Portail documentaire

Global assessment of aquatic Isoëtes species ecology / Mattia M. Azella in Freshwater Biology, 69 (10) (2024) 

Public Citation [article]  inFreshwater Biology > 69 (10) (2024) . - 1420-1437 Titre : Global assessment of aquatic Isoëtes species ecology Type de document : Imprimé Auteurs : Mattia M. Azella ; Alice Dalla Vecchia ; Thomas Abeli ; Janne Alahuhta ; Victor B. Amoroso ; Enric Ballesteros (1958-) ; Vincent Bertrin (1978-) ; Daniel F. Brunton ; Alexander A. Bobrov ; Cecilio Caldeira ; Simona Ceschin ; Elena V. Chemeris ; Martina Čtvrtlíková ; Mary de Winton ; Esperança Gacia i Passola ; Oleg G. Grishutkin ; Deborah Hofstra ; Daniella Ivanova ; Maria O. Ivanova ; Nikita K. Konotop ; Danelle M. Larson ; Sara Magrini ; Marit Mjelde ; Olga A. Mochalova ; Guilherme Oliveira ; Ole Pedersen ; Jovani B. de S. Pereira ; Cristina Ribaudo ; María Inmaculada Romero Buján ; Angelo Troía ; Yulia S. Vinogradova ; Polina A. Volvoska ; Daniel Basílio Zandonadi ; Nadezhda V. Zueva ; Rossano Bolpagni Année de publication : 2024 Article en page(s) : 1420-1437 Langues : Anglais (eng) Mots-clés : Isoetes echinospora Durieu, 1861  Isoetes lacustris L. Résumé : 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 Red List in 2023. Many species were determined to be sensitive to certain water physical and chemical factors, generally preferring oligotrophic conditions such as low total phosphorus, moderate total nitrogen, moderate to low pH, and low conductivity. This analysis includes ecological data in the assessment of rare/threatened aquatic plants globally. This new database and the ecological analyses completed defined the ecological requirements of several species and identified knowledge gaps, which can aid management actions and future research. This paper highlights ecological significance and environmental sensitivities of aquatic Isoëtes. The current level of knowledge is inadequate for a large proportion of known taxa. We affirm the extreme need to support global, collaborative initiatives on which to build future conservation strategies. Lien pérenne : DOI : 10.1111/fwb.14316 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=153664 Azella, Mattia M., Dalla Vecchia, Alice, Abeli, Thomas, Alahuhta, Janne, Amoroso, Victor B., Ballesteros, Enric (1958-), Bertrin, Vincent (1978-), Brunton, Daniel F., Bobrov, Alexander A., Caldeira, Cecilio, Ceschin, Simona, Chemeris, Elena V., Čtvrtlíková, Martina, Winton, Mary de, Gacia i Passola, Esperança, Grishutkin, Oleg G., Hofstra, Deborah, Ivanova, Daniella, Ivanova, Maria O., Konotop, Nikita K., Larson, Danelle M., Magrini, Sara, Mjelde, Marit, Mochalova, Olga A., Oliveira, Guilherme, Pedersen, Ole, Pereira, Jovani B. de S., Ribaudo, Cristina, Romero Buján, María Inmaculada, Troía, Angelo, Vinogradova, Yulia S., Volvoska, Polina A., Zandonadi, Daniel Basílio, Zueva, Nadezhda V., Bolpagni, Rossano 2024 Global assessment of aquatic Isoëtes species ecology. Freshwater Biology, 69(10): 1420-1437.

Documents numériques

Consultable article (2024) URL

Mass invasion of non-native Elodea canadensis Michx. in a large, clear-water, species-rich Norwegian lake – impact on macrophyte biodiversity / Marit Mjelde in Annales de Limnologie, 48 (2012) 

Public Citation [article]  inAnnales de Limnologie > 48 (2012) . - 225-240 Titre : Mass invasion of non-native Elodea canadensis Michx. in a large, clear-water, species-rich Norwegian lake – impact on macrophyte biodiversity Type de document : Imprimé Auteurs : Marit Mjelde ; Paola Lombardo ; Dag Berge ; Stein W. Johansen Année de publication : 2012 Article en page(s) : 225-240 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Enjeux de conservation des lacs d'altitude [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Najas flexilis Résumé : The impact of Elodea canadensis on aquatic macrophyte biodiversity in (Lake) Steinsfjord has been studied through extensive lake-wide surveys and photographic sampling. E. canadensis greatly expanded in Steinsfjord since its appearance in 1978 and still dominated the macrophyte community in 2004. The areal distribution of E. canadensis peaked within 6 years from invasion and has remained relatively stable since; however, stands no longer reach the water surface. E. canadensis significantly increased its depth range, but the cover-weighted mean depth remained unchanged, suggesting that 3–4 m is its optimal depth in Steinsfjord. Species richness has not changed significantly since the earliest survey in 1936–38. However, species composition has changed remarkably, from isoetid dominance in 1936–38 to a diverse community dominated by Najas flexilis in 1979–80 to a less diverse community dominated by E. canadensis in 2004, with Potamogeton berchtoldii and Myriophyllum alterniflorum as lake-wide subdominants. Regardless of their abundance at the onset of the E. canadensis invasion, taxa whose cover-weighted mean depth overlapped with E. canadensis's in 1979–80 greatly reduced their abundance in 2004, shifted to deeper or shallow water or disappeared from sampling stations. Our survey indicates that E. canadensis may be the reason for the decrease of N. flexilis, likely through depletion of CO2 in the water column and reduced nutrients in sediments. The abilities to survive and grow in periodically exposed shallow areas, combined with minor herbivory by waterfowl, are likely important factors for the increase of M. alterniflorum in Steinsfjord's shallow waters. Lien pérenne : DOI : 10.1051/limn/2012016 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150987 Mjelde, Marit, Lombardo, Paola, Berge, Dag, Johansen, Stein W. 2012 Mass invasion of non-native Elodea canadensis Michx. in a large, clear-water, species-rich Norwegian lake – impact on macrophyte biodiversity. Annales de Limnologie, 48: 225-240.

Documents numériques

Consultable Article (2012) URL