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Publication Type J
Authors Howard, RJ; Biagas, J; Allain, L
Author Full Name Howard, Rebecca J.; Biagas, Janelda; Allain, Larry
Title Growth of Common Brackish Marsh Macrophytes Under Altered Hydrologic and Salinity Regimes
Source WETLANDS
Language English
Document Type Article
Author Keywords Brackish marsh; Climate change; Environmental stressors; Hydrology; Plant growth; Salinity
Keywords Plus SEA-LEVEL RISE; JUNCUS-ROEMERIANUS SCHEELE; GULF-OF-MEXICO; SALT-MARSH; CLIMATE-CHANGE; SPARTINA-ALTERNIFLORA; VEGETATION CHANGE; COASTAL WETLANDS; EVERGLADES MARSHES; PLANT ZONATION
Abstract Coastal marsh plants are increasingly subject to physicochemical stressors under rising sea levels, and the maintenance of marsh ecological functions can depend on the ability of individual species and communities to tolerate or adapt to altered conditions. We conducted a greenhouse experiment to identify hydrology and salinity effects on growth of three common brackish marsh macrophytes of coastal Florida, USA: Distichlis spicata, Juncus roemerianus, and Spartina bakeri. The species were potted as monocultures and exposed to three salinities (0, 15, or 28 psu) and two hydrologic conditions (saturated, tidal) over 22 months. Final stem density of J. roemerianus and S. bakeri did not differ among treatments. In D. spicata, however, stem density was lowest at 28 psu and lower in tidal compared to saturated conditions. Mean stem height of all species was lowest at 28 psu. Aboveground biomass of J. roemerianus was not affected by the treatments, but in D. spicata and S. bakeri it was lowest at 28 psu. Results indicated that J. roemerianus was the most adaptable species and may, therefore, be more resilient to climate-change driven stressors. However, plant-plant interactions such as interspecific competition and facilitation can alter the response of individual species to environmental factors.
Author Address [Howard, Rebecca J.; Biagas, Janelda; Allain, Larry] 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 U.S. Fish and Wildlife Service [401818 N511]
Funding Text Funding for this study was provided by the U.S. Fish and Wildlife Service through Intra-Agency Agreement 401818 N511. We appreciate the assistance of Nicole Cormier, Andrew From, Sergio Merino, and Thomas Michot during data collection, and Darren Johnson for conducting statistical analyses. Constructive comments from Camille Stagg and two anonymous reviewers helped improve this manuscript. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
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Cited Reference Count 53
Times Cited 3
Total Times Cited Count (WoS, BCI, and CSCD) 4
Publisher SPRINGER
Publisher City DORDRECHT
Publisher Address VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
ISSN 0277-5212
29-Character Source Abbreviation WETLANDS
ISO Source Abbreviation Wetlands
Publication Date FEB
Year Published 2016
Volume 36
Issue 1
Beginning Page 11
Ending Page 20
Digital Object Identifier (DOI) 10.1007/s13157-015-0711-x
Subject Category 10
Document Delivery Number Ecology; Environmental Sciences
Unique Article Identifier Environmental Sciences & Ecology
Plants associated with this reference

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