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Turning back the harmful red tide (1997)

Anderson, Donald M.

[s.l.] : Macmillan Magazines Ltd.

Nature 388 (1997), S. 513-514

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ISSN: 1476-4687

Source: Nature Archives 1869 - 2009

Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics

Notes: [Auszug] ...Each holiday season I await the visit of one relative with trepidation. Years ago he asked whether I had “stopped that red tide problem yet?” — a simple question from one convinced that science solves problems directed to a so-called expert on the destructive and often visible ...

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1038/388513a0

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Paradise Threatened: Land Use and Erosion on St. John, US Virgin Islands (1997)

Macdonald, Lee H. ; Anderson, Donald M. ; Dietrich, William E.

Springer

Environmental management 21 (1997), S. 851-863

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ISSN: 1432-1009

Keywords: KEY WORDS: Erosion; Sediment yield; Roads; Dry tropics; Development

Source: Springer Online Journal Archives 1860-2000

Topics: Energy, Environment Protection, Nuclear Power Engineering

Notes: 2 /yr, respectively. Geomorphic evidence indicates that plantation agriculture during the 18th and 19th centuries did not cause severe erosion. Since about 1950 there has been rapid growth in roads and development due to increasing tourism and second-home development. Our field investigations identified the approximately 50 km of unpaved roads as the primary source of anthropogenic sediment. Field measurements of the road network in two catchments led to the development of a vector-based GIS model to predict road surface erosion and sediment delivery. We estimate that road erosion has caused at least a fourfold increase in island-wide sediment yields and that current sedimentation rates are unprecedented. Paving the dirt roads and implementing standard sediment control practices can greatly reduce current sediment yields and possible adverse effects on the marine ecosystems surrounding St. John.