Using Pinus uncinata to monitor tropospheric ozone in the Pyrenees

Kefauver, Shawn C.; Peñuelas, Josep; Ribas, Àngela; Díaz-de-Quijano, Maria; Ustin, Susan L.

doi:10.1016/j.ecolind.2013.07.024

Cited by 11 publications

(3 citation statements)

References 44 publications

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“…Based on the outputs of our study we can confirm that visible O3 injury increases with rising altitude (Díaz-de-Quijano et al, 2009;Benham et al, 2010;Kefauver et al, 2014). A fact that O3 concentrations and O3 uptake into the foliar tissues rise with altitude is supported by many previous studies (Chevalier et al, 2004;Bičárová et al, 2013).…”

Section: Discussionsupporting

confidence: 77%

How does soil water availability control phytotoxic O<sub>3</sub> dose to montane pines? Modelling and experimental study from two contrasting climatic regions in Europe

Bíčárová

Sitková

Pavlendová

et al. 2017

Preprint

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Abstract. Montane forests are exposed to high ambient ozone (O3) concentrations that may adversely affect physiological processes in internal cells when O3 molecules enter the plants through the stomata. This study addresses the model results of Phytotoxic Ozone Dose metric (POD) based on estimation of stomatal O3 flux to dwarf mountain pine (Pinus mugo) and Swiss stone pine (Pinus cembra). We focused on two different bioclimatic regions: (1) the temperate mountain forests in the High 15 Tatra Mts (SK-HT) of the Western Carpathians, and (2) the Mediterranean forests of the Alpes-Mercantour (FR-Alp) in the Alpes-Maritimes. Field measurement of O3 concentration and meteorological data incorporated into deposition model DO3SEshowed lower O3 flux in FR-Alp than in SK-HT plots for the 2016 growing season. Model outputs showed that soil humidity play a key role in stomatal O3 uptake by montane pines at the alpine timberline. We found that temperate climatic conditions in SK-HT with sufficient precipitation did not limit stomatal conductivity and O3 uptake of P. mugo and P. cembra. On the 20 other hand, the Mediterranean mountain climate characterised by warm and dry summer reduced stomatal conductance of pines in FR-Alp. POD without threshold limitation i.e. POD0 as a recently developed biologically sounded O3 metric varied near around and below critical level (CLef) depending upon different conditions of sunshine exposure in SK-HT plots. Field observation at these plots showed relatively weak visible O3 injury on P. cembra (2 % and 7 %) when compared with P. mugo (8 % and 18 %) for one year (C+1) and two year (C+2) old needles, respectively. Despite of low POD0 values, clearly below 25 CLef, the highest level of visible O3 damage on average from 10 % (C+1) to 25 % (C+2) was observed on P. cembra needles in Mediterranean (FR-Alp) area. Further research is needed to clarify the effect of real soil moisture regime on stomatal closure in dry areas (FR-Alp) and resistance of pine species against visible O3 injury in wet subalpine zones (SK-HT). More attention should be paid to O3 fluxes covering a year-round growing season as well as intra-daily dynamics, especially the night hours, since these time spans appear to play significant role in O3 uptake by mountain conifers. 30Atmos. Chem. Phys. Discuss., https://doi

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Section: Discussionsupporting

confidence: 77%

How does soil water availability control phytotoxic O<sub>3</sub> dose to montane pines? Modelling and experimental study from two contrasting climatic regions in Europe

Bíčárová

Sitková

Pavlendová

et al. 2017

Preprint

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“…The sampling sites were located every 200 m in altitude in a forested area dominated by Pinus uncinata and in relatively accessible sites to facilitate fortnightly sampling(for further details about the sampling locations and procedure see Diaz- de-Quijano et al, 2009). Radiello radial symmetry passive samplers (Cocheo et al, 1996) (Kefauver et al, 2014). We used the sum of mean fortnightly O 3 concentrations for 2004-2008 for comparison with estimates of crown defoliation and tree mortality.…”

Section: Characterisation Of Site Conditionsmentioning

confidence: 99%

Visible ozone-like injury, defoliation, and mortality in two Pinus uncinata stands in the Catalan Pyrenees (NE Spain)

et al. 2016

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Ozone concentrations in the Pyrenees have exceeded the thresholds for forest protection since 1994. We surveyed the severity of visible O 3 injuries, crown defoliation, and tree mortality of Pinus uncinata, the dominant species in subalpine forests in this mountain range, along two altitudinal and O 3 gradients in the central Catalan Pyrenees and analysed their relationships with the local environmental conditions. The severity of visible O 3 injuries increased with increasing mean annual [O 3 ] when summer water availability was high (summer Precipitation/Potential evapotranspiration above 0.96) whereas higher [O 3 ] did not produce more visible injuries during drier conditions. Mean crown defoliation and tree mortality ranged between 20.4-66.4 and 0.6-29.6%, respectively, depending on the site. Both were positively correlated with the accumulated O 3 exposure during the last five years and with variables associated with soil-water availability, which favours greater O 3 uptake by increasing stomatal conductance. The results indicate that O 3 contributed to the crown defoliation and tree mortality, although further research is clearly warranted to determine the contributions of the multiple stress factors to crown defoliation and mortality in P. uncinata stands in the Catalan Pyrenees.

