Brachiopods as archives of intrannual, annual, and interannual environmental variations

IF 5.1 2区地球科学 Q1 LIMNOLOGY

Limnology and Oceanography Letters Pub Date : 2025-04-16 DOI:10.1002/lol2.70004

G. Crippa, H. Jurikova, M. J. Leng, M. Zanchi, E. M. Harper, J. W. B. Rae, K. Savickaite, M. Viaretti, L. Angiolini

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引用次数: 0

Abstract

Brachiopods have been employed for environmental and climatic reconstructions in the near and geological past. Traditionally, one datapoint is obtained per shell, providing time‐averaged bulk signals. However, brachiopods also have the potential to provide time‐resolved information on (sub)annual timescales, but this has been understudied due to difficulties in accounting for brachiopod shell growth. We investigated the distribution of δ18O, δ13C and Element/Ca along growth profiles of three Recent terebratulides from temperate and polar latitudes. We employed a novel approach using the Brody–Bertalanffy equation to transform shell distances into ages, permitting the study of periodicity in the measured signatures. We show that, superimposed on ontogenetic trends, faster‐growing temperate species record annual and intrannual changes at collection sites, whereas slower‐growing Antarctic species are also controlled by endogenous cycles. δ18O profiles reflect annual and intrannual variations in midlatitudes and interannual variations at high latitudes. δ13C and Element/Ca are additionally influenced by vital effects.

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腕足动物一直被用于近代和地质过去的环境和气候重建。传统上，腕足类动物的每个壳都有一个数据点，提供时间平均的大量信号。然而，腕足动物也有可能提供（亚）年时间尺度上的时间分辨信息，但由于腕足动物壳的生长难以计算，这方面的研究一直不足。我们研究了温带和极地纬度地区三种新近腕足动物生长剖面上的δ18O、δ13C 和元素/Ca 分布情况。我们采用了布罗迪-贝塔朗菲方程（Brody-Bertalanffy equation）这一新颖的方法，将贝壳距离转化为年龄，从而对测量特征的周期性进行了研究。我们发现，与个体发育趋势相叠加，生长较快的温带物种在采集地点记录了年度和年内变化，而生长较慢的南极物种也受内生周期的控制。δ18O剖面反映了中纬度地区的年变化和年内变化以及高纬度地区的年际变化。δ13C和元素/Ca还受到生命效应的影响。

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来源期刊

Limnology and Oceanography Letters Multiple-

CiteScore

10.00

自引率

3.80%

发文量

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.