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Publication Type J
Authors Larcher, L; Boeger, MRT; Sternberg, LDLO
Author Full Name Larcher, Leticia; Boeger, Maria Regina Torres; Sternberg, Leonel da Silveira Lobo O'Reilly
Title Gas exchange and isotopic signature of mangrove species in Southern Brazil
Source AQUATIC BOTANY
Language English
Document Type Article
Author Keywords Photosynthetic rates; Stable isotopes; Salinity tolerance; Water use efficiency
Keywords Plus RHIZOPHORA-MANGLE L.; WATER-USE EFFICIENCY; FOREST STRUCTURE; SALINITY; PHOTOSYNTHESIS; SCRUB; ECOSYSTEMS; FLORIDA; FRACTIONATION; ENVIRONMENTS
Abstract The study measured leaf gas exchange parameters and abundance of stable isotopes of C and N of three mangrove species (Rhizophora mangle L, Avicennia schaueriana Stapf & Leechm. ex Moldenke. and Laguncularia racemosa (L.) Gaertn) to investigate how photosynthetic capacity and water use efficiency characterize salt tolerance along an environmental gradient, in the Guaratuba Bay Estuary, Brazil, around 25 degrees S. Along the estuary, parallel to the river, nine 50 m(2) plots were marked: three plots at the fringe, three plots at the intermediary zone (around 150 m from the fringe), and three plots at the interior zone (around 350 m from the fringe), to represent the zonation pattern expressed by mangrove species. We used gas exchange parameters to calculate intrinsic water use efficiency (A(max)/g(s), WUEi). Long-term water use efficiency was calculated based on delta C-13 values, and delta N-15 values were related to source of N. Avicennia schaueriana showed the capacity to maintain high WUEi, even with high g(s) under higher salinities. The foliar delta C-13 of L. racemosa, was lower than the other species and negatively correlated to pore-water salinity. Rhizophora mangle gas exchange parameters did not correlate to the measured soil variables. Although the difference was not significant in R. mangle, delta N-15 values indicate that fringe mangroves may use a marine source of N. How species respond to changes in pore-water salinity is expressed in both gas exchange parameters and isotopic signature through the floodplain gradient. (C) 2016 Elsevier B.V. All rights reserved.
Author Address [Larcher, Leticia; Boeger, Maria Regina Torres] Univ Fed Parana, Dept Bot, POB 19073, BR-81531980 Curitiba, Parana, Brazil; [Sternberg, Leonel da Silveira Lobo O'Reilly] Univ Miami, Dept Biol, 1301 Mem Dr, Coral Gables, FL 33124 USA
Reprint Address Larcher, L (reprint author), Univ Fed Parana, Dept Bot, POB 19073, BR-81531980 Curitiba, Parana, Brazil.
E-mail Address leticialarcher@gmail.com; mrtboeger@gmail.com; leo@bio.miami.edu
Funding Agency and Grant Number Brazilian Research Council (CNPq) [473015/2011-0]; Improvement of Higher Education Personnel (CAPES-PDSE) [013809/2013-0]; CNPq [309386/2007-1]
Funding Text The Brazilian Research Council (CNPq) provided financial support to this study (473015/2011-0). We would like to thank to the Coordination for the Improvement of Higher Education Personnel (CAPES-PDSE) for granted a doctoral fellowship to L.L. (013809/2013-0) and CNPq for providing fellowship to M.R.T.B. (309386/2007-1). We also would like to thank the colleagues from the Molecular Ecology and Evolutionary Parasitology Lab (LEMPE - UFPR) for their help in fieldwork.
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Cited Reference Count 59
Publisher ELSEVIER SCIENCE BV
Publisher City AMSTERDAM
Publisher Address PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN 0304-3770
29-Character Source Abbreviation AQUAT BOT
ISO Source Abbreviation Aquat. Bot.
Publication Date AUG
Year Published 2016
Volume 133
Beginning Page 62
Ending Page 69
Digital Object Identifier (DOI) 10.1016/j.aquabot.2016.06.001
Page Count 8
Web of Science Category Plant Sciences; Marine & Freshwater Biology
Subject Category Plant Sciences; Marine & Freshwater Biology
Document Delivery Number DS1XR
Unique Article Identifier WOS:000380419000009
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