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<p><i>Iris aphylla</i> is a threatened species in Romania, otherwise distributed across Central and Eastern Europe, extending into the Caucasus and Asia Minor Anatolia. This study aims to identify its environmental requirements and phytocoenological preferences in Romania. To this end, 302 phytocoenological relevés were analysed for vegetation. Information is presented on bioclimatic and topographical factors. For multivariate analysis, detrended correspondence analysis (DCA) and canonical correspondence analysis (CCA) were applied. The results show that <i>I. aphylla</i> was most frequently recorded in the associations <i>Taraxaco serotinae-Festucetum valesiacae</i> and <i>Jurineo transylvanicae-Stipetum pulcherrimae</i>. The representative EUNIS habitat for <i>I. aphylla</i> is R1B Continental dry grassland (true steppe). Cluster analysis separated 302 relevés into six distinct floristic groups. Furthermore, <i>I. aphylla</i> occurred at elevations ranging from 300 to 599 m a.s.l. on very steep slopes with south-eastern and south-western aspects. <i>Iris aphylla</i> was also found in areas with annual precipitation ranging from 400 to 600 mm and annual mean temperature between 5 and 10°C. Canonical correspondence analysis revealed that elevation was the most significant factor influencing the floristic composition of vegetation with <i>I. aphylla</i>. In conclusion, <i>I. aphylla</i> is associated with dry continental grasslands, and its distribution and abundance are determined by climatic (annual precipitation) and topographic (elevation) gradients. Habitat degradation caused by land use change and overgrazing is a major threat, which requires specific grassland management to ensure the long-term conservation of the species. Habitat protection by limiting forest plantations and infrastructure development is necessary. Regular monitoring and further ecological studies on the effects of climate change will support the adaptation of conservation strategies.</p>

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Habitat preferences of Iris aphylla (Iridaceae Juss.), a rare species in Romania

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • Simona Dumitrița Chirilă,
  • Alexandru Sabin Bădărău,
  • Kiril Vassilev,
  • Ana Mariana Chirilă,
  • Iuliia Vasheniak,
  • Mihai Doroftei

摘要

Iris aphylla is a threatened species in Romania, otherwise distributed across Central and Eastern Europe, extending into the Caucasus and Asia Minor Anatolia. This study aims to identify its environmental requirements and phytocoenological preferences in Romania. To this end, 302 phytocoenological relevés were analysed for vegetation. Information is presented on bioclimatic and topographical factors. For multivariate analysis, detrended correspondence analysis (DCA) and canonical correspondence analysis (CCA) were applied. The results show that I. aphylla was most frequently recorded in the associations Taraxaco serotinae-Festucetum valesiacae and Jurineo transylvanicae-Stipetum pulcherrimae. The representative EUNIS habitat for I. aphylla is R1B Continental dry grassland (true steppe). Cluster analysis separated 302 relevés into six distinct floristic groups. Furthermore, I. aphylla occurred at elevations ranging from 300 to 599 m a.s.l. on very steep slopes with south-eastern and south-western aspects. Iris aphylla was also found in areas with annual precipitation ranging from 400 to 600 mm and annual mean temperature between 5 and 10°C. Canonical correspondence analysis revealed that elevation was the most significant factor influencing the floristic composition of vegetation with I. aphylla. In conclusion, I. aphylla is associated with dry continental grasslands, and its distribution and abundance are determined by climatic (annual precipitation) and topographic (elevation) gradients. Habitat degradation caused by land use change and overgrazing is a major threat, which requires specific grassland management to ensure the long-term conservation of the species. Habitat protection by limiting forest plantations and infrastructure development is necessary. Regular monitoring and further ecological studies on the effects of climate change will support the adaptation of conservation strategies.