Biogeochemistry of bristlecone pine (Pinus aristata) at treeline
Conference
·
· Bulletin of the Ecological Society of America; (United States)
OSTI ID:7162972
- Univ. of Denver, CO (United States)
Treeline along the front range in Colorado has shifted numerous times during the Holocene and the stems of bristlecone pine persevere in fossil stands above the present limit of tree survival. Bristlecone pine are also interesting because live foliage persist for up to 25 years. We measured foliage nutrient composition of different aged leaves, and also soil nitrogen and phosphorous fractions along an elevation transect in present day stands, and soil N and P fractions that are within fossil (800 yr BP) stands. Foliage N and P vary systematically according to elevation with nitrogen abundance increasing up-slope. Individual trees also show a marked island effect with both N and P soil content highest adjacent to stems. For stems in fossil stands, the island effect has persisted but only for some P fractions but not for nitrogen. Recent trends in foliar N and P contents are discussed in terms of anthropogenic nitrogen saturation at high elevation along the front range in Colorado.
- OSTI ID:
- 7162972
- Report Number(s):
- CONF-940894--
- Conference Information:
- Journal Name: Bulletin of the Ecological Society of America; (United States) Journal Volume: 75:2
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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·
OSTI ID:6946752
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Conference
·
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· Bulletin of the Ecological Society of America; (United States)
·
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Conference
·
Sat Dec 31 23:00:00 EST 1983
·
OSTI ID:5675384
Related Subjects
550000* -- Biomedical Sciences
Basic Studies
560300 -- Chemicals Metabolism & Toxicology
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOGEOCHEMISTRY
CHEMISTRY
COLORADO
CONIFERS
DEVELOPED COUNTRIES
ECOLOGICAL CONCENTRATION
ELEMENTS
GEOCHEMISTRY
LEAVES
NITROGEN
NONMETALS
NORTH AMERICA
PHOSPHORUS
PINES
PINOPHYTA
PLANTS
TREES
USA
Basic Studies
560300 -- Chemicals Metabolism & Toxicology
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOGEOCHEMISTRY
CHEMISTRY
COLORADO
CONIFERS
DEVELOPED COUNTRIES
ECOLOGICAL CONCENTRATION
ELEMENTS
GEOCHEMISTRY
LEAVES
NITROGEN
NONMETALS
NORTH AMERICA
PHOSPHORUS
PINES
PINOPHYTA
PLANTS
TREES
USA