Occurrence of rare and threatened insects living on decaying <i>Populus Tremula:</i> A comparison between Finnish and Russian Karelia

Siitonen, Juha; Martikainen, Petri

doi:10.1080/02827589409382830

Cited by 171 publications

(133 citation statements)

References 5 publications

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“…The colonization of species from large, unmanaged forest tracts to the ones being restored may still be possible in many parts of the boreal forest. For instance, several species threatened or extinct in Finland have viable populations in the adjacent Russian boreal forests (Siitonen and Martikainen, 1994).…”

Section: Introductionmentioning

confidence: 99%

Management in relation to disturbance in the boreal forest

Niemelä

1999

Forest Ecology and Management

153

121

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Disturbances and the consequent habitat heterogeneity are natural features of the boreal forest. Natural disturbances occurring at the level of populations, communities and ecosystems (meters to kilometers and years to hundreds of years), that is, at thè meso-scale' may provide useful guidelines for forest management. This approach is based on the assumption that species are adapted to the disturbance regime of the forest-type that they occupy. However, natural disturbance and human-caused disturbance, such as clear-cutting, may differ substantially in their ecological effects. Potential differences occur on several scales. On the stand scale, removal or destruction of important habitat structures, such as coarse woody debris, during traditional clear-cutting may affect species. On the landscape scale, fragmentation may cause local extinctions and hamper the recolonization of maturing sites by old-growth specialists. The effect of these differences on boreal biota needs to be assessed. On the stand scale, the degree of recovery (resilience) of populations and communities after human-caused disturbance versus natural disturbance, that is, the succession process, could be a useful criterion when developing new forestry methods. On the landscape scale, it is important to maintain enough patches of suitable habitat for the old-growth species in order to prevent local extinctions and to promote recolonizations. Natural landscapes could be used as a reference here. In conclusion, although possibilities of matching forestry with maintenance of taiga biota through development of harvesting methods that mimic natural disturbance seem reasonably good, there is an urgent need to establish criteria for the assessment of the success or failure of such methods. The resilience of forest ecosystems as re¯ected in population changes of surrogate taxa after disturbance could be used to guide management. #

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Section: Introductionmentioning

confidence: 99%

Management in relation to disturbance in the boreal forest

Niemelä

1999

Forest Ecology and Management

153

121

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“…In a study with 31 GTs of the North American aspen, Populus tremuloides Michx., Lindroth and Hwang (1996) found that condensed tannin concentrations varied more than 2-fold between the GT expressing the lowest and the highest concentration, respectively. Also, for the related European aspen, Populus tremula L., a keystone species in the boreal region (Siitonen and Martikainen 1994;Kouki et al 2004), substantial genotypic variations in tannin concentrations have been reported (Robinson et al 2012;Bandau et al 2015). Tannins have long been recognized for their potential role in defending plants against generalist herbivores and pathogens (Kraus et al 2003;Holeski et al 2009;Barbehenn and Constabel 2011;Robinson et al 2012), but they are increasingly also acknowledged to influence soil processes, such as litter decomposition (Kraus et al 2003;Madritch et al 2006;Schweitzer et al 2008;Madritch and Lindroth 2015), through their resistance to degradation by soil microbes, as well as their ability to bind and stabilize plant proteins or microbial enzymes (Benoit and Starkey 1968;Fierer et al 2001;Kraus et al 2003 and references therein;Joanisse et al 2007).…”

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confidence: 99%

Genotypic variability in Populus tremula L. affects how anthropogenic nitrogen enrichment influences litter decomposition

et al. 2016

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Background and aims Boreal forests can receive substantial nitrogen (N) enrichment via atmospheric N deposition and industrial forest fertilization. While it is known that N enrichment can impact ecosystem properties, such as litter decomposition, it remains poorly understood how genetic variability within plant species modifies these impacts. Methods We grew replicates of ten Populus tremula L. genotypes (GTs) under 3 N conditions; ambient, and levels representing atmospheric N deposition and industrial forest fertilization. We measured leaf and litter physical and chemical traits, and conducted a litter decomposition assay.

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“…For rare species in southern Finland, such as the white-backed woodpecker (Dendrocopos leucotos), populations in Russia act as a source for Finland's sink populations (Carlson, 2000). Compared to southern Finland in general, a greater abundance and diversity of native species have been found either in eastern Finland or in northwest Russia (Virkkala et al, 1994;Siitonen and Martikainen, 1994). This is particularly so along the border (Brotons et al, 2003), although a part of this pattern may be caused by natural east-to-west distribution gradients (Kouki and Vä ä nä nen, 2000).…”

Section: 3mentioning

confidence: 99%