Effects of water temperature over benthic diatom communities: insights from thermal springs

IF 1.7 4区生物学 Q2 PLANT SCIENCES Plant Ecology & Diversity Pub Date : 2020-07-03 DOI:10.1080/17550874.2020.1762133

C. Delgado, M. Feio, I. Pardo, S. Almeida

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引用次数: 11

Abstract

ABSTRACT Background Thermal springs provide extreme ecological conditions for aquatic communities owing to their high water temperature and particular water chemistry. The thermal springs and their connected watercourses provide a thermal laboratory by offering a wide range of temperatures within short spatial distances. To date, the information on how the biodiversity of these springs is related to water temperature or chemistry is limited. Aims We studied the effects of water temperature on diatom community diversity and structure with the objective to supply a baseline for the conservation of thermal springs. Methods We sampled 31 sites of 16 thermal springs across a temperature gradient between 18.5 and 63.0°C in the north-western Iberian Peninsula and related diatom richness and structure to water temperature. Results A total of 124 diatom species were identified in springs with water temperature between 18.5 and 42.4°C. Community diversity decreased with increasing temperature and the highest species richness was found at temperatures ≤ 25°C. Three diatom assemblages were defined, discriminated by temperature ranges (≤25°C, 25–35°C and ≥35°C). Conclusions Water temperature was found to be an important driver of diatom community composition in the thermal systems studied. Temperature affects diatom distribution decreasing diversity with the increase in global water temperature.

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水温对底栖硅藻群落的影响:来自温泉的见解

摘要背景温泉因其较高的水温和特殊的水化学特性，为水生生物群落提供了极端的生态条件。温泉及其相连的水道通过在短空间距离内提供广泛的温度范围，提供了一个热实验室。迄今为止，关于这些温泉的生物多样性与水温或化学成分的关系的信息是有限的。目的研究水温对硅藻群落多样性和结构的影响，为温泉资源保护提供依据。方法在伊比利亚半岛西北部选取温度梯度为18.5 ~ 63.0°C的16个温泉的31个取样点，分析硅藻丰富度和结构与水温的关系。结果在水温为18.5 ~ 42.4℃的温泉中，共鉴定出124种硅藻。群落多样性随温度升高而降低，物种丰富度在温度≤25°C时最高。根据温度范围(≤25°C, 25 - 35°C和≥35°C)，定义了三种硅藻组合。结论在热系统研究中，水温是硅藻群落组成的重要驱动因素。温度影响硅藻的分布，随着全球水温的升高，硅藻的多样性逐渐减少。

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来源期刊

Plant Ecology & Diversity PLANT SCIENCES-

CiteScore

3.30

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Plant Ecology and Diversity is an international journal for communicating results and novel ideas in plant science, in print and on-line, six times a year. All areas of plant biology relating to ecology, evolution and diversity are of interest, including those which explicitly deal with today''s highly topical themes, such as biodiversity, conservation and global change. We consider submissions that address fundamental questions which are pertinent to contemporary plant science. Articles concerning extreme environments world-wide are particularly welcome. Plant Ecology and Diversity considers for publication original research articles, short communications, reviews, and scientific correspondence that explore thought-provoking ideas. To aid redressing ‘publication bias’ the journal is unique in reporting, in the form of short communications, ‘negative results’ and ‘repeat experiments’ that test ecological theories experimentally, in theoretically flawless and methodologically sound papers. Research reviews and method papers, are also encouraged. Plant Ecology & Diversity publishes high-quality and topical research that demonstrates solid scholarship. As such, the journal does not publish purely descriptive papers. Submissions are required to focus on research topics that are broad in their scope and thus provide new insights and contribute to theory. The original research should address clear hypotheses that test theory or questions and offer new insights on topics of interest to an international readership.