Ghosts of the past: how drought legacy effects shape forest functioning and carbon cycling

Ecology Letters, Journal Year: 2020, Volume and Issue: 23(5), P. 891 - 901

Published: March 10, 2020

Multi-year lags in tree drought recovery, termed 'drought legacy effects', are important for understanding the impacts of on forest ecosystems, including carbon (C) cycle feedbacks to climate change. Despite ubiquity large uncertainties remain regarding mechanistic basis effects and their importance C cycle. In this review, we identify approaches used study effects, from rings whole forests. We then discuss key knowledge gaps pertaining causes how various mechanisms that may contribute these recovery could have contrasting implications Furthermore, conduct a novel data synthesis find differ drastically both size length across US depending if they identified versus gross primary productivity. Finally, highlight promising future research improve our capacity model predict impact health. emphasise holistic view - tissues forests will advance stimulate efforts investigate via experimental, observational modelling approaches.

Language: Английский

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Linking drought legacy effects across scales: From leaves to tree rings to ecosystems

Global Change Biology, Journal Year: 2019, Volume and Issue: 25(9), P. 2978 - 2992

Published: May 27, 2019

Abstract Severe drought can cause lagged effects on tree physiology that negatively impact forest functioning for years. These “drought legacy effects” have been widely documented in tree‐ring records and could important implications our understanding of broader scale carbon cycling. However, increments may be decoupled from ecosystem fluxes due to (a) postdrought alterations allocation patterns; (b) temporal asynchrony between radial growth uptake; (c) dendrochronological sampling biases. In order link rings whole forests, we leveraged a rich dataset Midwestern US was severely impacted by 2012. At this site, compiled records, leaf‐level gas exchange, eddy flux measurements, dendrometer band data, satellite remote sensing estimates greenness leaf area before, during, after the 2012 drought. After accounting relative abundance species stand, estimate led ~10% reductions width year following severe Despite stand‐scale reduction growth, found photosynthesis, gross primary productivity (GPP), vegetation were not suppressed Neither uptake nor biases explain observations but GPP. Instead, elevated photosynthesis co‐occurred with reduced early 2013, indicating resources allocated away conjunction upregulation repair canopy damage. Collectively, results indicate observed other processes, an mechanism decouples signals

Language: Английский

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When tree rings go global: Challenges and opportunities for retro- and prospective insight

Quaternary Science Reviews, Journal Year: 2018, Volume and Issue: 197, P. 1 - 20

Published: Aug. 8, 2018

Language: Английский

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Tree growth influenced by warming winter climate and summer moisture availability in northern temperate forests

Global Change Biology, Journal Year: 2019, Volume and Issue: 26(4), P. 2505 - 2518

Published: Dec. 20, 2019

The role of future forests in global biogeochemical cycles will depend on how different tree species respond to climate. Interpreting the response forest growth climate change requires an understanding temporal and spatial patterns seasonal climatic influences common species. We constructed a new network 310 tree-ring width chronologies from three (Quercus robur, Pinus sylvestris Fagus sylvatica) collected for ecological, management purposes south Baltic Sea region at border bioclimatic zones (temperate continental, oceanic, southern boreal). major factors (temperature, precipitation, drought) affecting monthly scales were identified. Our analysis documents that 20th century Scots pine deciduous is generally controlled by parameters, summer moisture availability increasingly important examined. report changes influence winter variables over last decades, where decreasing late temperature increasing was found. By comparing climate-growth responses 1943-1972 1973-2002 periods characterizing site-level stability, descriptive application segregation distinguished sites with stable dominant parameters (northeast study region), collectively showed unstable (southeast region). findings presented here highlight temporally nonuniform variability, there are geographical coherent regions these similar. Considering continued future, our results provide regional perspectives recent broad-scale relationships trees across temperate boreal transition around Sea.

