We examine global patterns of benthic macroinvertebrate biomass and its distribution among functional feeding guilds in marine intertidal cOnmlunities. Variation in ash-free dry biomass was related to physical variables (mean annual air and water temperatures, sediment grain size, intertidal slope, tide range and type, wave height and exposure) by least-squares regression analysis of data for 3...

In northern Spain Sargassum muticum is abundant on sheltered shores and in tide pools on exposed shores, but is rare or absent at low-intertidal levels on exposed shores. An experiment on two shores indicated that S. muticum has an effective dispersal range of less than 5 m and that the presence of fertile plants in the immediate vicinity were required for settlement of large numbers of S. muti...

Seabird guano is recognized as a powerful fertilizer and its entry into the intertidal zone of seabird breeding islands off the west coast of South Africa is hypothesized to cause enhanced intertidal algal production. Intertidal nutrient levels and algal production were measured monthly on the shores of seabird islands and on nearby mainland shores where no aggregabons of seabirds occur. The sh...

Inflow of matter and organisms may strongly affect the local density and diversity of organisms. This effect is particularly evident on shores where organisms with aquatic larval stages enter the terrestrial food web. The identities of such trophic links are not easily estimated as spiders, a dominant group of shoreline predator, have external digestion. We compared trophic links and the prey d...

The limpet Patella vulgata L. is an important microphagous grazer on intertidal rocky shores of north-west Europe, occurring across the wave exposure gradient. Groups of P. vulgata were selected at mid-tide level of two exposed shores and two sheltered, fucoid dominated shores on the Isle of Man, British Isles, and manipulated to equivalent densities and population structure. The level of grazi...

e∈F x(e). M denotes the set of all perfect matchings of G. χ denotes the incidence vector of M . Cuts: A cut of G is a subset of E that is the coboundary ∂(S) of some subset S of V . For a cut C := ∂(S), S and S are the shores of C. A cut is trivial if one of its shores is a singleton. A cut is odd if both its shores have odd cardinality. Note: This is the notation used in Bondy and Murty’s boo...

e∈F x(e). M denotes the set of all perfect matchings of G. χ denotes the incidence vector of M . Cuts: A cut of G is a subset of E that is the coboundary ∂(S) of some subset S of V . For a cut C := ∂(S), S and S are the shores of C. A cut is trivial if one of its shores is a singleton. A cut is odd if both its shores have odd cardinality. Note: This is the notation used in Bondy and Murty’s boo...

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