GAP CHARACTERISTICS AND REPLACEMENT PATTERNS IN THE KNYSNA FOREST, SOUTH-AFRICA

被引：40

作者：

MIDGLEY, JJ ^{[1
]}

CAMERON, MC ^{[1
]}

BOND, WJ ^{[1
]}

机构：

[1] CSIR FORESTEK,STELLENBOSCH 7600,SOUTH AFRICA

来源：

JOURNAL OF VEGETATION SCIENCE | 1995年 / 6卷 / 01期

关键词：

FOREST DYNAMICS; GAP FORMATION; GAP-MAKER;

D O I：

10.2307/3236253

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

We investigated gap formation and gap replacement in the Knysna Forest. Most (70%) trees died standing, most gaps were small (median gap size of 35 m(2); Gap diameter/Canopy height ratio of 0.24) and were formed by a single dead individual. No large differences were found among the more common species in terms of the size of gaps they created when they died or in the size of gaps they colonised. This is probably because the more common species are shade tolerant and they established before the gaps were formed. Regenerating individuals were almost never found on root mounds in pits or on logs. There were no indications of specific replacement patterns. In contrast, random replacement appears to be the dominant pattern for the more common species. Overall successional patterns suggest that the forest is relatively stable. We conclude that the gaps/non-gaps paradigm is not as useful as a lottery paradigm for explaining gap dynamics in the Knysna Forest.

引用

页码：29 / 36

页数：8

共 25 条

[1] Barden L.S., Repeatability in forest gap research: Studies in the Great Smoky Mountains, Ecology, 70, pp. 558-559, (1989)
[2] Bond P., Goldblatt P., Plants of the Cape Flora — a descriptive catalogue, J. S. Afr. Bot. Suppl., 13, pp. 1-455, (1984)
[3] Chesson P.L., Environmental variation and the coexistence of species, Community Ecology, pp. 240-256, (1986)
[4] Connell J.H., Some processes affecting the species composition in forest gaps, Ecology, 70, pp. 560-562, (1989)
[5] Geldenhuys C.J., Maliepaard W., The causes and sizes of canopy gaps in the Southern Cape forests, S. Afr. For. J., 124, pp. 50-57, (1983)
[6] Horn H.S., Markovian properties of forest succession, Ecology and Evolution of Communities, pp. 196-211, (1975)
[7] Hubbell S.P., Foster R.B., Canopy gaps and the dynamics of a neotropical forest, Plant Ecology, pp. 77-96, (1986)
[8] Lertzman K.P., Patterns of gap‐phase replacement in a sub‐alpine, old‐growth forest, Ecology, 70, pp. 657-669, (1992)
[9] Lertzman K.P., Krebbs C.J., Gap‐phase structure of a sub‐alpine old growth forest, Can. J. For. Res., 21, pp. 1730-1741, (1991)
[10] Lieberman M., Lieberman D., Peralta R., Forests are just not Swiss cheese: Canopy stereogeometry of non‐gaps in tropical forests, Ecology, 70, pp. 550-552, (1989)

← 1 2 3 →