The spectral and spatial distribution of light pollution in the waters of the northern Gulf of Aqaba (Eilat).

摘要: The urbanization of the shores Gulf Aqaba has exposed marine environment there, including unique fringing coral reefs, to strong anthropogenic light sources. Here we present first in situ measurements artificial nighttime under water such an ecosystem, with irradiance measured 12 wavelength bands, at 19 measurement stations spread over 44 square km, and 30 depths down 30-m depth. At 1-m depth, find downwelling values that vary from 4.6 × 10−4 μW cm−2 nm−1 500 m city 1 × 10−6 μW cm−2 nm−1 center gulf (9.5 km city) yellow channel (589-nm wavelength) 1.3 × 10−4 μW cm−2nm−1 4.3 × 10−5 μW cm−2 nm−1 blue (443-nm wavelength). Down 10-m 1 × 10−6 μW cm−2nm−1 2.6 × 10−5 μW cm−2 nm−1 1.3 × 10−4 μW cm−2 nm−1 channel, even detected a signal This could influence biological processes as tuning circadian clocks, synchronization spawning, recruitment competition, vertical migration demersal plankton, feeding patterns, prey/predator visual interactions.