Abstract

TAMARIS TURIZO, Cesar Enrique  and  RODRIGUEZ BARRIOS, Javier. Transport of Organic Matter Across a Tropical Mountain Stream of Sierra Nevada De Santa Marta (Colombia). Acta biol.Colomb. [online]. 2015, vol.20, n.3, pp.209-216. ISSN 0120-548X.  https://doi.org/10.15446/abc.v20n3.45421.

In tropical streams organic matter is the principal source of energy for the communities in the river. Main components of organic matter are coarse-particulate organic matter (CPOM) and fine particulate organic matter (FPOM). Therefore, transport of CPOM and FPOM and its relationship with some physical and chemical variables was evaluated, on three sections of an altitudinal gradient from 50 to 1700 masl during a daily-cycle at Gaira river. Samples were taken monthly from March to June 2008.-It was observed significant differences in drift of CPOM between stations. Station 2 (middle part), first sample, recorded the highest value (474 kg m^-3) and station 3 showed the lowest lower value of drift biomass (0.26 kg m^-3) during the study. FPOM showed similar values during all the sampling (0.58 - 6.34 g m^-3). However, significant differences were detected between sampling three and four. Transport of FPOM decreased with the increase of precipitation. A inverse relationship between water velocity and transport of CPOM was observed, while the FPOM, showed constant values. These results are partiality similar to reported in the literature, because the dynamic of transport of OM is relationship with local variations environmental.

Keywords : coarse particulate organic matter; fine particulate organic matter; Gaira River.

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