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Publication Type J
Authors Howard, RJ
Author Full Name Howard, Rebecca J.
Title Intraspecific Variation in Growth of Marsh Macrophytes in Response to Salinity and Soil Type: Implications for Wetland Restoration
Source ESTUARIES AND COASTS
Language English
Document Type Article
Author Keywords Brackish marsh; Genetic diversity; Marsh restoration; Salt marsh; Salinity tolerance; Soil type
Keywords Plus SPARTINA-ALTERNIFLORA POACEAE; GRASS DISTICHLIS-SPICATA; GULF-OF-MEXICO; SALT-MARSH; GENETIC DIVERSITY; PHRAGMITES-AUSTRALIS; POPULATION VARIATION; PANICUM-HEMITOMON; COASTAL LOUISIANA; NATURAL WETLANDS
Abstract Genetic diversity within plant populations can influence plant community structure along environmental gradients. In wetland habitats, salinity and soil type are factors that can vary along gradients and therefore affect plant growth. To test for intraspecific growth variation in response to these factors, a greenhouse study was conducted using common plants that occur in northern Gulf of Mexico brackish and salt marshes. Individual plants of Distichlis spicata, Phragmites australis, Schoenoplectus californicus, and Schoenoplectus robustus were collected from several locations along the coast in Louisiana, USA. Plant identity, based on collection location, was used as a measure of intraspecific variability. Prepared soil mixtures were organic, silt, or clay, and salinity treatments were 0 or 18 psu. Significant intraspecific variation in stem number, total stem height, or biomass was found in all species. Within species, response to soil type varied, but increased salinity significantly decreased growth in all individuals. Findings indicate that inclusion of multiple genets within species is an important consideration for marsh restoration projects that include vegetation plantings. This strategy will facilitate establishment of plant communities that have the flexibility to adapt to changing environmental conditions and, therefore, are capable of persisting over time.
Author Address US Geol Survey, Natl Wetlands Res Ctr, Lafayette, LA 70506 USA
Reprint Address Howard, RJ (reprint author), US Geol Survey, Natl Wetlands Res Ctr, Lafayette, LA 70506 USA.
E-mail Address howardr@usgs.gov
Funding Agency and Grant Number Louisiana Department of Natural Resources [2503-9836]
Funding Text Funding for this research was provided by the Louisiana Department of Natural Resources, Agreement No. 2503-9836. Field and greenhouse assistance provided by Tim Daigle, Jennifer Kemmerer, and Russell Walters is appreciated. Darren Johnson assisted with data analyses, and Janelda Biagas prepared figures. Comments from Ken Krauss, Karen McKee, Stephen Faulkner, and two anonymous reviewers helped to improve this manuscript. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the US Government.
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Cited Reference Count 70
Times Cited 6
Total Times Cited Count (WoS, BCI, and CSCD) 9
Publisher SPRINGER
Publisher City NEW YORK
Publisher Address 233 SPRING ST, NEW YORK, NY 10013 USA
ISSN 1559-2723
29-Character Source Abbreviation ESTUAR COAST
ISO Source Abbreviation Estuaries Coasts
Publication Date JAN
Year Published 2010
Volume 33
Issue 1
Beginning Page 127
Ending Page 138
Digital Object Identifier (DOI) 10.1007/s12237-009-9227-z
Subject Category 12
Document Delivery Number Environmental Sciences; Marine & Freshwater Biology
Unique Article Identifier Environmental Sciences & Ecology; Marine & Freshwater Biology
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