Variation in environmental conditions, understorey species number, abundance and composition among natural and managed Picea abies forest stands

Økland, Tonje; Rydgren, Knut; Økland, Rune Halvorsen; Storaunet, Ken Olaf; Rolstad, Jørund

doi:10.1016/s0378-1127(02)00331-6

Cited by 92 publications

(44 citation statements)

References 56 publications

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“…We studied the bryophyte community in large plots compared to most other studies on bryophytes (e.g., Vellak and Paal 1999, Fenton et al 2003, Økland et al 2003, who used 0.04-1.25 m 2 plots, but see Frisvoll andPrestø 1997 andPharo andBeattie 1997, who used 100-1000 m 2 plots). The change at the 200-m 2 scale was often more pronounced than at the 1000-m 2 scale (Figs.…”

Section: Discussionmentioning

confidence: 99%

Substrate Form Determines the Fate of Bryophytes in Riparian Buffer Strips

Hylander

Dynesius

Jonsson

et al. 2005

Ecological Applications

116

123

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Substrate form determines the fate of bryophytes in riparian buffer strips.Ecological Applications, http://dx.doi.org/10.1890/04-0570Access to the published version may require subscription. N.B. When citing this work, cite the original published paper. Abstract. Studies on the effectiveness of forest buffer strips left along streams after logging have long overlooked the biota of the buffers themselves, despite their high species richness. We investigated mosses and liverworts (bryophytes), abundant and species-rich groups in boreal forests, before and 2.5 years after logging along 15 small streams. In each site, two 1000-m 2 (20 ϫ 50 m) plots along the stream were inventoried; one plot in an area subjected to clear-cutting, and another in a buffer strip (10 m wide on each side of the stream). Ten plots along small streams in forest reserves in the same region were used as references. We found that less than half as many bryophyte species per plot disappeared after logging in the buffer strips compared to the clearcuts. The changes in bryophyte cover and in species composition were smaller in the buffer strips, and the species that were negatively affected in the clearcuts were less affected in the buffer strips. However, there was a significant change in species composition in the buffer strips compared to the references. Substrate form and taxonomic group were important factors in understanding this turnover. Many species growing on substrates with a convex form (e.g., logs, tree bases, and mesic ground) decreased or disappeared, while species on concave substrates were rather unaffected. This held for both mosses and liverworts, although liverworts were generally more sensitive than mosses. The difference in response of assemblages on convex vs. concave substrates makes changes in microclimate due to logging a likely explanation. The species in most need of protection (i.e., the red-listed species) were among the ones with strongest declines in the 20 m wide buffer strips. In order to function optimally for bryophyte conservation, forests along small streams need to be protected from high windthrow frequency and strong edge effects. Increasing the width of buffer strips at sites with known or potential values (e.g., large amounts of woody debris or boulders) should be considered a better strategy than using narrow buffer strips with a fixed width.

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Section: Discussionmentioning

confidence: 99%

Substrate Form Determines the Fate of Bryophytes in Riparian Buffer Strips

Hylander

Dynesius

Jonsson

et al. 2005

Ecological Applications

116

123

View full text Add to dashboard Cite

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“…Previous studies have shown that aspect, through its impact on microclimate, influences the spatial distribution of vascular plants (e.g., Cantlon 1953, Bale et al 1998, Olivero and Hix 1998. However, the effects on bryophytes have received less attention and earlier studies have been restricted to few sites or small plots (Cantlon 1953, So¨derstro¨m 1981, Økland et al 2003. Site sparsity reduces the generality of results and small grain size only allows studies of a fraction of the local species pool.…”

