Microprotozooplankton as eutrophication bioindicator for tropical coastal lagoons

IF 1.8 4区环境科学与生态学 Q2 FISHERIES Marine and Freshwater Research Pub Date : 2024-07-04 DOI:10.1071/mf23122

Gustavo Martins Rocha, Jordana de Carvalho e Féres, Gustavo Meira Kandler, Renata Caiado Cagnin, César Alexandro da Silva, Sarah Karoline Rodrigues, Bethânia Dal’Col Lehrback, Kamila Cezar Gramlich, Renato Rodrigues Neto, Fabian Sá, Luiz Fernando Loureiro Fernandes

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Abstract

Context and aims

A reliable bioindicator index of eutrophication is still lacking for monitoring zooplankton in saline, coastal lagoons. We aimed to establish plankton bioindicators of eutrophication that are not affected by salinity variation, which is essential for environmental monitoring of coastal lagoons.

Methods

Sampling was conducted for microprotozooplankton, chlorophyll-a, nutrients and sterols in eight tropical coastal lagoons with different saline and nutrient concentrations. A testate amoeba and rotifer bioindication index of eutrophication (T&R index) was proposed after establishing a list of indicator species on the basis of five statistical criteria and one bibliographic criterion.

Key results

Selected species, based on the six criteria, were Arcella hemisphaerica, Brachionus plicatilis, Galeripora (Arcella) discoides, Netzelia corona, Lecane closterocerca, Lepadela patella and Testudinela patina. Biodiversity measures, traditionally used in biomonitoring, varied negatively with salinity (r = −0.60 for Margalef richness and −0.59 for Shannon diversity) and were not correlated with nutrient concentrations. Conversely, the T&R index showed no correlation with salinity (r = 0.002) and was positively correlated with the trophic-state index (TSI) (r = 0.62).

Conclusions and implications

Our results showed that specific patterns of indicator microprotozooplankton species can effectively diagnose organic pollution in coastal lagoons and their use is a more suitable approach than is the use of community indicators such as richness, evenness and diversity, traditionally used for that task.

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作为热带沿海泻湖富营养化生物指标的微浮游动物

背景和目的在监测盐碱化沿海泻湖浮游动物时，仍然缺乏可靠的富营养化生物指标指数。我们的目标是建立不受盐度变化影响的浮游生物富营养化生物指标，这对沿海泻湖的环境监测至关重要。方法在八个具有不同盐度和营养浓度的热带沿海泻湖中对微小浮游动物、叶绿素-a、营养物质和固醇进行了采样。根据五项统计标准和一项文献标准确定了指示物种清单，然后提出了富营养化的睾丸变形虫和轮虫生物指示指数（T&R 指数）。主要结果根据六项标准选出的物种为：Arcella hemisphaerica、Brachionus plicatilis、Galeripora (Arcella) discoides、Netzelia corona、Lecane closterocerca、Lepadela patella 和 Testudinela patina。传统上用于生物监测的生物多样性指标与盐度呈负相关（Margalef 丰富度的 r = -0.60，香农多样性的 r = -0.59），与营养浓度无关。相反，T&R 指数与盐度无相关性（r = 0.002），与营养状态指数（TSI）呈正相关（r = 0.62）。结论和启示我们的研究结果表明，指示性微小浮游动物物种的特定模式可有效诊断沿海泻湖的有机污染，与传统上使用的丰富度、均匀度和多样性等群落指标相比，使用指示性微小浮游动物物种的特定模式是一种更合适的方法。

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

Marine and Freshwater Research 环境科学-海洋学

CiteScore

4.60

自引率

5.60%

发文量

审稿时长

3.8 months

期刊介绍： Marine and Freshwater Research is an international and interdisciplinary journal publishing contributions on all aquatic environments. The journal’s content addresses broad conceptual questions and investigations about the ecology and management of aquatic environments. Environments range from groundwaters, wetlands and streams to estuaries, rocky shores, reefs and the open ocean. Subject areas include, but are not limited to: aquatic ecosystem processes, such as nutrient cycling; biology; ecology; biogeochemistry; biogeography and phylogeography; hydrology; limnology; oceanography; toxicology; conservation and management; and ecosystem services. Contributions that are interdisciplinary and of wide interest and consider the social-ecological and institutional issues associated with managing marine and freshwater ecosystems are welcomed. Marine and Freshwater Research is a valuable resource for researchers in industry and academia, resource managers, environmental consultants, students and amateurs who are interested in any aspect of the aquatic sciences. Marine and Freshwater Research is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.