Ecotone dependent recruitment of a desert shrub, Flourensia cernua, in vegetation stripes

摘要: In tropical semi-arid areas, a local concentration of water on sheet wash surfaces allows the persistence densely vegetated stripes parallel to contour lines, alternating with almost bare soil stripes. The boundaries are, upslope, colonization ecotone, and, downslope, regressive thus inducing slow upwards displacement. This formation, recently described in Chihuahuan Desert (Mexico), is known from Africa and Australia. Flourensia cernua dominant shrub species whose distribution suggests that its population dynamics strongly dependent upslope ecotone. spatial restrictions recruitment were determined analyzing location seedlings, young individuals adults, grass cover (Hilaria mutica), 10 two-meter-wide belts perpendicular 5 (...)