Drought matters – Declining precipitation influences growth of Fagus sylvatica L. and Quercus robur L. in north-eastern Germany

Scharnweber, Tobias; Manthey, Michael; Criegee, Christian; Bauwe, Andreas; Schröder, Christian; Wilmking, Martin

doi:10.1016/j.foreco.2011.05.026

Cited by 251 publications

(189 citation statements)

References 72 publications

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“…Friedrichs et al 2009;Scharnweber et al 2011) and precipitation might have increased at site SW: in contrast to the former statement about the sites that no significant differences appear across the valley (Geßler et al 2001), measured precipitation at site SW-C from 2001 to 2007 was higher than at NE-C (1,027 compared to 865 mm annual average). During the simulation period, the driest year was 2003 that has been shown to decrease carbon assimilation in Europe in general (Ciais et al 2005) and for beech in particular (Charru et al 2010).…”

Section: Discussioncontrasting

confidence: 64%

Extending a physiological forest growth model by an observation-based tree competition module improves spatial representation of diameter growth

2013

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One of the pivotal objectives in forestry research is to estimate the response of silvicultural target variables to climate change scenarios at high temporal resolution in order to consider within-year feedbacks between growth and environmental conditions. To meet this challenge, models are needed which support and complement the widely used observation-based decision systems in forest management and consulting. Physiological models in particular provide the fundamental prerequisites to reflect the impact of various simultaneously changing environmental conditions. However, a physiological representation at the individual tree level is computationally very expensive and sensitive to uncertain initializations. We thus propose an approach that combines a modern representative of the physiological cohort model type, MoBiLE-PSIM, with the individual tree competition concept of a distance-dependent empirical growth simulator (SILVA). The resulting hybrid provides a key feature for the consideration of forest management in long-term simulations at high computational efficiency. The extended model was evaluated with growth-diameter distributions obtained from core-boring at two beech (Fagus sylvatica L.) forest sites in south-west Germany that differ in exposure and soil conditions. The mean bias of annual standscale growth from 2001 to 2007 decreased from -0.59 to -0.41 mm at one evaluation plot and from -0.55 to -0.24 mm at the other when the competition module was coupled in. Inclusion of the SILVA-based individual tree module into MoBiLE-PSIM improved the size-dependent representation of competition and growth on five-year and even annual timescale. This was particularly the case where the spatial distribution of dominant trees was clustered.

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Section: Discussioncontrasting

confidence: 64%

Extending a physiological forest growth model by an observation-based tree competition module improves spatial representation of diameter growth

2013

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“…Beech and oak form pure and mixed stands, but productivity of mixed beech-oak forests might be superior to pure stands depending on site conditions , and the importance of mixed stands might increase with the consequences of climate changes . However, the future status of beech and oak forests affected by climate changes remains unclear and it is currently under intensive debate (Geßler et al, 2006;Kramer et al, 2010;Czucz et al, 2011;Scharnweber et al, 2011;Mette et al, 2013;Zimmermann et al, 2015). Succession from oak-to beech-dominated forest stands is often observed (Rohner et al, 2012;Petritan et al, 2014), but this process is usually long and complex, involving a variable pattern of competition for light, moisture and nutrient resources at the stage of regeneration, but also a variable pattern of mortality of senescent individuals (Vera et al, 2006;Bontemps et al, 2012;Ligot et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Genetic Insights into Ecological Succession from Oak- (Quercus robur L.) to Beech- (Fagus sylvatica L.) Dominated Forest Stands

Sandurska¹,

Ulaszewski²,

Burczyk³

2017

Acta Biologica Cracoviensia S. Botanica

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Genetic diversity is often considered a major determinant of long term population persistence and its potential to adapt to variable environmental conditions. The ability of populations to maintain their genetic diversity across generations seems to be a major prerequisite for their sustainability, which is particularly important for keystone forest tree species. However, little is known about genetic consequences of demographic alterations occurring during natural processes of ecological succession involving changes in the species composition. Using microsatellites, we investigated genetic diversity of adult and offspring generations in beech (Fagus sylvatica L.) and oak (Quercus robur L.) populations coexisting in a naturally established old-growth forest stand, showing some symptoms of ongoing ecological succession from oak-to beech-dominated forest. In general, adult generations of both species exhibited high levels of genetic diversity (0.657 for beech; 0.821 for oak), which, however, depended on the sets of selected genetic markers. Nevertheless, several symptoms such as differences in genetic diversity indices between generations, significant levels of inbreeding (up to 0.029) and low estimates of effective population size (48-80) confirmed the declining status of the oak population. On the other hand, the uniform distribution of genetic diversity indices across generations, low levels of inbreeding (0.004), low genetic differentiation among adults and offspring and, most importantly, large estimates of effective population size (119-716), all supported beech as a successive and successful tree species in the studied forest stand.

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“…Examination of beech radial growth at a yearly basis confirmed that frequent and intense growth reductions go along with a decreasing growth trend. The exceptionally hot and dry growing season of 1976 [29,63] could be considered as a transitional year ( Figure 6). …”

Section: Discussionmentioning

confidence: 99%

Major Changes in Growth Rate and Growth Variability of Beech (Fagus sylvatica L.) Related to Soil Alteration and Climate Change in Belgium

Latte

Perin

Kint

et al. 2016

Forests

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Global change-particularly climate change, forest management, and atmospheric deposition-has significantly altered forest growing conditions in Europe. The influences of these changes on beech growth (Fagus sylvatica L.) were investigated for the past 80 years in Belgium, using non-linear mixed effects models on ring-width chronologies of 149 mature and dominant beech trees (87-186 years old). The effects of the developmental stage (i.e., increasing tree size) were filtered out in order to focus on time-dependent growth changes. Beech radial growth was divided into a low-frequency signal (=growth rate), mainly influenced by forest management and atmospheric deposition, and into a high-frequency variability («mean sensitivity), mainly influenced by climate change. Between 1930 and 2008, major long-term and time-dependent changes were highlighted. The beech growth rate has decreased by about 38% since the 1950-1960s, and growth variability has increased by about 45% since the 1970-1980s. Our results indicate that (1) before the 1980s, beech growth rate was not predominantly impacted by climate change but rather by soil alteration (i.e., soil compaction and/or nitrogen deposition); and (2) since the 1980s, climate change induced more frequent and intense yearly growth reductions that amplified the growth rate decrease. The highlighted changes were similar in the two ecoregions of Belgium, although more pronounced in the lowlands than in the uplands.

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Drought matters – Declining precipitation influences growth of Fagus sylvatica L. and Quercus robur L. in north-eastern Germany

Cited by 251 publications

References 72 publications

Extending a physiological forest growth model by an observation-based tree competition module improves spatial representation of diameter growth

Extending a physiological forest growth model by an observation-based tree competition module improves spatial representation of diameter growth

Genetic Insights into Ecological Succession from Oak- (Quercus robur L.) to Beech- (Fagus sylvatica L.) Dominated Forest Stands

Major Changes in Growth Rate and Growth Variability of Beech (Fagus sylvatica L.) Related to Soil Alteration and Climate Change in Belgium

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