Limpet grazing on a physically stressful Patagonian rocky shore

Effects of physical disturbance on a sub-Antarctic middle intertidal bivalve assemblage

“…Intertidal predators Á frequently responsible for the 'top-down' control of the community (e.g. Moreno et al 1986;Menge 2000) Á are very few or lacking, and are found to be less important in the community structuring than in many other intertidal communities (Bertness et al 2006;Bazterrica et al 2007;Hidalgo et al 2007). Along the southern South American Atlantic coast, the hard bottom intertidal zone is characterized by the predominance of bivalves Brachidontes rodriguezi (d'Orbigny, 1846) (north to 388S), Perumytilus purpuratus (Lamarck, 1819) (0 Brachidontes purpuratus, ca.…”

“…Along the southern South American Atlantic coast, the hard bottom intertidal zone is characterized by the predominance of bivalves Brachidontes rodriguezi (d'Orbigny, 1846) (north to 388S), Perumytilus purpuratus (Lamarck, 1819) (0 Brachidontes purpuratus, ca. 42Á448S) or Mytilus chilensis Hupé 1854 (south to 478S) that form dense beds (Olivier et al 1966;Penchaszadeh 1973;Zaixso & Pastor 1977;Zaixso et al 1978;Sánchez & Zaixso 1995;Adami et al 2004;Bazterrica et al 2007;Hidalgo et al 2007;Kelaher et al 2007). Along the Patagonian coastline, B. rodriguezi or P. purpuratus dominate the mussel beds in warm temperate or in cold temperate waters, respectively (Liuzzi & Ló pez Gappa 2008).…”

Monitoring the Intertidal Environment with Biomimetic Devices

“…Wind, in combination with low humidity, has been suggested as a dominant physical stressor on some rocky shores (Bertness et al, 2006;Bazterrica et al, 2007). The scope of quantifiable parameters is limited in this data logger, allowing several options for interpretation.…”

Variability and community organization in moderately exposed tropical rocky shore algal communities as influenced by different consumer groups

“…Physical factors are important in rocky shores such as in the windswept shores of Patagonia (Bazterrica et al 2007) and in seasonal shores during the summer such as in Hong Kong (Williams 1993a(Williams and 1993b(Williams , 1994 and in wave exposed shores (Dayton 1971;Lubchenco and Menge 1978) but its effects in creating new spaces which are paramount to all organism in the rocky shores can be masked or simply become secondary to biological factors (Benedetti-Cecchi et al 2001) or another physical factor (Vinueza et al 2006). During the early phase of this experiment, fenced treatments in the two Stanley sites were not as efficient in excluding grazers as expected.…”

“…Although the grazer-alga food chain is important, it is not the sole structuring force in tropical rocky shores; it can be affected by other factors such as oceanographic forcing like ENSO (El Niño Southern Oscillation) cycles (Vinueza et al 2006), by seasonal cycles (Williams 1993a(Williams , 1993b(Williams , 1994, number of recruits (Kaehler and Williams 1997), predators (Menge et al 1986a) and complex interactions (Sauer Machado et al 1996). In temperate rocky shores, grazers are also affected by nutrient subsidies (Bustamante et al 1995), the availability of recruits (Freidenburg et al 2007), desiccation and high winds (Bazterrica et al 2007), disturbance such as storms, sand and ice scour (McQuaid and Dower 1990;Chapman 1991, 1993;Underwood 1999), upwelling and oceanographic conditions (Menge et al 2003).…”