Structure and dynamics of mollusk communities from intermittent rivers in Brazilian semiarid region

IF 1.7 4区环境科学与生态学 Q3 ECOLOGY

Aquatic Ecology Pub Date : 2024-09-14 DOI:10.1007/s10452-024-10133-2

Manuella Feitosa Leal, Miodeli Nogueira Júnior, Karina Ketelen Silva Dantas, Edson Lourenço Silva, Tamaris Gimenez Pinheiro, Ana Carolina Figueiredo Lacerda

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Abstract

Research conducted in intermittent rivers located in semiarid regions has revealed that the hydroperiod significantly affects the composition and dynamics of limnic communities. In our study, we examined the impact of key factors associated with abiotic heterogeneity resulting from irregular hydroperiods and the conservation status of two intermittent rivers in the semiarid region of Brazil on the structure and dynamics of limnic mollusk communities. For this, we collected material monthly throughout two years on the Itaim and Guaribas rivers, in Piauí semiarid region. We employed Two-Way Analysis of Variance (ANOVA) and PERMANOVA to assess variations in community structure based on mollusk species richness and abundance across the different rivers and seasons. Additionally, we employed Redundancy Analysis (RDA) to examine the influence of explanatory variables on community structure. Our findings demonstrate that in intermittent rivers within the Brazilian semiarid region, multiple factors contribute to the shaping of limnic communities, with anthropogenic disturbances playing a predominant role, challenging previous studies that have primarily emphasized the influence of hydroperiod on such communities.

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巴西半干旱地区间歇性河流软体动物群落的结构与动态

对位于半干旱地区的间歇性河流进行的研究表明，水文周期对湖泊群落的组成和动态有重大影响。在我们的研究中，我们考察了巴西半干旱地区两条间歇性河流因水文周期不规则造成的非生物异质性相关关键因素以及保护状况对软体动物群落结构和动态的影响。为此，我们在皮奥伊半干旱地区的伊泰姆河和瓜里巴斯河收集了两年的每月材料。我们采用了双向方差分析（ANOVA）和 PERMANOVA 方法，根据不同河流和季节的软体动物物种丰富度和丰度来评估群落结构的变化。此外，我们还采用了冗余分析（RDA）来研究解释变量对群落结构的影响。我们的研究结果表明，在巴西半干旱地区的间歇性河流中，多种因素促成了湖泊群落的形成，其中人为干扰起了主要作用，这对之前主要强调水文周期对此类群落影响的研究提出了挑战。

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来源期刊

Aquatic Ecology 环境科学-海洋与淡水生物学

CiteScore

3.90

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Aquatic Ecology publishes timely, peer-reviewed original papers relating to the ecology of fresh, brackish, estuarine and marine environments. Papers on fundamental and applied novel research in both the field and the laboratory, including descriptive or experimental studies, will be included in the journal. Preference will be given to studies that address timely and current topics and are integrative and critical in approach. We discourage papers that describe presence and abundance of aquatic biota in local habitats as well as papers that are pure systematic. The journal provides a forum for the aquatic ecologist - limnologist and oceanologist alike- to discuss ecological issues related to processes and structures at different integration levels from individuals to populations, to communities and entire ecosystems.