Oak decline in Helsinki portrayed by tree-rings, climate and soil data

Helama, Samuli; Läänelaid, Alar; Raisio, Juha; Tuomenvirta, Heikki

doi:10.1007/s11104-008-9858-z

Cited by 52 publications

(44 citation statements)

References 52 publications

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“…3a) show similar long-term trends for all five species, with reduced growth evident in the mid-1970s, mid-1980s, mid-1990s and towards the end of the chronologies in 2005. This is consistent with well-documented summer drought conditions in Britain in 1976, 1984and 2003(Innes 1990, Morecroft et al 2002, Hendry et al 2005). Negative pointer years (i.e., radial growth is less than one standard deviation from the mean for 75% of sample trees) for Q.…”

Section: Annual Growth Variations and Sensitivitysupporting

confidence: 90%

“…While site conditions modulate climate-growth correlations (Wilson et al 2008) information on species-specific climate responses still can be derived (Carrer 2011, Sanders et al 2012. This approach was the subject of a number of dendrochronological studies (Leblanc & Foster 1992, Dwyer et al 1995, Eilmann et al 2006, Danek et al 2007, Friedrichs et al 2009, Helama et al 2009, Di Filippo et al 2010, Scharnweber et al 2011). However, a direct comparison of the response to climate of different oak species growing in close proximity has not been undertaken for mature forest stands.…”

Section: Introductionmentioning

confidence: 99%

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Species-specific climate response of oaks (Quercus spp.) under identical environmental conditions

Sanders¹,

Pitman²,

Broadmeadow³

2014

iForest

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© iForest -Biogeosciences and Forestry IntroductionAn increase in pest and disease outbreaks as well as projected climate warming constitutes a serious threat to forestry over the coming decades (Bolte et al. 2009, Sturrock et al. 2011. As a consequence of these impacts, individually or in combination, tree vitality and survival may decline resulting in reduced productivity (Leuzinger et al. 2005). The resilience of species to biotic and abiotic stresses, as well as their adaptation potential to changing environmental conditions, is important knowledge to guide sustainable forest management (Arend et al. 2011). Oak comprises the highest percentage of broadleaved woodland in Great Britain but its yield is expected to decline in the south and east under future climate projections (Broadmeadow et al. 2005). These forests possess a high economic and socio-economic value (Evans 1984, Grant & Edwards 2008, raising the question as to whether replacement with another oak species, better adapted to summer drought and wet winters, is an appropriate response to projected climate change. While Quercus species are believed to show high competitiveness under drier conditions than currently experienced in southern England (Abrams 1990, Broadmeadow et al. 2005, Eilmann et al. 2006, Thomas et al. (2002) found that a combination of waterlogging in winter and summer drought weakens oak to a level where diseases can attack more readily. Cases of drought-induced mortality have also been reported in Europe (Dreyer 1994, Brasier 1996, Gibbs & Greig 1997, Allen et al. 2010. Modelled results presented by Attorre et al. (2008) suggest that the general assumption regarding drought sensitivity is invalid; instead, the performance of oak is dependent on origin and the characteristics of individual species. Other authors attribute the decline of oak in Europe to a combination of several factors, including infection by Phytophthora cinnamomi exacerbated by climatic factors (Brasier & Scott 1994). Thomas & Blank (1996) propose nutrient imbalance as the reason for oak decline, while Andersson et al. (2011) concluded that the decline of oak and its inevitable death is a long process which can begin decades previously.Tree ring analysis can be used to better understand the potential for an onset of decline driven by responses to climate (Schweingruber 1988(Schweingruber , 1990. Despite age and management-related variation in growth, the sensitivity of a species on a given site to environmental changes can be assessed (Friedrichs et al. 2009). Tree-ring analysis is regularly used to evaluate climate-growth interactions as well as establishing the drivers for tree mortality (Cook et al. 1987). While site conditions modulate climate-growth correlations (Wilson et al. 2008) information on species-specific climate responses still can be derived (Carrer 2011, Sanders et al. 2012. This approach was the subject of a number of dendrochronological studies (Leblanc & Foster 1992, Dwyer et al. 1995, Eilmann et al. 2006, Danek et al. 2007, Friedrichs et al. 2...

