Loading content, please wait..
loading..
Logo
Version 3.22
or
Authors Hoppe-Speer, SCL; Adams, JB; Rajkaran, A; Bailey, D
Author Full Name Hoppe-Speer, Sabine C. L.; Adams, Janine B.; Rajkaran, Anusha; Bailey, Dylan
Title The response of the red mangrove Rhizophora mucronata Lam. to salinity and inundation in South Africa
Source AQUATIC BOTANY
Language English
Document Type Article
Author Keywords Rhizophora mucronata; Seedling growth; Salinity; Water level fluctuations
Keywords Plus AVICENNIA-GERMINANS; WATER RELATIONS; GROWTH; MANGLE; PHYSIOLOGY; SEEDLINGS; FOREST
Abstract Salinity and water level fluctuations are important factors that influence mangrove species distribution, zonation patterns and succession. Increases in salinity and prolonged inundation are predicted along the south eastern African coast associated with sea level rise due to climate change. This study investigated the response of red mangrove seedlings (Rhizophora mucronata Lam.) to these factors in controlled laboratory experiments. Seedlings were exposed to five salinity treatments (0, 8, 18,35 and 45 PSU) and a semi-diurnal tidal cycle in an experimental tank set-up. In a separate experiment the effects of different inundation treatments: no inundation, 3, 6, 9 h tidal cycles and continuous inundation (24 h) were investigated. Both morphological and physiological responses of R. mucronata seedlings were measured. There was a decrease in growth (plant height, biomass and leaf production) with increasing salinity. Seedlings in the seawater, hypersaline and no inundation treatments showed symptoms of stress such as increased leaf necrosis ('burn marks'). The highest seedling growth occurred in the low salinity (8 PSU) treatment, but the highest photosynthetic performance and stomatal conductance occurred in the freshwater treatment (0 PSU). The typical response of stem elongation with increasing inundation was observed in the 24h inundation treatment. Seedlings in the no inundation treatment had significantly lower seedling height compared to the other treatments. (c) 2011 Elsevier B.V. All rights reserved.
Author Address [Hoppe-Speer, Sabine C. L.; Adams, Janine B.; Rajkaran, Anusha] Nelson Mandela Metropolitan Univ, Dept Bot, ZA-6031 Port Elizabeth, South Africa; [Bailey, Dylan] Bayworld Museum & Oceanarium Port Elizabeth, ZA-6001 Port Elizabeth, South Africa
Reprint Address Hoppe-Speer, SCL (corresponding author), Nelson Mandela Metropolitan Univ, Dept Bot, POB 77000, ZA-6031 Port Elizabeth, South Africa.
E-mail Address s204032261@live.nmmu.ac.za
ResearcherID Number Adams, Janine Barbara/AAA-9865-2021
ORCID Number Adams, Janine Barbara/0000-0001-7204-123X
Funding Agency and Grant Number National Research Foundation (NRF); Marine and Coastal Management; Nelson Mandela Metropolitan University
Funding Text The National Research Foundation (NRF) and Marine and Coastal Management through the Joint Venture agreement are thanked for funding this provincial Marine Living Resource Fund project. NRF and Nelson Mandela Metropolitan University provided bursary funding.
Times Cited 42
Total Times Cited Count (WoS, BCI, and CSCD) 43
Publisher ELSEVIER
Publisher City AMSTERDAM
Publisher Address RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
ISSN 0304-3770
29-Character Source Abbreviation AQUAT BOT
ISO Source Abbreviation Aquat. Bot.
Publication Date AUG
Year Published 2011
Volume 95
Issue 2
Beginning Page 71
Ending Page 76
Digital Object Identifier (DOI) 10.1016/j.aquabot.2011.03.006
Page Count 6
Web of Science Category Plant Sciences; Marine & Freshwater Biology
Subject Category Plant Sciences; Marine & Freshwater Biology
Document Delivery Number 802AC
Unique Article Identifier WOS:000293480700001
Plants associated with this reference

LEGAL NOTICES — This website is protected by Copyright © The University of Sussex, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021. The eHALOPH database is protected by Database Right and Copyright © The University of Sussex and other contributors, 2006, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021. This database is based on an earlier work by James Aronson.
THIS WEBSITE AND THIS DATABASE ARE PROVIDED ON AN "AS IS" BASIS, AND YOU USE THEM AND RELY ON THEM AT YOUR OWN RISK.

Contact email: halophytes@sussex.ac.uk
Credits – Tim Flowers, Joaquim Santos, Moritz Jahns, Brian Warburton, Peter Reed