Nitrogen sharing and water source partitioning co-occur in estuarine wetlands

Wei, Lili, Lockington, David A., Yu, Shen and Lovelock, Catherine E. (2015) Nitrogen sharing and water source partitioning co-occur in estuarine wetlands. Functional Plant Biology, 42 4: 410-417. doi:10.1071/FP14141

Author Wei, Lili
Lockington, David A.
Yu, Shen
Lovelock, Catherine E.
Title Nitrogen sharing and water source partitioning co-occur in estuarine wetlands
Journal name Functional Plant Biology   Check publisher's open access policy
ISSN 1445-4416
Publication date 2015-02-12
Year available 2015
Sub-type Article (original research)
DOI 10.1071/FP14141
Open Access Status
Volume 42
Issue 4
Start page 410
End page 417
Total pages 8
Place of publication Clayton, VIC Australia
Publisher CSIRO Publishing
Language eng
Formatted abstract
Plant–plant interactions are particularly complex in multi-resource limited environments. The aim of this study was to assess species interactions in estuarine wetlands where both N and fresh water are limited. We combined stable isotope methods and dissimilarity analyses to compare interspecific interactions in N source use and water source use. Both Melaleuca quinquenervia (Cav.) S. T Blake and Avicennia marina (Forssk.) Vierh. had a lower leaf δ15N when they were growing together with the N-fixer Casuarina glauca Sieb. ex Spreng. compared with those trees growing in monospecific stands, but their water isotopes, δ18O and δD, were different from C. glauca. Our results indicate that the N-fixer C. glauca shared their N with co-existing neighbours, either indirectly or directly, but that water sources were partitioned among them. Further analyses showed that M. quinquenervia and C. glauca had lower dissimilarity in N source use but higher dissimilarity in water source use than the C. glaucaA. marina pair, implying that the co-existence between M. quinquenervia and C. glauca is relatively stable. Our results suggest that facilitative interaction and resource partitioning can co-occur in estuarine wetlands, and which could be important in maintaining diversity across resource gradients.
Keyword Actinorhizal plant
Paper-bark tea tree
Resource partitioning
Resource sharing
Swamp oak
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID DP1096749
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
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School of Biological Sciences Publications
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