Availability and Structure of Coarse Woody Debris in Hemiboreal Mature to Old-Growth Aspen Stands and Its Implications for Forest Carbon Pool

被引:6
|
作者
Senhofa, Silva [1 ]
Snepsts, Guntars [1 ]
Bickovskis, Karlis [1 ]
Jaunslaviete, Ieva [1 ]
Liepa, Liga [2 ]
Straupe, Inga [2 ]
Jansons, Aris [1 ]
机构
[1] Latvian State Forest Res Inst Silava, Rigas St 111, LV-2169 Salaspils, Latvia
[2] Latvia Univ Life Sci & Technol, Forest Fac, Liela St 2, LV-3001 Jelgava, Latvia
来源
FORESTS | 2021年 / 12卷 / 07期
关键词
aspen senescence; carbon pool; deadwood; decline; overmature; Populus tremula; DEAD WOOD; BOREAL FORESTS; NORWAY SPRUCE; SAPROXYLIC BEETLES; SCOTS PINE; DECOMPOSITION; ECOSYSTEM; CHRONOSEQUENCE; REGENERATION; TEMPERATE;
D O I
10.3390/f12070901
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
European aspen deadwood is extensively studied as a habitat for saproxylic species, while less is known of its dynamics and role in carbon sequestration. We studied unmanaged mature (41-60 years), moderately overmature (61-80 years), overmature (81-100 years), and old-growth (101-140 years) and managed mature and moderately overmature aspen stands on fertile mineral soils. In unmanaged stands, marginal mean CWD volume was from 67.3 +/- 12.1 m(3) ha(-1) in moderately overmature to 92.4 +/- 5.1 m(3) ha(-1) in old-growth stands, with corresponding marginal mean CWD carbon pool 8.2 +/- 1.6 t ha(-1) and 12.5 +/- 0.7 t ha(-1) (all p > 0.05), respectively. High CWD volume was present in most stands, by at least two-thirds of plots comprising more than 20 m(3) ha(-1), and about half of CWD was larger than 30 cm in diameter. Changes in CWD species composition toward a higher proportion of deciduous deadwood in old-growth stands, together with a high volume of recently dead trees, suggest early senescence of the dominant aspen cohort.
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页数:16
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