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La Cava S, Rijllo G, Zucco G, Innocenti S, Guasti M, Puletti N, Ferrara C, Scalercio S. Moths in space: The below-canopy structure of forest drives abundance and mobility-related traits of moth communities. Sci Total Environ 2024; 921:171056. [PMID: 38382613 DOI: 10.1016/j.scitotenv.2024.171056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 02/15/2024] [Accepted: 02/15/2024] [Indexed: 02/23/2024]
Abstract
The distribution of species is primarily driven by the availability of trophic resources. In a given forest type, insects trophically related to the dominant tree are expected to be evenly distributed due to the abundance of their foodplant. However, their distribution is also influenced by complex relationships with abiotic and biotic parameters such as available space, predatory pressure, and morphometric traits. In this study, we investigated how the three-dimensional structure of space below the canopy may affect the composition of nocturnal lepidoptera communities. To synthesise the complexity of the dispersal behaviour of these insects, we evaluated easily measurable traits such as wingspan and the presence of tympanic organs, both connected to their mobility and thus potentially influenced by the structure of the available flight space. The study was conducted in the Sila National Park (Italy), where 12 sampling sites were selected in pine forests and an additional 12 in beech forests. Forest spatial structure was investigated using a portable terrestrial laser scanner. Moths were sampled monthly using light traps from May to October in both 2019 and 2020. Among measured forest traits, we observed that the space above three meters from the ground is the only factor influencing community composition. Larger species with tympanic organs prefer environments with less space below tree canopies. Our findings could be the starting point for future studies that investigate a potential defence strategy of moths against bats, as tympanate and larger species not only actively avoid chiropter predation but could also choose denser forests because of a lower bat activity. Moths' distribution and community composition thus appear to be significantly shaped by the spatial structure of forests.
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Affiliation(s)
- Sara La Cava
- Council for agricultural research and economics, Research Centre for Forestry and Wood, I-87036 Rende, Italy.
| | - Giuseppe Rijllo
- Council for agricultural research and economics, Research Centre for Forestry and Wood, I-87036 Rende, Italy
| | - Giada Zucco
- Council for agricultural research and economics, Research Centre for Forestry and Wood, I-87036 Rende, Italy
| | - Simone Innocenti
- Council for agricultural research and economics, Research Centre for Forestry and Wood, I-52100 Arezzo, Italy
| | - Matteo Guasti
- Council for agricultural research and economics, Research Centre for Forestry and Wood, I-52100 Arezzo, Italy
| | - Nicola Puletti
- Council for agricultural research and economics, Research Centre for Forestry and Wood, I-52100 Arezzo, Italy
| | - Carlotta Ferrara
- Council for agricultural research and economics, Research Centre for Forestry and Wood, I-00166 Rome, Italy
| | - Stefano Scalercio
- Council for agricultural research and economics, Research Centre for Forestry and Wood, I-87036 Rende, Italy
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Song G, Wang Q, Jin J. Including leaf trait information helps empirical estimation of jmax from vcmax in cool-temperate deciduous forests. Plant Physiol Biochem 2021; 166:839-848. [PMID: 34229164 DOI: 10.1016/j.plaphy.2021.06.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 03/21/2021] [Accepted: 06/29/2021] [Indexed: 06/13/2023]
Abstract
Understanding the uncertainty in the parameterization of the two photosynthetic capacity parameters, leaf maximum carboxylation rate (Vcmax), and maximum electron transport rate (Jmax), is crucial for modeling and predicting carbon fluxes in terrestrial ecosystems. In gas exchange models, to date, Jmax is typically estimated from Vcmax based on a linear regression. However, recent studies have revealed that this relationship varies, dependent upon species, leaf groups, and time, so it is doubtful that the regression applies universally. Furthermore, far less is known regarding how other leaf traits affect the regression. In this study we analyzed the two key photosynthetic parameters and popularly measurable leaf traits, leaf chlorophyll concentration and leaf mass per area (LMA), of cool-temperate forest stands in Japan, aiming to construct a simple regression applicable to temperate deciduous forests, at least. The analysis was based on a long-term field dataset covering years of data for both sunlit and shaded leaves at different altitudes. Results showed that the best-fitted slope of the regression differed markedly from those previously reported, which were typically acquired from sunlit leaves. LMA had a significant effect on the regression, producing the lowest root mean square errors and the highest ratio of performance to deviation values (RPD = 2.017). Although more data are needed to validate in other ecosystems, our approach at least provides a promising way to substantially improve photosynthesis model predictions, by introducing leaf traits into the popular empirical regression of Jmax against Vcmax, and ultimately to better understand the functioning of the photosynthetic machinery.
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Affiliation(s)
- Guangman Song
- Graduate School of Science and Technology, Shizuoka University, Shizuoka, 422-8529, Japan
| | - Quan Wang
- Faculty of Agriculture, Shizuoka University, Shizuoka, 422-8529, Japan; Research Institute of Green Science and Technology, Shizuoka University, Shizuoka, 422-8529, Japan.
