Feedback regulation of constant leaf standing crop in Sasa tsuboiana grasslands

Authors
Citation
Y. Konno, Feedback regulation of constant leaf standing crop in Sasa tsuboiana grasslands, ECOL RES, 16(3), 2001, pp. 459-469
Citations number
45
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
ECOLOGICAL RESEARCH
ISSN journal
0912-3814 → ACNP
Volume
16
Issue
3
Year of publication
2001
Pages
459 - 469
Database
ISI
SICI code
0912-3814(200109)16:3<459:FROCLS>2.0.ZU;2-7
Abstract
The standing crop of current leaves of Sasa tsuboiana was measured on the u pper slopes of Mount Horai, Shiga prefecture, central Japan. Upper one-year -old branches in the canopy produced greater mass of current leaves than lo wer ones. Furthermore, culms in artificially thinned plots produced larger leaf mass per culm than those in control plots. These results reveal that l eaf production is positively correlated with light intensity. Therefore, wh en the leaf standing crop in a given year is somewhat smaller than usual, i t may increase in the following year because the branches will receive stro nger light. This feedback regulation causes uniformity in the horizontal di stribution of the leaf standing crop. The constancy of the leaf standing cr op throughout dense stands of different heights indicates that a common equ ilibrium value of the leaf standing crop exists. This uniform distribution leads to an almost-uniform weak light intensity under the canopy of S. tsub oiana, and can consequently exclude other plant species.