Effects of macroalgae on the recruitment, growth, and body condition of an invasive reef forming polychaete in a south-western Atlantic coastal lagoon

摘要: Species interactions could mediate species invasive processes. In Mar Chiquita coastal lagoon (37° 40′S, 57° 23´W, Argentine), the reef building polychaete Ficopomatus enigmaticus (Fauvel 1923) enhances biomass of red alga Polysiphonia subtilissima Montagne 1840 on surfaces, and excludes green macroalgae (mainly Cladophora sp. Kutzing, 1843) from sediment between reefs. turn, have several community structuring effects (e.g., as food or by competing for space). Therefore, may affect F. enigmaticus. To evaluate this hypothesis we studied (1) interaction during colonization new substrates (2) recruitment, growth, body condition Field sampling experiments suggested a lack competition substrates. However, there was positive effect warm season, since its tube length, were higher in areas with surfaces. Considering that previous studies showed reefs positively macroalgae, our results suggest is feedback created established reefs' growing season. This contribute to maintenance growth