Interspecies differences and lake-specificity in the δ13C and δ18O signatures of charophyte carbonate encrustations

IF 2.8 2区生物学 Q2 ECOLOGY Freshwater Biology Pub Date : 2024-08-10 DOI:10.1111/fwb.14315

Mariusz Pełechaty, Eugeniusz Pronin, Andrzej Pukacz, Karina Apolinarska

引用次数: 0

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叶绿体碳酸盐结壳的δ13C和δ18O特征的种间差异和湖泊特异性

本研究确定了现存叶绿体碳酸盐的δ13C和δ18O特征（δ13CCARB和δ18OCARB）与水中溶解无机碳的δ13C和δ18O（δ13CDIC和δ18OWATER）之间的关系，以及叶绿体床的结构和环境水的物理化学性质。研究人员在中欧四个以叶绿藻为主的湖泊（Chara-lakes）中对四个形态各异的叶绿藻物种（Nitellopsis obtusa、Chara tomentosa、Chara rudis、Chara contraria）进行了研究。这些物种广泛分布在富含钙质的淡水湖泊中，在湖泊中形成了广泛的水下床，促进了钙质沉积物的沉积，因此该研究具有代表性。每月（2008 年 6 月至 9 月）在永久性研究地点对叶绿藻及其上层水体进行采样。对所有被研究的叶绿体而言，包壳的δ13C和δ18O值的变化都大于环境和浮游水体的变化。除 N. obtusa 和 C. tomentosa 外，其他物种的 δ13CCARB 值差异显著。与水中的 DIC 相比，包壳富含 13C。与 N. obtusa 和 C. contraria 相比，Chara tomentosa 结壳中的 18O 含量明显减少。与 Chara 种类相反，N. obtusa 包壳与周围水体相比富含 18O。考虑到 δ13CCARB 与 δ13CDIC 值的比较，只有细长的物种（即 N. obtusa 和 C. contraria）析出的包壳接近与水 DIC 的同位素平衡。通过冗余分析，δ13CCARB 值与δ13CDIC 和δ18OWATER 值以及植物栖息水体的百分比呈正相关。地点深度、水矿化度、碱度和肥力与 δ13CCARB 值成反比。我们推测，叶绿体包壳的稳定 C 和 O 同位素组成具有湖泊特异性而非物种特异性，叶绿体碳酸盐的同位素特征代表了整个湖泊的表层水，而不仅仅是植被覆盖的沿岸带。此外，大体积沉积物的同位素信号可以提供与特定物种同位素值同样有用的环境信息。

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来源期刊

Freshwater Biology 生物-海洋与淡水生物学

CiteScore

5.90

自引率

3.70%

发文量

162

审稿时长

2 months

期刊介绍： Freshwater Biology publishes papers on all aspects of the ecology of inland waters, including rivers and lakes, ground waters, flood plains and other freshwater wetlands. We include studies of micro-organisms, algae, macrophytes, invertebrates, fish and other vertebrates, as well as those concerning whole systems and related physical and chemical aspects of the environment, provided that they have clear biological relevance. Studies may focus at any level in the ecological hierarchy from physiological ecology and animal behaviour, through population dynamics and evolutionary genetics, to community interactions, biogeography and ecosystem functioning. They may also be at any scale: from microhabitat to landscape, and continental to global. Preference is given to research, whether meta-analytical, experimental, theoretical or descriptive, highlighting causal (ecological) mechanisms from which clearly stated hypotheses are derived. Manuscripts with an experimental or conceptual flavour are particularly welcome, as are those or which integrate laboratory and field work, and studies from less well researched areas of the world. Priority is given to submissions that are likely to interest a wide range of readers. We encourage submission of papers well grounded in ecological theory that deal with issues related to the conservation and management of inland waters. Papers interpreting fundamental research in a way that makes clear its applied, strategic or socio-economic relevance are also welcome. Review articles (FRESHWATER BIOLOGY REVIEWS) and discussion papers (OPINION) are also invited: these enable authors to publish high-quality material outside the constraints of standard research papers.