Calcium carbonate content for two morphotypes of an indicator charophyte species across a depth and light gradient in a mesotrophic lake

IF 3.5 2区环境科学与生态学 Q1 BIODIVERSITY CONSERVATION

Global Ecology and Conservation Pub Date : 2025-03-15 DOI:10.1016/j.gecco.2025.e03546

Michał Brzozowski , Mariusz Pełechaty

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引用次数: 0

Abstract

This study investigates the role of light availability and depth for calcium carbonate (CaCO₃) content in two distinct morphotypes of Lychnothamnus barbatus in Lake Kuźnickie, a mesotrophic lake in Western Poland. Lychnothamnus barbatus is a rare charophyte with high ecological and paleoecological significance, exhibiting phenotypic plasticity to adapt to environmental conditions. Fieldwork conducted in August 2019 encompassed sampling across a depth gradient (0.5–6.5 m), with measurements of photosynthetically active radiation (PAR), water chemistry, and L. barbatus biomass. Laboratory analyses included loss-on-ignition (LOI) to quantify organic matter and CaCO₃ content in dry plant material. Results revealed significant differences in CaCO₃ encrustation efficiency between morphotypes, with the elongated, deep-water morphotype displaying lower encrustation rates than shallow water morphotype. These findings underscore the utility of L. barbatus as a bioindicator for both contemporary and historical aquatic ecosystems, offering insights into carbonate precipitation in a model temperate mesotrophic lake hosting one of the biggest population of the globally rare charophyte.

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本研究调查了波兰西部中营养湖库兹尼基湖（Lake Kuźnickie）中两种不同形态的鲃鱼（Lychnothamnus barbatus）的碳酸钙（CaCO₃）含量受光照和深度影响的情况。Lychnothamnus barbatus是一种罕见的叶绿藻，具有很高的生态学和古生态学意义，表现出适应环境条件的表型可塑性。2019 年 8 月开展的野外工作包括在深度梯度（0.5-6.5 米）上取样，测量光合有效辐射（PAR）、水化学和鲃的生物量。实验室分析包括燃烧损失率（LOI），以量化干植物材料中的有机物和 CaCO₃含量。结果表明，不同形态之间的 CaCO₃ 结壳效率存在明显差异，细长的深水形态的结壳率低于浅水形态。这些发现强调了鲃属植物作为当代和历史水生生态系统生物指标的实用性，为了解全球罕见的鲃属植物最大种群之一所在的温带中营养模型湖的碳酸盐沉淀情况提供了见解。

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来源期刊

Global Ecology and Conservation Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics

CiteScore

8.10

自引率

5.00%

发文量

346

审稿时长

83 days

期刊介绍： Global Ecology and Conservation is a peer-reviewed, open-access journal covering all sub-disciplines of ecological and conservation science: from theory to practice, from molecules to ecosystems, from regional to global. The fields covered include: organismal, population, community, and ecosystem ecology; physiological, evolutionary, and behavioral ecology; and conservation science.