Appearance of a population of the mangrove rail <i>Rallus longirostris</i> (Rallidae) in salt marshes invaded by the exotic tanner grass <i>Urochloa arrecta</i> (Poaceae) and its disappearance after plant management.

The apparent advantages of nesting in the lower layer in Urochloetum are the support for the nests and the buoyancy of the biomass under high-tide conditions, which could potentially reduce reproductive losses from flooding—an impact that is quite significant for wetland birds (Marshall and Reinert 1990 ; Shriver 2002 ; Greenberg et al. 2006 ; Reinert 2006 ; Norbdy et al. 2009 ).

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