Language: Английский

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An earlier start of the thermal growing season enhances tree growth in cold humid areas but not in dry areas

Nature Ecology & Evolution, Journal Year: 2022, Volume and Issue: 6(4), P. 397 - 404

Published: Feb. 28, 2022

Language: Английский

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On the need to consider wood formation processes in global vegetation models and a suggested approach

Annals of Forest Science, Journal Year: 2019, Volume and Issue: 76(2)

Published: April 30, 2019

Abstract • Key message Dynamic global vegetation models are key tools for interpreting and forecasting the responses of terrestrial ecosystems to climatic variation other drivers. They estimate plant growth as outcome supply carbon through photosynthesis. However, is itself under direct control, not simply controlled by amount available carbon. Therefore predictions current photosynthesis-driven large increases in future biomass due increasing concentrations atmospheric CO 2 may be significant over-estimations. We describe how understanding wood formation can used reformulate models, with potentially major implications their behaviour.

Language: Английский

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Ranking of tree-ring based hydroclimate reconstructions of the past millennium

Quaternary Science Reviews, Journal Year: 2020, Volume and Issue: 230, P. 106074 - 106074

Published: Jan. 23, 2020

To place recent hydroclimate changes, including drought occurrences, in a long-term historical context, tree-ring records serve as an important natural archive. Here, we evaluate 46 millennium-long based reconstructions for their Data Homogeneity, Sample Replication, Growth Coherence, Chronology Development, and Climate Signal on criteria published by Esper et al. (2016) to assess temperature reconstructions. The compilation of individually calibrated site includes 37 different tree species stem from North America (n = 29), Asia 10); Europe 5), northern Africa 1) southern South 1). For each criterion, the individual were ranked four groups, results showed that no reconstruction scores highest or lowest all analyzed parameters. We find geographical differences overall ranking, but arid semi-arid environments tend score highest. A strong stable signal is found be greater importance than long calibration period. most challenging trade-off identified between high continuous sample replications, well well-mixed age class distribution over time, good internal growth coherence. Unlike reconstructions, proportion are produced using series detrending methods removing centennial-scale variability. By providing quantitative objective evaluation available hope boost future improvements development such provide practical guidance secondary users these

Language: Английский

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Reassessment of growth-climate relations indicates the potential for decline across Eurasian boreal larch forests

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: June 8, 2023

Larch, a widely distributed tree in boreal Eurasia, is experiencing rapid warming across much of its distribution. A comprehensive assessment growth on needed to comprehend the potential impact climate change. Most studies, relying rigid calendar-based temperature series, have detected monotonic responses at margins but not region. Here, we developed method for constructing temporally flexible and physiologically relevant series reassess growth-temperature relations larch Eurasia. Our appears more effective assessing than previous methods. approach indicates widespread spatially heterogeneous that are driven by local climate. Models quantifying these results project negative will spread northward upward throughout this century. If true, risks Eurasia could be conveyed from works.

Language: Английский

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Drought determines the growth stability of different dominant conifer species in Central Asia

Global and Planetary Change, Journal Year: 2024, Volume and Issue: 234, P. 104370 - 104370

Published: Feb. 3, 2024

Language: Английский

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Resilience and response: Unveiling the impacts of extreme droughts on forests through integrated dendrochronological and remote sensing analyses

Forest Ecosystems, Journal Year: 2024, Volume and Issue: 11, P. 100209 - 100209

Published: Jan. 1, 2024

Extreme droughts are anticipated to have detrimental impacts on forest ecosystems, especially in water-limited regions, due the influence of climate change. However, considerable uncertainty remains regarding patterns species-specific responses extreme droughts. Here, we conducted a study integrating dendrochronology and remote sensing methods investigate mosaic-distributed maple-oak (native) natural forests poplar plantations (introduced) Horqin Sandy Land, Northeast China. We assessed tree performances by measuring interannual variations radial growth vegetation index. The results showed that precipitation self-calibrated palmer drought severity index (scPDSI) major factors influencing (RWI) normalized difference (NDVI). severe between 2000–2004 resulted reduced RWI three studied species as well led NDVI reductions both plantations. reached nadir during remained at low levels two years after drought, creating legacy effect. In contrast lack significant correlation scPDSI, exhibited positive with scPDSI indicating greater sensitivity canopy performance than growth. Furthermore, interspecific differences were observed, fast-growing experiencing more decrease negative anomaly native species, highlighting trade-offs resilience rate. This emphasizes importance combining tree-level landscape-scale understand response. Our improves our understanding highlights responses, offering crucial insights for optimizing selection sustainable afforestation management regions under

Language: Английский

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