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Association of microplastic pollution with coral resilience in the presence of sea surface temperature anomalies
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Scientists found that microplastic pollution—tiny plastic bits now found throughout our oceans—makes coral reefs significantly less able to bounce back from ocean warming, with some reefs near Madagascar and the Solomon Islands losing resilience by more than 100%. This matters beyond ocean health: coral reefs protect coastlines, support fisheries that feed billions of people, and their decline signals just how deeply plastic pollution has infiltrated marine ecosystems humans depend on for food and livelihoods.
Coral resilience is a critical determinant of the capacities of reef ecosystems to withstand climate change and environmental pollution; however, its global distribution patterns remain elusive, and its key associated factors remain controversial. In this study, we analyzed 3590 independent coral resilience cases and determined that microplastics (MPs) have potential interactions and cascading effects with the sea surface temperature anomaly (SSTA) frequency. The significant negative associations between MPs and resilience were determined under a sensitive, optimal SSTA frequency. Without considering microplastics, global coral resilience would increase by 15.36%. Moreover, the resilience of coral reefs in the Indian and Pacific Oceans (e.g., near Madagascar and the Solomon Islands) could be decreased by a maximum of 127.82% via the slight covariation of microplastics and external pressure changes. To generate systemic and professional knowledge for environmental managers and scholars, reveal hidden information about coral resilience and clarify the role of MPs, a large language model named Coral Bot (http://101.201.44.218:8080) was developed by integrating 2087 studies. Even users without specialized knowledge can quickly understand the complex relationships among coral resilience, environmental pollution and climate change through Coral Bot. This work increases the accuracy of the coral resilience assessments in the presence of temperature anomalies and microplastic pollution, improving reef management conservation policies, even for nonspecialists.
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Impact of micro-and nanoplastic contamination on reef-building corals
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Researchers exposed two tropical coral species to micro- and nanoplastics of varying polymer types and assessed bleaching, symbiont loss, and tissue damage. Both species showed stress responses including reduced photosynthetic efficiency and partial bleaching, with effects varying by plastic type and size, suggesting reef-building corals are vulnerable to plastic pollution.
Physical and cellular impact of environmentally relevant microplastic exposure on thermally challenged Pocillopora damicornis (Cnidaria, Scleractinia)
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Corals exposed to microplastics at levels currently found in the ocean showed more cellular damage when also stressed by warm water temperatures. The microplastics triggered inflammation-like responses and slowed down tissue repair in the corals. This matters because coral reefs are already under severe pressure from climate change, and microplastic pollution appears to make their situation worse.
Interactive effects of microplastic pollution and heat stress on reef-building corals
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Researchers tested the combined effects of microplastic pollution and heat stress on five reef-building coral species in controlled laboratory experiments. They found that while heat stress caused significant bleaching, tissue death, and reduced photosynthetic efficiency, microplastics alone had only minor effects at ambient temperatures, suggesting that climate change remains a far greater threat to coral reefs than microplastic pollution.
Physiological and biochemical effects of microplastics on corals: Environmental and ecological impacts and mitigation strategies and policy options
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Researchers review how microplastic ingestion disrupts coral physiology through oxidative stress, impaired larval settlement, reduced feeding efficiency, and vectoring of co-contaminants including heavy metals and persistent organic pollutants, with microplastic-induced bleaching linked to destabilization of the anthozoan-algae symbiosis.
Interactive effects of microplastic pollution and heat stress on reef-building corals
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This study tested the combined effects of microplastic exposure and heat stress on reef-building corals, finding that the combination caused more damage than either stressor alone. As climate change raises ocean temperatures, the simultaneous pressure from plastic pollution may accelerate coral reef decline.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.