Environmental and grazing influence on spatial variability of intertidal biofilm on subtropical rocky shores
نویسندگان
چکیده
منابع مشابه
Quantification of radular marks as a method for estimating grazing of intertidal gastropods on rocky shores.
Wax discs have been used previously on intertidal rocky shores to record the grazing activity of gastropods. This study has evaluated this methodology for recording grazing of four common intertidal microalgal grazers on intertidal shores in New South Wales, Australia. In the laboratory, the four species examined-the patellid limpet, Cellana tramoserica (Sowerby), the trochid, Austrocochlea por...
متن کاملEffects of eutrophication, grazing, and algal blooms on rocky shores
Eutrophication can profoundly change rocky shore communities. These changes often cause the replacement of perennial, canopy-forming algae such as Fucus spp. with annual, bloom-forming algae such as Enteromorpha spp. Grazing, however, can counteract eutrophication by eliminating the annual algae’s susceptible recruits. We examine these generalizations across large scales. We use replicated ‘‘bi...
متن کاملSpatial variability in community composition on a granite breakwater versus natural rocky shores: lack of microhabitats suppresses intertidal biodiversity.
Strong differences have been observed between the assemblages on artificial reefs and on natural hard-bottom habitats worldwide, but little is known about the mechanisms that cause contrasting biodiversity patterns. We examined the influence of spatial attributes in relation to both biogenic and topographic microhabitats, in the distribution and composition of intertidal species on both artific...
متن کاملRole of recruitment in causing differences between intertidal assemblages on seawalls and rocky shores
Following progressive urbanisation of coastal areas, artificial structures are becoming common features of landscapes in shallow waters. Despite this, few studies have focused on the ecological role of these structures or have attempted to assess the extent to which they can act as surrogates for natural habitats. This study investigated whether colonisation of space can determine the occurrenc...
متن کاملPatterns of Spatial Variation of Assemblages Associated with Intertidal Rocky Shores: A Global Perspective
Assemblages associated with intertidal rocky shores were examined for large scale distribution patterns with specific emphasis on identifying latitudinal trends of species richness and taxonomic distinctiveness. Seventy-two sites distributed around the globe were evaluated following the standardized sampling protocol of the Census of Marine Life NaGISA project (www.nagisa.coml.org). There were ...
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ژورنال
عنوان ژورنال: Marine Ecology Progress Series
سال: 2011
ISSN: 0171-8630,1616-1599
DOI: 10.3354/meps08981