (Pukkala et al 1993;Canham et al 1994;Parker 1997;Gray et al 2002), exert influence on characteristics of the soil through root systems and litter-fall (Hirabuki 1991;Liski 1995;Dieffenbach, Matzner 2000;Hinsinger et al 2003), change physical and chemical properties of precipitation (Janek 2002), and form habitats for animals and forest floor vegetation (Paluch 2005b). Therefore, it seems likely that the spatial pattern of trees also affects the spatial pattern of regeneration.…”
mentioning
confidence: 99%