Ecological impacts of two non-indigenous macroalgae on an urban rocky intertidal shore

PALOMO, MARIA GABRIELA; BAGUR, MARÍA; QUIROGA, MARINA; SORIA, SABRINA ANDREA; BUGNOT, ANA

MARINE BIOLOGY

SPRINGER

Lugar: Berlin; Año: 2016 vol. 163 p. 1 - 12

0025-3162

Non-indigenous marine species often change the abundance and diversity of native species incoastal ecosystems. On the SW Atlantic coast, the macroalgae Ahnfeltiopsis sp.(Rhodophyta, Phyllophoraceae) and Schizymenia dubyi (Rhodophyta,Schizymeniaceae) have invaded the intertidal rocky shore of Mar del Plata,Argentina (38°S, 57°W). To study the spread and ecological associations ofthese invasive species, algal abundance, biomass and biodiversity of benthicassemblages at three different tidal levels were examined during five years.Sparse Ahnfeltiopsis sp. thalli (3 % cover) were detected in February 2007 atthe three tidal levels. By January 2011, its cover had increased to 11 %, whileits biomass showed a 27-fold increase. S. dubyi was detected at the lowerintertidal level Non-indigenous marine species often change the abundance anddiversity of native species in coastal ecosystems. On the SW Atlantic coast,the macroalgae Ahnfeltiopsis sp. (Rhodophyta, Phyllophoraceae) and Schizymenia dubyi(Rhodophyta, Schizymeniaceae) have invaded the intertidal rocky shore of Mardel Plata, Argentina (38°S, 57°W). To study the spread and ecologicalassociations of these invasive species, algal abundance, biomass andbiodiversity of benthic assemblages at three different tidal levels wereexamined during five years. Sparse Ahnfeltiopsis sp. thalli (3 % cover) weredetected in February 2007 at the three tidal levels. By January 2011, its coverhad increased to 11 %, while its biomass showed a 27-fold increase. S. dubyiwas detected at the lower intertidal level.