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<p>Understanding the responses of floodplain vegetation to abiotic gradients can be challenging. To simplify this difficulty, studies use an approach based on plant functional types (PFTs). In this study, we examine whether different PFTs, based on leaf habit and the distinction between simple and compound leaves, and nitrogen fixers can be used as proxies for different ecological strategies in Tropical Dry Floodplain Forests. Forty-three species were selected from two floodplains with different climatic and vegetational characteristics. Ten different functional traits were analyzed using Linear Mixed Effects Models (LME). Differences between the ten functional traits across the two study areas and between the two PFTs were tested. Four of the ten traits observed differ between the study areas, indicating that more conservative species dominate the floodplains of the area with greater climatic seasonality. We found that the compound deciduous PFT have higher specific leaf area and a higher Carlquist Vulnerability Index (CVI) compared to the simple evergreen PFT. We also observed a higher CVI in Leguminosae, suggesting the presence of species adapted to humid environments with some degree of water saturation, such as <i>Inga vera</i>. Differences were also found between PFTs regarding nitrogen use, but no differences were observed between Leguminosae and non-Leguminosae. This may be explained by the fact that nitrogen fixation is an optional metabolic pathway in legumes that exhibit nodulation but do not necessarily fix nitrogen, or that this pathway is used in nitrogen-limited systems.</p>

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Plant functional types represent partially the functional strategies in Tropical Dry Floodplain Forests

  • 期刊论文

  • 发表日期：

    2026年1月8日

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  • Fernanda Moreira Gianasi,
  • Felipe Carvalho Araújo,
  • Iván Prieto,
  • Fernanda Oliveira,
  • André Maciel Silva-Sene,
  • Camila Laís Farrapo,
  • Rafaella Tavares Pereira,
  • Ana Lívia Carvalho Rodrigues,
  • Leony Aparecido Silva Ferreira,
  • Lidiany Carolina Arantes Da Silva,
  • Miguel Gama Reis,
  • Rubens Manoel dos Santos

摘要

Understanding the responses of floodplain vegetation to abiotic gradients can be challenging. To simplify this difficulty, studies use an approach based on plant functional types (PFTs). In this study, we examine whether different PFTs, based on leaf habit and the distinction between simple and compound leaves, and nitrogen fixers can be used as proxies for different ecological strategies in Tropical Dry Floodplain Forests. Forty-three species were selected from two floodplains with different climatic and vegetational characteristics. Ten different functional traits were analyzed using Linear Mixed Effects Models (LME). Differences between the ten functional traits across the two study areas and between the two PFTs were tested. Four of the ten traits observed differ between the study areas, indicating that more conservative species dominate the floodplains of the area with greater climatic seasonality. We found that the compound deciduous PFT have higher specific leaf area and a higher Carlquist Vulnerability Index (CVI) compared to the simple evergreen PFT. We also observed a higher CVI in Leguminosae, suggesting the presence of species adapted to humid environments with some degree of water saturation, such as Inga vera. Differences were also found between PFTs regarding nitrogen use, but no differences were observed between Leguminosae and non-Leguminosae. This may be explained by the fact that nitrogen fixation is an optional metabolic pathway in legumes that exhibit nodulation but do not necessarily fix nitrogen, or that this pathway is used in nitrogen-limited systems.