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<p>Despite the widespread distribution of the genus <i>Vaucheria</i> (Xanthophyceae), our knowledge of the genus and its species remains limited, with many research gaps yet to be filled. This study aimed to investigate distribution, ecological preferences and co-occurring macroflora of <i>Vaucheria</i> spp. in Serbian lotic ecosystems and to evaluate its potential application in bioindication. Between March 2017 and July 2025, field surveys were conducted at 525 sites across more than 200 rivers, streams, springs and waterfalls. A total of 121 <i>Vaucheria</i> spp. samples were collected from 90 sites. Most samples were sterile, with reproductive organs found in only three samples, while in seven additional samples they developed after ex situ cultivation. Two species were identified based on reproductive structures: <i>V. bursata</i>, recorded at new sites, and <i>V. geminata</i>, reported for the first time in Serbia’s algal flora. Fifty-eight macroflora species were observed in association with <i>Vaucheria</i> spp., including 46 macroalgal aggregations and 12 macrophytes. <i>Vaucheria</i> spp. occurred under a wide range of environmental conditions, with variable light, temperature, flow regimes and substrate types. Multivariate analyses showed that it reaches higher coverage in waters with elevated nitrate concentrations, suggesting its possible use as an indicator of nitrate levels in Serbian lotic ecosystems. Cluster analysis also showed that the co-occurring macroalgal and macrophyte assemblages could provide a practical, community-level indication of ecological status.</p>

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The genus Vaucheria (Xanthophyceae, Heterokontophyta) in Serbia: Distribution, ecology, co-occurring macroflora and implications for bioindication

  • 期刊论文

  • 发表日期：

    2026年7月5日

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  • Kristina A. Markeljić,
  • Aleksandra B. Rakonjac,
  • Duško L. Brković,
  • Snežana B. Simić

摘要

Despite the widespread distribution of the genus Vaucheria (Xanthophyceae), our knowledge of the genus and its species remains limited, with many research gaps yet to be filled. This study aimed to investigate distribution, ecological preferences and co-occurring macroflora of Vaucheria spp. in Serbian lotic ecosystems and to evaluate its potential application in bioindication. Between March 2017 and July 2025, field surveys were conducted at 525 sites across more than 200 rivers, streams, springs and waterfalls. A total of 121 Vaucheria spp. samples were collected from 90 sites. Most samples were sterile, with reproductive organs found in only three samples, while in seven additional samples they developed after ex situ cultivation. Two species were identified based on reproductive structures: V. bursata, recorded at new sites, and V. geminata, reported for the first time in Serbia’s algal flora. Fifty-eight macroflora species were observed in association with Vaucheria spp., including 46 macroalgal aggregations and 12 macrophytes. Vaucheria spp. occurred under a wide range of environmental conditions, with variable light, temperature, flow regimes and substrate types. Multivariate analyses showed that it reaches higher coverage in waters with elevated nitrate concentrations, suggesting its possible use as an indicator of nitrate levels in Serbian lotic ecosystems. Cluster analysis also showed that the co-occurring macroalgal and macrophyte assemblages could provide a practical, community-level indication of ecological status.