TIPOLOGIA

Articolo

MACROAREA

I grandi cambiamenti

ANNO

2021

PUBBLICO

Adulti

LINGUA

English

KEYWORDS

ecosistema marino Marine litter Microplastics Marine plastic barrier reef microplastiche environmental emergencies Environmental problems climate change ocean

ALLEGATI

Scarica l'articolo

Multiple impacts of microplastics can threaten marine habitat-forming species

Microplastics are recognised as a potential global threat to marine ecosystems, but the biological mechanisms determining their impact on marine life are still largely unknown.

Here, we investigated the effects of microplastics on the red coral, a long-lived habitat-forming organism belonging to the Corallium genus, which is present at almost all latitudes from shallow-water to deep-sea habitats. When exposed to microplastics, corals preferentially ingest polypropylene, with multiple biological effects, from feeding impairment to mucus production and altered gene expression.

Microplastics can alter the coral microbiome directly and indirectly by causing tissue abrasions that allow the proliferation of opportunistic bacteria. These multiple effects suggest that microplastics at the concentrations present in some marine areas and predicted for most oceans in the coming decades, can ultimately cause coral death. Other habitat-forming suspension-feeding species are likely subjected to similar impacts, which may act synergistically with climate-driven events primarily responsible for mass mortalities.