Temporal stability in beta diversity does not guarantee surrogacy or compositional stability in a micro-phytoplankton metacommunity

IF 1.2 4区环境科学与生态学 Q4 LIMNOLOGY

Limnetica Pub Date : 2023-01-01 DOI:10.23818/limn.42.10

Marina Ferraz Sampaio, P. C. Ferreira, T. A. Veiga Ludwig, A. Padial

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引用次数: 2

Abstract

Temporal stability in beta diversity does not guarantee surrogacy or compositional stability in a micro-phytoplankton meta¬community. In this study, we evaluated phytoplankton community organization (i.e., microalgae filtered in 20 μm mesh-sized plankton net) in a highly dynamic subtropical tidal river over three years. Specifically, we assessed temporal stability in the spatial organization of phytoplankton, the diatoms’ efficiency as an indicator (surrogate group) of ecological patterns of other phytoplankton groups, the temporal variation in species composition, and the beta diversity of a metacommunity. We performed six sampling occasions at the end of the summers and winters from 2017 to 2019 at 16 sampling points comprising a strong en¬vironmental gradient in the Guaraguaçu River, South Brazil. We tested for correlations of community structures from different periods and for correlations between diatoms species and those from other phytoplankton groups using Mantel tests. Species compositions were compared among periods using a permutational multivariate analysis of variance, and temporal variation in metacommunity beta diversity was evaluated using null models. There was temporal stability in the spatial dissimilarities of communities. Diatoms were poorly correlated with the other phytoplankton groups. The temporal stability in spatial structure, a facet of beta diversity, was in line with the temporal stability in compositional variation – a measurement of metacommuni¬ty beta diversity. Our results also showed that such stability was not static, since community compositions varied over time, mainly between seasons. We conclude that even in a highly dynamic tidal river, the temporal stability of spatial organization may indicate that the spatial gradient is so strong that it maintains spatial structuring over time. Such patterns were maintained even with the dynamic species changes over seasons. The fact that different phytoplankton groups do not respond similarly to the spatial gradient reinforces that microalgae should be analyzed separately in ecological studies, and long-term monitoring should consider different algal groups for a complete assessment of ecological patterns.

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β多样性的时间稳定性不能保证微型浮游植物元群落的替代性或组成稳定性

β多样性的时间稳定性并不能保证微型浮游植物元群落的替代性或组成稳定性。在这项研究中，我们在三年内评估了一条高度动态的亚热带潮汐河中的浮游植物群落组织（即在20μm网眼大小的浮游生物网中过滤的微藻）。具体而言，我们评估了浮游植物空间组织的时间稳定性、硅藻作为其他浮游植物群落生态模式指标（替代组）的效率、物种组成的时间变化以及元群落的β多样性。2017年至2019年，我们在巴西南部Guaraguaçu河的16个采样点进行了六次采样，这些采样点包括一个强大的环境梯度。我们使用Mantel测试测试了不同时期群落结构的相关性，以及硅藻物种与其他浮游植物类群之间的相关性。使用排列多变量方差分析比较不同时期的物种组成，并使用零模型评估元群落β多样性的时间变化。群落空间差异具有时间稳定性。硅藻和其他浮游植物群的相关性很差。空间结构的时间稳定性是β多样性的一个方面，与成分变化的时间稳定性一致——成分变化是对元群落β多样性进行测量。我们的研究结果还表明，这种稳定性不是静态的，因为群落组成随着时间的推移而变化，主要是在季节之间。我们得出的结论是，即使在高度动态的潮汐河中，空间组织的时间稳定性也可能表明空间梯度非常强，随着时间的推移，它保持着空间结构。即使物种随季节动态变化，这种模式也得以维持。不同的浮游植物群体对空间梯度的反应不同，这一事实强化了在生态研究中应单独分析微藻，长期监测应考虑不同的藻类群体，以全面评估生态模式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Limnetica LIMNOLOGY-MARINE & FRESHWATER BIOLOGY

CiteScore

3.70

自引率

7.10%

发文量

审稿时长

>12 weeks

期刊介绍： Limnetica publishes original research articles on the ecology of inland waters. The scope of Limnetica includes the ecology of rivers, lakes, reservoirs, coastal lagoons and wetlands, as well as biogeochemistry, paleolimnology, development of new methodologies, taxonomy, biogeography and any aspect of theoretical and applied continental aquatic ecology such as management and conservation, impact assessment, ecotoxicology and pollution. Limnetica will accept for its publication scientific articles presenting advances in knowledge or technological development, as well as as papers derived from new practical approaches on the topics covered by the journal.