NATURE

Sea, land, river

ECONOMY

Regional

PLACE

Books+

PEOPLES

Community

HOME

Biological control of mid-intertidal	Seastars as predator
	Amazing, to me, how Pisaster seastars control mid intertidal zone

July

GONE!!

August

The Semibalanus barnacle juveniles (spat) grew very fast (May – July)

New SPAT

and then the Pisaster gangs moved in and removed everything by late August

See page

Bleaching upper intertidal algae hypothesis: physical causes Thus Cornu and Masto “turfs” explained too. Here I look at grazers as (top down) but accept physical (bottom up) type explanation

Periwinkles at season peak; then use ‘Prasiola strategy’—

Long and narrow vs short and squat’; checkered vs ‘grooved’

Limpets juveniles settling; piggy limpet named & w juveniles

Piggy named

Birds Gulls cormorants peregrine

Seasons: in pass; (porpyra; acrosiphonia) lower

Bay; grazers Diatoms

Created by LG on 9/10/2004