Impacts of Artificial Light at Night (ALAN) on coastal ecosystems: A study on the herbivore Ampithoe valida with focus on sex-dependent responses

Feb 2, 2025Marine pollution bulletin

Artificial Light at Night Affects Coastal Ecosystems: Sex Differences in Responses of the Herbivore Ampithoe valida

AI simplified

Circadian Biology on OpenScience ↗PubMed ↗DOI ↗

Abstract

Females of the amphipod Ampithoe valida showed a substantial reduction in nighttime food consumption rates under Artificial Light at Night conditions.

Females had higher food consumption rates during the night under natural light conditions compared to males, who showed no significant variation.
Under Artificial Light at Night, females exhibited a decrease in both food consumption rates and absorption efficiency, indicating potential stress.
Males increased their nighttime food consumption rates when exposed to Artificial Light at Night, suggesting adaptation to a new ecological niche.
The observed differences in response to Artificial Light at Night highlight the importance of considering sex-dependent variability in ecological research.

AI simplified

Artificial Light at Night is recognized for its impact on various ecosystems, with coastal areas being particularly vulnerable. While a growing number of studies have identified Artificial Light at Night's impacts on species inhabiting these ecosystems, a critical gap is the limited attention that has been given to intraspecific variability in response to this stressor. This study focused on the sex-dependent influence of Artificial Light at Night on food consumption rates and absorption efficiency in males and females of the non-indigenous amphipod Ampithoe valida. Males and females were exposed to two light treatments: a natural light/dark cycle and Artificial Light at Night. Our hypothesis was that Artificial Light at Night alters the amphipod's food consumption rates and absorption efficiency, but the magnitude of these impacts is sex-dependent. Results showed that females had higher nocturnal food consumption rates under control conditions, while males showed no significant diel food consumption rates. Under Artificial Light at Night conditions, females experienced a substantial reduction in nighttime food consumption rates and absorption efficiency, suggesting stress or disrupted circadian rhythms. In contrast, males increased their nighttime food consumption rates under Artificial Light at Night, possibly exploiting a new light-induced niche. These findings highlight the need for further research on the ecological consequences of intraspecific variation in the responses to Artificial Light at Night, particularly regarding the management and conservation of ecosystems impacted by non-indigenous species.

Full Text

Full text is available at the source.

View full text (XML) ↗View full text ↗

Impacts of Artificial Light at Night (ALAN) on coastal ecosystems: A study on the herbivore Ampithoe valida with focus on sex-dependent responses

Abstract

Full Text

You found one interesting study. We’ll send the next 7.

what lands in your inbox each week:

Recent issues from the circadian biology brief

Abstract

Full Text

Related papers

You found one interesting study. We’ll send the next 7.

what lands in your inbox each week:

Recent issues from the circadian biology brief