Recent rapid changes in climate and environmental conditions have significantly impacted coastal ecosystem functioning. However, the complex interplay between global and local effects makes it challenging to pinpoint the primary drivers. In a multi‐ecosystem study, we analyzed pluri‐decadal trends of bivalve‐δ13C as recorder of global environmental changes. These trends were correlated with large‐scale natural and anthropogenic climate proxies to identify whether coastal biota responded to global effects. Our findings revealed decreasing bivalve‐δ13C trends in all sea regions, mainly linked with increased temperature and atmospheric‐CO2 concentrations, the later generating a decrease in atmospheric‐CO2 δ13C values (Suess effect) because of fossil‐fuel burning. After removing the Suess effect from bivalve‐δ13C trends, ongoing global climate variability continues to affect most ecosystems, possibly intensified by combined, interacting regional or local effects. These results highlight the need to consider large‐scale effects to fully understand ecosystem and food web responses to the multiple effects of global change.

中文翻译：

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双壳类组织作为沿海地区数十年全球人为和气候介导变化的记录者

最近气候和环境条件的快速变化严重影响了沿海生态系统的功能。然而，全球影响和局部影响之间复杂的相互作用使得确定主要驱动因素具有挑战性。在一项多生态系统研究中，我们分析了双壳类δ的多十年趋势13C作为全球环境变化的记录者。这些趋势与大规模自然和人为气候代理相关，以确定沿海生物群是否对全球影响做出反应。我们的研究结果显示双壳类δδ减少13所有海域的碳浓度趋势，主要与温度升高和大气二氧化碳浓度升高有关2浓度，后者导致大气中二氧化碳的减少2δ13由于化石燃料燃烧而产生的 C 值（Suess 效应）。消除双壳类-δ 的 Suess 效应后13根据 C 趋势，持续的全球气候变化继续影响大多数生态系统，并可能因区域或地方的综合、相互作用的影响而加剧。这些结果强调需要考虑大规模影响，以充分了解生态系统和食物网对全球变化多重影响的反应。