Predicting Potential Impacts of Acid Rain on Elemental Cycling in a Southern Appalachian Deciduous Forest at Coweeta

1980 ◽  
pp. 335-340
Author(s):  
Bruce Haines ◽  
Jack Waide
Keyword(s):  
Acid Rain ◽  
Deciduous Forest ◽  
Southern Appalachian ◽  
Elemental Cycling

scholarly journals Frequency of sprout-origin trees in pre-European settlement forests of the southern Appalachian Mountains

2016 ◽  
Vol 46 (8) ◽  
pp. 1019-1025 ◽  
Author(s):  
Carolyn A. Copenheaver ◽  
Tara L. Keyser
Keyword(s):  
Large Scale ◽  
Tree Mortality ◽  
Deciduous Forest ◽  
Appalachian Mountains ◽  
Acer Rubrum ◽  
Blue Ridge ◽  
Southern Appalachian Mountains ◽  
European Settlement ◽  
Southern Appalachian ◽  
Witness Trees

We hypothesized that tree form, recorded in historical public land surveys, would provide a valuable proxy record of regeneration patterns during early-European settlement of North America’s eastern deciduous forest. To test this hypothesis, we tallied stem form from witness trees used in land survey records in the southern Appalachian Mountains from 13 counties spanning four physiographic provinces: Piedmont, Blue Ridge, Ridge and Valley, and Cumberland Plateau. A total of 3% of witness trees used in the land surveys were of sprout origin. American basswood (Tilia americana L.) exhibited the highest proportion of sprout-origin trees at 12%. Other overstory species with a high proportion of sprout-origin trees were hickory (Carya sp.), red maple (Acer rubrum L.), and sycamore (Platanus occidentalis L.), all with 6% of stems being from sprout origin. Blue Ridge had significantly more sprout-origin trees compared with the other three physiographic provinces. Forests in the southern Appalachian Mountains during the pre-European settlement period had a suite of disturbances that controlled their growth and regeneration; however, most of these disturbances did not result in large-scale tree mortality, and therefore, sprouts were not an important source of regeneration.

Acid rain: Threshold of leaf damage in eight plant species from a Southern Appalachian forest succession

1980 ◽  
Vol 14 (1) ◽  
pp. 403-407 ◽  
Author(s):  
Bruce Haines ◽  
Marcia Stefani ◽  
Floyd Hendrix
Keyword(s):  
Acid Rain ◽  
Plant Species ◽  
Forest Succession ◽  
Leaf Damage ◽  
Southern Appalachian

A long-term study of tree seedling recruitment in southern Appalachian forests: the effects of canopy gaps and shrub understories

2000 ◽  
Vol 30 (10) ◽  
pp. 1617-1631 ◽  
Author(s):  
Brian Beckage ◽  
James S Clark ◽  
Barton D Clinton ◽  
Bruce L Haines
Keyword(s):  
Seedling Recruitment ◽  
Deciduous Forest ◽  
Acer Rubrum ◽  
Canopy Gaps ◽  
Seed Rain ◽  
First Year ◽  
Gap Formation ◽  
Tree Seedling ◽  
Long Term Study ◽  
Southern Appalachian

We examined the importance of intermediate-sized gaps and a dense shrub layer on tree seedling recruitment in a southern Appalachian deciduous forest. We created 12 canopy gaps under two contrasting understory conditions: 6 gaps were dominated by the dense, shade-producing shrub, Rhododendron maximum L., while the remaining gaps were relatively open. Density of first-year and >first-year seedlings was monitored for 5 years in transects extending from adjacent undisturbed forest through the experimental gaps. We concurrently measured the understory light environment, soil moisture, litter biomass, and seed rain. Neither species diversity nor richness consistently increased following gap formation. Acer rubrum L. responded consistently to canopy gaps with increased seedling densities while most other species, including both shade-tolerant and shade-intolerant species, did not. Seedling densities were especially low and unresponsive to gap formation in areas dominated by R. maximum. Understory light levels were consistently low beneath R. maximum and did not increase with canopy gap formation. Our results suggest that dense shrub cover can neutralize recruitment opportunities in canopy gaps, that seed rain often limits recruitment in gaps, and that canopy gaps that are larger or include understory disturbance are needed to maintain diversity in these forests.

Acid Rain meeting in Ottawa

1984 ◽  
Vol 18 (5) ◽  
pp. 157-158 ◽  
Author(s):  
Bette Hileman
Keyword(s):  
Acid Rain
Sign in / Sign up

Export Citation Format

Share Document