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“…In the western United States, significant work has been done using pines as bioindicators of ozone damage [9]. Additionally, symptoms such as chlorotic mottling in conifer species have been used to monitor tropospheric ozone in the Pyrenees Mountains in Spain [10]. The impact of ozone on trees is covered in detail by Matyssek et al [11].…”

Section: Introductionmentioning

confidence: 99%

Using Visual Ozone Damage Scores and Spectroscopy to Quantify Soybean Responses to Background Ozone

et al. 2019

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Remotely-sensed identification of ozone stress in crops can allow for selection of ozone resistant genotypes, improving yields. This is critical as population, food demand, and background tropospheric ozone are projected to increase over the next several decades. Visual scores of common ozone damage have been used to identify ozone-stress in bio-indicator plants. This paper evaluates the use of a visual scoring metric of ozone damage applied to soybeans. The scoring of the leaves is then combined with hyperspectral data to identify spectral indices specific to ozone damage. Two genotypes of soybean, Dwight and Pana, that have shown different sensitivities to ozone, were grown and visually scored for ozone-specific damage on multiple dates throughout the growing season. Leaf reflectance, foliar biophysical properties, and yield data were collected. Additionally, ozone bio-indicator plants, snap beans, and common milkweed, were investigated with visual scores and hyperspectral leaf data for comparison. The normalized difference spectral index (NDSI) was used to identify the significant bands in the visible (VIS), near infrared (NIR), and shortwave infrared (SWIR) that best correlated with visual damage score when used in the index. Results were then compared to multiple well-established indices. Indices were also evaluated for correlation with seed and pod weight. The ozone damage scoring metric for soybeans evaluated in August had a coefficient of determination of 0.60 with end-of-season pod weight and a Pearson correlation coefficient greater than 0.6 for photosynthetic rate, stomatal conductance, and transpiration. NDSI [R558, R563] correlated best with visual scores of ozone damage in soybeans when evaluating data from all observation dates. These wavelengths were similar to those identified as most sensitive to visual damage in August when used in NDSI (560 nm, 563 nm). NDSI [R560, R563] in August had the highest coefficient of determination for individual pod weight (R2 = 0.64) and seed weight (R2 = 0.54) when compared against 21 well-established indices used for identification of pigment or photosynthetic stress in plants. When evaluating use of spectral bands in NDSI, longer wavelengths in SWIR were identified as more sensitive to ozone visual damage. Trends in the bands and biophysical properties of the soybeans combined with evaluation of ozone data indicate likely timing of significant ozone damage as after late-July for this season. This work has implications for better spectral detection of ozone stress in crops and could help with efforts to identify ozone tolerant varieties to increase future yield.

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Using Pinus uncinata to monitor tropospheric ozone in the Pyrenees

Cited by 11 publications

References 44 publications

How does soil water availability control phytotoxic O<sub>3</sub> dose to montane pines? Modelling and experimental study from two contrasting climatic regions in Europe

How does soil water availability control phytotoxic O<sub>3</sub> dose to montane pines? Modelling and experimental study from two contrasting climatic regions in Europe

Visible ozone-like injury, defoliation, and mortality in two Pinus uncinata stands in the Catalan Pyrenees (NE Spain)

Using Visual Ozone Damage Scores and Spectroscopy to Quantify Soybean Responses to Background Ozone

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Using Pinus uncinata to monitor tropospheric ozone in the Pyrenees

Cited by 11 publications

References 44 publications

How does soil water availability control phytotoxic O&lt;sub&gt;3&lt;/sub&gt; dose to montane pines? Modelling and experimental study from two contrasting climatic regions in Europe

How does soil water availability control phytotoxic O&lt;sub&gt;3&lt;/sub&gt; dose to montane pines? Modelling and experimental study from two contrasting climatic regions in Europe

Visible ozone-like injury, defoliation, and mortality in two Pinus uncinata stands in the Catalan Pyrenees (NE Spain)

Using Visual Ozone Damage Scores and Spectroscopy to Quantify Soybean Responses to Background Ozone

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How does soil water availability control phytotoxic O<sub>3</sub> dose to montane pines? Modelling and experimental study from two contrasting climatic regions in Europe

How does soil water availability control phytotoxic O<sub>3</sub> dose to montane pines? Modelling and experimental study from two contrasting climatic regions in Europe