Antoine Gazaix

• PhD
• Researcher at Tour du Valat

Le présent document constitue le second « rapport scientifique sur l’état de conservation des espèces et des habitats et sur les indicateurs de réussite des mesures compensatoires relatives au parc logistique portuaire de Port-La Nouvelle ». Il rassemble la synthèse des résultats acquis au cours des années 2016 à 2021.

The ecological niche defines the favourable range of a species in a multidimensional space of ecological factors that determine the presence and function of individuals. This fundamental concept in ecology is widely used to understand plant species coexistence and segregation. In this study, we test for ecological differentiation among six annual L...

The ecological niche defines the favorable range of a species in a multidimensional space of ecological factors that determine the presence and function of individuals. This fundamental concept in ecology is widely used to understand plant species coexistence and segregation. In this study we test for ecological differentiation among six annual Lyt...

Les mares temporaires méditerranéennes abritent une biodiversité exceptionnelle et très menacée. Les espèces inféodées à ces milieux s’expriment au gré de mises en eau hivernales et de longs assecs estivaux. Les espèces annuelles survivent à ces assecs sous forme de graines. Mieux comprendre le fonctionnement des banques de graines permet d’ajuster...

Species of the genus Lythrum Linnaeus (1753: 446) (Lythraceae) occur in temporary pools and wetlands (Morris, 2007) with about 35 species around the world (Graham, 2007). In the Mediterranean area, there are more than 10 species that mostly occur in temporary pools (Castroviejo Bolibar et al., 1997; Tison et al. 2014). Most of the species are also...

Ecologie des Lythrum annuels des ma res temporaires méditerranéennes. Ap pl i cati ons à l a c onser va ti on de L. t hesi oi des da ns les C ost ières de Nî mes .

Mediterranean temporary pools are threatened ecosystems that host a unique plant community, mostly composed of annual species with large and long-lived seed banks. The longevity of their seed bank, the scarcity of their habitat, the small size of their populations and the low frequency of above-ground vegetation result in a low probability of detec...

Land use changes in the northern Mediterranean basin threaten our ability to conserve its habitats and species. Reduced grazing has led to local declines in grassland species and colonization by forest species leading to conservation actions aimed at restoring open habitats. Recently, populations of Gagea lacaitae, a bulbous species typical of Medi...

Mediterranean Temporary Ponds (MTPs), characterized by alternate winter flooding and summer drought, resulted in a highly specialized flora (Grillas et al., 2004), which is of high conservation interest (Quezel, 1982) but threatened (Rhazi et al., 2012). Among this Flora, Lythrum thesioides is a very rare annual species, known from only 3 different...

Mediterranean temporary ponds are characterized by an alternation of winter flooding and summer drought. These environmental conditions have contributed to the presence of a specialized flora, dominated by annual species with high fecundity and large perennial seed banks. A very particular annual plant only found in this habitat is Lythrum thesioi...

Mediterranean Temporary Ponds (MTP) are characterized by marked variation in water level under a Mediterranean climate. These environmental conditions have resulted in their highly specialized flora, dominated by annual species with high seed sets. Among these, Lythrum thesioidesis a very rare annual plant, recorded from Russia, Italy, Hungary and...