However, the access to this highway requires a ferry crossing to Careiro, across the Rio Negro and River Amazon, which takes about 40 minutes, and then is only paved for about another 100km (62mi) to Castanho. Detailed data on biomass and nutrient content of different forest components at "km 64" are available from studies carried out for the International Biological Programme in 1970 (together with data from 116 other forest sites; much of these data are also contained in the IBP Woodlands Data Set maintained by the ORNL DAAC). Model Drivers and Validation Measurements. Biogeochemistry of tropical forests: I. Manaus, Brazil has to be one of the world's major birding crossroads, smack in the middle of the enormous Amazon rainforest, at 5,500,000 km 2 (2,123,562 sq mi ) the richest biome on our planet! ANPP, BNPP, and TNPP values for the "km 64" site reported by various published data sources. This website uses cookies to improve your experience while you navigate through the website. 1973. Site boundaries and descriptions: This data set contains NPP data from five study sites located near Manaus, Brazil. equatorial rainforest with that in a 14-year-old secondary forest. (2001). This relatively low productivity of natural vegetation is believed to reflect the relative poverty in nutrients of the Amazon soils. An example is the mate that is grown in the southern region following the best sustainable practices. Access is by boat. Sample NPP Data Record
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