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Authors Martin, JP; Lizarralde, ZI; Sar, A; Pittaluga, S; Perroni, M; Torres, S
Author Full Name Martin, J. P.; Lizarralde, Z., I; Sar, A.; Pittaluga, S.; Perroni, M.; Torres, S.
Title Salt marshes of the south of Santa Cruz, southern Patagonia, Argentina
Source INFORMES CIENTIFICOS Y TECNICOS
Language Spanish
Document Type Article
Author Keywords Southern Patagonia; salt marsh; plant biomass
Keywords Plus SPARTINA-ALTERNIFLORA; PLANT ZONATION; DECOMPOSITION; CORDGRASS; BIOMASS; DELTA
Abstract The coastal zone of southern Patagonia, characterized by a macrotidal regime, allows the development of extensive salt marshes in estuaries and bays, which have been little studied. In order to characterize the marshes of the south of Santa Cruz, identify the main vegetal assemblages and analyze the variations of the vegetal biomass in relation to the tidal level and the time of the year, three samplings were carried out in spring (November 2015), summer (February 2016) and winter (August 2016) in San Julian Bay and the estuaries of the Santa Cruz, Coyle and Gallegos rivers. The samplings were performed using a stratified random design, dividing the salt marsh into three levels: high, middle and low. Six samples of 0.25 m(2) were collected at each level, and the percentage of coverage of each species and its aerial biomass (dry weight) was determined. Substrate grain size and organic matter content of the sediment (%) were also determined. The data were analyzed by factorial ANOVA (locality, level, and season of the year). The substrate in all localities and levels consisted mainly of silt-clays (54 to 88%) and fine sand (20 to 44%). Organic matter content varied between 4.5 and 7.1%. Five plant species were recorded: Sarcocornia perennis, Puccinellia glaucescens, Suaeda argentinensis, Limonium brasiliense and Spartina sp. S. perennis was the dominant species in almost all localities and levels, with the exception of the high and the middle saltmarsh of San Julian Bay, where it codominates with Limonium brasiliense, and the low marsh of the estuary of the Santa Cruz River, where it codominates together with Spartina sp. The total aerial vegetation biomass reached its maximum value (1700 g m(-2)) during the summer in the low marsh of the estuary of the Gallegos river; all the biomass corresponded to S. perennis. The lowest value of total biomass (177 g m(-2)) was recorded in the high marsh of San Julian Bay during the winter and corresponded in 33.8% to S. perennis. The coverage of S. perennis varied between 23 and 100%, being always higher in the low marsh. Spartina sp. was found only in the low marsh of the estuary of the Santa Cruz River, site that constitutes the southernmost record for this halophyte on the Argentina coast.
Author Address [Martin, J. P.; Sar, A.; Torres, S.] Univ Nacl Patagonia Austral, Unidad Acad San Julian, Inst Ciencias Ambiente Sustentabilidad & Recursos, San Julian, Argentina; [Lizarralde, Z., I; Pittaluga, S.; Perroni, M.] Univ Nacl Patagonia Austral, Unidad Acad Rio Gallegos, ICASUR, Rio Gallegos, Argentina; [Martin, J. P.; Lizarralde, Z., I; Sar, A.; Pittaluga, S.; Perroni, M.; Torres, S.] UNPA, UTN, CONICET, Ctr Invest & Transferencia Santa Cruz, Rio Gallegos, Argentina
Reprint Address Martin, JP (corresponding author), Univ Nacl Patagonia Austral, Unidad Acad San Julian, Inst Ciencias Ambiente Sustentabilidad & Recursos, San Julian, Argentina.; Martin, JP (corresponding author), UNPA, UTN, CONICET, Ctr Invest & Transferencia Santa Cruz, Rio Gallegos, Argentina.
E-mail Address martin_jpablo@yahoo.com.ar
Publisher UNIV NAC PATAGONIA AUSTRAL
Publisher City SANTA CRUZ
Publisher Address RIVADAVIA 265, RIO GALLEGOS, SANTA CRUZ, 9400, ARGENTINA
ISSN 1852-4516
29-Character Source Abbreviation INF CIENTIF TECN
ISO Source Abbreviation Inf. Cientif. Tecn.
Year Published 2019
Volume 11
Issue 1
Beginning Page 140
Ending Page 153
Digital Object Identifier (DOI) 10.22305/ict-unpa.v11i1.778
Page Count 14
Web of Science Category Multidisciplinary Sciences
Subject Category Science & Technology - Other Topics
Document Delivery Number KI4BN
Unique Article Identifier WOS:000511293500010
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