Accumulated Pressure Index (API)
Description
This spatial data "Accumulated pressure index (API)" is a result by paper "Cumulative ecosystem pressures exerted by demersal fisheries in the Brazilian Meridional Margin: hotspots and refuges". The Index were represented spatially, using a 20 x 20 nm quads mesh grid, API of each quad was computed by summing normalized values all forms of environmental pressure produced by all fishing trips that visited each quad in 2018.
Files
Steps to reproduce
An Accumulated Pressure Index (API) was built to express the total amount of pressure exerted simultaneously by the demersal fisheries within each quad (q) on the Brazilian Meriodional Margin in 2018. The API sums the total amount of disturbance of the seabed, mortality of megafauna and biomass discarded by the demersal fishing, estimated for each quad, weighed by coefficients (method: Analytic Hierarchy Process - AHP) that express their potential for pressing (i.e. modifying) the benthic ecosystem. Quad values were divided into five categories using the quantile method: ‘very high’, ‘high’, ‘medium’, ‘low’, and ‘very low’.