Relationships between oak decline and groundwater class in The Netherlands

Oosterbaan, A.; Nabuurs, Gert‐Jan

doi:10.1007/bf02465223

Cited by 27 publications

(23 citation statements)

References 1 publication

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“…Thereafter, it is not surprising to find several mentions of C. fusipes in association with different decline episodes [11,15]. Oak decline was often reported in the literature to occur in soils where a temporary and elevated water table occurred [23,29]. In our case, the opposite tendency was observed, which could reflect a strong effect of infection induced by C. fusipes being more severe when soil was less submitted to waterlogging.…”

Section: Discussionmentioning

confidence: 52%

Relationships between soil factors, Quercus robur health, Collybia fusipes root infection and Phytophthora presence

Camy¹,

Delatour²,

Marçais³

2003

Ann. For. Sci.

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-About sixty oaks (Quercus robur), with different status of crown health, located in three plots in north eastern France were assessed for their degree of infection by C. fusipes. Baiting of Phytophthora spp. from soil was carried out at different seasons in a sub sample of these oaks. The variability of soil characteristics, such as depth to waterlogging signs and depth to a gravel layer limiting rooting was evaluated. Soil factors were tightly correlated. Infection induced by C. fusipes was significantly more severe in non-waterlogged conditions. In two plots Phytophthora spp. were present at the base of the majority of trees investigated. Success of Phytophthora isolation was significantly linked with the season. The crown health status deteriorates with increasing severity of infection by C. fusipes and with the depth to waterlogging. Conversely, Phytophthora was not correlated with crown health status.Quercus / Collybia fusipes / root rot fungus / Phytophthora sp. / oak decline Résumé -Relations entre les facteurs du sol, l'état du houppier de Quercus robur, les infections racinaires induites par Collybia fusipes et la présence de Phytophthora. Le niveau d'infection induit par Collybia fusipes a été évalué sur environ 60 chênes pédonculés (Quercus robur) présentant différents états sanitaires, situés dans trois parcelles du nord-est de la France. Le piégeage des Phytophthora spp. présents dans le sol a été effectué sur un sous-échantillon de chênes à différentes saisons. La variabilité des facteurs du sol concernant la profondeur d'apparition des traces d'hydromorphie et la profondeur d'apparition d'un plancher de graviers limitant l'enracinement a été évaluée. Les facteurs du sol étaient fortement inter-dépendants. Les infections induites par C. fusipes diminuaient lorsque les traces d'hydromorphie apparaissaient plus profondément. Différentes espèces de Phytophthora ont été détectées dans deux des trois parcelles. Les Phytophthora étaient alors présents à la base de la majorité des chênes. La détection positive des Phytophthora était fortement liée à la saison de piégeage. L'état sanitaire des chênes diminuait avec la sévérité des infections induites par C. fusipes et la profondeur d'apparition des traces d'hydromorphie. Au contraire, aucun lien n'a pu être mis en évidence entre l'état sanitaire des chênes et la présence du Phytophthora dans le sol.Quercus / Collybia fusipes / pourridié / Phytophthora sp. / dépérissement du chêne

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Section: Discussionmentioning

confidence: 52%

Relationships between soil factors, Quercus robur health, Collybia fusipes root infection and Phytophthora presence

Camy¹,

Delatour²,

Marçais³

2003

Ann. For. Sci.

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“…Soil water excess, and more frequently strongly fluctuating groundwater levels, contributes to root death and oak decline on alluvial hydromorphic soils in Europe (Oosterbaan and Nabuurs, 1991;Thomas and Hartmann, 1998). Changes in site hydrology that cause a rise of groundwater level or the increased likelihood of flooding significantly contribute to the gradual manifestation of the oak decline syndrome by increasing the predisposition of trees to other biotic or climatically induced stresses (Führer, 1998).…”

Section: Possible Causes Of Water Excess Restraining Oak Vitality Andmentioning

confidence: 97%

Too wet for oaks? Inter-tree competition and recent persistent wetness predispose oaks to rainfall-induced dieback in Atlantic rainy forest

Rozas

García‐González

2012

Global and Planetary Change

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Forest dieback is usually triggered by climatic extremes, even if tree decline can be caused by diverse biotic and abiotic stressors acting synergistically on tree vitality. Many case studies worldwide illustrate the global importance of drought-induced forest dieback under a context of climate warming. However, forest decline is also occurring in regions that are not water-limited, but where increasing rainfall and exceptionally rainy events are observed. Here we assessed the influence of inter-tree competition, regional water availability, and largescale climate variation on the decline and death of pedunculate oak (Quercus robur) in an Atlantic rainy forest in NW Spain. All healthy, declining, and dead trees in four replicated forest stands were mapped, and inter-tree competition was individually quantified with a distance-dependent competition index. Long-term variation of annual radial growth was analyzed on a selection of individuals per stand, and its dependence on climate variation was examined by correlation analysis with monthly climatic records. Trees under intense competition showed higher mortality risk. Increasing rainfall and the large-scale climatic pattern El Niño-Southern Oscillation (ENSO) have influenced tree growth during recent decades, acting as long-term stressors. A detrimental effect of water surplus during both the year preceding growth and spring of the current year has been noticed since 1980. Extremely rainy conditions in 2001 resulted in strong short-term stress that killed trees suffering from intense competition and wetness-induced stress. Our findings support that water excess is a relevant triggering factor for dieback of dominant forest trees in rainy temperate deciduous forest. This pattern is possible in regions where increasing precipitation and more frequent and intense rainfall extremes, associated with global climate warming, are happening. Since climate warming may lead to higher total annual rainfall, and to an increase in frequency and intensity of extreme precipitation events, forest dieback episodes associated with wetter conditions may become more common in the future.

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“…A complex of harmful biotic and abiotic factors resulting in oak decline has been recorded across Europe since the end of 1980s (Oosterbaan and Nabuurs 1991;Gaertig et al 2002;Čater and Batič 2006). Apart from insect pests as secondary factors have technical regulations in the landscape (waterbed regulations) led to changed water regime changes in floodplains and altered the availability of the groundwater table especially in growing season, to which the pedunculate oak is particularly sensitive (Čater 2011;Levanič et al 2011).…”

Section: Introductionmentioning

confidence: 99%