Ecological Speciation and the Intertidal Snail Littorina saxatilis
Figure 1
Example shores for the three systems. (a) The Galician shore at Cape Silleiro: the photograph looks down the shore from the RB habitat. (b) The British shore at Thornwick Bay: the H habitat is the near-vertical cliff and the M habitat the boulder field below. (c) The Swedish shore at Saltö: the S habitat is the foreground boulders and the E habitat the promontory beyond the bay. The abbreviations for the ecotypes (RB, etc.) are explained in the text.
