HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via ISI Web of Science (5) Citing Articles via Google Scholar Google Scholar Articles by Bruland, G. L. Articles by Richardson, C. J. Search for Related Content PubMed Articles by Bruland, G. L. Articles by Richardson, C. J. GeoRef GeoRef Citation Agricola Articles by Bruland, G. L. Articles by Richardson, C. J. Related Collections Wetland Soils Wetlands and Aquatic Processes Ecosystem Restoration

Division S-10—Wetland Soils

Hydrologic Gradients and Topsoil Additions Affect Soil Properties of Virginia Created Wetlands

^a Soil and Water Science Dep., Univ. of Florida, Institute of Food and Agricultural Sciences, 2169 McCarty Hall, P.O. Box 110290, Gainesville, FL 32611-0290
^b Duke Univ. Wetland Center, Nicholas School of the Environment and Earth Sciences, Box 90333, Durham, NC 27708-0333

^* Corresponding author (GBruland{at}ifas.ufl.edu)

As the role of soil properties in the development of created wetlands (CWs) has not received adequate attention in regulatory or scientific communities, this study was conducted to evaluate the development of soil properties in 11 CWs in Virginia ranging from 4 to 16 yr since creation. Six of the 11 sites received at least 15 cm of topsoil (TS) while the other five sites received no topsoil (No TS). Cores collected from wet, intermediate, and dry positions at each site were analyzed for moisture, bulk density (D_b), soil organic matter (SOM), texture, water-holding capacity (WHC), P sorption index (PSI), and microbial biomass C (MBC). Both positions along the hydrologic gradient and topsoil status were hypothesized to be significant factors in explaining the variability of the measured soil properties. Soil moisture decreased significantly while D_b increased significantly from wet to dry zones. Moisture, WHC, and PSI were all significantly elevated in certain zones of TS compared with No TS sites. Soil organic matter had significant Spearman correlations with all other measured soil properties, revealing that this parameter was an important indictor of soil quality. In addition, sites with high mean moisture, SOM, and PSI values all received TS; conversely, the site with the lowest mean moisture and SOM content did not receive TS. Thus, amending CW soils with TS appeared to be an effective strategy for increasing soil moisture, WHC, and PSI. Whenever possible, practices such as TS or organic amendments should be employed, especially if wetland creation involves excavation into subsoils with low SOM and high D_b.

Abbreviations: CWs, created wetlands • CV, coefficient of variation • D_b, bulk density • GLM, generalized linear model • MBC, microbial biomass carbon • No TS, did not receive topsoil • PSI, phosphorus sorption index • SOM, soil organic matter • TS, received topsoil • VDOT, Virginia Department of Transportation • WHC, water-holding capacity