Advertisement

Oecologia

, Volume 123, Issue 3, pp 342–349 | Cite as

Soil phosphorus fractionation and phosphorus-use efficiencies of tropical rainforests along altitudinal gradients of Mount Kinabalu, Borneo

  • K. Kitayama
  • N. Majalap-Lee
  • S. Aiba

Abstract 

We studied soil phosphorus (P) fractionation and P-use efficiencies (PUEs) of rainforests along altitudinal gradients (700–3100 m) on two types of parental rocks (sedimentary versus ultrabasic) on Mount Kinabalu, Borneo. Sedimentary rocks were known to contain more quartz (which does not adsorb P) than ultrabasic rocks. The pool (top 30 cm) of total P was always greater on sedimentary (ranging from 34.9 to 72.6 g m–2) than on ultrabasic (9.0–29.2 g m–2) rocks at comparable altitudes. Accordingly, the pools of organic P and labile inorganic P were always greater on sedimentary than on ultrabasic rocks. The pool of primary mineral, calcium P increased upslope from 1.7 to 4.3 g m–2 on sedimentary rock, suggesting that the altitudinal sequence of the sites reflected a decreasing magnitude of soil weathering upslope. The pool of calcium P on ultrabasic rock did not vary consistently with altitude (1.2–2.8 g m–2), probably reflecting the greater between-site variability of primary mineral P in parent rocks. When all sites were compared, the pool of most labile, bicarbonate-extracted inorganic P increased (ranging from 0.02 to 1.85 g m–2) with increasing calcium P. Calcium P was therefore considered to be an important P source to the biota on Kinabalu. Gross patterns in the variation of PUE (indexed as the reciprocal of the P concentration in litter) were best explained by the pool size of actively cycling P (total P minus occluded inorganic P). PUE, however, demonstrated distinct altitudinal patterns to generate an intricate conrol of P use pattern by soil P pools and altitude.

Key words Ecosystem control Litterfall Nutrient-use efficiency Parent materials Soil phosphorus fractionation 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • K. Kitayama
    • 1
  • N. Majalap-Lee
    • 2
  • S. Aiba
    • 3
  1. 1.Japanese Forestry and Forest Products Research Institute, P.O. Box 16, Tsukuba Norin Kenkyu Danchi, Ibaraki 305-8687, Japan e-mail: kanehiro@ffpri.affrc.go.jp Tel.: +81-298-733211, Fax: +81-248-731541JP
  2. 2.Forest Research Center, Forestry Department, P.O. Box 1407, 90715 Sandakan, Sabah, MalaysiaMY
  3. 3.Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060, JapanJP

Personalised recommendations