1974
DOI: 10.2307/2937031
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The Export of Nutrients and Recovery of Stable Conditions Following Deforestation at Hubbard Brook

Abstract: We report the effects of deforestation on the export of particulate matter, erodibility of the ecosystem, and the relative importance of dissolved substances and particulate matter in exported materials. The mature forested ecosystem is little affected by erosion, with an average annual particulate matter export of only 2.5 MT (metric tons) km—2 yr—1. Deforestation and repression of growth for 3 yr increased export to a maximum of 38 MT km—2 yr—1, but the increase in export was exponential with rather minor in… Show more

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Cited by 275 publications
(119 citation statements)
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“…Nitrate export to stream water increases after deforestation because of reduced plant uptake, and increased rates of N mineralization and nitrification in upland soils (1, 4). Dramatic increases in streamwater NO 3 Ϫ fluxes followed whole watershed deforestation experiments in 1965-1968, 1974 -1976 , and 1983. Despite differences in the severity of the deforestation treatment, all watersheds showed a similar pattern of nitrogen loss (3, 5).…”
mentioning
confidence: 99%
“…Nitrate export to stream water increases after deforestation because of reduced plant uptake, and increased rates of N mineralization and nitrification in upland soils (1, 4). Dramatic increases in streamwater NO 3 Ϫ fluxes followed whole watershed deforestation experiments in 1965-1968, 1974 -1976 , and 1983. Despite differences in the severity of the deforestation treatment, all watersheds showed a similar pattern of nitrogen loss (3, 5).…”
mentioning
confidence: 99%
“…increasing catchment stability), average OCAR in NLF lakes has continued to increase (ca 2000 mean % 25 g C m -2 yr -1 ) and has not returned to pre-disturbance levels (ca 1850 % 12 g C m -2 yr -1 ). Catchment carbon and nutrient dynamics change as forests recover from disturbance [22], influencing element export [23]. That the OCAR in the NLF has not declined may indicate that catchment stabilization is not yet complete and/or there is continued nutrient export that would support in-lake production.…”
Section: Discussionmentioning
confidence: 99%
“…However, the size and number of experiments that are needed is unprecedented in ecology. Past ecosystem-level experiments have typically involved few treatments and no replications (e.g., Bormann et al 1974, Wright et al 1988), but the CO 2 /climate problem dictates a more complex approach. We need to evaluate the effects of rising CO 2 and temperature change both alone and in combination.…”
Section: The Need For Experiments On Ecosystemsmentioning
confidence: 99%