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Publication Type J
Authors Soares, MLG; Tognella, MMP; Cuevas, E; Medina, E
Author Full Name Gomes Soares, M. L.; Pereira Tognella, M. M.; Cuevas, E.; Medina, E.
Title Photosynthetic capacity and intrinsic water-use efficiency of Rhizophora mangle at its southernmost western Atlantic range
Source PHOTOSYNTHETICA
Language English
Document Type Article
Author Keywords intercellular CO2 concentration; leaf temperature; photosynthesis; stable isotope
Keywords Plus GAS-EXCHANGE CHARACTERISTICS; MANGROVE FORESTS; FRACTIONATION; DELTA-N-15; VEGETATION; SALINITY; RACEMOSA; FLORIDA; CARBON; L.
Abstract The southernmost presence of Rhizophora mangle in the western Atlantic coast occurs in coastal wetlands between 27 and 28A degrees S in the State of Santa Catarina, Brazil. We selected mangrove communities at the estuary of the River Tavares, Florianopolis, and the Sonho Beach, Palhosa, for measurement of photosynthetic performance and intrinsic water-use efficiency of R. mangle and coexisting individuals of Avicennia schaueriana and Laguncularia racemosa, during the spring season. We used gas-exchange techniques and isotopic signatures of C and N to estimate instantaneous water-use and carboxylation efficiency (CE), long-term water-use efficiency, and potential N limitation. Results showed that R. mangle had significantly lower photosynthetic rates but similar conductance values as the other two species resulting in lower intrinsic water use (WUEi) and CE. WUEi and CE were positively correlated in L. racemosa and A. schaueriana, but not in R. mangle. At each site, delta C-13 values of A. schaueriana were consistently higher than those for the other species, indicating that these species are subjected to contrasting water stress conditions. Leaf concentrations of C were lower, whilst those of N were always higher in A. schaueriana, indicating accumulation of salts and nonprotein N-compounds in leaves. Nitrogen concentrations and moderate positive delta N-15 values indicated that plant growth at the study sites was not inhibited by nutrient deficiency, and was not influenced by urban residual waters. Lower photosynthetic rates and values of CE of R. mangle compared to the other two species may constitute constraining factors preventing this species from establishing at higher latitudes.
Author Address [Gomes Soares, M. L.] Univ Estado Rio de Janeiro, Fac Oceanog, Nucleo Estudos Manguezais, BR-20550013 Rio De Janeiro, RJ, Brazil; [Pereira Tognella, M. M.] Univ Fed Espirito Santo, Dept Ciencias Agr & Biol, Ctr Univ Norte Espirito Santo, BR-29930000 Sao Mateus, ES, Brazil; [Cuevas, E.] Univ Puerto Rico, Dept Biol, Rio Piedras, PR 00926 USA; [Cuevas, E.] Univ Puerto Rico, Ctr Trop Ecol & Conservat, Rio Piedras, PR 00926 USA; [Medina, E.] Inst Venezolano Invest Cient, Ctr Ecol, Edo Miranda 1204, ZP, Venezuela; [Medina, E.] US Forest Serv, Int Inst Trop Forestry, USDA, San Juan, PR 00926 USA
Reprint Address Medina, E (reprint author), Inst Venezolano Invest Cient, Ctr Ecol, Carretera Panamer,Km 11, Edo Miranda 1204, ZP, Venezuela.
E-mail Address medinage@gmail.com
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Cited Reference Count 39
Times Cited 1
Total Times Cited Count (WoS, BCI, and CSCD) 1
Publisher SPRINGER
Publisher City DORDRECHT
Publisher Address VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
ISSN 0300-3604
29-Character Source Abbreviation PHOTOSYNTHETICA
ISO Source Abbreviation Photosynthetica
Publication Date SEP
Year Published 2015
Volume 53
Issue 3
Beginning Page 464
Ending Page 470
Digital Object Identifier (DOI) 10.1007/s11099-015-0119-0
Page Count 7
Web of Science Category Plant Sciences
Subject Category Plant Sciences
Document Delivery Number CN4OZ
Unique Article Identifier WOS:000358411000017
Plants associated with this reference

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