Internal tree cycling and atmospheric archiving of mercury: examination with concentration and stable isotope analyses

Biogeosciences, Год журнала: 2022, Номер 19(17), С. 4415 - 4429

Опубликована: Сен. 14, 2022

Abstract. Trees predominantly take up mercury (Hg) from the atmosphere via stomatal assimilation of gaseous elemental Hg (GEM). is oxidised in leaves/needles and transported to other tree anatomy including bole wood, where it can be stored long-term. Using associated with growth rings facilitates archiving historical GEM concentrations. Nonetheless, there are significant knowledge gaps on cycling within trees. We investigate archived rings, internal cycling, differences uptake mechanisms Norway spruce European larch sampled 1 km a HgCl2-contaminated site using total (THg) stable isotope analyses. Tree ring samples indicative increases THg concentrations (up 521 µg kg−1) background period (BGP; facility closed; 1992–present) secondary industrial (2ndIP; no HgCl2 wood treatment; 1962–1992) primary (1stIP; active ≈ 1900–1962). Mass-dependent fractionation (MDF) data shifted negative during periods (δ202Hg 1stIP: −4.32 ± 0.15 ‰, 2ndIP: −4.04 0.32 BGP: −2.83 0.74 ‰; SD). Even accounting for −2.6 ‰ MDF shift uptake, these emissions derived activity being enriched lighter isotopes reduction Hg0 volatilisation. Similar (δ202Hg: −3.90 0.30 SD) bark (137 105 suggests that downward transport also dominant mechanism (reflective stomatal-uptake shift) rather than deposition bark. was sapwood all trees across both species. This may indicate long-term storage fraction or xylem solution. observed small range odd-isotope mass-independent (MIF). Differences Δ199Hg between different activities were (Δ199Hg 0.00 0.03 −0.06 0.04 −0.13 SD), we suggest MIF signatures conserved (reflect source signatures). These advance our understanding physiological processing provide critical direction future research into use as archives atmospheric Hg.

Язык: Английский

---

Investigation of the biochemical controls on mercury uptake and mobility in trees

The Science of The Total Environment, Год журнала: 2022, Номер 851, С. 158101 - 158101

Опубликована: Авг. 18, 2022

Язык: Английский

---

Monitoring air pollution close to a cement plant and in a multi-source industrial area through tree-ring analysis

Environmental Science and Pollution Research, Год журнала: 2021, Номер 28(38), С. 54030 - 54040

Опубликована: Май 27, 2021

Thirty-two trace elements were examined in the tree rings of downy oak to evaluate pollution levels close a cement plant isolated rural context and an industrial area where multiple sources air are or present. Tree cores collected from trees growing 1 km both that located 8 each other. The analysis was performed on annual 1990 2016 using laser ablation inductively coupled plasma mass spectrometry. Trace Cs, Mg, Mn, S Zn reflected emission history plant. Their values have increased since early 2000s, when started its activity. However, lack significant trends pollutants possible effect translocation volatility some left open questions. very weak changes other period 1990-2016 suggest those do not mark any additional activity background pollution. results confirm plants must be considered forest archive accessible through dendrochemistry.

Язык: Английский

---

Long-term mercury variations in tree rings of the permafrost forest, northeastern China

Science China Earth Sciences, Год журнала: 2022, Номер 65(7), С. 1328 - 1338

Опубликована: Май 11, 2022

Язык: Английский

---

Assessment of tree-ring mercury radial translocation and age effect in Masson pine: Implications for historical atmospheric mercury reconstruction

Journal of Environmental Sciences, Год журнала: 2022, Номер 138, С. 266 - 276

Опубликована: Окт. 27, 2022

Язык: Английский

---

Tree rings recording historical atmospheric mercury: A review of progresses and challenges

Critical Reviews in Environmental Science and Technology, Год журнала: 2023, Номер 54(6), С. 445 - 462

Опубликована: Авг. 28, 2023

AbstractFoliage uptake of atmospheric elemental mercury (Hg0) and subsequent translocation by the phloem is main pathway for Hg accumulation in tree rings. Tree rings have been used as emerging natural archive to directly reconstruct centennial trends Hg0 level. The tree-ring records remote regions successfully reconstructed peak anthropogenic emissions Europe North America 1960s − 1970s distinct increase Asia since 1980s. Combining concentrations isotopic signatures would provide historical emission source shifts. mechanisms translocation, specifically radial impacts environmental physiological factors, are yet be clarified explain nonlinear relation between concentration signals Thus, we recommend trace processes their fractionation rings, examine relationship profile pollution level specific species. Finally, suggest develop more statistical models quantify on rings.Keywords: Mercuryisotopestree ringsinfluencing factorshistorical recordHANDLING EDITORS: Dan Tsang Lena Q. Ma Disclosure statementThe authors declare no competing financial interest.Additional informationFundingThis work was funded National Natural Science Foundation China [42122053 41977272] Chongqing [cstc2020jcyj-msxmX0063].

