Long-term wood anatomical time series of two ecologically contrasting tropical tree species reveal differential hydraulic adjustment to climatic stress

Islam, Mahmuda; Rahman, Mizanur; Bräuning, Achim

doi:10.1016/j.agrformet.2018.11.037

Cited by 30 publications

(11 citation statements)

References 79 publications

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“…The MVA and MVD chronology showed a significant negative correlation (r = -0.50, p<0.05). The RW also showed a significant inverse correlation with MVD chronology (r = -0.43, p < 0.05), and suggesting that these chronologies may contain opposite environmental signals, as described for other angiosperms (Oladi et al, 2014;Islam et al, 2019). Therefore, this study highlights the relevance of using a multi-variable time-series approach.…”

Section: Tree Age and Statistical Characteristics Of Rw And Vessel Chronologiessupporting

confidence: 58%

“…Including time series of wood anatomical features, i.e., mean vessel (MVA), vessel area and/or vessel density (MVD), can lead to additional information on growth determining factors if these features are influenced by other, e.g. more seasonal environmental factors than ring width (RW) (Verheyden et al, 2005;Ohashi et al, 2014;Islam et al, 2019). Vessel features are known to be sensitive intra-annual indicators of seasonal changes in hydrology (Verheyden et al, 2005;Schmitz et al, 2006), which in turn affects the hydraulic conductivity in trees.…”

Section: Introductionmentioning

confidence: 99%

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Ring width and vessel features of the mangrove Excoecaria agallocha L. depend on salinity in the Sundarbans, Bangladesh

et al. 2021

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Section: Tree Age and Statistical Characteristics Of Rw And Vessel Chronologiessupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Ring width and vessel features of the mangrove Excoecaria agallocha L. depend on salinity in the Sundarbans, Bangladesh

et al. 2021

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“…These adjustments include decreased conduit dimensions (diameter and length), increased conduit wall thickness and wood density, and modifications of pit characteristics [25,30,31]. Even long-term hydraulic adjustments to previous year's droughts can occur, as shown in potted saplings [18] and by dendrochronological studies in tropical rainforest trees [32]. On the other hand, prolonged and/or multiple droughts can weaken the resistance to xylem embolism through deterioration of inter-vessel pit membranes, a phenomenon known as "cavitation fatigue" [33].…”

Section: Plant Hydraulics and Drought Stressmentioning

confidence: 99%

The Possible Role of Non-Structural Carbohydrates in the Regulation of Tree Hydraulics

Tomasella

Petrussa

Petruzzellis

et al. 2019

IJMS

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The xylem is a complex system that includes a network of dead conduits ensuring long-distance water transport in plants. Under ongoing climate changes, xylem embolism is a major and recurrent cause of drought-induced tree mortality. Non-structural carbohydrates (NSC) play key roles in plant responses to drought and frost stress, and several studies putatively suggest their involvement in the regulation of xylem water transport. However, a clear picture on the roles of NSCs in plant hydraulics has not been drawn to date. We summarize the current knowledge on the involvement of NSCs during embolism formation and subsequent hydraulic recovery. Under drought, sugars are generally accumulated in xylem parenchyma and in xylem sap. At drought-relief, xylem functionality is putatively restored in an osmotically driven process involving wood parenchyma, xylem sap and phloem compartments. By analyzing the published data on stem hydraulics and NSC contents under drought/frost stress and subsequent stress relief, we found that embolism build-up positively correlated to stem NSC depletion, and that the magnitude of post-stress hydraulic recovery positively correlated to consumption of soluble sugars. These findings suggest a close relationship between hydraulics and carbohydrate dynamics. We call for more experiments on hydraulic and NSC dynamics in controlled and field conditions.

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“…Tree‐rings provide precisely dated high‐resolution climate proxies that can be used to extend the existing instrumental climate records (Cook et al, 2010; PAGES 2k Consortium, 2013; Panthi et al, 2017). A substantial number of studies using tree‐rings as a proxy have been conducted in the tropical or subtropical regions of Asia, including Thailand (Buckley et al, 2007; Pumijumnong, 2012), Laos (Xu et al, 2011), India (Borgaonkar et al, 2010; Shah et al, 2007), Indonesia (D'Arrigo et al, 2006), Vietnam (Sano et al, 2009), and Bangladesh (Islam et al, 2018a, 2018b; Rahman, Islam, & Bräuning, 2019; Rahman, Islam, Wernicke, & Bräuning, 2019). Previous tree‐ring‐based drought reconstructions have observed local to regional droughts and several megadroughts over Asia, such as the Angkor droughts (the mid‐1300s and early 1400s), the Ming Dynasty drought (1638–1641), the Strange Parallels drought (1756–1768), the East Indian drought (1790–1796), the late Victorian Great Drought (1876–1878), and the eighteenth century drought, with adverse impacts on civilization and society (Buckley et al, 2007, 2010; Cook et al, 2010; Sano et al, 2009; Yadav, 2013).…”

Section: Introductionmentioning

confidence: 99%

Drought Reconstruction Over the Past Two Centuries in Southern Myanmar Using Teak Tree‐Rings: Linkages to the Pacific and Indian Oceans

Zaw

Fan

Bräuning

et al. 2020

Geophysical Research Letters

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To develop a high-resolution paleoclimate proxy record facilitating adaptation measures on drought impacts, we constructed a regional composite tree-ring chronology of teak (Tectona grandis) by combining three local site chronologies from southern Myanmar. Our regional tree-ring record is strongly correlated with the November-April self-calibrated Palmer drought severity index and enabled us to reconstruct drought variability for the period 1802-2016. The reconstruction explained 46.5% of the actual self-calibrated Palmer drought severity index variance. Over the past two centuries, we detected one extreme (1812) and six severe drought years (1810, 1811, 1816, 1852, 1887, and 1980). Dry periods coincided with six major famines that occurred in India. Spatial correlation analyses revealed that drought occurrence is linked to broader-scale atmospheric circulations of the Pacific and Indian Oceans, especially during the positive phase of the El Niño-Southern Oscillation. Our reconstruction provides a useful historical perspective for assessing adaptation measures intent on mitigating future drought impacts in Myanmar. Plain Language SummaryWe developed a 226-year-long ring-width regional chronology of teak by combining three site chronologies from southern Myanmar. Teak growth is mainly controlled by moisture availability during the dry season, making teak a suitable species for assessing drought variation in southern Myanmar. We reconstructed a 215-year drought history and find prolonged droughts occurred in also found a strong association between drought variability in southern Myanmar and sea surface temperatures in the Pacific and Indian Oceans, as well as the El Niño-Southern Oscillation phenomenon. The results are useful to devise necessary policies and strategies for coping with the adverse impacts of drought and protecting the livelihoods of regional populations.

show abstract

Long-term wood anatomical time series of two ecologically contrasting tropical tree species reveal differential hydraulic adjustment to climatic stress

Cited by 30 publications

References 79 publications

Ring width and vessel features of the mangrove Excoecaria agallocha L. depend on salinity in the Sundarbans, Bangladesh

Ring width and vessel features of the mangrove Excoecaria agallocha L. depend on salinity in the Sundarbans, Bangladesh

The Possible Role of Non-Structural Carbohydrates in the Regulation of Tree Hydraulics

Drought Reconstruction Over the Past Two Centuries in Southern Myanmar Using Teak Tree‐Rings: Linkages to the Pacific and Indian Oceans

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