Section: Introductionmentioning

confidence: 99%

Slope Aspect Modifies Community Responses to Clear-Cutting in Boreal Forests

Åström

Dynesius

Hylander³

2007

Ecology

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Slope aspect modifies community responses to clear-cutting in boreal forests. Abstract. Slope aspect modifies microclimate and influences ecological processes and spatial distribution of species across forest landscapes, but the impact of slope aspect on community responses to disturbance is poorly understood. Such insight is necessary to understand landscape community dynamics and resilience. We compared bryophyte (liverworts and mosses) communities in matched 0.02-ha plots of four boreal stand types in central Sweden: recently clear-felled and mature stands dominated by Norway spruce in southfacing and north-facing slopes. Differences between forests and clear-cuts were interpreted as effects of clear-cutting, and differences between south-and north-facing slopes as effects of aspect. In response to clear-cutting, bryophyte cover and composition changed more in southfacing slopes. Only one out of ten significantly declining species in south-facing slopes also declined significantly in north-facing slopes. North-facing slopes lost fewer bryophyte species, and among those, fewer forest species and fewer species associated with wood and bark. In north-facing slopes, the average proportions of mosses and liverworts shared between the forest and the clear-cut plot were 88% and 74%, respectively. Corresponding numbers for south-facing slopes were 79% and 33%. In addition, more bryophyte species were added in north-than south-facing slopes after clear-cutting, somewhat reducing the difference in compositional change between aspects. South-and north-facing mature forests differed in species composition, mostly due to higher richness of mosses in south-facing slopes. The smaller changes in bryophyte communities on north-facing slopes in response to clear-cutting have implications for ecosystem dynamics and management as high local survival may enhance landscape-level resilience. Ecology

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“…Increasingly, snags have been studied in managed forests to determine snag dynamics, longevity, and recruitment (Stephens 2004, Chambers and Mast 2005, Ganey and Vojta 2005, effects of slope aspect, edaphic factors, and topography (Gale 2000, Clark et al 2002, Økland et al 2003, changes in abundance with latitude (Gibbs et al 1993), and nitrogen and carbon storage and decomposition (Yatskov et al 2003, Creed et al 2004, Kupferschmmid and Bugmann 2005. In addition, snags in managed forests provide important habitat for cavity-nesting birds (Ganey and Vojta 2004, Chambers and Mast 2005, Spiering and Knight 2005, breeding birds (Greenberg and Lanham 2001), and other fauna that use hollows in trees (Gibbons et al 2002, Lindhe et al 2005.…”

Section: Introductionmentioning

confidence: 99%

Snag abundance and species composition in a managed forest landscape in central Japan composed of Larix kaempferi plantations and secondary broadleaf forests

Nagaike¹

2009

Silva Fenn.

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Larix kaempferi is the main plantation species in the low-snow, cool-temperate zone of Japan. I studied L. kaempferi plantations of various stand ages in central Japan to examine and compare the effect of stand age on the abundance, size, and species composition of snags (standing dead trees) compared to those in secondary broadleaf forests. Plantations that were older than the standard rotation age had more and larger snags than young plantations, and the species diversity of snags was positively correlated with stand age. Because the density of living planted L. kaempferi showed little correlation with snag variables, whereas that of naturally regenerated tree species was positively correlated with snag variables, the density dependence of snag occurrence was stronger in naturally regenerated trees than in planted L. kaempferi. Snag species that were positively correlated with stand age were the main species in secondary broadleaf forests in this area. Basal area, density, and number of species of snags in standard-rotation plantations were significantly lower than in long-rotation plantations and secondary broadleaf forests. Long-rotation plantations are useful for retaining snags compared to standard-rotation plantations.

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Variation in environmental conditions, understorey species number, abundance and composition among natural and managed Picea abies forest stands

Cited by 92 publications

References 56 publications

Substrate Form Determines the Fate of Bryophytes in Riparian Buffer Strips

Substrate Form Determines the Fate of Bryophytes in Riparian Buffer Strips

Slope Aspect Modifies Community Responses to Clear-Cutting in Boreal Forests

Snag abundance and species composition in a managed forest landscape in central Japan composed of Larix kaempferi plantations and secondary broadleaf forests

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