Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Nitrogen and Phosphorus Availability in Treefall Gaps of a Lowland Tropical Rainforest

Peter M. Vitousek and Julie S. Denslow
Journal of Ecology
Vol. 74, No. 4 (Dec., 1986), pp. 1167-1178
DOI: 10.2307/2260241
Stable URL: http://www.jstor.org/stable/2260241
Page Count: 12
  • Read Online (Free)
  • Download ($18.00)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Nitrogen and Phosphorus Availability in Treefall Gaps of a Lowland Tropical Rainforest
Preview not available

Abstract

(1) Nitrogen availability (net nitrogen mineralization) was extremely high in a lowland rainforest on volcanic soil at La Selva, Costa Rica, averaging 50-80 μ g g-1 month-1 (822 kg ha-1 year-1). Available phosphorus concentrations were relatively low (2.5 μ g g-1). (2) Nitrogen mineralization did not increase in the crown-fall zone of treefall gaps, although the possibility of a short-lived increase immediately after treefall could not be ruled out. Phosphorus concentrations increased slightly but not significantly (to 3.3 μ g g-1). (3) The root-throw zone of treefall gaps had significantly lower nitrogen mineralization and phosphorus concentrations than the crown-fall zone or the zone along the fallen trunk. Low nutrient availability in the root-throw zone could select for colonizing species distinct from those establishing in other zones of treefall gaps.

Page Thumbnails

  • Thumbnail: Page 
1167
    1167
  • Thumbnail: Page 
1168
    1168
  • Thumbnail: Page 
1169
    1169
  • Thumbnail: Page 
1170
    1170
  • Thumbnail: Page 
1171
    1171
  • Thumbnail: Page 
1172
    1172
  • Thumbnail: Page 
1173
    1173
  • Thumbnail: Page 
1174
    1174
  • Thumbnail: Page 
1175
    1175
  • Thumbnail: Page 
1176
    1176
  • Thumbnail: Page 
1177
    1177
  • Thumbnail: Page 
1178
    1178