Differences in litter cover and understorey flora between stands of introduced lodgepole pine and native Scots pine in Sweden

Engelmark, Ola; Cory, Johanna; Forsslund, Annika; Carlborg, Elisabet

doi:10.1016/j.foreco.2007.12.012

Cited by 29 publications

(24 citation statements)

References 26 publications

(25 reference statements)

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“…We found that the total vascular plant cover increased with stand age for P. contorta, which contrasts to Nilsson et al (2008) who found no such correlation. found that in managed P. abies stands, dwarf shrubs increased their cover for up to at least 80-100 years, and that herbs had a relatively constant cover, which correspond well to our study where vascular plants increased throughout the chronosequence.…”

Section: Discussioncontrasting

confidence: 99%

“…This was evident in stands of P. sylvestris in our study, but not in stands of P. con-torta and P. abies. Lichen cover in stands of both P. contorta and P. sylvestris has been reported to increase with increasing stand age in middle and northern boreal Sweden (Nilsson et al 2008), but we found no significant age effect. In naturally developed pine-lichen woodlands, lichen ground cover can increase with age whereas in more productive forests where lichens are subordinate (as in our study), such response is less likely (Coxon and Marsh 2001).…”

Section: Discussioncontrasting

confidence: 87%

“…has been planted widely outside its native North American distribution range (Sykes 2001). Despite the fact that the regional introduction of P. contorta has been substantial, the understanding of its consequences for native biota is limited (but see: Nilsson et al 2008;Roberge and Stenbacka 2014). In Sweden it is now the third most common conifer after the native Pinus sylvestris L. and Picea abies (L.) H.…”

Section: Introductionmentioning

confidence: 99%

“…Karst., and constitutes 1.2% of the total standing tree volume (Skogsstyrelsen 2014), In comparison to the native P. sylvestris, P. contorta allocate more of the aboveground biomass to needle production (Ågren and Knecht 2001) and reach canopy closure and limited light conditions at an earlier age (Elfving et al 2001). P. contorta also produces more litter (Nilsson et al 2008) with lower nitrogen and higher lignin concentrations than P. sylvestris, resulting in slower decomposition rates (Ågren and Knecht 2001). These differences suggest that species composition and cover of ground vegetation will undergo substantial change in areas were P. contorta have replaced the native conifers.…”

Section: Introductionmentioning

confidence: 99%

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Composition of functional groups of ground vegetation differ between planted stands of non-native Pinus contorta and native Pinus sylvestris and Picea abies in northern Sweden

Bäcklund¹,

Jönsson²,

Strengbom³

et al. 2015

Silva Fenn.

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Composition of functional groups of ground vegetation differ between planted stands of non-native Pinus contorta and native Pinus sylvestris and Picea abies in northern SwedenBäcklund S., Jönsson M.T., Strengbom J., Thor G. (2015). Composition of functional groups of ground vegetation differ between planted stands of non-native Pinus contorta and native Pinus sylvestris and Picea abies in northern Sweden. Silva Fennica vol. 49 no. 2 article id 1321. 10 p. Highlights• Differences in ground vegetation patterns can be linked to tree species, forest stand age and differences in canopy cover.• Vascular plant cover was higher in stands of P. contorta than in stands of both native tree species.• The overall differences and similarities between P. contorta and the two native conifers were not consistent over the different age classes. AbstractIntensified forestry increases the interest in replacing native tree species with fast growing nonnative species. However, consequences for native biodiversity and ecosystem functioning are poorly understood. We compared cover and composition of major functional groups of ground vegetation between planted stands of non-native Pinus contorta Dougl. var. latifolia Engelm. and native conifers Pinus sylvestris L. and Picea abies (L.) H. Karst. in northern boreal Sweden. We quantified the ground cover of lichens, bryophytes, vascular plants and ground without vegetation (bare ground) in 96 stands covering three different age classes (15, 30 and 85 years old). Our study revealed differences in ground vegetation patterns between non-native and native managed forests, and that these differences are linked to stand age and differences in canopy cover. Total vascular plant cover increased with increasing stand age for all tree species, with P. contorta stands having higher cover than both native conifers. The ground cover of lichens was, although generally low, highest in stands of Pinus sylvestris. P. abies stands had a lower cover of vascular plants, but bare ground was more common compared with P. contorta. Our results suggest that the use of P. contorta as an alternative tree species in Fennoscandian forestry will influence native ground vegetation patterns. This influence is likely to change with time and future research should consider both temporal and landscape-scale effects from shifting tree-species dominance to Pinus contorta and other non-native tree species.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussioncontrasting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Composition of functional groups of ground vegetation differ between planted stands of non-native Pinus contorta and native Pinus sylvestris and Picea abies in northern Sweden

