Temporal patterns of radial growth in declining Austrocedrus chilensis forests in Northern Patagonia: The use of tree-rings as an indicator of forest decline

Amoroso, Mariano M.; Daniels, Lori D.; Larson, Bruce C.

doi:10.1016/j.foreco.2011.10.021

Cited by 39 publications

(38 citation statements)

References 51 publications

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“…Si bien en la mayoría de los casos estudiados los patrones de declive radial resultan como consecuencia de estos procesos de decaimiento, algunos estudios ponen de manifiesto el rol de la competencia por recursos entre individuos en el desarrollo de estos procesos (Amoroso et al 2012a, 2015, Linares et al 2010, Rodrí-guez-Catón et al 2015 Finalmente, cabe destacar que son escasos los estudios dendroecológicos de bosques en decaimiento que han abordado aspectos de la dinámica como ser los cambios en el establecimiento, los patrones de mortalidad y crecimiento radial (Amoroso y Larson 2010a, Amoroso et al 2012b), debiendo estos aspectos ser estudiados en otros ecosistemas.…”

Section: Estructura Y Dinámica Forestal (Natural Y Como Resultado De unclassified

La aplicación del análisis de los anillos de crecimiento a interrogantes ecológicos: Un breve repaso de la Dendroecología en Hispanoamérica

Amoroso¹,

Suárez²

2015

ECOS

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Section: Estructura Y Dinámica Forestal (Natural Y Como Resultado De unclassified

La aplicación del análisis de los anillos de crecimiento a interrogantes ecológicos: Un breve repaso de la Dendroecología en Hispanoamérica

Amoroso¹,

Suárez²

2015

ECOS

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“…Pedersen (1998) observed a similar reduction of interannual growth variations during the years preceding tree death in North American oaks. However, the long-term studies of Amoroso et al (2012) and Klein et al (2014) showed the opposite trend: declining trees showed a stronger response to interannual climatic variation than healthy trees.…”

Section: Discussionmentioning

confidence: 95%

“…More recently, Bréda and Badeau (2008) showed in a meta-analysis that following severe droughts, the stem radial growth of some trees was permanently decreased. Even when the decline or mortality event cannot be related exclusively to dry conditions, affected trees can show decreased growth, as shown by Amoroso et al (2012) in a study of declining Austrocedrus chilensis. The decreased annual growth of declining trees we observed is consistent with data already obtained from other trees at the same site (Silva 2010), which showed that currently declining trees had exhibited a decreased stem radial increment since 1959.…”

Section: Discussionmentioning

confidence: 99%

“…Recent studies have investigated the roles of C and/or water balances during drought-related tree declines and mortality (Brodribb and Cochard 2009;Galiano et al 2011;Galvez et al 2011;Amoroso et al 2012;Anderegg et al 2012a). Several studies of the role of C starvation have yielded contradictory results (Piper 2011;Hartmann et al 2013b;Zhao et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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Reduced stem growth, but no reserve depletion or hydraulic impairment in beech suffering from long-term decline

Delaporte

Bazot

Damesin

2015

Trees

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Keymessage Under non-extreme drought conditions, reduced stem growth is not associated with reserve or hydraulic impairment in beech suffering from longterm decline. Abstract Global change is expected to increase the frequency and the intensity of drought events in temperate ecosystems. In some regions, this might be associated with an increase in tree decline. Of the ecophysiological mechanisms that have been proposed to explain tree decline, an impairment of the vascular transport system and/or carbon function are two of the most discussed. In a context of long-term decline caused by droughts, we investigated the functional differences between the carbon, nitrogen, and hydraulic functions of healthy and declining mature beech (Fagus sylvatica L.) trees. The study was carried out over two consecutive years with contrasting water availabilities. The radial growth of declining trees was clearly less than that of healthy trees, due to a lower growth rate, associated during the wet year with a shorter growth period. Leaf functional characteristics and hydraulic parameters (native embolism and cavitation vulnerability curves) were similar in healthy and declining trees. However, at the end of a growing season characterized by a dry spring, carbon reserves concentrations in young branches of declining trees were lower than those in healthy trees, though they recovered during the following non-constraining growing season. Our results did not indicate carbon starvation, nitrogen deficiency, or hydraulic failure. However, there seems to be some compensation mechanism related to reserve dynamics in the remaining living tissue of the declining trees. This study shows that the climate conditions of successive years are probably crucial for these functional adjustments to be operational.

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“…Tree health is mainly related to sapwood health, but the presence of microorganisms responsible for fungal attacks also influences physiological processes at the whole tree level. Amoroso et al (2012) stated that bad health in trees reduced diameter growth due to decreases in photosynthesis and carbon balance as a result of a generalised stress (Dobbertin 2005). The lower ADI might be an indirect result of the increased consumption of nutrients and energy associated with the production of defence compounds and repair of tissues in the zone of advanced decay of the tree (Hellgren, Stenlid 1995).…”

Section: Discussionmentioning

confidence: 99%

Tree health influences diameter growth along site quality, crown class and age gradients in Nothofagus forests of southern Patagonia

Beltrán¹,

Pastur²,

Ivancich³

et al. 2013

J. For. Sci.

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ABSTRACT:We examined the influence of tree health on annual diameter increment of trees along gradients in stand site quality, crown classes and tree age in Nothofagus pumilio forests of Southern Patagonia. Healthy trees had higher annual diameter increment than unhealthy trees along all gradients (site quality, crown class, tree age). We argue that tree health could be employed as a qualitative variable in models of tree growth to estimate aboveground biomass and carbon stocks in this forest system.

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Temporal patterns of radial growth in declining Austrocedrus chilensis forests in Northern Patagonia: The use of tree-rings as an indicator of forest decline

Cited by 39 publications

References 51 publications

La aplicación del análisis de los anillos de crecimiento a interrogantes ecológicos: Un breve repaso de la Dendroecología en Hispanoamérica

La aplicación del análisis de los anillos de crecimiento a interrogantes ecológicos: Un breve repaso de la Dendroecología en Hispanoamérica

Reduced stem growth, but no reserve depletion or hydraulic impairment in beech suffering from long-term decline

Tree health influences diameter growth along site quality, crown class and age gradients in Nothofagus forests of southern Patagonia

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