Amazonian Rain Forests: Ecosystem Disturbance and Recovery - download pdf or read online

By Carl F. Jordan (auth.), Carl F. Jordan (eds.)

ISBN-10: 146124658X

ISBN-13: 9781461246589

ISBN-10: 146129102X

ISBN-13: 9781461291022

DEVELOPMENT AND DISTURBANCE IN AMAZON FORESTS Contrasting Impressions 6 2 The rain forests of the Amazon Basin conceal nearly 5.8 x 10 km (Salati and Vose 1984). Flying over even simply a part of this basin, one gazes hour after hour upon this probably limitless blanket of eco-friendly. The influence of immen­ sity is identical while seen from the Amazon River itself, or from its tributar­ ies. From a hammock at the shaded deck of a riverboat, the immensity of the wooded area provides a big monotony as one view of the coastline blends unnoticeably into one other. From either views, the overpowering response to the ocean of timber that stretches from horizon to horizon is a feeling of the vastness of the rain wooded area. In September 1985, I bought a distinct impact of the rain wooded area. numerous scholars and that i journeyed in a self-propelled vehicle alongside the single-track railroad that stretches nearly a thousand km from the Carajas iron ore mine within the rain woodland of Para country, Brazil, all of the technique to Sao Luis at the coast (Fig. 1.1).

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Extra resources for Amazonian Rain Forests: Ecosystem Disturbance and Recovery

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Soil profile studies showed that litter horizons practically disapper during the life of a chacra, a change attributable to water erosion, wind removal, decomposition, and incorporation into the profile by soil fauna. By the time chacras are abandoned, most trunks and stumps have decomposed partially. The 3-year-old stand of secondary forest had a living biomass of 52 t/ha dry weight and a total biomass including litter, of 65 t/ha. A 10-year-old stand at Gran Pajonal dominated by Cecropia had a live biomass of 89 t/ha and a total biomass of 103 t/ha.

The stock of each component is indicated by the thickness of the respective shaded, clear, or hatched areas. Potassium stocks in the soil were similar in all stands of the chronosequence (Fig. 7). The soil is chiefly quartz, kaolinite, and iron and aluminum oxides, and weathering of these materials will not be an important new source of potassium for the trees. The increase in potassium stocks in the biomass probably came from greater wet and dry atmospheric deposition than leaching from the soil.

9 m 2/ha. 1% of the total was roots. Dry weight of humus on top of the mineral soil surface was almost 50 t/ha. Samples of biomass and soil were taken 50 R. J. Buschbacher for nutrient analysis. Nutrient concentrations were multiplied by the biomass to determine total stocks of nutrients in the uncut forest. Wood productivity was determined by precise measurements of the annual diameter increment of 104 trees, and converting diameter increment into biomass increment with the use of allometric equations.

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Amazonian Rain Forests: Ecosystem Disturbance and Recovery by Carl F. Jordan (auth.), Carl F. Jordan (eds.)

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