Document Type

Article

Publication details

Nebel, G, Kvist, LP, Vanclay, JK & Vidaurre, H 2000, 'Dinamica de los bosques de la llanura aluvial inundable de la Amazonia Peruana: efectos de las perturbaciones e implicancias para su manejo y conservacionacion', Folia Amazonica, vol. 11, no. 1-2, pp. 65-97.

The publisher's version of this article is available online at http://www.iiap.org.pe/Upload/Publicacion/Folia11_articulo4.pdf

Abstract

Forest dynamics was studied from 1993 to 1997 for individuals > 10 cm DBH in nine one-hectare permanent sample plots. They were established in natural flood plain forests located on the lower Ucayali river in the Peruvian Amazon. After inventories of three plots in each of three forest types, a light and a heavy felling treatment were applied to each of two plots, while a third plot was kept untreated. Average annual stem mortality and recruitment rates in the untreated plots were among the highest observed in neotropical rain forests: mortality 2.20-3.16 %/year, recruitment 2.99-4.57 %/year. Dead individuals significantly deviated from random dispersion towards clumping. The average annual basal area growth was around 1 m2/ha/year, corresponding to average annual basal area growth rates of 3.5-3.8 %/year in the untreated plots. No decrease in basal area growth was observed even in the treated plots where up to 35% of the original stand basal area died during the first year. The average diameter growth increased from 4.0-4.5 mm/year in the untreated plots to 5.3-6.8 mm/year in the treated plots. The stocking of commercial timber species was high with basal areas of 2.6-10.0 m2/ha and volumes of 59-240 m3/ha. The corresponding growth of basal area and volume of commercial timber species were also considerable, reaching values of 0.1-0.3 m2/ha/year and 2-9 m3/ha/year, respectively. Likewise, the mean DBH increment of the timber species was 3.9-9.0 mm/year, showing the highest figures in treated plots. These attributes suggested that forest management for timber production in these forests can be flexible and provide relatively high yields on a sustained basis. Several special biological and technical features of the forests were identified, and their implications for management and conservation were discussed.

Additional information

Original title: “Forest dynamics in flood plain forest in the Peruvian Amazon: effects of disturbance and implications for management and conservation”.

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