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Section: Annual Growth Variations and Sensitivitysupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Species-specific climate response of oaks (Quercus spp.) under identical environmental conditions

Sanders¹,

Pitman²,

Broadmeadow³

2014

iForest

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“…Maximum response tends to shift towards earlier (September) and later (November) for RW and LW, respectively. The peak correlation between radial oak increment and summer moisture stress was reported from Slovenia (Čufar et al, 2008a,b) to southern Finland (Helama et al, 2009a). The relatively wide window of optimal response was also expected, as a detailed study conducted over a dendrochronological oak network in Germany also pointed out the clear sensitivity of Q. robur to moisture stress over a relatively longer (annual) window (Friedrichs et al, 2008).…”

Section: Climatological Datamentioning

confidence: 64%

Multiple tree-ring proxies (earlywood width, latewood width and δ13C) from pedunculate oak (Quercus robur L.), Hungary

Kern

Patkó

Kázmér

et al. 2013

Quaternary International

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The aim of this study was to analyse the effects of climatic factors (i.e. monthly mean temperature and total precipitation) on radial growth (earlywood width, latewood width, and total ringwidth) and on latewood stable carbon isotope composition in a pedunculate oak (Quercus robur L.) stand in northeastern Hungary. Earlywood widths showed the weakest common variance and lack of statistically significant relationship to monthly precipitation and temperature. Latewood width showed the strongest common chronological signal. Correlation analysis with the monthly climate series pointed out the strongest positive/negative correlation with June precipitation for latewood width/stable carbon isotope ratio. These parameters shared the strongest climatic response also for seasonal scale since the highest correlation coefficients, 0.49 and -0.62 for latewood width and stable carbon isotope ratio, respectively, were obtained for both with a 10-month precipitation total (from previous November to current August of the growing season). A combined parameter, derived as difference between latewood width and stable carbon isotope indices showed improved statistical relationship compared to the hydroclimatic calibration target both for local and regional spatial scales. Spatial correlation analysis indicated that the hydroclimatic signal encoded in these moisture sensitive tree-ring parameters from Bakta Forest is expected to be representative for the northeastern Carpathians and for the large part of the Great Hungarian Plain. In addition, the hydroclimatic signal of latewood width chronology was compared to three independent records. Results showed that neither the strength nor the rank of the similarity of the local hydroclimate signals were stable throughout the past two centuries. Future palaeo(hydro)climatological efforts targeting the Carpathian(-Balkan) region are recommended to track carefully the spatial domains for which a given, local, proxy-derived hydroclimate reconstruction might provide useful information.

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“…Lebourgeois et al, 2004). Water requirements during the summer are typical of deciduous oaks even in environments that are considerably wetter than those we studied (Čufar et al, 2008;Drobyshev et al, 2008;Friedrichs et al, 2009;Helama et al, 2009;Lebourgeois, 2006;Tardif et al, 2006). Stem age and logging history affect decadal tree productivity response to climate (e.g.…”

Section: Discussionmentioning

confidence: 81%

Climate change and oak growth decline: Dendroecology and stand productivity of a Turkey oak (Quercus cerris L.) old stored coppice in Central Italy

et al. 2010

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Abstract• We combined stem volume increment analysis with dendroecological tools to address two unresolved issues concerning oak dieback in Mediterranean areas: early detection of changes in stand growth, and identification of mechanisms for observed growth declines.• We reconstructed productivity of a stored coppice formed by Turkey oak (Quercus cerris) to test if its growth decline was linked to climatic variability, while also accounting for age-related and sociological factors.

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Oak decline in Helsinki portrayed by tree-rings, climate and soil data

Cited by 52 publications

References 52 publications

Species-specific climate response of oaks (Quercus spp.) under identical environmental conditions

Species-specific climate response of oaks (Quercus spp.) under identical environmental conditions

Multiple tree-ring proxies (earlywood width, latewood width and δ13C) from pedunculate oak (Quercus robur L.), Hungary

Climate change and oak growth decline: Dendroecology and stand productivity of a Turkey oak (Quercus cerris L.) old stored coppice in Central Italy

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