Functional diversity and resilience of bivalves after the Permian-Triassic mass extinction

IF 2.6 2区 地球科学 Q2 GEOGRAPHY, PHYSICAL
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Abstract

The Permian-Triassic mass extinction was the largest extinction event in the Phanerozoic eon, with profound taxonomic and ecological effects on the ecosystem function. Functional diversity, a facet of biodiversity, could reflect the ecosystem function and stability. Although previous studies have shown that the functional richness of global marine organisms was decoupled from their taxonomic diversity during the mass extinctions, the evolution of functional diversity during the Permian-Triassic mass extinction and its aftermath is still under debate. The ecologically diverse clade bivalves may be more representative for understanding the evolution of functional diversity. To investigate the evolutionary dynamics of the functional diversity of bivalves, a global bivalve dataset of 8929 occurrences from the latest Permian to the Late Triassic was constructed. Functional richness, functional evenness, and functional redundancy were calculated to reflect the functional diversity in this study. Our results showed that the functional richness of bivalves was slightly affected by the Permian-Triassic mass extinction, decoupled from the significant decrease in taxonomic diversity. Meanwhile, a decrease in functional redundancy and an increase in functional evenness were observed after the mass extinction. In addition, bivalves showed high resilience to the mass extinction by maintaining the ecospace and reducing the functional redundancy. The high taxonomic diversity, high functional richness, high functional redundancy and relatively higher proportion of infaunal bivalves during the Late Triassic indicate that the Mesozoic marine revolution was already underway.
二叠纪-三叠纪大灭绝后双壳类动物的功能多样性和恢复力
二叠纪-三叠纪生物大灭绝是新生代最大的生物灭绝事件,对生物分类学和生态系统功能产生了深远的影响。功能多样性作为生物多样性的一个方面,可以反映生态系统的功能和稳定性。尽管以往的研究表明,在生物大灭绝期间,全球海洋生物的功能丰富性与其分类学多样性脱钩,但二叠纪-三叠纪生物大灭绝期间及其后的功能多样性演化仍存在争议。在了解功能多样性的演化过程中,具有生态多样性的双壳类可能更具代表性。为了研究双壳类功能多样性的演化动态,我们构建了一个从二叠纪晚期到三叠纪晚期的全球双壳类数据集。本研究计算了功能丰富度、功能均匀度和功能冗余度,以反映功能多样性。结果表明,双壳类的功能丰富度受二叠纪-三叠纪大灭绝的影响较小,与分类多样性的显著下降无关。同时,大灭绝后功能冗余度下降,功能均匀度上升。此外,双壳类动物通过维持生态空间和减少功能冗余,在大灭绝中表现出较高的恢复能力。晚三叠世高分类多样性、高功能丰富度、高功能冗余度和相对较高的底栖双壳类比例表明,中生代海洋革命已经开始。
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来源期刊
CiteScore
5.90
自引率
10.00%
发文量
398
审稿时长
3.8 months
期刊介绍: Palaeogeography, Palaeoclimatology, Palaeoecology is an international medium for the publication of high quality and multidisciplinary, original studies and comprehensive reviews in the field of palaeo-environmental geology. The journal aims at bringing together data with global implications from research in the many different disciplines involved in palaeo-environmental investigations. By cutting across the boundaries of established sciences, it provides an interdisciplinary forum where issues of general interest can be discussed.
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