气候变化领域集成服务门户(CCPortal): Physical and cellular impact of environmentally relevant microplastic exposure on thermally challenged Pocillopora damicornis (Cnidaria, Scleractinia)

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DOI	10.1016/j.scitotenv.2024.170651
	Physical and cellular impact of environmentally relevant microplastic exposure on thermally challenged Pocillopora damicornis (Cnidaria, Scleractinia)
	Isa, Valerio; Seveso, Davide; Diamante, Luca; Montalbetti, Enrico; Montano, Simone; Gobbato, Jacopo; Lavorano, Silvia; Galli, Paolo; Louis, Yohan Didier
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	918
卷号	918
英文摘要	Microplastic pollution is an increasing threat to coral reefs, which are already strongly challenged by climate change -related heat stress. Although it is known that scleractinian corals can ingest microplastic, little is known about their egestion and how microplastic exposure may impair corals at physiological and cellular levels. In addition, the effects of microplastic pollution at current environmental concentration have been little investigated to date, particularly in corals already impacted by heat stress. In this study, the combined effects of these environmental threats on Pocillopora damicornis were investigated from a physical and cellular perspective. Colonies were exposed to three concentrations of polyethylene microplastic beads (no microplastic beads: [No MP], 1 mg/L: [Low MP]; 10 mg/L: [High MP]), and two different temperatures (25 degrees C and 30 degrees C) for 72 h. No visual signs of stress in corals, such as abnormal mucus production and polyp extroflection, were recorded. At [Low MP], beads adhered to colonies were ingested but were also egested. Moreover, thermally stressed colonies showed a lower adhesion and higher egestion of microplastic beads. Coral bleaching was observed with an increase in temperature and microplastic bead concentration, as indicated by a general decrease in chlorophyll concentration and Symbiodiniaceae density. An increase in lipid peroxidation was measured in colonies exposed to [Low MP] and [High MP] and an up -regulation of stress response gene hsp70 was observed due to the synergistic interaction of both stressors. Overall, our findings showed that heat stress still represents the main threat to P. damicornis, while the effect of microplastics on coral health and physiology may be minor, especially at control temperature. However, microplastics could exacerbate the effect of thermal stress on cellular homeostasis, even at [Low MP]. While reducing ocean warming is critical for preserving coral reefs, effective management of emerging threats like microplastic pollution is equally essential.
英文关键词	Microplastic; Thermal stress; Coral bleaching; Oxidative stress; Gene expression; Pocillopora damicornis
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001184386700001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303980
作者单位	University of Milano-Bicocca; University of Dubai
推荐引用方式 GB/T 7714	Isa, Valerio,Seveso, Davide,Diamante, Luca,et al. Physical and cellular impact of environmentally relevant microplastic exposure on thermally challenged Pocillopora damicornis (Cnidaria, Scleractinia)[J],2024,918.
APA	Isa, Valerio.,Seveso, Davide.,Diamante, Luca.,Montalbetti, Enrico.,Montano, Simone.,...&Louis, Yohan Didier.(2024).Physical and cellular impact of environmentally relevant microplastic exposure on thermally challenged Pocillopora damicornis (Cnidaria, Scleractinia).SCIENCE OF THE TOTAL ENVIRONMENT,918.
MLA	Isa, Valerio,et al."Physical and cellular impact of environmentally relevant microplastic exposure on thermally challenged Pocillopora damicornis (Cnidaria, Scleractinia)".SCIENCE OF THE TOTAL ENVIRONMENT 918(2024).