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Mowing the lawn	Do grazers control vegetation on seashore?
	Limpet (center left of cleared area) keeps the Prasiola (green alga) cleared

2 limpets (right)

A Ligia is on Prasiola

(left)

Had company 3 months ago

But sitting almost exact spot (see below)

--- note area to right more cleared though in June (and see below)

Here is 1 meg MPG file on this grazer as at left ---

	Lottia digitalis close up
	I could feel a slight depression (dotted line) and the limpet was inside it – which ‘explains’ how it ‘homes’ to same spot. I also have added a yellow line to make its shell more visible

	Grazers and Increasing sunlight have effect
	June 19^th 2003 – Prasiola on way (seasonal decline) while the red crust more prominent—cleared areas attributable to limpets (L digitalis)

Created by LG Thursday, June 19, 2003