info:eu-repo/semantics/article
Biomass, decomposition and nutrient cycling in a SW Atlantic Sarcocornia perennis marsh
Fecha
2015-03Registro en:
Negrin, Vanesa Lorena; Pratolongo, Paula Daniela; de Villalobos, Ana Elena; Botté, Sandra Elizabeth; Marcovecchio, Jorge Eduardo; Biomass, decomposition and nutrient cycling in a SW Atlantic Sarcocornia perennis marsh; Elsevier; Journal Of Sea Research; 97; 3-2015; 50-55
1385-1101
Autor
Negrin, Vanesa Lorena
Pratolongo, Paula Daniela
de Villalobos, Ana Elena
Botté, Sandra Elizabeth
Marcovecchio, Jorge Eduardo
Resumen
Biomass dynamics, decomposition and nutrient cycling were studied in a Sarcocornia perennis salt marsh in the Bahia Blanca estuary (Argentina) to achieve a better understanding of these processes and provide information about a species and a region underrepresented in the literature. Above and belowground biomass stocks and carbon (C), nitrogen (N) and phosphorus (P) concentration in plant tissues were monitored every two months during a year. Decomposition rate and the concentration of C, N and P during the process were also estimated in above and belowground tissues. Biomass values were low (mean of 363 ± 43 and 242 ± 27 g m-2 for aboveground and belowground tissues, respectively), presumably associated to the high salinity of this estuary. The general trend of higher values for aboveground biomass is in agreement with other reports for this species and has an effect on nutrients pools, which are higher for aboveground tissues for C and N. Above and belowground decomposition rates were high (64 and 70 % after a year, respectively), meaning this process play a significant role in the cycling of organic matter. C/N and C/P ratios changed during decomposition, but final ratios were usually higher, suggesting a net release of nutrients. Our results indicate that significant amounts of C, N and P are recycled by S. perennis, highlighting the role of this species and suggesting important consequences of its lost in the study area