Just four photos portraying familiar beach and rocky intertidal boundaries. These boundaries frequently serve as frames of reference for my intertidal tales.

Beach Boundaries

A pioneering dunegrass, Elymus, forges down toward the back beach
A pioneering dunegrass, Elymus, forges down off the safety of the foredune onto the backshore
Big waves and high tides push the big wood up into the wrack line
A wrack line forms when king tides and storm surge push all the big wood up onto a shelf on the backshore

Boundaries on the Rocks

A clean boundary between Anthopleura elegantisimma and A. xathogrammica
Boundaries between the anemones Anthopleura elegantissima and A. xathogrammica come and go
Katharina tunicata creates boundaries by maintaining a little open space
In a crowded world, the chiton, Katharina tunicata, creates boundaries by maintaining a little open space

In response to The Daily Post’s weekly photo challenge: “Boundaries.”

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