Bäcklund¹,

Jönsson²,

Strengbom³

et al. 2015

Silva Fenn.

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“…P. contorta stands tend to have a denser canopy and thus a more shaded environment than P. sylvestris stands (Elfving et al 2001). Nilsson et al (2008) did not find differences in understorey species composition between P. contorta and P. sylvestris stands. However, P. contorta stands had more than three times more needle litter cover on the ground, which can suppress the growth of lichens there.…”

Section: Forest Regeneration and Young Forestsmentioning

confidence: 65%

Effects of Modern Forest Management on Winter Grazing Resources for Reindeer in Sweden

Kivinen

Moen

Berg

et al. 2010

AMBIO

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Boreal forests in Sweden are exploited in a number of ways, including forestry and reindeer husbandry. In the winter, reindeer feed mainly on lichens, and lichen-rich forests are a key resource in the herding system. Commercial forestry has mainly negative effects on reindeer husbandry, and conflicts between these two industries have escalated over the last century. This article reviews the effects of modern forest management practices on the winter resources available for reindeer husbandry. Forestry affects reindeer husbandry at both the stand level and the landscape level and over various time scales. Clear-cutting, site preparation, fertilization, short rotation times, and forest fragmentation have largely resulted in a reduced amount of ground growing and arboreal lichens and restricted access to resource. This article also discusses alternative forestry practices and approaches that could reduce the impacts of forestry on reindeer husbandry, both in the short and long term.

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Litter of an alien tree, Casuarina equisetifolia, inhibits seed germination and initial growth of a native tree on the Ogasawara Islands (subtropical oceanic islands)

Hata

Kato

Kachi

2010

Journal of Forest Research

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We investigated the effects of the accumulation of litter of an alien tree, Casuarina equisetifolia, on the initial establishment of Schima mertensiana, a tree native to the Ogasawara (Bonin) Islands, in the northwestern Pacific Ocean, in field and greenhouse experiments. The field experiment compared emergence of seedlings in forests dominated by C. equisetifolia with those in native forests, with and without litter removal. The greenhouse experiment compared seedling germination and biomass among 12 treatments that included two soil types (collected from the C. equisetifolia and native forests), two litter types (C. equisetifolia and native litter), and three amounts of litter (5, 15, or 45 g/pot). Significantly fewer S. mertensiana seedlings emerged at sites dominated by C. equisetifolia than at sites of native species in the field experiment. Litter removal tended to increase seedling emergence. Fewer and smaller S. mertensiana seedlings germinated with greater litter cover regardless of soil type or litter type in the greenhouse experiment. Our results demonstrate that C. equisetifolia litter suppresses germination and initial growth of S. mertensiana, and that the main cause of the suppression is the greater amount of litter accumulated under C. equisetifolia forest floor rather than factors such as the nature of the soil or litter between native and alien species.

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Differences in litter cover and understorey flora between stands of introduced lodgepole pine and native Scots pine in Sweden

Cited by 29 publications

References 26 publications

Composition of functional groups of ground vegetation differ between planted stands of non-native <i>Pinus contorta</i> and native <i>Pinus sylvestris</i> and <i>Picea abies</i> in northern Sweden

Composition of functional groups of ground vegetation differ between planted stands of non-native <i>Pinus contorta</i> and native <i>Pinus sylvestris</i> and <i>Picea abies</i> in northern Sweden

Effects of Modern Forest Management on Winter Grazing Resources for Reindeer in Sweden

Litter of an alien tree, Casuarina equisetifolia, inhibits seed germination and initial growth of a native tree on the Ogasawara Islands (subtropical oceanic islands)

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