Results 111 to 120 of about 189 (130)
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Forest Ecology and Management, 1997
Abstract Regeneration under tropical plantations has been suggested as a route to facilitate the restoration of natural forests on degraded deforested lands in the tropics. We tested the hypothesis that 7-year-old tree plantations would have greater abundance and species richness of woody colonizers compared to abandoned pastures, but that the ...
Jennifer Sarah Powers +2 more
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Abstract Regeneration under tropical plantations has been suggested as a route to facilitate the restoration of natural forests on degraded deforested lands in the tropics. We tested the hypothesis that 7-year-old tree plantations would have greater abundance and species richness of woody colonizers compared to abandoned pastures, but that the ...
Jennifer Sarah Powers +2 more
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Carabid assemblages track soil and litter chemical gradients associated with overstory composition
Environmental filtering along resource gradients is a central mechanism shaping local species assemblages, yet how soil and litter chemistry mediates this process for epigeic arthropod communities remains incompletely understood. We investigated how variation in soil and leaf litter chemistry structures carabid assemblages in a temperate arboretum ...Slavomír Stašiov +6 more
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The American Midland Naturalist, 1998
Abstract In 1957, the exotic balsam woolly adelgid (Adelges piceae Ratz.) was discovered in the southern Appalachians. It quickly spread throughout the spruce-fir forests, decimating adult Fraser fir (Abies fraseri (Pursh) Poir.) populations. In 1990 and 1991, a system of temporary and permanent plots was established on five mountains in the Great ...
George F. Smith, N. S. Nicholas
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Abstract In 1957, the exotic balsam woolly adelgid (Adelges piceae Ratz.) was discovered in the southern Appalachians. It quickly spread throughout the spruce-fir forests, decimating adult Fraser fir (Abies fraseri (Pursh) Poir.) populations. In 1990 and 1991, a system of temporary and permanent plots was established on five mountains in the Great ...
George F. Smith, N. S. Nicholas
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Canadian Journal of Forest Research, 2008
Stand structure diversity is hypothesized (i) to increase with stand development and (ii) to be greater in mixedwood stands than in conifer and broadleaf stands. We examined the effects of time since stand-replacing fire (TSF) and overstory type on stand volume, stand density, and tree-size variability, which is measured using Shannon’s diversity index
Brian W. Brassard +3 more
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Stand structure diversity is hypothesized (i) to increase with stand development and (ii) to be greater in mixedwood stands than in conifer and broadleaf stands. We examined the effects of time since stand-replacing fire (TSF) and overstory type on stand volume, stand density, and tree-size variability, which is measured using Shannon’s diversity index
Brian W. Brassard +3 more
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Forest Pathology, 2000
SummaryArmillaria root disease is a contributing factor to oak decline in the Ozark Mountains of central USA. We have identified Armillaria gallica, Armillaria mellea, and Armillaria tabescens in Quercus‐Carya‐Pinus forests of the region. Presence/absence patterns of each Armillaria species as well as all possible Armillaria species combinations were ...
J. N. Bruhn +4 more
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SummaryArmillaria root disease is a contributing factor to oak decline in the Ozark Mountains of central USA. We have identified Armillaria gallica, Armillaria mellea, and Armillaria tabescens in Quercus‐Carya‐Pinus forests of the region. Presence/absence patterns of each Armillaria species as well as all possible Armillaria species combinations were ...
J. N. Bruhn +4 more
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Castanea, 2004
Abstract We described overstory tree age and composition among hemlock stands that varied in physiographic structure at Delaware Water Gap National Recreation Area located in northeastern Pennsylvania and northwestern New Jersey. Hemlock stands were comprised primarily of eastern hemlock (Tsuga canadensis), chestnut oak (Quercus prinus), black birch ...
Carolyn Mahan +4 more
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Abstract We described overstory tree age and composition among hemlock stands that varied in physiographic structure at Delaware Water Gap National Recreation Area located in northeastern Pennsylvania and northwestern New Jersey. Hemlock stands were comprised primarily of eastern hemlock (Tsuga canadensis), chestnut oak (Quercus prinus), black birch ...
Carolyn Mahan +4 more
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Forest Ecology and Management, 2014
The desirable structure of longleaf pine forests, which generally includes a relatively open canopy of pines, very few woody stems in the mid-story, and a well-developed, herbaceous ground layer, provides critical habitat for flora and fauna and contributes to ecosystem function.
Benjamin O. Knapp +4 more
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The desirable structure of longleaf pine forests, which generally includes a relatively open canopy of pines, very few woody stems in the mid-story, and a well-developed, herbaceous ground layer, provides critical habitat for flora and fauna and contributes to ecosystem function.
Benjamin O. Knapp +4 more
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Canadian Journal of Forest Research, 2008
Bark beetle caused mortality continues to play a critical role in determining the composition and structure of forests in North America, and revegetation dynamics following these disturbances are poorly understood. We assessed forest composition following southern pine beetle, Dendroctonus frontalis Zimmermann, mortality and associated cut and leave ...
T. W. Coleman +3 more
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Bark beetle caused mortality continues to play a critical role in determining the composition and structure of forests in North America, and revegetation dynamics following these disturbances are poorly understood. We assessed forest composition following southern pine beetle, Dendroctonus frontalis Zimmermann, mortality and associated cut and leave ...
T. W. Coleman +3 more
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Southeastern Naturalist, 2016
Abstract This study provides a preliminary assessment of 4 compartments on the Crossett Experimental Forest (CEF) being restored to old-growth-like conditions. After being partially cleared for agriculture or lumbered in the late 1910s, Compartments 1, 2, 11, and 12 were included in a combination of pulpwood-thinning and uneven-aged cutting-cycle ...
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Abstract This study provides a preliminary assessment of 4 compartments on the Crossett Experimental Forest (CEF) being restored to old-growth-like conditions. After being partially cleared for agriculture or lumbered in the late 1910s, Compartments 1, 2, 11, and 12 were included in a combination of pulpwood-thinning and uneven-aged cutting-cycle ...
openaire +1 more source