The importance of coarse woody debris for vascular plants in temperate mixed deciduous forests

被引:40
作者
Checko, Ewa [1 ]
Jaroszewicz, Bogdan [1 ]
Olejniczak, Katarzyna [1 ]
Kwiatkowska-Falinska, Anna J. [1 ]
机构
[1] Univ Warsaw, Fac Biol, Bialowieza Geobot Stn, PL-17230 Bialowieza, Poland
关键词
forest ecology; disturbances; species richness; natural forest; tree regeneration; COLONIZATION PATTERNS; DECOMPOSITION RATES; DECAYING LOGS; BOREAL; REGENERATION; SEEDLINGS;
D O I
10.1139/cjfr-2014-0473
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
Deadwood in various stages of decomposition and diverse spatial arrangements provides habitat for numerous organisms. However, knowledge on the colonization of deadwood by vascular plants in mixed deciduous forests is insufficient. We carried out our study in an oak-lime-hornbeam forest in northeastern Poland. Downed logs were colonized by 49 vascular plant species, a number higher than reported from any other type of forest. Species richness and abundance of plants increased with log diameter and decomposition. The former was higher on broadleaf deadwood than on coniferous deadwood (46 vs. 38 species). The frequency and abundance on logs were higher for small-seeded plants (<1 mg) than for bigger, heavier seeded plants. Deadwood surface served as an ecological filter, keeping small seeds in cracks, but allowing bigger seeds to roll down. Tree seedling density increased with wood decomposition. However, for eight of nine species, it was higher on the ground than on deadwood. Only spruce seedlings were recorded almost exclusively on deadwood, constituting a crucial substrate for spruce regeneration in meso-eutrophic forests. Therefore, we stress the importance of constant deadwood supply, on the scale of decades, to ensure the diversity of this substrate and to allow the natural dynamics of deadwood-dependent species populations.
引用
收藏
页码:1154 / 1163
页数:10
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