Язык: Английский

---

The Multi-Compartment Hg Modeling and Analysis Project (MCHgMAP): Mercury modeling to support international environmental policy

Опубликована: Май 24, 2024

Abstract. The Multi-Compartment Hg (mercury) Modeling and Analysis Project (MCHgMAP) is an international multi-model research initiative intended to simulate analyze the geospatial distributions temporal trends of environmental inform effectiveness evaluations two multilateral agreements (MEAs): Minamata Convention on Mercury (MC) Long-Range Transboundary Air Pollution (LRTAP). This MCHgMAP overview paper presents its science objectives, background rationale, experimental design (multi-model ensemble (MME) architecture, inputs evaluation data, simulations reporting framework), methodologies for analysis simulated levels. primary goals project are facilitate detection attribution recent (observed) future (projected) spatial patterns global levels, identification key knowledge gaps in modeling improve cycles MEAs. current advances challenges models, emission inventories, observational data examined, optimized introduced addressing policy questions A common set emissions, conditions, observation datasets proposed (where possible) enhance MME comparability. novel harmonized simulation approach between atmospheric, land, oceanic multi-media models developed account short- long-term changes secondary exchanges achieve mechanistic consistency levels across matrices. comprehensive model experiments prioritized ensure a systematic participation variety from scientific community.

Язык: Английский

---

Critical Analysis of the Past, Present, and Future of Dendrochemistry: A Systematic Literature Review

Forests, Год журнала: 2023, Номер 14(10), С. 1997 - 1997

Опубликована: Окт. 5, 2023

Dendrochemistry, the study of elements found within tree rings, has been used to understand environmental changes from both natural and anthropogenic sources. When appropriately, dendrochemistry can provide a greater understanding elemental in environment. However, species-specific processes have shown impact results, research field scrutinized due need for that role-specific such as translocation play. This systematic literature review examines dendrochemistry’s history, highlights how changed, hypothesizes where it might be headed. From this review, we recommend following measures: (1) promoting use new experimental techniques methods with faster data acquisition time allow number samples processed included studies increase statistical significance; (2) more focus on two- three-dimensional space trees grow consider complex physiological occurring over (3) lab-based reduce variables cannot controlled when sampling situ. Understanding challenges opportunities past, present, future is crucial advancement field.

Язык: Английский

---

Challenges in the Application of Dendrochemistry in Research on Historical Environmental Pollution in an Old Copper Mining Area

Forests, Год журнала: 2021, Номер 12(11), С. 1505 - 1505

Опубликована: Окт. 31, 2021

This research investigates the long-term environmental impact and historical temporal pollution patterns caused by a former copper mine in Iwiny (south-western Poland) using dendrochemical approach. An additional aspect of this was considering possibility inductively coupled plasma-optical emission spectrometry (ICP-OES) measurement technique as cheaper alternative to plasma mass (ICP-MS) analyses conducted mining areas. In study area, tailings storage facility (TSF) dam failure (1967) took place alkaline flotation waste containing high concentration Cu Pb are stored. Tree cores from pedunculate oak (Quercus robur L.) were analysed for content 11 trace elements (TEs) (Cd, Mn, Ni, Zn, Cr, Co, Pb, Cu, Fe, Al, Ag) ICP-OES technique, while tree rings’ widths (TRWs) also measured. Samples that most significant context goals verified with ICP-MS method. The results revealed strong industry reflected substantial increase mean contents of: (1) Fe industrial vs. control trees, (2) TRWs trees. However, observed TEs did not correspond known timing inputs (mining activity, spill). Peak levels Zn after closed. lack new sources relationship strongly suggests rings recorded chemical signal TSF reclamation (the use fertilizers agrotechnical interventions). Patterns 7 detected samples (Co Cd detected, Al Ag partly detected), all elements. Significant differences obtained Ag, Cd, Co. Despite challenges application dendrochemistry on old areas (e.g., trees), it has proved be useful tool investigating aggregate impact.

Язык: Английский

---

URBOECOSYSTEM ECOLOGICAL STATUS ASSESSMENT BY THE MORPHOLOGICAL PARAMETERS OF PICEA ABIES L. (ON THE EXAMPLE OF IVANO-FRANKIVSK CITY)

Biolohichni systemy, Год журнала: 2022, Номер 14(2), С. 166 - 171

Опубликована: Янв. 1, 2022

The bioindicative prospects of Picea abies L. in the conditions an urbanized environment are analyzed based on complex morphological parameters species' vitality. preference conifers as phytoindicators populated areas is substantiated due to peculiarities their physiology and structure. Simple, convenient informative phytoindicative markers vitality applied: weight, length type degree needle necrosis, well general sanitary condition species individuals. use indicators coniferous plants proposed alternative physiological biochemical methods biomonitoring, or analytical ecological monitoring urban environment. research conducted functional zones Ivano-Frankivsk city, selected principle basis zoning. A decrease needles mass transport routes zone residential development established by 1.9 1.6 times, relative background values, respectively. At same time, a constant parameter does not undergo significant compared area. In ecosystem state individuals observed following series zones: → greening routes. highest necrosis city's routes, while dominant apical. This sign heavy metals accumulation other anthropogenic pollutants at tips needles, which adaptive mechanism response stress. most common first fifth degrees. percentage with signs drying city - 39%. area this approximately 20%, 2%. class damage refers growing zone, second existing third fixed route city. promising biological indicator quality recommended for wider implementation practice ecosystems.

Язык: Английский

---