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Heterogeneous forest structures favor persistence of the grassland Mediterranean geophyte Gagea lacaitae
Botany Letters ( IF 1.5 ) Pub Date : 2019-10-15 , DOI: 10.1080/23818107.2019.1668295
Hugo Fontes 1, 2 , Antoine Gazaix 1, 3 , Guillaume Papuga 3, 4
Affiliation  

Land use changes in the northern Mediterranean basin threaten our ability to conserve its habitats and species. Reduced grazing has led to local declines in grassland species and colonization by forest species leading to conservation actions aimed at restoring open habitats. Recently, populations of Gagea lacaitae, a bulbous species typical of Mediterranean open xeric grasslands, have been discovered in forest clearings, an unexpected habitat for this species. Here, we surveyed 48 plots to characterize and compare the ecological niche of G. lacaitae growing in both open xeric and forest clearing habitats. We recorded floristic composition and plant cover and collected soil samples to measure water retention capacity, pH, organic matters and conductivity. Open xeric grasslands and forest clearings differ in plant cover, community composition, and microhabitat structure but not in plant diversity, mean soil conditions, or G. lacaitae cover. Key similarities in conditions allow this species to persist in woodlands that heterogenous enough to include clearings. Such habitats have value for conserving this species and should be sustained.



中文翻译:

异质森林结构有利于草地地中海地中海植物Gagea lacaitae的存留

地中海北部盆地的土地利用变化威胁着我们保护其栖息地和物种的能力。放牧减少导致草原物种的局部减少和森林物种的殖民化,从而导致旨在恢复开放生境的保护行动。最近,在森林开阔地上发现Gagea lacaitae(一种地中海开放性干草原典型的球茎物种)的种群,这是该物种意想不到的栖息地。在这里,我们调查了48个样地,以表征和比较G. lacaitae的生态位在开放的干燥和森林砍伐生境中生长。我们记录了植物区系组成和植物覆盖度,并收集了土壤样品以测量保水能力,pH,有机物和电导率。开放的干燥草原和森林砍伐区在植物覆盖率,群落组成和微生境结构方面有所不同,但在植物多样性,平均土壤状况或G. lacaitae覆盖率方面没有差异。在条件上的关键相似之处使该物种能够在异质的林地中得以生存,足以包括空地。这些栖息地对于保护该物种具有价值,应予以维持。

更新日期:2019-10-15
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