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Full-Text Articles in Life Sciences

Aboveground Production And Nutrient Circulation Along A Flooding Gradient In A South Carolina Coastal Plain Forest, William Conner, Marianne K. Burke, B Graeme Lockaby Jan 1999

Aboveground Production And Nutrient Circulation Along A Flooding Gradient In A South Carolina Coastal Plain Forest, William Conner, Marianne K. Burke, B Graeme Lockaby

Publications

Relative to effects of flooding, little is known about the influence of hydrology-nutrient interactions on aboveground net primary production (NPP) in forested wetlands. The authors found that nutrient circulation and NPP were closely related along a complex physical, chemical, and hydrologic gradient in a bottomland hardwood forest with four distinct communities. Aboveground biomass, NPP, biomass partitioning to stem production, growth efficiency, and soil macronutrient availability were greatest in the flooded zone, possibly because of the stable hydrologic regime. In the wet transition zone, trees were least productive, nutrient use efficiency was highest, and N retranslocation from foliage before abscission was …


Tree Seedling Establishment Across A Hydrologic Gradient In A Bottomland And Restoration, William Conner, R K. Kolka, C C. Trettin, E A. Nelson May 1998

Tree Seedling Establishment Across A Hydrologic Gradient In A Bottomland And Restoration, William Conner, R K. Kolka, C C. Trettin, E A. Nelson

Publications

Seedling establishment and survival on the Savannah River Site in South Carolina is being monitored as part of the Pen Branch Bottomland Restoration Project. Bottomland tree species were planted from 1993-1995 across a hydrologic gradient which encompasses the drier upper floodplain corridor, the lower floodplain corridor and the continuously inundated delta. Twelve species were planted in the three areas based on their flood tolerance and the hydrology of the area. Planted areas are separated by unplanted control strips to assess natural regeneration. A seedling survey conducted in 1997 showed that planted areas had significantly greater seedling densities than unplanted control …


Southern Deepwater Swamps, William Conner, Marilyn A. Buford Jan 1998

Southern Deepwater Swamps, William Conner, Marilyn A. Buford

Publications

No abstract provided.


Aboveground Production In Southeastern Floodplain Forests: A Test Of The Subsidy-Stress Hypothesis, William Conner, J Patrick Megonigal, Steven Kroeger, Rebecca R. Sharitz Mar 1997

Aboveground Production In Southeastern Floodplain Forests: A Test Of The Subsidy-Stress Hypothesis, William Conner, J Patrick Megonigal, Steven Kroeger, Rebecca R. Sharitz

Publications

It has been hypothesized that periodically flooded forests have higher rates of aboveground net primary production than upland forests and near-continuously flooded forests, but a competing hypothesis holds that the benefits of periodic inputs of nutrients and water may be diminished by stresses associated with anaerobic soils or drought. To test these hypotheses, we measured groundwater table depths and aboveground productivity in floodplain forests of South Carolina and Louisiana. We established paired plots on locally dry, intermediate, and wet topographic positions across three hydrologic transects in each state. These plots encompassed upland hardwood, bottomland hardwood, and cypress swamp forests. Measurements …


The Problem Of Planting Louisiana Swamplands When Nutria (Myocastor Coypu) Are Present, William Conner, J R. Toliver Oct 1987

The Problem Of Planting Louisiana Swamplands When Nutria (Myocastor Coypu) Are Present, William Conner, J R. Toliver

Publications

Logging of baldcypress (Taxodium distichum) in the swamps of the southeastern United States is once again becoming common and an area of particular concern in Louisiana is the regeneration of cypress in its natural environment. One way to ensure the proper stocking of cypress is to plant seedlings, but nutria usually damage or destroy newly planted seedlings and are a deterrent to cypress regeneration in flooded areas. In 1985 cypress seedlings were planted in a flooded logged area and in an area where flooding was preventing the establishment of natural seedlings. Nutria destroyed 86% of the seedlings in …


Vexar Seedling Protectors Did Not Reduce Nutria Damage To Planted Baldcypress Seedlings, William Conner, John R. Toliver Jan 1987

Vexar Seedling Protectors Did Not Reduce Nutria Damage To Planted Baldcypress Seedlings, William Conner, John R. Toliver

Publications

Vexar seedling protectors were tested for preventing nutria damage to baldcypress (Taxodium distichum (L.) Rich) seedlings planted in Louisiana
swamp forests. Five areas were planted with 1-year-old baldcypress seedlings. Half the seedlings in each area were protected with Vexar seedling protectors. The protectors slowed down the rate of destruction in some areas, but after 3 months, 85% of the guarded seedlings and 87% of the unguarded seedlings were destroyed.


The Ecology Of Barataria Basin, Louisiana: An Estuarine Profile, William Conner, John W. Day Jan 1987

The Ecology Of Barataria Basin, Louisiana: An Estuarine Profile, William Conner, John W. Day

Publications

No abstract provided.