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<p>Wetlands are essential ecosystems for maintaining biodiversity and regulating hydrological cycles, but they are increasingly threatened by climate change and human activities. One of the most concerning effects is the rising frequency of fires. This study aimed to investigate the post-fire regeneration capacity of <i>Echinodorus longiscapus</i> and the response of other aquatic plants species from the seed banks. The study was carried out in permanent plots of the PELD Pantanal, a long-term experiment featuring prescribed burns, located in the Abobral region of Mato Grosso do Sul, Brazil. Observations were made of <i>E. longiscapus</i> regrowth, and soil was collected post-fire to evaluate the seed bank. The results showed that <i>E. longiscapus</i> has a high potential for regrowth via rhizomes post-fire. Additionally, eight aquatic plants species germinated from the non-dormant seed bank, with <i>Rotala ramosior</i> and <i>Helanthium tenellum</i> being the most abundant. The limited number of germinated species indicates low diversity in the non-dormant seed bank. The regrowth of <i>E. longiscapus</i> demonstrates a functional adaptation to remain in the environment after removal of the aerial part. However, this resilience could also make it a potentially invasive species. The fire frequency and the impacts of climate change may intensify this invasive behavior, leading to the homogenization of vegetation and the loss of genetic variability. The study emphasizes the importance of understanding the regeneration strategies of aquatic plants in fire-prone environments.</p>

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Fire and Wetlands: How Echinodorus Longiscapus Bounces Back Like It Never Left?

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • Francielli Bao

摘要

Wetlands are essential ecosystems for maintaining biodiversity and regulating hydrological cycles, but they are increasingly threatened by climate change and human activities. One of the most concerning effects is the rising frequency of fires. This study aimed to investigate the post-fire regeneration capacity of Echinodorus longiscapus and the response of other aquatic plants species from the seed banks. The study was carried out in permanent plots of the PELD Pantanal, a long-term experiment featuring prescribed burns, located in the Abobral region of Mato Grosso do Sul, Brazil. Observations were made of E. longiscapus regrowth, and soil was collected post-fire to evaluate the seed bank. The results showed that E. longiscapus has a high potential for regrowth via rhizomes post-fire. Additionally, eight aquatic plants species germinated from the non-dormant seed bank, with Rotala ramosior and Helanthium tenellum being the most abundant. The limited number of germinated species indicates low diversity in the non-dormant seed bank. The regrowth of E. longiscapus demonstrates a functional adaptation to remain in the environment after removal of the aerial part. However, this resilience could also make it a potentially invasive species. The fire frequency and the impacts of climate change may intensify this invasive behavior, leading to the homogenization of vegetation and the loss of genetic variability. The study emphasizes the importance of understanding the regeneration strategies of aquatic plants in fire-prone environments.