02275nas a2200289   4500008004100000245011600041210006900157260001200226300001400238490000800252520133300260653002301593653002301616653001201639653002001651653002001671653001801691653003301709653002401742653001501766653002201781100001401803700001601817700002001833700001601853856011601869       2004                        eng d00aExperimental management of Mediterranean temporary pools for conservation of the rare quillwort Isoetes setacea0 aExperimental management of Mediterranean temporary pools for con  c2004///  a675 - 6840 v1183 aMediterranean temporary pools represent unique species-rich habitats with many rare and endangered species. The Roque-Haute Natural Reserve is one of the few sites in France with Isoetes setacea Lam., a very rare Mediterranean quillwort, considered as a keystone species determining a priority habitat for the European Union. Land uses changes have favoured the invasion of the pools by several shrub and tree species (e.g., Ulmus minor, Fraxinus angustifolia subsp. oxycarpa). Clearing shrubs in an experimental area of one pool resulted in the increase of I. setacea as compared to control, combining a higher cover in previously occupied quadrats and more quadrats occupied. Litter accumulation had a negative effect on the population of Isoetes but this effect was detectable only in the cleared area. Light attenuation was shown experimentally to be detrimental to the vegetative and regenerative production of I. setacea. Clearing of the shrubs and removal of the litter led to an increase in the I. setacea populations and therefore appears to be an effective technique for restoring these plant communities invaded by shrubs. Long-term shrub control should be ensured by reintroducing sheep grazing in order to enhance the sustainable conservation of this oligotrophic habitat. © 2003 Elsevier Ltd. All rights reserved.10aArtificial shading10aEndangered species10aGrazing10aIsoetes setacea10aLight reduction10aLitter effect10aMediterranean seasonal pools10aSexual reproduction10aSpore-bank10aVegetative growth1 aRhazi, M.1 aGrillas, P.1 aCharpentier, A.1 aMédail, F.  uhttp://www.scopus.com/inward/record.url?eid=2-s2.0-2042522718&partnerID=40&md5=9b3e2127f0abc60df6e5407fa4e555ec