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Publication Type J
Authors Watson, EB; Andrews, HM; Fischer, A; Cencer, M; Coiro, L; Kelley, S; Wigand, C
Author Full Name Watson, Elizabeth Burke; Andrews, Holly M.; Fischer, Amy; Cencer, Morgan; Coiro, Laura; Kelley, Sean; Wigand, Cathleen
Title Growth and photosynthesis responses of two co-occurring marsh grasses to inundation and varied nutrients
Source BOTANY
Language English
Document Type Article
Author Keywords eutrophication; salinity; marsh loss; New England; sea level rise
Keywords Plus SEA-LEVEL RISE; ENGLAND SALT-MARSH; ARBUSCULAR MYCORRHIZAL FUNGI; SPARTINA-PATENS; PLANT ZONATION; CAPE-COD; AERENCHYMA FORMATION; METABOLIC-RESPONSES; VEGETATION CHANGE; COASTAL MARSHES
Abstract For tidal marshes of the US Northeast, the late twentieth century decline of Spartina patens (Aiton) Muhl. has been attributed to increased flooding associated with accelerated sea level rise and nitrogen over-enrichment from cultural eutrophication. The objective of this study was to examine the impacts of inundation and nutrient availability on growth, photosynthesis, and interactions of S. patens and Distichlis spicata (L.) Greene, which co-occur and are common marsh species. Plants were grown in a factorial greenhouse experiment, where flow-through seawater was used to simulate semidiurnal tides. Field surveys were additionally conducted to relate plant distributions to environmental conditions. For S. patens grown in monoculture, nutrient additions did not enhance growth for the high inundation treatment. In addition, the combination of high nutrient availability and high inundation adversely affected S. patens tiller density, photosynthetic efficiency, and leaf CO2 uptake. For D. spicata, nutrient additions enhanced growth for both inundation treatments with respect to aboveground biomass and tiller density. For species pairings, S. patens expanded relative to D. spicata under low inundation, low nutrient availability conditions, but declined relative to D. spicata under daily inundation in combination with nutrient amendments. These findings were additionally supported by field data, which indicated that D. spicata was more common than S. patens where nutrient availability was high. These results suggest that S. patens persistence is favored by low nutrient inputs and well-drained conditions, and supports the interpretation that this species is vulnerable to loss where high nutrient loads coincide with accelerated sea level rise.
Author Address [Watson, Elizabeth Burke; Coiro, Laura; Kelley, Sean; Wigand, Cathleen] US EPA, Atlantic Ecol Div, Off Res & Dev, Natl Hlth & Environm Effects Res Lab, Narragansett, RI USA; [Andrews, Holly M.] Univ Michigan, Dept Ecol & Evolutionary Biol, Ann Arbor, MI 48109 USA; [Fischer, Amy] Arkansas State Univ, Jonesboro, AR USA; [Cencer, Morgan] Michigan Technol Univ, Dept Chem, Houghton, MI 49931 USA; [Kelley, Sean] Univ Rhode Isl, Dept Nat Resources Sci, Kingston, RI 02881 USA
Reprint Address Watson, EB (reprint author), Drexel Univ, Acad Nat Sci, Earth & Environm Sci Dept, Biodivers, Philadelphia, PA 19104 USA.
E-mail Address elizabeth.b.watson@gmail.com
ORCID Number Watson, Elizabeth/0000-0002-8496-1647
Funding Agency and Grant Number US Environmental Protection Agency
Funding Text We acknowledge K. Kelly for maintaining the flow-through seawater system, R. Ahlgren for arranging the reverse osmosis system, and the US Fish and Wildlife Service, the Barrington Land Trust, the City of Warwick, and the Nature Conservancy for access to field sites. The Narragansett Bay National Estuarine Research Reserve provided access to the field sites on Prudence Island, loans of field equipment, and logistical and technical support, and we would like to specifically recognize K. Raposa, D. Durant, and R. Weber for their contributions. A. Hanson, R. Johnson, A. Oczkowski, C. Esch, M. Chintala, J. Bishop, and N. Angelo provided field and laboratory assistance. R. McKinney, G. Thursby, and R. Johnson provided helpful input on an earlier version of this manuscript. This report is tracking number ORD-003241 of the US EPA's Office of Research and Development, National Health and Environmental Effects Research Laboratory, Atlantic Ecology Division. Although the information in this document has been funded by the US Environmental Protection Agency, it does not necessarily reflect the views of the Agency and no official endorsement should be inferred. Mention of trade names or commercial products does not constitute endorsement or recommendation for use.
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Cited Reference Count 74
Times Cited 4
Total Times Cited Count (WoS, BCI, and CSCD) 4
Publisher CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
Publisher City OTTAWA
Publisher Address 65 AURIGA DR, SUITE 203, OTTAWA, ON K2E 7W6, CANADA
ISSN 1916-2790
29-Character Source Abbreviation BOTANY
ISO Source Abbreviation Botany
Publication Date OCT
Year Published 2015
Volume 93
Issue 10
Beginning Page 671
Ending Page 683
Digital Object Identifier (DOI) 10.1139/cjb-2015-0055
Subject Category 13
Document Delivery Number Plant Sciences
Unique Article Identifier Plant Sciences
Plants associated with this reference

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