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Authors Holmer, M; Kendrick, GA
Author Full Name Holmer, Marianne; Kendrick, Gary A.
Title High Sulfide Intrusion in Five Temperate Seagrasses Growing Under Contrasting Sediment Conditions
Source ESTUARIES AND COASTS
Language English
Document Type Article
Author Keywords delta S-34; Sulfate reduction rates; Sulfide pools; Iron content; Western Australia
Keywords Plus EELGRASS ZOSTERA-MARINA; SULFATE REDUCTION RATES; WESTERN-AUSTRALIA; POSIDONIA-AUSTRALIS; HETEROZOSTERA-TASMANICA; CARBONATE SEDIMENTS; SEASONAL-VARIATION; NUTRIENT DYNAMICS; OXYGEN DYNAMICS; SULFUR
Abstract Five temperate seagrasses (Amphibolis antartica, Halophila ovalis, Posidonia australis, Posidonia sinuosa and Zostera nigricaulis) were surveyed along the south-west coast of Western Australia. These morphological different seagrasses grow in contrasting sediments with large variations in sedimentary organic matter, carbonate and iron contents. We tested if sulfur composition in the plants responded to sulfur dynamics in the sediments and if plant morphology affected the sulfur composition of the plants. The sediments were characterized by low sulfate reduction rates (< 9 mmol m(-2)day(-1)), low concentrations of dissolved sulfides in the pore waters (< 74 mu M) and low burial of sulfides (total reducible sulfur < 0.8 mol m(-2)) in the sediments. However, all seagrasses showed high intrusion in the below-ground parts with up to 84 % of the sulfur derived from sedimentary sulfides. There were no direct links between sulfur in the plants and sulfur dynamics in the sediments, probably due to low iron contents in the sediments limiting the buffering capacity of the sediments and exposing the plants to sulfides despite low rates of production and low pools of sulfides. The intrusion was linked between plant compartments (roots, rhizomes and leaves) for the two small species (H. ovalis and Z. nigricaulis), whereas the intrusion into the leaves was limited for the larger species (P. australis and P. sinuosa) and for A. antarctica, where extensive rhizomes and roots and the long stem for A. antarctica separate the leaves from the sediment compartment. Elevated intrusion was observed at two study locations, where natural deposition of organic matter or nutrient enrichment may be contributing factors to enhanced sulfide pressure.
Author Address [Holmer, Marianne] Univ So Denmark, Inst Biol, DK-5230 Odense M, Denmark; [Kendrick, Gary A.] Univ Western Australia, Sch Plant Biol, Perth, WA 6009, Australia; [Kendrick, Gary A.] Univ Western Australia, UWA Oceans Inst, Perth, WA 6009, Australia
Reprint Address Holmer, M (corresponding author), Univ So Denmark, Inst Biol, Campusvej 55, DK-5230 Odense M, Denmark.
E-mail Address holmer@biology.sdu.dk
ResearcherID Number Holmer, Marianne/M-6989-2014; Kendrick, Gary Andrew/B-3460-2011
ORCID Number Holmer, Marianne/0000-0002-6095-5488; Kendrick, Gary Andrew/0000-0002-0276-6064
Funding Agency and Grant Number UWA; Danish Council for Natural Sciences [09-071369]
Funding Text Thanks to Di Walker for great hospitality hosting MH during her stay at the University of Western Australia (UWA) and in particular for assistance during the field campaign in Albany. Thanks also to Jeff Bastyan, Tom Davis, Renee Hovey, John Statton and staff at Plant Biology at UWA. MH was supported by a Gledden Visiting Research Fellowship from UWA and Danish Council for Natural Sciences (Travel stipend and 09-071369).
Times Cited 23
Total Times Cited Count (WoS, BCI, and CSCD) 23
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 2013
Volume 36
Issue 1
Beginning Page 116
Ending Page 126
Digital Object Identifier (DOI) 10.1007/s12237-012-9550-7
Page Count 11
Web of Science Category Environmental Sciences; Marine & Freshwater Biology
Subject Category Environmental Sciences & Ecology; Marine & Freshwater Biology
Document Delivery Number 059PL
Unique Article Identifier WOS:000312717400009
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