ROMERO BUJÁN, María
Universidade de Santiago de Compostela [España] = University of Santiago de Compostela [Spain] = Université de Saint-Jacques-de-Compostelle [Espagne] [USC]

TROÌA, Angelo
International Union for Conservation of Nature [IUCN]

VINOGRADOVA, Yulia
Papanin Institute for Biology of Inland Waters

VOLKOVA, Polina
Papanin Institute for Biology of Inland Waters

ZANDONADI, Daniel

ZUEVA, Nadezhda
Russian State Hydrometeorological University [St.Petersburg] [RSHU]

BOLPAGNI, Rossano
Università degli studi di Parma = University of Parma [UNIPR]

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Freshwater Biology. 2024-08-17, vol. 69, p. 1420 - 1437

Résumé en anglais

Isoëtes are iconic but understudied wetland plants, despite having suffered severe losses globally mainly because of alterations in their habitats. We therefore provide the first global ecological assessment of aquatic Isoëtes to identify their environmental requirements and to evaluate if taxonomically related species differ in their ecology. The assessment resulted in an extensive new database on aquatic Isoëtes, ecological niche analyses, and descriptive species accounts. We compiled a global database that includes all known environmental data collected from 1935 to 2023 regarding aquatic Isoëtes. We then evaluated the environmental drivers of 16 species using 2,179 global records. Additionally, we used hypervolume analysis to quantify the ecological niches of the two species with the greatest number of records, finding significant differences and evidence that Isoëtes echinospora occupies a wider ecological niche than Isoëtes lacustris. Fifty-nine species (30% of the c. 200 Isoëtes species known today) were categorised as aquatic and were mainly reported in the Americas and northern Europe. About 38% of the aquatic species are threatened with extinction or are endemic to a small region, according to the International Union for Conservation of Nature's.< Réduire

Mots clés en anglais

ecological niche

Isoëtes echinospora

Isoëtes lacustris

isoëtids

quillworts

submerged macrophyte conservation

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Global assessment of aquatic Isoëtes species ecology

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