Preliminary dendroecological survey on pedunculate oak (Quercus robur L) stands in Tuscany (Italy)

Santini, Alberto; Bottacci, A.; Gellini, R.

doi:10.1051/forest:19940101

Cited by 23 publications

(28 citation statements)

References 3 publications

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“…Earlywood formation seems to be mainly controlled by previous autumn conditions, latewood widths of the preceding years and January temperature. This positive link has been previously observed in other studies [35,37,45] and could be ecophysiological meaningful. It could be the consequence of a trade-off between allocation to vessels or leaves at bud burst time.…”

Section: Discussionsupporting

confidence: 88%

“…Another explanation could be that roots will continue to grow at the end of the growing season if they have a sufficient supply of nutrients and water, until the soil temperatures become too low [42]. As a result, if it rains during this period the roots will grow and when the new growth cycle begins, the following year, the tree will have a much larger root structure and will therefore be in a position to grow more [45]. For earlywood formation, the related shortening of the growing season due to deficient hydric balance in March could partially explain the correlation (only significant at the 0.10 level) observed with this month.…”

Section: Discussionmentioning

confidence: 99%

“…Mean radial growth and extreme growth years appeared to be more sensitive to spring and autumn precipitation than temperature which coincides with the radial growthclimate relationships for this species in Atlantic, Mediterranean and Central European localities (positive response to precipitation during May to July) [3,5,35,38,44,45]. Both ring components can be successfully used for dendroclimatological purposes and to obtain subseasonal climatic information.…”

Section: Discussionmentioning

confidence: 99%

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Climate-tree-growth relationships ofQuercus petraeaMill. stand in the Forest of Bercé (“Futaie des Clos”, Sarthe, France)

Lebourgeois¹,

2004

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-The past history of a 300-year-old Quercus petraea stand (the "Futaie des Clos", 8 ha) located 20 km from the town of Le Mans in the Forest of Bercé in the western part of France (Sarthe) was analysed by a dendroecological approach. According to the number of healthy trees alive (> 400), the stand age (> 300 years), and the dimensions of the trees (dia: 92 cm; height: 45.2 m), this plot constitutes one of the most remarkable oak grove in France. High competition pressure between trees appeared to be the most important factor to explain the high-quality timber (high straight stems without wood defaults, narrow regular rings). After an initial 90-year period of decrease, this stand shows a 1 mm·year -1 growth increment from the 1810s to the present. The growth increase of 40-50% occurring for over than 20 years can be interpreted as a response to the increase of harvesting intensity. The influence of climate was evaluated by comparing earlywood, latewood and total ring indices with monthly climatic data collected at Le Mans over the period . Extreme growth years coincided with wet or dry springs (May-June) (± 40% of rainfall in relation to normal conditions) often associated with warm or fresh July. The climatic models accounted for between 18 and 26% of the variability of ring widths, and suggested that earlywood formation depended mainly on previous autumn hydric balance and winter temperature whereas the growth of the latewood band was maximum in early spring (positive effect of May hydric balance). The ecophysiological interpretations of the climatic correlations are discussed. dendroclimatology / tree ring / radial growth / climate / response function / Quercus petraea / long term chronology / pointer years Résumé -Dendroclimatologie du chêne sessile (Quercus petraea Mill.) en forêt de Bercé ("Futais des Clos", Sarthe, France). Une étude dendroécologique a été entreprise afin d'analyser l'évolution de la croissance radiale d'un peuplement âgé de chêne sessile (Quercus petraea Mill.) (la Futaie des Clos) localisé dans la forêt de Bercé à 20 km du Mans (Sarthe -France). En raison du nombre d'arbres présents (plus de 400 sur les 8 ha), de leur âge (> 300 ans en 2001) et de leur dimension (diamètre et hauteur moyens : 92 cm et 45,2 m), ce peuplement constitue une des plus remarquables chênaie sessiliflore de France. La sylviculture peu intensive pratiquée dans le peuplement explique en grande partie la très grande qualité des arbres (tronc très droit sans défaut, cernes fins réguliers). Après une période de décroissance de 90 ans, la largeur moyenne des cernes est d'environ 1 mm par an depuis 1810. L'augmentation de croissance observée depuis une vingtaine d'années peut être interprétée comme l'expression de l'augmentation de l'intensité des éclaircies (diminution de la compétition entre les arbres). L'effet du climat a été analysé en comparant les variations du bois initial, du bois final et du cerne complet aux données climatiques du Mans sur la période 1921-2001. Les années de croissance extrêmes (a...

