Centrality
Measures of how important a node is within a network, by connections, by position, or by the flow it carries.
Why it matters now
Effort is always finite, so knowing which node carries the most flow is how conservation budgets get spent well. Keystone species, bridging habitat patches, and critical substations are all high-centrality nodes, and protecting them returns more per unit of effort than any uniform approach.
Where this is happening on Earth
- North AmericaSea otters in the North Pacific kelp systemA single species whose presence or absence determines whether kelp forest or urchin barren prevails.
- AfricaElephant movement corridors in the Kavango-Zambezi conservation areaA few narrow passages carry most of the continental-scale movement across five countries.
- AsiaStrait of Malacca in global shippingOne channel through which a very large share of world trade and fuel must pass.
- EuropeWadden Sea stopover on the East Atlantic flywayA single coastline on which millions of migratory birds from three continents depend.
- South AmericaAndean páramo wetlands above Bogotá and QuitoSmall high-altitude areas supplying water to very large downstream populations.
The idea itself
The encyclopedia entry first, then live searches at journals and magazines that keep returning current work on this specific idea.
Current reporting from around the world
Standing feeds at reputable periodicals. These stay fresh on their own, which is why they are here instead of a list of articles that would be out of date within a season.