Resumo

CHIQUINI-HEREDIA, Websters et al. Structure and diversity in floodable jungle in central and Southern Calakmul. Ecosistemas y recur. agropecuarios [online]. 2017, vol.4, n.12, pp.511-524. ISSN 2007-901X.  https://doi.org/10.19136/era.a4n12.859.

Nine sites were set in different communities in central and Southern Calakmul Municipality in order to describe the structure and composition of arboreous species in the floodable jungle (SI), also known as floodable lowlands or vegetation of Ak'alches. 2 212 individuals, 112 species and 36 families were counted in the census. The baseline area varied between 5.6 and 18.2 m2 ha-1, and species with greater importance were Coccoloba reflexiflora, Gymnanthes lucida, Haematoxylum campechianum, Manilkara zapota, Matayba oppositifolia, Metopium brownei and Sebastiania adenophora. The greater similarity was between the sites in the central part of the municipality; the diversity of the Carlos A. Madrazo, El Carmen II, Josefa Ortiz de Domínguez, Centauro del Norte, Ley de Fomento Agropecuario, Narciso Mendoza, Nuevo Conhuás, Unidad y Trabajo sites did not show significant differences (p < 0.05). The horizontal structure of vegetation was similar in all sites. The greater amount of individuals plus 50% were grouped in the categories between 2.5 and 8.4 cm. The vertical structure showed similar behavior between sites; 50% of individuals was concentrated between 5 an 10 m. The SI has species whose conservation has priority both in national and international programs. In view of their importance in supply of water and food for the fauna of the región, it is considered that they are areas in which conservation programs should be implemented in.

Palavras-chave : Structural diversity; relative importance valué; dominant ligneous species.