Gas exchange and isotopic signature of mangrove species in Southern Brazil

Larcher, Letícia; Boeger, Maria Regina Torres; Sternberg, Leonel da Silveira Lobo

doi:10.1016/j.aquabot.2016.06.001

Cited by 10 publications

(5 citation statements)

References 48 publications

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“…Guebert- Bartholo et al 2011). Mangrove isotope values were obtained by values presented in the literature from Guaratuba Bay, also in the state of Paraná (Larcher et al 2016). The 'invertebrate' group reflects mean isotope values of 32 species from the region and obtained from the literature, including depositivorous (5), carnivorous (7) and suspensivorous (20) species (Table A1 in the Appendix; Corbisier et al 2006, Vinagre et al 2018.…”

Section: Discussionmentioning

confidence: 99%

Trophic ecology of juvenile green turtles in the Southwestern Atlantic Ocean: insights from stable isotope analysis and niche modelling

Gama

Fuentes

Trevizani

et al. 2021

Mar. Ecol. Prog. Ser.

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Determining the diet and trophic status of endangered species can provide insights into their key habitats and predator-prey relationships, both essential for conservation. Integrating dietary information from live-captured and dead-stranded turtles from the same area can also shed light on their ecological diversity. Here, diet intake and prey diversity are determined for juvenile green turtles Chelonia mydas from a mixed stock foraging aggregation in the Southwestern Atlantic Ocean (SWAO) using stable carbon (δ13C) and nitrogen (δ15N) isotope analysis. Skin samples were collected from 117 live-captured (LC) turtles and 66 dead-stranded (DS) individuals along the Paraná coast, southern Brazil. Bayesian isotope ellipse space was determined using the program SIBER. A larger isotopic niche space was found among DS turtles, probably because it included long-term resident turtles and recently settled individuals, the latter of which presented low δ15N values compared to larger putative local turtles. The Bayesian stable isotope mixing model MixSIAR was used to determine dietary contributions, using isotopic values of putative prey. MixSIAR results indicated invertebrates and macroalgae as primary prey groups, showing the omnivorous strategy of green turtles in the SWAO. Moreover, many of the smallest DS turtles had δ15N values suggestive of seagrass consumption, which may reflect individual- and/or life-stage-based diet variability. These findings underscore the value of integrating stranding monitoring protocols with research on live green turtles to evaluate habitat use and diet intake assembled in a neritic foraging area. The data also further knowledge about green turtle foraging ecology and are relevant for species and habitat conservation throughout the SWAO.

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Section: Discussionmentioning

confidence: 99%

Trophic ecology of juvenile green turtles in the Southwestern Atlantic Ocean: insights from stable isotope analysis and niche modelling

Gama

Fuentes

Trevizani

et al. 2021

Mar. Ecol. Prog. Ser.

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“…Although the technique has been applied to several studies related to water and salt stress, its use in mangal areas is still restricted, but it can provide relevant information on the ecophysiological dynamics of mangrove species under field conditions (Naidoo et al 2002, Gonzalez-Mendoza et al 2007, Falqueto et al 2008Pascoalini 2014, Lopes et al 2019, Tognella et al 2022. Furthermore, gas-exchange measurements of mangroves have been widespread and very useful because they provide information on photosynthesis and water-use efficiency quickly and reliably in field conditions (Medina 1999, Soares et al 2015, Larcher et al 2016. Assessing the photochemical process through Chl a fluorescence measurements and photosynthesis through gas exchange allow the understanding of sink effects on photosynthesis, from leaf light capture to release of chemical energy.…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic efficiency of young Rhizophora mangle L. in a mangrove in southeastern Brazil

Pascoalini¹,

Tognella²,

Falqueto³

et al. 2022

Photosynt.

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PITotal -performance index for energy conservation from exciton to the reduction of PSI end acceptors; PN -net photosynthetic rate; Qleaf -luminous intensity incident on the leaf surface; TR0/RC -trapped energy flux per RC; WUE -water-use efficiency; δR0efficiency with which an electron from the intersystem reduces the final acceptor of PSI; φD0 -maximum efficiency of nonphotochemical de-excitation; φE0 -quantum yield for electron transport; φP0 -maximal quantum yield of PSII photochemistry; Ψ0 -the probability of electron transport further than QA -.

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“…Despite of its high primary production (Ball, 1996), mangroves are stressful environments to plant development due to high water salinity influenced by periodic tidal flooding, low oxygenation, and unconstrained soil (Lüttge, 2008). The vegetation associated to this ecosystem has specific adaptations to establish and thrive in halophytic environments (Krauss, Lovelock, McKee, López-Hoffman, Ewe, & Sousa, 2008), resulting in a set of adaptations in their structural, ecophysiological and functional characteristics (Pascoalini, Falqueto, & Tognella, 2014;Larcher, Boeger, & Sternberg, 2016).…”

mentioning

confidence: 99%

Wood anatomy of Laguncularia racemosa (Combretaceae) in mangrove and transitional forest, Southern Brazil

Jantsch

Júnior

Amorim

et al. 2018

RBT

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Mangroves represent an environment of great heterogeneity and low diversity of plant species that have structural and physiological adaptations linked to a high salinity environment. Laguncularia racemosa is a typical tree species in mangroves and transitional zones. This study aimed to compare the wood anatomy of L. racemosa (Combretaceae) in two different forests (mangroves and transitional forests), which have different soil conditions. For this, we obtained wood and soil samples in March 2016. We analyzed soil nutritional contents in one 15 cm deep soil sample per forest type. In addition, we selected five mangrove trees in each formation for wood anatomy analysis and took one wood sample per individual, per area. We prepared histological slides and separated materials following standard methods for wood anatomy studies. Soil analysis showed that mangrove soils had higher phosphorus, potassium and calcium contents. The transitional soil had lower pore water salinity and soil pH, probably due to high aluminum levels. Anatomical attributes differed between different forest populations. In the different wood aspects evaluated, we obtained higher values in mangrove individuals when compared to the transitional forest population: vessel elements length (375.79 mm), tangential vessels diameter (75.85 mm), frequency of vessels (11.90 mm) and fiber length (889.89 mm). Moreover, parenchyma rays height was larger in the samples of the transitional forest (392.80 mm), while the mangrove population presented wider rays (29.38 mm). The structure of the secondary xylem in the studied species apparently responds to edaphic parameters and shows variations that allow it to adjust to the environmental conditions. The population of the transitional forest showed a secondary xylem that invests more in protection than the mangrove population. Rev. Biol. Trop. 66(2): 647-657. Epub 2018 June 01.

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Gas exchange and isotopic signature of mangrove species in Southern Brazil

Cited by 10 publications

References 48 publications

Trophic ecology of juvenile green turtles in the Southwestern Atlantic Ocean: insights from stable isotope analysis and niche modelling

Trophic ecology of juvenile green turtles in the Southwestern Atlantic Ocean: insights from stable isotope analysis and niche modelling

Photosynthetic efficiency of young Rhizophora mangle L. in a mangrove in southeastern Brazil

Wood anatomy of Laguncularia racemosa (Combretaceae) in mangrove and transitional forest, Southern Brazil

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