Aboveground Net Primary Production and Leaf-Area Index in Early Postfire Vegetation in Yellowstone National Park |
| |
Authors: | Rebecca A Reed Mary Ellen Finley William H Romme Monica G Turner |
| |
Institution: | (1) Department of Zoology, Birge Hall, University of Wisconsin, Madison, Wisconsin 53706 , US;(2) Department of Biology, Fort Lewis College, Durango, Colorado 81301, USA , US |
| |
Abstract: | Aboveground net primary production (ANPP) and leaf-area index (LAI) of lodgepole pine (Pinus contorta var. latifolia Engelm. ex Wats.) saplings and aboveground productivity of herbaceous vegetation components were determined 9 years after
the 1988 fires in Yellowstone National Park (YNP). Measurements were made in four sites representing a wide range of early
postfire vegetation present in YNP, including high-density lodgepole pine, low-density lodgepole pine, and two nonforest stands.
LAI of the pine saplings and total ANPP (trees plus herbs) generally increased with increasing sapling density, from 0.002
m2 m−
2 and 0.25 Mg ha−
1 year−
1 in the infertile nonforest stand (100 pine saplings ha−
1) to 1.8 m2 m−
2 and 4.01 Mg ha−
1 year−
1 in the high-density pine stand (62,800 saplings ha−
1). Aboveground herbaceous productivity was not strongly correlated with sapling density, but appeared to be influenced by
soil fertility. In the high-density pine stand, tree ANPP and LAI were within the lower range of values reported for similar
mature coniferous forests. This finding suggests that at least some ecosystem processes (related to ANPP and LAI) may have
nearly recovered after only 9 years of postfire succession, in at least some of the young forests developing after the 1988
Yellowstone fires.
Received 7 April 1998; accepted 1 December 1998. |
| |
Keywords: | : lodgepole pine Yellowstone National Park succession fire aboveground net primary production leaf-area index |
本文献已被 SpringerLink 等数据库收录! |
|