Variability of surface and underwater nocturnal spectral irradiance with the presence of clouds in urban and peri-urban wetlands

Jean Secondi; Valentin Dupont; Aurélie Davranche; Nathalie Mondy; Thierry Lengagne; Marc Thery

doi:10.1371/journal.pone.0186808

Variability of surface and underwater nocturnal spectral irradiance with the presence of clouds in urban and peri-urban wetlands

Jean Secondi ^{1, 2, 3} Valentin Dupont ² Aurélie Davranche ⁴ Nathalie Mondy ¹ Thierry Lengagne ¹ Marc Thery ⁵

1 LEHNA - Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés

2 GECCO - Groupe Ecologie et Conservation des Vertébrés

3 LTSER France, Zone Atelier Loire

4 LETG - Angers - Littoral, Environnement, Télédétection, Géomatique

LETG - Littoral, Environnement, Télédétection, Géomatique UMR 6554

5 MAOAC - Mécanismes adaptatifs : des organismes aux communautés

Abstract : Artificial light at night (ALAN) is an increasing phenomenon worldwide. It causes a wealth of biological and ecological effects that may eventually affect populations and ecosystems. Despite the growing concern about ALAN, little is known about the light levels species are exposed to at night, especially for wetlands and underwater habitats. We determined noctur- nal irradiance in urban and peri-urban wetlands above and under water, and assessed the effect of cloud cover on the variability of ALAN across the urban gradient. Even in aquatic habitats, cloud cover could increase irradiance beyond values observed during clear full moon nights. We report a negative relationship between baseline irradiance and the increase in irradiance during overcast nights. According to this result and previous studies, we propose that the change in the variation regime of ALAN between the urban center and rural land at its periphery is a usual feature. We discuss the ecological and evolutionary implications of this spatial variation in the urban and peri-urban environment.

Type de document :

Article dans une revue

PLoS ONE, Public Library of Science, 2017, 12 (11, (e0186808)), pp.1-13. 〈10.1371/journal.pone.0186808〉

Domaine :

Sciences de l'environnement / Biodiversité et Ecologie

Liste complète des métadonnées

https://hal-sde.archives-ouvertes.fr/hal-01643179
Contributeur : Nathalie Lyvet <>
Soumis le : mardi 21 novembre 2017 - 10:51:29
Dernière modification le : vendredi 14 septembre 2018 - 10:56:09

Variability of surface and underwater nocturnal spectral irradiance with the presence of clouds in urban and peri-urban wetlands

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Variability of surface and underwater nocturnal spectral irradiance with the presence of clouds in urban and peri-urban wetlands

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