Althénie Filiforme

Althenia filiformisF.Petit

Plante

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Filtrer le graphe par contexte spatialPays · région · aire protégée · écorégion · biome

Graphe en cours d’indexation

Calcul du tissu écologique de Althenia filiformis.

Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).

Liste rouge IUCN

DD · Données insuffisantes↘Décroissante

Évaluation complète

Évaluation: 2011 · v3.1
Altitude: – m
Profondeur: – m

État de la populationTexte officiel évaluation IUCNExpert

The species is found in Mediterranean France in Hérault (Agde, Etang-de-l'Or), Bouches-du-Rhône (Fos-sur-Mer, Saintes-Marie-de-la-Mer), Var (Grimaud). Most of the sites have not been seen for several decades. The species is also found along the Atlantic coast in Charente-Maritime, Loire-Atlantique and Vendée. In Corsica, it can be found at three sites that are less than 30 kilometres from each other and that are under pressure from tourism (L. Hugot pers. comm. 2010).

The sites in Puglia and Tuscany host only a few individuals and suffer from the degradation of their habitat. Due to confusion with A. orientalis the number of sites and population trends in Italy cannot be specified with certainty.

There are high levels of fluctuation in population size as well as presence and absence related to the water levels.

Menaces identifiées(10 menaces classées CMP-IUCN)

11_2
Droughts
Future
11_3
Temperature extremes
Future
1_1
Housing & urban areas
Ongoing
1_3
Tourism & recreation areas
Ongoing
6_1
Recreational activities
Future
7_3
Other ecosystem modifications
Ongoing
8_2
Problematic native species/diseases
Future
9_1_3
Type Unknown/Unrecorded
Future
9_2_3
Type Unknown/Unrecorded
Future
9_3_2
Soil erosion, sedimentation
Future

Description complète des menacesTexte détaillé évaluation IUCNExpert

Habitats of the species are threatened by urbanization and the filling in of the wetlands. Changes in water regimes such as the modification of flood period of water bodies or the changes of brackish (or saline) water to freshwater are further threats. Industrial contamination and other types of water pollution also impact the species. Tourism might impact the species as it is found along coasts.

Habitats préférentiels (classification IUCN)

13_4Marine Coastal/Supratidal - Coastal Brackish/Saline Lagoons/Marine Lakes★

Mesures de conservation recommandéesStratégies de conservation IUCNExpert

The species is legally protected in France. According to Conti et al. (1997) and Scoppola and Spampinato (2005) the species is Vulnerable. The site at Lago di Ortobello in Tuscany is protected by different regulations and is declared a Habitats Directive Site of Community Importance, a Ramsar site and a WWF reserve. However, water pollution is affecting those sites and this needs to be controlled. Monitoring of the sites is furthermore needed.

In order to determine the exact range of this species, fieldwork is necessary especially in those areas where it is suspected that records of A. filiformis are in fact A. orientalis.

For practical reasons, and due to similar habitat requirements and threats, conservation efforts in the Mediterranean should encompass both Althenia species.

Actions de conservation (1)Conservation Actions Classification Scheme — IUCNExpert

5_2Policies and regulations

Stress écologiques (13)Stresses Classification — IUCNExpert

1_1Ecosystem conversion
1_1Ecosystem conversion
1_1Ecosystem conversion
1_2Ecosystem degradation
1_2Ecosystem degradation
1_2Ecosystem degradation
1_2Ecosystem degradation
1_2Ecosystem degradation
1_2Ecosystem degradation
1_2Ecosystem degradation
2_1Species mortality
2_2Species disturbance
2_3_2Competition

Priorités de recherche (2)Research Needed Classification — IUCNExpert

1_2Population size, distribution & trends
3_1Population trends

Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert

Royaumes biogéographiques

Palearctic

Systèmes (terrestre/eau douce/marin)

Freshwater (=Inland waters)Marine

Formes de croissance

Hydrophyte

Références bibliographiques (12)Sources scientifiques de l'évaluation IUCNExpert

IUCN. 2025. The IUCN Red List of Threatened Species. Version 2025-1. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 27 March 2025).
IUCN. 2011. IUCN Red List of Threatened Species (ver. 2011.1). Available at: <a href="http://www.iucnredlist.org">http://www.iucnredlist.org</a>. (Accessed: 30 June 2017).
Talavera, S. and García-Murillo, P. 2010. Althenia Petit. Flora Iberica. Vol. XVII, pp. 9-11. Real Jardín Botánico, CSIC, Madrid.
WCSPF. 2010. World Checklist of Selected Plant Families. Available at: <a href="http://www.kew.org/wcsp/">http://www.kew.org/wcsp/</a>.
Scoppola, A. and Spampinato, G. 2005. Atlante delle specie a rischio di estinzione. In: A. Scoppola and C. Blasi (eds), Stato delle conoscenze sulla flora vascolare d'Italia, Palombi Editori, Roma.
Conti, F., Manzi, A. and Pedrotti, F. 1997. Liste Rosse Regionali delle Piante d'Italia. WWF Italia and Società Botanica Italiana, Camerino, Italy.
Lambinon, J. 1989. Althenia filiformis Petit var. barrandonii (Duval-Jouve) P. García Murillo et Talavera. In Jeanmonod, D., Burdet, H.M. (eds.). 1989. Notes et contributions à la flore de Corse, IV. Candollea 44: 374-375.
García Murillo, P. and Talavera, S. 1986. El genero Althenia Petit. Lagascalia 14(1): 102-114.
Molinier R. 1981. Catalogue des plantes vasculaires des Bouches-du-Rhône. Imprimeri municipale, Marseille.
Molinier R. and Tallon G. 1965. Etudes botaniques en Camargue. I La Camargue pays de dunes. La Terre et la Vie 1-2: 6-127.
Loret H. and Barrandon A. 1888. Flore de Montpellier ou analyse descriptive des plantes vasculaires de l'Hérault (2ème édition revue et corrigée par Loret). G. Masson & J. Callas, Paris & Montpellier.
Barrandon A. 1871. Compte rendu de quelques promenades aux environs de Montpellier. Bull. Soc. Bot. France 18: 170-175.

Évaluateurs & contributeurs (3)Personnes ayant contribué à l'évaluation IUCNExpert

assessor

Bedini, G., Foggi, B., García Murillo, P., Grillas, P., Hugot, L. & Peruzzi, L.

contributor

Diadema, K.

evaluator

Bilz, M. & Lansdown, R.V.

⚠ 1 erratum publié après l'évaluation.

Bedini, G., Foggi, B., García Murillo, P., Grillas, P., Hugot, L. & Peruzzi, L. 2011. Althenia filiformis (errata version published in 2025). The IUCN Red List of Threatened Species 2011: e.T164432A274201706. Accessed on 05 May 2026.

Indicateurs écologiquesTolérance thermique · radar EIVE · triangle CSR

Indicateurs écologiques Ellenberg-type

EIVE 1.0 — Dengler 2023

Position de l'espèce sur les 5 dimensions écologiques européennes (M / N / R / L / T), échelle 0-10. La zone estompée représente la niche width (variabilité tolérée).

Humidité: xérophile ↔ hygrophile
Azote: oligotrophe ↔ nitrophile
Réaction (pH): silicicole ↔ calcicole
Lumière: sciaphile ↔ héliophile
Température: cryophile ↔ thermophile

Source : EIVE 1.0 (Dengler et al. 2023). CC-BY 4.0. Échelle harmonisée 0-10 (équivalent inverse-rang sur les systèmes Ellenberg, Landolt, Pignatti, etc.). Niche width = écart-type d'estimation, indicateur de fiabilité (zone estompée).