Relative fishing activity, population pressure, mangrove biomass and oil rigs in West, Central and Southern Africa
Sources: Relative fishing activity was determined as the sum of normalized stressor magnitude values calculated for artisanal, demersal, and pelagic fishing activities in 2006 (Halpern, Frazier et al., 2015; Halpern, Frazier et al., 2015); population pressure was defined as the summed presence of three stressors: urban areas in 2001-2002 (Schneider, Friedl et al., 2003; Schneider, Friedl et al., 2009, Schneider, Friedl et al., 2010), high population density areas (>399 people/km2) in 2000 (Bright and Coleman, 2001; Bright and Rose, 2014), and oil rigs for 2004-2006 (Halpern, Frazier et al., 2015; Halpern, Frazier et al., 2015), where 3 = all stressors, 2 = two of any stressors, and 1 = any one stressor); mangrove biomass for mangroves classified <40 m high in 1999-2000 (Fatoyinbo and Simard 2013); 30 mile coastal buffer created in ESRI ArcMap 10.3 from the coast (GADM 2015); 200 nm land buffer (VLIZ 2014).
Year: 2017
From collection: Blue Carbon Financing of Mangrove Conservation In The Abidjan Convention Region
Cartographer: Connie Kot, Duke University Marine Geospatial Ecology Lab