Abstract

CARABALLO-GRACIA, Pedro Ramón; MARTINEZ-PRADA, Sofia  and  SALCEDO-DIAZ, Ana. Trophic relations in an agroecosystem of the Sabanas region, Sucre, Colombia. Pastos y Forrajes [online]. 2019, vol.42, n.2, pp.152-160. ISSN 0864-0394.

The objective of this study was to define the existing trophic relations in the agroecosystem of a farm in the Sabanas region, Sucre, Colombia. The research started from previous studies in the farm and from field observations between 2014 and 2017. Information of the species was compiled, which allowed to group them according to their feeding habits into trophospecies. The energy flow was shown through a binary matrix of interrelations, and the data were analyzed by designing a trophic network. Six orders, two families, eight genera and one 166 six species were identified. From these groups 11 trophic categories were established: producers, herbivores, nectarivores, granivores, insectivores, carnivores, omnivores, decomposers, hematophages, frugivores and scavengers, distributed in 48 trophospecies. The trophic network showed connection density of 3,25 and a connectance value of 0,13. It is concluded that the trophic network of the agroecosystems allowed to differentiate the fundamental patterns in the trophic organization of the individuals, and showed the importance of some of them in the energy flow between basal and higher trophospecies.

Keywords : biodiversity; energy exchange; trophic levels.

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