Behaviour of sea urchin Strongylocentrotus droebachiensis grazing fronts: Food-mediated aggregation and density-dependent facilitation

Agriculture & Biology

• Strongylocentrotus droebachiensis 100%
• Echinoidea 67%
• grazing 53%
• macroalgae 42%
• fronds 38%
• biomass 19%
• Strongylocentrotus nudus 17%
• Laminaria digitata 16%
• Nova Scotia 13%
• temporal variation 11%
• food availability 10%
• seasonal variation 9%
• concentrates 8%
• coasts 8%

Earth & Environmental Sciences

• facilitation 75%
• grazing 56%
• food 44%
• sea 34%
• removal 12%
• biomass 10%
• food availability 6%
• wave height 6%
• temporal variation 4%
• seasonal variation 4%
• coast 3%
• rate 1%
• effect 1%