Isotopic signatures of stem water reveal differences in water sources accessed by mangrove tree species

Lovelock, Catherine E., Reef, Ruth and Ball, Marilyn C. (2017) Isotopic signatures of stem water reveal differences in water sources accessed by mangrove tree species. Hydrobiologia, 1-13. doi:10.1007/s10750-017-3149-8


Author Lovelock, Catherine E.
Reef, Ruth
Ball, Marilyn C.
Title Isotopic signatures of stem water reveal differences in water sources accessed by mangrove tree species
Journal name Hydrobiologia   Check publisher's open access policy
ISSN 1573-5117
0018-8158
Publication date 2017-03-08
Sub-type Article (original research)
DOI 10.1007/s10750-017-3149-8
Open Access Status Not yet assessed
Start page 1
End page 13
Total pages 13
Place of publication Dordrecht, Netherlands
Publisher Springer Netherlands
Collection year 2018
Language eng
Formatted abstract
Mangrove trees are rooted in saline soils which can limit their growth. Access to alternative, less saline water sources may provide important water subsidies. We assessed the hydrogen and oxygen isotopic signatures of soil porewater, groundwater and atmospheric water sources (dew and rainfall) and tree stem water from three mangroves species over two sites that varied in elevation. Although stem water isotopic signatures were most similar to porewater, variation in isotopic values indicated trees also accessed alternative water sources, the degree to which varied over sites and among species. Rhizophora stylosa had lowest values of stable isotopes among the species indicating significant groundwater utilization. In a long-term fertilization experiment we found that growth of Ceriops australis and Lumnitzera racemosa was nitrogen limited, while growth of R. stylosa was nitrogen limited to a lesser extent, suggesting groundwater may also provide nutritional benefits for R. stylosa. The uptake of alternative water sources in addition to saline porewater may improve metabolic function, differentially altering the performance of different species and over sites.
Keyword Ceriops australis
Groundwater
Lumnitzera racemosa
Rhizophora stylosa
δ18O
δ2H
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Biological Sciences Publications
 
Versions
Version Filter Type
Citation counts: Scopus Citation Count Cited 0 times in Scopus Article
Google Scholar Search Google Scholar
Created: Tue, 28 Mar 2017, 00:20:19 EST by Web Cron on behalf of Learning and Research Services (UQ Library)