Animal diversity in Baltic rocky shore macroalgae: can Cladophora glomerata compensate for lost Fucus vesiculosus?

摘要: The substitution of canopy-forming perennial algae by annual filamentous is a common phenomenon on eutrophicated rocky shores with potential consequences for marine biodiversity. In the upper littoral northern Baltic Sea, this process exemplified decreased occurrence brown alga Fucus vesiculosus and increased amounts (e.g. Cladophora glomerata Pilayella littoralis). study, macrofauna communities F. C. during summer have been compared effects macroinvertebrates total or partial replacement estimated. animal abundance biomass were higher in than corresponding (g dwt). Similar results also obtained when extrapolated to algal cover per m 2 substrate study area. Margalef’s species richness was, other hand, vesiculosus, whereas Shannon–Wiener diversity was same. indicate that maintains high zone Sea summer. A possible does not immediately affect macroinvertebrate negatively zone, although, it difficult assess full due lack comparable data at wider temporal spatial scales. 2004 Elsevier Ltd. All rights reserved.