首页   按字顺浏览 期刊浏览 卷期浏览 Temporal variations of forest floor properties in the Coastal Western Hemlock zone of s...
Temporal variations of forest floor properties in the Coastal Western Hemlock zone of southern British Columbia

 

作者: Jaume Fons,   Karel Klinka,  

 

期刊: Canadian Journal of Forest Research  (NRC Available online 1998)
卷期: Volume 28, issue 4  

页码: 582-590

 

ISSN:0045-5067

 

年代: 1998

 

DOI:10.1139/x98-027

 

出版商: NRC Research Press

 

数据来源: NRC

 

摘要:

We examined temporal changes in the forest floor across a zonal chronosequence represented by four stages of stand development: stand initiation ( <= 7 years after disturbance), stem exclusion ( ±40-year-old stands), understory reinitiation ( ±60-year-old stands), and old-growth (>350-year-old) stands. All stages, except the old-growth, had a similar history of disturbance: clear-cutting without subsequent burning and silvicultural treatments. Considering thickness and chemical and biotic properties of the LF and H horizons, the most dissimilar stages were the stand initiation and old-growth, and the most similar stages were the stem exclusion and understory reinitiation. Compared with the old-growth stage, the stand initiation stage had about the same thickness of LF and H horizons and bacterial biomass but lower acidity, C:N ratio, fungal biomass, and soil fauna density and higher N mineralization. The stem exclusion and understory reinitiation stages had, in general, properties intermediate between the stand initiation and old-growth stage, with a gradual increase in acidity, C:N ratio, and fungal and faunal populations. After clear-cutting, the forest floor showed inevitable qualitative and quantitative alterations in response to the open-area climate. At the same time, it showed resilience, as most faunal groups of the old-growth stage were present in the stand initiation stage.

 

点击下载:  PDF (126KB)



返 回