Tree regeneration following clearcut logging in red fir forests of California

Barbour, Michael G.; Fernau, Robert F.; Benayas, José María Rey; Jurjavcic, N; Royce, E. B.

doi:10.1016/s0378-1127(97)00244-2

Cited by 41 publications

(4 citation statements)

References 9 publications

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“…At our study site, red fir seedlings were associated with thicker Cr horizon microsites, in contrast to our hypothesis that the thickness of the A + C horizon is more important than deeper weathered bedrock for regeneration of this species. In red fir forests of the Sierra Nevada, red fir seedling and sapling cover was correlated with total soil depth in clearcut areas where regeneration was defined as 'very slow' (Barbour et al 1998). In the southern Sierra Nevada, roots of ponderosa pine (P. ponderosa Laws.)…”

Section: Discussionmentioning

confidence: 99%

“…are considered indicative of shallow and exposed mineral soils (Vasek 1978;North et al 2002). Seedlings of red fir, sugar pine, and incense-cedar also have greater occurrence and survivorship in moister, cooler, less exposed (Barbour et al 1990;Gray et al 2005), and deeper (red fir; Barbour et al 1998) soil microsites. In contrast, shrubs and Jeffrey pines may effectively colonize and grow on shallow mineral soils by developing more extensive root systems (Royce and Barbour 2001) or extracting moisture from weathered bedrock during the hot and dry summer months (Hubbert et al 2001a, b;Rose et al 2002;Witty et al 2003).…”

Section: Introductionmentioning

confidence: 99%

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Influence of soil thickness on stand characteristics in a Sierra Nevada mixed-conifer forest

et al. 2007

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Soil thickness can be an important factor influencing vegetation, yet few spatiallyexplicit studies have examined soil horizon thickness and vegetation composition in summerdrought forests. We compared seismic and soil penetration measurements of combined A + C and Cr horizon thickness, soil moisture and temperature, and stand variables in a contiguous 4-ha mixed-conifer stand of the Sierra Nevada. Thickness of A + C and Cr horizons were highly variable but were not correlated to each other. Total basal area and canopy cover were positively related with A + C horizon thickness, and shrub cover was positively related with Cr horizon thickness. Basal area of white fir [Abies concolor (Gord and Glend) Lindl.] and incense-cedar [Calocedrus decurrens (Torrey) Florin] were positively correlated with A + C horizon thickness, but there was no relationship between A + C or Cr horizon thickness and basal area of Jeffrey pine (Pinus jeffreyi Grev. and Balf.), sugar pine (P. lambertiana Douglas), or red fir (A. magnifica A. Murray). Both white and red fir seedlings were associated with decreased soil temperature, but only white fir seedlings were positively associated with soil moisture. Soil penetration estimates of soil thickness were similar to seismic estimates for shallow soils (<50 cm depth) but were poorly related on deeper soils. Visual surface conditions and tile probe estimates of soil thickness can be highly misleading because 'shallow' areas may have a thick layer of weathered bedrock that can serve as a potential rooting medium for deep-rooted trees and shrubs. In our study only the refraction seismic method had the potential to measure total soil depth that included A + C and Cr horizon thickness.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of soil thickness on stand characteristics in a Sierra Nevada mixed-conifer forest

et al. 2007

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“…The Californian landscape and associated waterways have experienced profound modification during the last 150 years. Widespread logging in the Sierra Nevada (Mudie & Byrne 1980; Barbour et al 1998) increased watershed erosion and the delivery of sediment to rivers (Lewis 1998). Hydraulic gold mining in the Sierra Nevada during the years 1852-1883 had a devastating impact as slopes were destabilized, river channels redirected and aggraded, and the San Francisco Bay (SFB) estuary aggraded and disturbed (Gilbert 1917;Nichols et al 1986;Jaffe et al 1998).…”

Section: Regional Context and Study Areamentioning

confidence: 99%

A palaeoenvironmental reconstruction to aid in the restoration of floodplain and wetland habitat on an upper deltaic plain, California, USA

Brown

Pasternack

2005

Envir. Conserv.

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While tens of millions of dollars have been spent on land acquisition and planning for current and future floodplain and wetland restoration in the Sacramento-San Joaquin Delta, knowledge of the historical processes and landscape heterogeneity that are helpful in guiding the environmental restoration are often scarce. This study used palaeoenvironmental reconstruction to increase the historical perspective, with the aim of improving environmental management. Twelve sediment cores collected from the McCormack-Williamson Tract (MWT) leveed farmland and the juxtaposed Delta Meadows (DM) tidal wetland were sampled for a suite of environmental proxies. MWT was a non-tidal flood plain during much of the late-Holocene, with a mosaic of other habitats including dry uplands, riparian forests, and freshwater wetlands persisting nearby. Comparison with the regional sea-level history suggests that the upper delta gradually came under tidal influence 3000–800 calendar years before present (cal BP). Despite this, floodplain landforms and habitats prevailed at DM from 3650–330 cal BP, after which wetlands expanded, suggesting that a flood-based disturbance regime typified the upper delta for most of the late-Holocene. Recently, the upper deltaic plain has been profoundly disturbed by agriculture and other activities, rendering significant loss of habitat. It is believed that a flood-based disturbance regime will recur at MWT if the levees surrounding the tract are intentionally breached as planned for restoration, culminating in a variety of habitats similar to pre-agricultural conditions. Concentrations of Hg, Pb, As, and P pollutants elevated several-fold in surficial sediments are of particular concern, potentially becoming problematic after restoration.

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“…The groups of similar size trees are thought to be trees similar in age, and related to punctuated establishment of red fir in canopy openings made by fire, disease, insect attacks, or windthrow (Hallin, 1957). Disturbances that produce a mineral seedbed are particularly favorable for regeneration of red fir and associated tree species (Gordon, 1970a;Laacke, 1990), and punctuated establishment after fire (Chappell and Agee, 1996) and logging (Gordon, 1970b;Barbour et al, 1998) has been observed. Yet, red fir also regenerates in partial shade in small openings made www.elsevier.com/locate/foreco Forest Ecology and Management 235 (2006) [143][144][145][146][147][148][149][150][151][152][153][154] by tree-falls or death of single or small groups of canopy trees (Ustin et al, 1984;Selter et al, 1986;Taylor and Halpern, 1991).…”

Section: Introductionmentioning

confidence: 99%

Regeneration patterns in old-growth red fir–western white pine forests in the northern Sierra Nevada, Lake Tahoe, USA

Scholl

Taylor

2006

Forest Ecology and Management

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Tree regeneration following clearcut logging in red fir forests of California

Cited by 41 publications

References 9 publications

Influence of soil thickness on stand characteristics in a Sierra Nevada mixed-conifer forest

Influence of soil thickness on stand characteristics in a Sierra Nevada mixed-conifer forest

A palaeoenvironmental reconstruction to aid in the restoration of floodplain and wetland habitat on an upper deltaic plain, California, USA

Regeneration patterns in old-growth red fir–western white pine forests in the northern Sierra Nevada, Lake Tahoe, USA

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