Île aux Aigrettes

Île aux Aigrettes
Geografia fisica
LocalizzazioneOceano Indiano
Coordinate20°25′12″S 57°43′58″E
ArcipelagoMascarene
Superficie0,25 km²
Geografia politica
StatoMauritius (bandiera) Mauritius
Demografia
Abitanti0
Cartografia
Mappa di localizzazione: Mauritius
Île aux Aigrettes
Île aux Aigrettes
voci di isole presenti su Wikipedia
Île aux Aigrettes
Tipo di areaRiserva naturale
Codice WDPA5054
Class. internaz.Categoria IUCN IV
StatiMauritius (bandiera) Mauritius
Superficie a terra0,25 km²
Provvedimenti istitutivi1965
GestoreMauritian Wildlife Foundation
Mappa di localizzazione
Map
Sito istituzionale
Modifica dati su Wikidata · Manuale

L'Île aux Aigrettes è una piccola isola situata al largo della costa sud-orientale di Mauritius, in prossimità della città di Mahébourg.

Al pari dell'isola madre, l'Île aux Aigrettes è stata sottoposta a un'intensa deforestazione, e l'introduzione di specie esotiche, animali e vegetali, ha quasi distrutto e sostituito la fauna e la flora autoctone.

Nel 1965 l'isola è stata classificata come Riserva naturale[1] ed è affidata alla gestione della Mauritian Wildlife Foundation, che si è impegnata nel ripristino della flora originaria e nella reintroduzione di specie ormai scomparse.

Territorio

È un'isola di calcare corallino, di forma grossomodo circolare, che sorge a circa 800 m dalla costa, nella baia di Mahébourg, al largo di Pointe Jerome.[2]

Flora

L'ente gestore ha avviato un programma di eradicazione delle specie invasive quali la falsa acacia (Leucaena leucocephala) e il prugnolo malgascio (Flacourtia indica), e di tutela e rigenerazione delle specie native quali, tra le altre, l'ebano endemico, il cui nome scientifico (Diospyros egrettarum) deriva proprio dal luogo, la Dracaena concinna, localmente nota come "bois de chandelle", e l'orchidea epifita Oeoniella polystachys.[2]

Fauna

A seguito di progetti di reintroduzione, sono presenti la colomba rosata (Nesoenas mayeri), l'occhialino olivaceo di Mauritius (Zosterops chloronothos) e il tessitore di Mauritius (Foudia rubra). È stato fatto anche un tentativo, non riuscito, di reintrodurre il gheppio di Mauritius (Falco punctatus).[2]

È stata anche introdotta una popolazione di tartarughe giganti di Aldabra (Aldabrachelys gigantea) che si sono rivelate efficaci disseminatrici dei semi di Diospyros egrettarum, andando a occupare la nicchia ecologica che un tempo apparteneva alle estinte tartarughe giganti del genere Cylindraspis.[3] Altri rettili presenti sono il geco diurno di Mauritius (Phelsuma ornata), da sempre presente sull'isola, che convive con popolazioni del geco diurno di Round Island (Phelsuma guentheri) e dello scinco di Telfair (Leiolopisma telfairii), importate da Round Island.[2]

Accessi

L'accesso all'isola è consentito solo in gruppi accompagnati dalla Mauritian Wildlife Foundation (MWF). Le visite guidate, con partenze pluriquotidiane da Pointe Jerome, consentono di raggiungere l'isola su imbarcazioni a motore e di visitare i punti di maggiore interesse conservazionistico sotto la guida di un ranger della MWF.[4]

Note

  1. ^ (EN) Île aux Aigrettes Nature Reserve, in World Database on Protected Areas. URL consultato il 26 ottobre 2016.
  2. ^ a b c d (EN) Ile aux Aigrettes, in Mauritian Wildlife Foundation (MWF). URL consultato il 27 ottobre 2016.
  3. ^ (EN) Griffiths C.J. et al., Resurrecting Extinct Interactions with Extant Substitutes (PDF), in Current Biology, vol. 21, n. 9, 2011, pp. 762–765.
  4. ^ (EN) Visit Île aux Aigrettes, in Mauritian Wildlife Foundation (MWF). URL consultato il 18 novembre 2016.

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