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Authors Suykerbuyk, W; Govers, LL; van Oven, WG; Giesen, K; Giesen, WBJT; de Jong, DJ; Bouma, TJ; van Katwijk, MM
Author Full Name Suykerbuyk, Wouter; Govers, Laura L.; van Oven, W. G.; Giesen, Kris; Giesen, Wim B. J. T.; de Jong, Dick J.; Bouma, Tjeerd J.; van Katwijk, Marieke M.
Title Living in the intertidal: desiccation and shading reduce seagrass growth, but high salinity or population of origin have no additional effect
Source PEERJ
Language English
Document Type Article
Author Keywords Stress; Desiccation; Light; Salinity; Zostera noltii; Intertidal seagrass; Population of origin; Morphotypic variation; Ecotypic variation; Donor
Abstract The limiting effects of stressors like desiccation, light and salinity on seagrass growth and distribution are well-studied. However, little is known about their interactive effects, and whether such effects might differ among populations that are adapted to different local conditions. In two laboratory experiments we tested (a) if growth and development of intertidal, temperate Zostera noltii is affected by emergence time (experiment 1 and 2), and (b) how this is affected by an additional, second stressor, namely shading (experiment 1) or high salinity (25, 30 and 35, experiment 2). In addition, we tested (c) whether the effects of emergence time and salinity varied between three different European seagrass populations (Saint-Jacut/France, Oosterschelde/The Netherlands, and Sylt/Germany), which are likely adapted to different salinity levels (experiment 2). In both experiments, emergence of 8 h per tidal cycle (of 12 h) had a negative effect on seagrass relative growth rate (RGR), and aboveground biomass. Emergence furthermore reduced either rhizome length (experiment 1) or belowground biomass (experiment 2). Shading (experiment 1) resulted in lower RGR and a two-fold higher aboveground/belowground ratio. We found no interactive effects of emergence and shading stress. Salinity (experiment 2) did not affect seagrass growth or morphology of any of the three populations. The three tested populations differed greatly in morphology but showed no differential response to emergence or salinity level (experiment 2). Our results indicate that emergence time and shading show an additive negative effect (no synergistic or antagonistic effect), making the plants still vulnerable to such combination, a combination that may occur as a consequence of self-shading during emergence or resulting from algal cover. Emergence time likely determines the upper limit of Z. noltii and such shading will likely lower the upper limit. Shading resulted in higher aboveground/belowground ratios as is a general response in seagrass. Z. noltii of different populations originating from salinity 30 and 35 seem tolerant to variations in salinity within the tested range. Our results indicate that the three tested populations show morphotypic rather than ecotypic variation, at least regarding the salinity and emergence, as there were no interactive effects with origin. For restoration, this implies that the salinity regime of the donor and receptor site of Z. noltii is of no concern within the salinity range 25-35.
Author Address [Suykerbuyk, Wouter; van Oven, W. G.; Giesen, Kris; Bouma, Tjeerd J.; van Katwijk, Marieke M.] Dept Estuarine & Delta Syst, Yerseke, Netherlands; [Suykerbuyk, Wouter; van Oven, W. G.; Giesen, Kris; Bouma, Tjeerd J.; van Katwijk, Marieke M.] Univ Utrecht, Royal Netherlands Inst Sea Res NIOZ, Yerseke, Netherlands; [Suykerbuyk, Wouter; Govers, Laura L.; Giesen, Kris; van Katwijk, Marieke M.] Radboud Univ Nijmegen, Inst Water & Wetland Res, Dept Environm Sci, Nijmegen, Netherlands; [Govers, Laura L.] Univ Groningen, Inst Evolutionary Life Sci GELIFES, Conservat Ecol Grp, Groningen, Netherlands; [Govers, Laura L.] Radboud Univ Nijmegen, Inst Water & Wetland Res, Dept Aquat Ecol & Environm Biol, Nijmegen, Netherlands; [Giesen, Wim B. J. T.] Euroconsult Mott MacDonald, Arnhem, Netherlands; [de Jong, Dick J.] Rijkswaterstaat, Minist Infrastruct & Environm, Zee & Delta Dept, Middelburg, Netherlands
Reprint Address van Katwijk, MM (corresponding author), Dept Estuarine & Delta Syst, Yerseke, Netherlands.; van Katwijk, MM (corresponding author), Univ Utrecht, Royal Netherlands Inst Sea Res NIOZ, Yerseke, Netherlands.; van Katwijk, MM (corresponding author), Radboud Univ Nijmegen, Inst Water & Wetland Res, Dept Environm Sci, Nijmegen, Netherlands.
E-mail Address m.vankatwijk@science.ru.nl
ResearcherID Number van Katwijk, Marieke M/B-1709-2012
ORCID Number van Katwijk, Marieke M/0000-0002-4482-5835; Bouma, Tjeerd/0000-0001-7824-7546
Funding Agency and Grant Number Projectbureau Zeeweringen, Middelburg, the Netherlands
Funding Text This work was supported by Projectbureau Zeeweringen, Middelburg, the Netherlands. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Times Cited 4
Total Times Cited Count (WoS, BCI, and CSCD) 4
Publisher PEERJ INC
Publisher City LONDON
Publisher Address 341-345 OLD ST, THIRD FLR, LONDON, EC1V 9LL, ENGLAND
ISSN 2167-8359
29-Character Source Abbreviation PEERJ
ISO Source Abbreviation PeerJ
Publication Date JUL 20
Year Published 2018
Volume 6
Article Number e5234
Digital Object Identifier (DOI) 10.7717/peerj.5234
Page Count 21
Web of Science Category Multidisciplinary Sciences
Subject Category Science & Technology - Other Topics
Document Delivery Number GO0TF
Unique Article Identifier WOS:000439652200003
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