Abstract

ESQUIVEL, HÉCTOR EDUARDO; TINOCO, FERNANDO  and  TORRES, ALFREDO JOSÉ. Plant succession in the fluvial-volcanic mud from Armero-Tolima-Colombia 30 years after the eruption of the "Nevado del Ruiz" Volcano. Caldasia [online]. 2016, vol.38, n.1, pp.101-116. ISSN 0366-5232.  https://doi.org/10.15446/caldasia.v38n1.57832.

The subject of study was the successional dynamics and the edaphological evolution of a tropical dry forest affected by mud from the "Nevado del Ruiz" volcanic eruption on November 13, 1985. The zone of study is located in the municipality of Armero with an extension of 3500 hectares and 450 m.a.s.l.Ten sampling plots were established  (each 10 x 20 m) in accordance with the IGAC (Instituto GeográficoAgustínCodazzi). The four floristic studies report 565 species in total, distributed in 72 families, from which Asteraceae, Malvaceae, Fabaceae, Euphorbiaceae and Poaceae stand out. The number of species has varied significantly, for the first study, 294 distributed into 66 families, for the second 332 species, for the third study 265 species and for the fourth study a total of 195. The first study helped confirm what Braun Blanquet (1950) states according to the phytosociology that in areas strongly damaged, the strategy of the vegetation initially is to establish itself in mounds. Five years later, the second study shows the associations as follows: Rhynchelytretum, for being governed by grass Rhynchelytrum repens (Will) Hubb., now Melinis repens (Willd.)Zizka the association Indigoferetum for the high presence of Indigofera hirsute Jacq., Panicetum, for the dominance of Panicum maximum Jacq. And the association Ficetum, for the presence of several species of Ficus. The vegetation has presented a constant change and an advanced successional formation dominates the habit of arboreal growth forming forest relic. The ground PH has varied from 3.2 to 6.5 as have several of the elements evaluated.

Keywords : Plant succession; Armero; volcanic mud.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )