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Coral Gametogenesis Collapse under Artificial Light Pollution.

Inbal Ayalon¹, Yaeli Rosenberg², Jennifer I C Benichou²

¹Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan 52900, Israel; The H. Steinitz Marine Biology Laboratory, The Interuniversity Institute for Marine Sciences of Eilat, PO Box 469, Eilat 88103, Israel; Porter School of the Environment and Earth Sciences, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 39040, Israel.

Current Biology : CB

|November 6, 2020

Summary

Artificial light at night (ALAN) disrupts coral reproduction by delaying gametogenesis and unsynchronizing gamete release. This light pollution poses a significant threat to already vulnerable coral reef populations globally.

Keywords:

artificial light at night coral reefs gametogenesis marine

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Area of Science:

Marine Biology
Ecology
Environmental Science

Background:

Artificial light at night (ALAN) negatively impacts human and ecosystem health.
Marine organisms, especially corals, depend on natural light cycles for critical life processes.

Purpose of the Study:

To investigate the effects of light pollution on coral reproduction.
To assess the impact of ALAN on gametogenesis and gamete release in Indo-Pacific coral species.

Main Methods:

Studied two coral species: Acropora millepora and Acropora digitifera.
Observed the effects of artificial light on reproductive processes.
Conducted a worldwide-modeled impact assessment of light pollution.

Main Results:

Light pollution caused delayed gametogenesis in corals.
ALAN led to unsynchronized gamete release in studied coral species.
Identified a global threat of light pollution to coral reef populations.

Conclusions:

Artificial light at night significantly disrupts coral reproductive cycles.
Light pollution exacerbates threats to coral reefs, particularly in urbanized coastal areas.
Incorporating light pollution data is crucial for effective coral reef conservation planning.