IIMYC   23581
INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Unidad Ejecutora - UE
artículos
Título:
Effects of Ficopomatus enigmaticus ecosystem‐engineered habitat structure on population parameters of the amphipod Melita palmata : A NIS‐NIS interaction study
Autor/es:
ÁLVAREZ, GRACIELA; BARÓN, PEDRO J.; BAZTERRICA, MARÍA CIELO; OBENAT, SANDRA M.
Revista:
MARINE ECOLOGY-PUBBLICAZIONI DELLA STAZIONE ZOOLOGICA DI NAPOLI I
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2020 vol. 41 p. 1 - 21
ISSN:
0173-9565
Resumen:
The variability of some population (demo) parameters of the gammarid amphipodMelita palmata was associated with contrasting habitat structures created by thenon-indigenous reef-builder polychaete Ficopomatus enigmaticus in the Mar Chiquitacoastal lagoon (37°40 S, 57°23 W, Argentina). Sampling of M. palmata was conductedbiweekly during the reproductive period in F. enigmaticus reefs and sediment fromreef-free areas, accounting for the vertical distribution and the presence/absence ofmacroalgae. Males, females (non-ovigerous and ovigerous), and juveniles are presentin both reefs and sediment, but the abundance of M. palmata is several orders ofmagnitude higher in reefs. Reefs? M. palmata population (demo) displays variations in:(a) abundance, (b) mean size, and (c) proportions of demographic categories. In reefs,females show a higher proportion of ovigerous specimens and a female-biased sexratio, contrasting the 1:1 ratio observed in sediment. Individuals are more abundantin the surface layer covered with macroalgae in reefs (small sizes) and macroalgae orvalves in sediment. The association of M. palmata to F. enigmaticus reefs drives itspermanency in the system, enhancing its reproductive potential via different reproductivetraits and habitat use, with a reduced potential to spread to marginal areas.