Nouvelles observations de <i>Gastrodia similis</i> Bosser dans le Nord de La Réunion et intérêt des écosystèmes hydrides pour la conservation de la biodiversité de l’île (Orchidaceae, Gastrodieae)

  • Stéphane AUGROS ECO-MED Océan Indien
  • Florent MARTOS CIRAD, UMR PVBMT

Résumé

Abstract: Once established, second-growth forests dominated by alien plants may provide suitable environmental conditions for the maintenance of populations of some rare native species, and thus should not be neglected in conservation studies. We illustrate the case of Gastrodia similis Bosser, a small terrestrial orchid endemic to the lowland rainforest of Reunion island. Despite some very specific ecological requirements (necessary mycorrhizal symbiosis with wood-decay fungi and pollination by specialized drosophilid flies), the populations of this rare species are spreading beneath some secondary forests growing at low altitude, extending northward the species geographical distribution. Other native species might also restore populations in this place. We call for more biodiversity assessments and experimental trials in these hybrid ecosystems.

Keywords: secondary forests, oceanic island restoration, rare species, mycoheterotrophic plants.

Publiée
2016-08-20
Comment citer
AUGROS, S., & MARTOS, F. (2016). Nouvelles observations de <i>Gastrodia similis</i&gt; Bosser dans le Nord de La Réunion et intérêt des écosystèmes hydrides pour la conservation de la biodiversité de l’île (Orchidaceae, Gastrodieae). Cahiers Scientifiques De L’océan Indien Occidental, 7. Consulté à l’adresse http://www.cahiers-wio.org/ojs/index.php/Cahiers-scientifiques-WIO/article/view/42
Rubrique
Notes d'observation