Open patches arise from resident death or from newly created substrata

Evidence

Primary space is made avail­ able in two sorts of patches. The first (hereafter referred to as type 1) are created by death of some of the residents, leaving a patch bounded at least in part by the survivors; the second (type 2) are patches isolated from existing assemblages. Type 2 patches can arise either by the creation of new hard substrata, e.g., from recruit­ ment and growth of organisms with hard skeletons, e.g., coralline algae, corals, molluscs, etc., and from landslides or submarine lava flows, or on discrete existing substrata, e.g., cobbles overturned to expose either bare surface or organisms that are then removed by predators. — S. T. A. Pickett and P. S. White, eds., The Ecology of Natural Disturbance and…, 838

Categorization

• DEFINE: Foundational patch-type distinction (type 1 from resident death, type 2 from creation of new space) that reappears in Sousa’s chapter and throughout patch-dynamics theory.
• XREF: connects to: Patch size is set by distance between surviving regenerators, tracking mortality — S. T. A. Pickett and P. S. White, eds., The Ecology of Natural Disturbance and…, 887; Localized disturbances turn sessile assemblages into a patch mosaic — S. T. A. Pickett and P. S. White, eds., The Ecology of Natural Disturbance and…, 681

Broader Connections

• Localized disturbances turn sessile assemblages into a patch mosaic #expands (0.82) — S. T. A. Pickett and P. S. White, eds., The Ecology of Natural Disturbance and…, 681