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Volumn 303, Issue 5659, 2004, Pages 827-829

48,000 Years of Climate and Forest Change in a Biodiversity Hot Spot

Author keywords

[No Author keywords available]

Indexed keywords

CLIMATOLOGY; COOLING; ECOLOGY; FORESTRY;

EID: 0842331446     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1090795     Document Type: Article
Times cited : (250)

References (30)
  • 3
  • 8
    • 0842265825 scopus 로고    scopus 로고
    • note
    • The persistence of the cloud base forming at about 1350 m was evident in the transition from organic-poor soils to those with a duff layer above this elevation. Rocotal, Kosñipata Valley, Peru, is the closest weather station at approximately the same exposure and elevation on the east Andean slope at 2010 m and 13°06′47″S, 71°34′14″W. The 2-year precipitation average is 5452 mm.
  • 12
    • 0842309134 scopus 로고    scopus 로고
    • note
    • Modern pollen studies indicate that within Neotropical forested settings, pollen representation far from the parent tree is statistically insignificant and that distributions of taxa used in these transfer functions are reflected faithfully in pollen occurrence (27, 28).
  • 13
    • 0842309089 scopus 로고    scopus 로고
    • Searches were conducted using TROPICOS (www. mobot.org/tropicos/spectest7.xml). Nonparametric empirical probability distributions were fit for 26 pollen taxa in S-PLUS 6.1 (Insightful Corp., 2002) and are presented in the supporting online material text. We use modern distributional data from herbarium collections grouped at the same level as observed pollen taxa to estimate the probability of a collection of that taxon coming from a given attitude. Taxa were included in the elevation model for a sample when they exceeded 10% or their maximum representation. Cut-offs of 5 and 15% did not affect the conclusions for the model (29). We first estimated the probability Pr (taxon A I elevation). Bayes' theorem was then used with a uniform prior to estimate the most likely elevation from which a given set of taxa originates, Pr (elevation I taxa A, B, C). This method gives a probability distribution of elevation for a group of observed pollen taxa that can also be used to infer a "paleoelevation" for fossil pollen spectra. Taxa used were: Alchornea, Alnus, Alsophylla, Begonia, Bocconia, Celtis, Clethra, Cyathea, Cystopteris, Dictyocaryum, Gaiadendron, Hedyosmum, Hyeronima, Ilex, Juglans, Myrica, Myrsine, Piper, Podocarpus, Polylepis, Symplocos, Trema, Vallea, Weinmannia, Wettinia, and Zanthoxylum.
  • 14
    • 0842330638 scopus 로고    scopus 로고
    • note
    • Measurement of the adiabatic lapse rate of local moist air is based on an elevational transect of dataloggers in the nearby forests of the Kosñipata Valley, Peru, that measured temperature and humidity over an 8-month period.
  • 15
    • 0035825657 scopus 로고    scopus 로고
    • P. A. Baker et al., Nature 409, 698 (2001).
    • (2001) Nature , vol.409 , pp. 698
    • Baker, P.A.1
  • 16
    • 0842287475 scopus 로고    scopus 로고
    • note
    • The compositional dissimilarity assumes that the maximum wet season (December-January-February) insolation equates with periods of maximum precipitation.
  • 22
    • 0842287479 scopus 로고
    • thesis, University of Amsterdam
    • R. A. J. Grabandt, thesis, University of Amsterdam (1985).
    • (1985)
    • Grabandt, R.A.J.1
  • 23
    • 0035951464 scopus 로고    scopus 로고
    • P. A. Baker et al., Science 291, 640 (2001).
    • (2001) Science , vol.291 , pp. 640
    • Baker, P.A.1
  • 30
    • 0842265822 scopus 로고    scopus 로고
    • Supported by grants from NSF (DEB-0237573, -0237684, and -9732951)
    • Supported by grants from NSF (DEB-0237573, -0237684, and -9732951).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.