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Climate-tree-growth relationships ofQuercus petraeaMill. stand in the Forest of Bercé (“Futaie des Clos”, Sarthe, France)

Lebourgeois¹,

2004

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“…II) mainly limited growth in mature and old oaks. The negative effect of summer temperatures on oak growth has been previously observed in several localities of Continental Europe [20,21], in northern Spain [35,44] and also in the Mediterranean region [47,55]. High summer temperatures may induce increased water stress and a subsequent decrease in radial growth, due to elevated water loss associated with evapotranspiration and soil water evaporation.…”

Section: Time-independent Responses To Climatementioning

confidence: 88%

Dendrochronology of pedunculate oak (Quercus robur L.) in an old-growth pollarded woodland in northern Spain: tree-ring growth responses to climate

Rozas

2005

Ann. For. Sci.

100

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-Both time-independent and time-dependent responses of radial growth in pedunculate oak (Quercus robur L.) to climate were investigated in an old-growth woodland in the Cantabrian lowlands, northern Spain. This was done by using correlation analysis, bootstrapped response functions and Kalman filter analysis. Responses to climatic factors were explored in three different oak age-classes: young < 120 years, mature 170-225 years old, and old-growth trees 250-470 years. Time-independent climatic models showed age-specific responses. Between 55.2 to 66.8% of ring-width discovered variance was explained by weather conditions in the period 1940-1998. Radial growth of young oaks was limited by the temperatures in June of the year the ring was formed, while mature and old-growth oaks showed a negative response to winter and summer temperatures, and a positive one to summer precipitation. Time-dependent models revealed that the effect of several climatic variables on tree growth was not constant through time. This variability could be explained by physiological changes related to tree ageing, while it was unrelated to changes in other environmental factors. Overall, these results suggest that any assumption of an ageindependent climate-growth relationship for oak in the studied locality is unreliable, and anticipate the probable responses of oaks growing in old-growth woodlands to global climatic changes.climate / dendroecology / Kalman filter / response function / ring width Résumé -Étude dendrologique du chêne pédonculé (Quercus robur L.) dans une forêt âgée, d'arbres traités en têtard, du nord de l'Espagne : influence du climat sur la largeur des cernes. Dans une forêt âgée, située à basse altitude dans la région Cantabrique, on a étudié les relations entre le climat et la largeur des cernes chez le chêne pédonculé (Quercus robur L.) ces relations pouvant être indépendantes ou dépendantes du temps. Pour ce faire, on a fait appel à la méthode de rééchantillonnage (bootstrapped response functions) et au filtre de Kalman. Les réponses aux facteurs climatiques ont été recherchées dans trois classes d'âge des chênes à savoir : les sujets jeunes (inf. à 120 ans), les sujets matures (170 à 225 ans), les très vieux arbres (250 à 470 ans). Les modèles climatiques indépendants du temps révèlent des réponses liées spécifiquement à l'âge. Entre 55,2 et 66,8 % de la variance de l'épaisseur des cernes s'expliquent par les conditions climatiques au cours de la période 1940-1998. L'accroissement en diamètre des jeunes chênes est limité par les températures du mois de Juin de l'année de formation du cerne, tandis que chez les arbres matures ou très vieux, on enregistre une réponse négative avec les températures hivernales ou estivales, et une réponse positive avec l'augmentation des précipitations estivales. Les modèles dépendant du temps révèlent que l'effet des diverses variables climatiques sur la largeur des cernes n'est pas constant dans le temps. Cette variabilité pourrait s'expliquer par des changements d'ordre physiol...

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“…Parmi les facteurs abiotiques, le climat joue un rôle pré-pondérant (Jordan et Lockaby, 1990). De nombreuses études, qui ont examiné spécifiquement l'effet des fluctuations climatiques sur la croissance, l'ont bien démontré (par exemple, Perala, 1983 ;Wijk, 1986 ;Ford et al, 1987a, b ;Le Goff et Ottorini, 1993 ;Santini et al, 1994 ;Vose et Swank, 1994 ;Yin et al, 1994). Au cours des dernières décennies, la reconstitution de sé-ries chronologiques de paramètres climatiques à partir de séries dendrochronologiques a pris de plus en plus d'ampleur (Cook et al, 1987 ;D'Arrigo et al, 1992).…”

Section: Introductionunclassified

Importance de différents paramètres climatiques sur la croissance et la formation du bois de pin rouge (Pinus resinosa Ait) en Ontario (Canada)

LaRocque

1997

Ann. For. Sci.

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Preliminary dendroecological survey on pedunculate oak (Quercus robur L) stands in Tuscany (Italy)

Cited by 23 publications

References 3 publications

Climate-tree-growth relationships ofQuercus petraeaMill. stand in the Forest of Bercé (“Futaie des Clos”, Sarthe, France)

Climate-tree-growth relationships ofQuercus petraeaMill. stand in the Forest of Bercé (“Futaie des Clos”, Sarthe, France)

Dendrochronology of pedunculate oak (Quercus robur L.) in an old-growth pollarded woodland in northern Spain: tree-ring growth responses to climate

Importance de différents paramètres climatiques sur la croissance et la formation du bois de pin rouge (Pinus resinosa Ait) en Ontario (Canada)

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