Evidence of declining trees resilience under long term heavy metal stress combined with climate change heating

Nechita, Constantin; Iordache, Mihaela; Lemr, Karel; Levanič, Tom; Pluháček, Tomáš

doi:10.1016/j.jclepro.2021.128428

Cited by 23 publications

(11 citation statements)

References 93 publications

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“…After entering the xylem, elements may migrate horizontally between tree rings, moving from the physiologically active region to the inactive region (Battipaglia et al, 2010). The gradual increase in Zn concentration from heartwood to sapwood in tree rings, is likely due to Zn's horizontal migration (Amais et al, 2021;Nechita et al, 2021). The forest fire's flue gas contains a high concentration of Zn, which can be absorbed by plants and accumulate in tree rings.…”

Section: Discussionmentioning

confidence: 99%

Impact of forest fire on radial growth of tree rings and their element concentrations of Pinus sylvestris and Larix gmelinii in northern China

Mao

Guo

et al. 2023

Front. For. Glob. Change

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AimsThrough analyzing the responses of the radial growth and element concentrations (B, Mg, Al, K, Ca, Mn, Fe, Zn, Na, P, Ni, and Cu) of tree rings of two dominant tree species to forest fires, we aimed to investigate the relationship between tree rings and the fires.MethodsWe sampled wood cores of Pinus sylvestris and Larix gmelinii in the northern forest region of China, where forest fires happened in 1990 and 2008. The ring-width growth of P. sylvestris and L. gmelinii from 1986 to 1995 and 2004 to 2013 in two sites of Tahe County were measured. Element concentrations in tree rings were determined using inductively coupled plasma mass spectrometry (ICP-MS).ResultsOur results showed that tree-ring radial growth was largely reduced after the fire, together with the increase in concentrations of B, Al, Mn, and Fe but the decrease in some samples in K. Strong correlations were observed between tree-ring growth and concentrations of Mg and Mn of P. sylvestris and Znof L. gmelinii.DiscussionThe results provide evidence that variations in tree-ring growth and element concentrations, particularly concentrations of B, Al, Mn, and Fe, are potentially useful to monitor forest fires, which add new insights into the study of forest fire history.

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Section: Discussionmentioning

confidence: 99%

Impact of forest fire on radial growth of tree rings and their element concentrations of Pinus sylvestris and Larix gmelinii in northern China

Mao

Guo

et al. 2023

Front. For. Glob. Change

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“…With correlations between NDVI and tree rings, Babst et al [57] detected the outbreak of autumnal moth (Epirrita autumnata) in Northern Sweden, which caused defoliation but did not directly kill the trees. Other patterns of stressors were detected from NDVI using TR, respectively, heavy metal pollution in a heavily industrialized area [58]. With Leibig's law of the minimum, the most limiting factor controls the main stress on forest growth and synchronizes the stress to the leaves (recorded by NDVI) and the xylem (recorded by TRW) [13].…”

Section: Limiting Factors For the Coupling With Ndvi And Trwmentioning

confidence: 99%

Fine-Scale NDVI Reconstruction Back to 1906 from Tree-Rings in the Greater Yellowstone Ecosystem

Thapa

Speer

2021

Forests

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Global warming and related disturbances, such as drought, water, and heat stress, are causing forest decline resulting in regime shifts. Conventional studies have combined tree-ring width (TRW) and the normalized difference vegetation index (NDVI) to reconstruct NDVI values and ignored the influences of mixed land covers. We built an integrated TRW-NDVI model and reconstructed the annual NDVI maps by using 622 Landsat satellite images and tree cores from 15 plots using point-by-point regression. Our model performed well in the study area, as demonstrated by significant reconstructions for 71.14% (p < 0.05) of the area with the exclusion of water and barren areas. The error rate between the reconstructed NDVI using the conventional approach and our approach could reach 10.36%. The 30 m resolution reconstructed NDVI images in the recent 100 years clearly displayed a decrease in vegetation density and detected decades-long regime shifts from 1906 to 2015. Our study site experienced five regime shifts, markedly the 1930s and 1950s, which were megadroughts across North America. With fine resolution maps, regime shifts could be observed annually at the centennial scale. They can also be used to understand how the Yellowstone ecosystem has gradually changed with its ecological legacies in the last century.

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“…Asthma, allergies, bone ailments, and lifetime cancer risk are some of these challenges. Ingestion of foods and beverages, skin contact, and inhaling air are some of the most common ways trace elements enter the body [18,[20][21][22]. Industrialized areas have been the focus of many studies regarding trace elements [3,16,[23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Trace Elements on Ecophysiological Characteristics of Ligustrum obtusifolium Saplings

Cao

Arif

Cui

et al. 2023

Forests

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Phytoremediation is becoming more prevalent globally. Literature on phytoremediation strategies in western China is relatively scarce. The present research sought to fill this gap by examining the effects of trace elements such as Cd, Cr, Pb, and Zn on growth, physiological traits, tolerances, and accumulation characteristics in 2-year-old saplings of Ligustrum obtusifolium. The gradient of trace element concentration was determined by adding exogenous trace elements to the soil in a pot experiment: CK (no exogenous trace element), T1, T2, and T3 (Cd 0, 2, 5, and 10 mg/kg; Cr 0, 300, 500, and 700 mg/kg; Pb 0, 400, 800, and 1200 mg/kg; and Zn 0, 300, 500, and 1000 mg/kg, respectively). The results indicated that Chla, Chlb, and total Chls significantly decreased (p < 0.05) in the leaves of L. obtusifolium, with the lowest value obtained during soil treatment with T3. Along with the increase in trace element concentration, the net increase in height, root biomass, aerial biomass, and total biomass was reduced significantly. The net growth of L. obtusifolium under Cr stress did not differ significantly from that of CK at T1; however, the net growth of L. obtusifolium under Cr stress was considerably reduced at T2 and T3. The antioxidant enzyme activity of L. obtusifolium increased under different trace element stresses and first increased and then decreased as trace element levels increased. It was found that the SOD, POD, CAT, and APX activity of L. obtusifolium peaks at T2 under Cd and Zn stress in contrast to a peak at T1 under Cr and Pb stress. The contents of trace elements in L. obtusifolium roots, stems, and leaves increased along with the increase in soil trace element levels. Cr, Pb, and Zn threshold values can be set at 300 mg/kg, 400 mg/kg, and 300 mg/kg, respectively. This is carried out by using a reference index of the biomass of L. obtusifolium decreased by 10%, while the Cd threshold value needs to be further studied. L. obtusifolium would be an appropriate plant for phytoremediation of Cr-polluted soil, compared to Cd, Pb, and Zn absorption and accumulation. It showed optimal antioxidant enzyme activity and transfer ability under soil Cr contents of 300 mg/kg, and the growth of L. obtusifolium was not restricted. Therefore, L. obtusifolium was particularly suitable for phytoremediation of Cr pollution in areas in western China.

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Evidence of declining trees resilience under long term heavy metal stress combined with climate change heating

Cited by 23 publications

References 93 publications

Impact of forest fire on radial growth of tree rings and their element concentrations of Pinus sylvestris and Larix gmelinii in northern China

Impact of forest fire on radial growth of tree rings and their element concentrations of Pinus sylvestris and Larix gmelinii in northern China

Fine-Scale NDVI Reconstruction Back to 1906 from Tree-Rings in the Greater Yellowstone Ecosystem

Effects of Different Trace Elements on Ecophysiological Characteristics of Ligustrum obtusifolium Saplings

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