Caracterización de la población de Thymus carnosus Boiss. (Lamiaceae) en la flecha de El Rompido (Lepe, Huelva, sur de España)bases para la gestión

  1. Juan García de Lomas 1
  2. María Concepción Saavedra 1
  3. Laura Fernández Carrillo 1
  4. Óscar Romero 1
  5. Ildefonso Martín 1
  6. Carmen Rodríguez Hiraldo 2
  7. Enrique Martínez Montes 3
  1. 1 Agencia de Medio Ambiente y Agua de Andalucía
  2. 2 Consejería de Medio Ambiente y Ordenación del Territorio
  3. 3 Paraje Natural Marismas del Odiel
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Journal:
Revista de la Sociedad Gaditana de Historia Natural: RSGHN

ISSN: 2340-5759

Year of publication: 2016

Volume: 10

Pages: 5-13

Type: Article

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Abstract

Thymus carnosus Boiss. (Lamiaceae) is a small shrub endemic of the southwest coast of the Iberian Peninsula, which is listed as "critically endangered" in Andalusia and protected by law. El Rompido Spit, in the coast of Lepe (Huelva), houses the main population in Spain. The expasion of the native shrub Retama monosperma threatens its conservation. In this paper, the main characteristics of T. carnosus in El Rompido Spit are provided, with regard to local distribution, vigor, sex-ratio, demography and accompanying plant community. T. carnosus preferably occupies fixed dunes with herbaceous vegetation, between the lee of the primary dune and the mature coastal scrub. The abundance of T. carnosus was different between the patchesstudied (n = 1136 and 226 individualsin the patches 1 and 2, respectively) and was associated with significant differencesin the coverage of Retama and composition of the accompanying vegetation. Patch 1 was associated with a lower density of Retama,showed significantsmaller sizes, and evidence of recruitment. The proportion of hermaphrodites was 3.3 times higher than females. In contrast, Patch 2 occupied a mature and closed Retama shrub, older individuals, a higher proportion of females (hermaphrodites / females = 1.9) and no recruitment. The vigor was similar in both patches. These results provide an updated characterization of T. carnosus in the East end of its natural range and provide a basis for action planning to preserve the species and recovery of its favorable habitats, which are being carried out by the Regional Environmental Council, under the LIFE project CONHABIT ANDALUSIA

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