Long-term nutrient imbalances linked to drought-triggered forest dieback

Hevia, Andrea; Sánchez‐Salguero, Raúl; Camarero, J. Julio; Querejeta, José Ignacio; Sangüesa‐Barreda, Gabriel; Gazol, Antonio

doi:10.1016/j.scitotenv.2019.06.515

Cited by 50 publications

(38 citation statements)

References 106 publications

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“…The elevated carbon cost of releasing organic acids and carboxylates to rhizosphere soil likely contributed to carbon depletion and loss of vitality in D trees. Nutrient imbalances regarding tree-ring Ca and Mn have been consistently related to dieback and growth decline [39,40], thus supporting the usefulness of Ca:Mn ratio as early warning of forest dieback in response to drought. However, different results between this and previous studies highlight the need for further research to fully understand the role of long-term nutrient imbalances on tree mortality.…”

Section: Discussionmentioning

confidence: 80%

“…Wood nitrogen (N) mass-based concentration (%) was measured with an elemental analyzer (Elementar VarioMAX N/CM, Hanau, Germany). In addition, seven meaningful molar ratios were calculated (N:P, N:K, P:Mn, K:Ca, Ca:Mn, Ca:Al, and Mg:Mn), as they have been proposed to better reflect the environmental changes than simple elemental concentrations [39,58].…”

Section: Nutrient Analysesmentioning

confidence: 99%

“…In fact, variability in tree-ring δ 18 O has been associated with species-specific patterns in seasonal water uptake [35,36] and to water uptake from deeper soil layers with increasing drought [37,38]. Secondly, this isotope-based approach focuses on carbon and water relations in the tree, albeit other potential mechanisms may contribute to forest dieback, including nutrient availability and uptake [20] and related nutritional imbalances [39,40]. Therefore, the combination of different approaches that include growth patterns, wood isotopic signals and dendrochemistry data can provide insights into the growing knowledge that links nutrient-related processes to tree mortality triggered by droughts.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Chronically Low Nutrient Concentrations in Tree Rings Are Linked to Greater Tree Vulnerability to Drought in Nothofagus dombeyi

Andrés

Suárez

Querejeta

et al. 2021

Forests

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Forest dieback and mortality episodes triggered by droughts are receiving increasing attention due to the projected increases in these extreme climate events. However, the role played by nutrient impairment in dieback is understudied, despite interactions among carbon-water balances and nutrition. Here, we followed a comparative analysis of long-term growth, intrinsic water-use efficiency (iWUE), oxygen isotopes (δ18O) and wood-nutrient composition patterns between living (L) and dead (D) trees of a Nothofagus dombeyi population, showing dieback in Argentina. The onset of the growth decline of D trees occurred ca. 40 years before death. These trees showed higher iWUE, pointing to higher drought stress. Their lower δ18O values, together with the uncoupling between δ18O and leaf-level processes, suggested a deeper source of water uptake for this vigor class. D trees showed a poorer nutritional status than L trees that likely amplified the dieback. This was supported by numerous positive associations of P- and K-concentrations in wood and related ratios with iWUE, δ18O and tree growth. Therefore, drought-related nutrient deterioration can significantly contribute to dieback and be an early warning signal of impending tree death.

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Section: Discussionmentioning

confidence: 80%

Section: Nutrient Analysesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chronically Low Nutrient Concentrations in Tree Rings Are Linked to Greater Tree Vulnerability to Drought in Nothofagus dombeyi

Andrés

Suárez

Querejeta

et al. 2021

Forests

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“…[6,7]. In addition, recent studies of the drought-induced forest dieback in northeastern Spain have shown that P. sylvestris and Abies alba Mill forest mortality was caused by long-term nutrient imbalances [8]. Specifically, this study showed that differences between declining and non-declining trees of both species were the highest in tree-ring Ca/Mn, Mn/Al, and P/Mn ratios [8].…”

Section: Introductionmentioning

confidence: 55%

“…In addition, recent studies of the drought-induced forest dieback in northeastern Spain have shown that P. sylvestris and Abies alba Mill forest mortality was caused by long-term nutrient imbalances [8]. Specifically, this study showed that differences between declining and non-declining trees of both species were the highest in tree-ring Ca/Mn, Mn/Al, and P/Mn ratios [8]. Furthermore, the latest study from China indicated that exogenous Ca 2+ supplementation and ectomycorrhizal fungi (Suillus luteus (L.) Roussel (1796)) inoculation together can enhance the drought tolerance of Pinus sylvestris var.…”

Section: Introductionmentioning

confidence: 99%

Scots Pine Seedlings Growth Under Different Ca/Mn Soil Ratios

Romanchuk¹,

Didenko²,

Sus³

et al. 2021

IJEE

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Low Ca/Mn ratios in soils are considered one of the causes of forest decline in the northern hemisphere, in particular, Scots pine forest decline. Nevertheless, there are little data on the growth and development of forest trees, especially Scots pine, under different soil concentrations of calcium and manganese. Therefore, the present study aims to estimate Scots pine seedlings' height growth under different Ca/Mn soil ratios. For this purpose, we measured the height of 8-month-old Scots pine seedlings that grew on two adjacent plots, whose soils had different origins and, therefore, differed significantly in their properties. Some of these soil properties, namely exchangeable and hydrolytic acidity, the sum of absorbed bases, the content of humus, alkali-hydrolyzable nitrogen, exchangeable potassium and calcium, mobile sulfur and phosphorus, mobile compounds of copper, zinc, cobalt, cadmium, lead, and manganese, were determined by various methods. Pairwise comparison of values of listed above properties of soils from these experimental plots revealed that these soils differed significantly in manganese and calcium content and acid-basic properties. Therefore, as the ratio of molal concentrations of exchangeable calcium to manganese mobile compounds (Ca/Mn ratio) in the soil is a parameter that combines those soil properties that differed significantly between the two plots, we used the one-way ANOVA to verify the association between Ca/Mn ratio and Scots pine seedlings' height growth rate. As a result, this analysis revealed a statistically significant difference (p < 0.05) in mean height between Scots pine seedlings that grew under relatively low (45.28/1) and relatively high Ca/Mn ratio (195.12/1) in soil. Nevertheless, although the mean height of Scots pine seedlings that grew at the ratio of 45.28/1 was approximately 1.6 times lower than seedlings that grew at the ratio of 195.12/1, the optimum value of the Ca/Mn ratio in the soil for Scots pine remains unknown. In addition, the hypothesis that untested soil properties have also caused the differences in the mean height of seedlings was not rejected. Thus, the impact of the Ca/Mn ratio together with the potential impact of untested soil properties on the growth and development of Scots pine and the optimum value of this ratio for this species needs to be investigated in further studies.

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The Impact of Climate Change on Forest Tree Species Dieback and Changes in Their Distribution

Pietrzykowski

Woś

2021

Soil Biology

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Long-term nutrient imbalances linked to drought-triggered forest dieback

Cited by 50 publications

References 106 publications

Chronically Low Nutrient Concentrations in Tree Rings Are Linked to Greater Tree Vulnerability to Drought in Nothofagus dombeyi

Chronically Low Nutrient Concentrations in Tree Rings Are Linked to Greater Tree Vulnerability to Drought in Nothofagus dombeyi

Scots Pine Seedlings Growth Under Different Ca/Mn Soil Ratios

The Impact of Climate Change on Forest Tree Species Dieback and Changes in Their Distribution

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