Bivalve tissues as a recorder of multidecadal global anthropogenic and climate-mediated change in coastal areas

IF 5.1 2区 地球科学 Q1 LIMNOLOGY
Camilla Liénart, Alan Fournioux, Andrius Garbaras, Arnaud Lheureux, Hugues Blanchet, Nicolas Briant, Stanislas F. Dubois, Aline Gangnery, Anne Grouhel Pellouin, Pauline Le Monier, Xavier De Montaudouin, Nicolas Savoye
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Abstract

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.

Abstract Image

双壳类动物组织是全球沿海地区多年代人为变化和气候介导变化的记录器
最近气候和环境条件的迅速变化对沿岸生态系统的功能产生了重大影响。然而,由于全球和地方影响之间复杂的相互作用,确定主要驱动因素具有挑战性。在一项多生态系统研究中,我们分析了作为全球环境变化记录者的双壳类动物-δ13C 的十年变化趋势。这些趋势与大尺度自然和人为气候代用指标相关联,以确定沿海生物群是否对全球影响做出了反应。我们的研究结果表明,所有海区的双壳类动物δ13C 都呈下降趋势,这主要与温度和大气中二氧化碳浓度的增加有关,后者由于化石燃料的燃烧而导致大气中二氧化碳δ13C 值的下降(苏斯效应)。从双壳类动物的δ13C 趋势中剔除苏斯效应后,持续的全球气候变异性继续影响着大多数生态系统,并可能因区域或地方效应的综合、相互作用而加剧。这些结果凸显了考虑大规模效应的必要性,以充分了解生态系统和食物网对全球变化多重效应的反应。
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来源期刊
CiteScore
10.00
自引率
3.80%
发文量
63
审稿时长
25 weeks
期刊介绍: Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.
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