| | - Jia Jin
- Faculty of Agriculture, Shizuoka University, Shizuoka, 422-8529, Japan
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3
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Weber JN, Kaufholdt D, Minner-Meinen R, Bloem E, Shahid A, Rennenberg H, Hänsch R. Impact of wildfires on SO 2 detoxification mechanisms in leaves of oak and beech trees. Environ Pollut 2021; 272:116389. [PMID: 33433339 DOI: 10.1016/j.envpol.2020.116389] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 12/22/2020] [Accepted: 12/23/2020] [Indexed: 06/12/2023]
Abstract
Frequency and intensity of wildfire occurrences are dramatically increasing worldwide due to global climate change, having a devastating effect on the entire ecosystem including plants. Moreover, distribution of fire-smoke can influence the natural environment over very long distances, i.e. hundreds of kilometres. Dry plant matter contains 0.1-0.9% (w/w) sulphur, which is mainly released during combustion into the atmosphere as sulphur dioxide (SO2) resulting in local concentrations of up to 3000 nL L-1. SO2 is a highly hazardous gas, which enters plants mostly via the stomata. Toxic sulphite is formed inside the leaves due to conversion of SO2. Plants as sessile organisms cannot escape from threats, why they evolved an impressive diversity of molecular defence mechanisms. In the present study, two recent wildfires in Germany were evaluated to analyse the effect of SO2 released into the atmosphere on deciduous trees: the Meppen peat fire in 2018 and the forest fire close to Luebtheen in 2019. Collected leaf material from beech (Fagus sylvatica) and oak (Quercus robur) was examined with respect to detoxification of sulphur surplus due to the exposure to elevated SO2. An induced stress reaction in both species was indicated by a 1.5-fold increase in oxidized glutathione. In beech leaves, the enzymatic activities of the sulphite detoxification enzymes sulphite oxidase and apoplastic peroxidases were increased 5-fold and a trend of sulphate accumulation was observed. In contrast, oaks did not regulate these enzymes during smoke exposure, however, the constitutive activity is 10-fold and 3-fold higher than in beech. These results show for the first time sulphite detoxification strategies of trees in situ after natural smoke exposure. Beech and oak trees survived short-term SO2 fumigation due to exclusion of toxic gases and different oxidative detoxification strategies. Beeches use efficient upregulation of oxidative sulphite detoxification enzymes, while oaks hold a constitutively high enzyme-pool available.
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Affiliation(s)
- Jan-Niklas Weber
- Institut für Pflanzenbiologie Technische Universität Braunschweig, Humboldtstraße 1, D-38106, Braunschweig, Germany.
| | - David Kaufholdt
- Institut für Pflanzenbiologie Technische Universität Braunschweig, Humboldtstraße 1, D-38106, Braunschweig, Germany.
| | - Rieke Minner-Meinen
- Institut für Pflanzenbiologie Technische Universität Braunschweig, Humboldtstraße 1, D-38106, Braunschweig, Germany.
| | - Elke Bloem
- Institute for Crop and Soil Science Julius Kühn-Institut (JKI), Federal Research Centre for Cultivated Plants, Bundesallee 69, D-38116, Braunschweig, Germany.
| | - Afsheen Shahid
- Institut für Forstwissenschaften, Albert-Ludwigs-Universität Freiburg, Georges-Köhler Allee 53/54, D-79110, Freiburg, Germany.
| | - Heinz Rennenberg
- Institut für Forstwissenschaften, Albert-Ludwigs-Universität Freiburg, Georges-Köhler Allee 53/54, D-79110, Freiburg, Germany; Center of Molecular Ecophysiology (CMEP), College of Resources and Environment, Southwest University, Tiansheng Road No. 2, 400715, Chongqing, Beibei District, PR China.
| | - Robert Hänsch
- Institut für Pflanzenbiologie Technische Universität Braunschweig, Humboldtstraße 1, D-38106, Braunschweig, Germany; Center of Molecular Ecophysiology (CMEP), College of Resources and Environment, Southwest University, Tiansheng Road No. 2, 400715, Chongqing, Beibei District, PR China.
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Jung MY, Lee DE, Baek SH, Lim SM, Chung IM, Han JG, Kim SH. An unattended HS-SPME-GC-MS/MS combined with a novel sample preparation strategy for the reliable quantitation of C8 volatiles in mushrooms: A sample preparation strategy to fully control the volatile emission. Food Chem 2021; 347:128998. [PMID: 33453580 DOI: 10.1016/j.foodchem.2020.128998] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 11/30/2020] [Accepted: 12/30/2020] [Indexed: 11/30/2022]
Abstract
Eight carbon (C8) compounds are the key characteristic flavors of mushrooms. The quantitative analysis of the volatiles in mushrooms is challenging especially with the unattended HS-SPME-GC-MS. An unattended HS-SPME-GC-MS/MS in combination with novel sample preparation of the complete control of volatile emissions was developed for the quantitation of the C8 volatiles in mushrooms. The sample preparation strategy was composed of freeze-drying, rehydration, and the addition of a 15% citric acid solution. With this strategy, the volatile emission from mushroom was fully controlled at a certain time point. This method was found to be highly reliable, sensitive, precise, and accurate. This method was successfully applied to measure the contents of the C8 volatiles in the beech, button, and shiitake mushrooms. 1-Octene-3-ol was the most predominant compound in the mushrooms, representing 62.4, 69.0, and 89.2% of the total C8 volatiles in the beech, button, and shiitake mushrooms, respectively.
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Affiliation(s)
- Mun Yhung Jung
- Department of Food Science and Biotechnology, Graduate School, Woosuk University, 443 Samnye-ro, Samnye-eup, Wanju-gun, Jeonbuk Province 55338, Republic of Korea.
| | - Da Eun Lee
- Department of Food Science and Biotechnology, Graduate School, Woosuk University, 443 Samnye-ro, Samnye-eup, Wanju-gun, Jeonbuk Province 55338, Republic of Korea; Institute of Jinan Red Ginseng, Jinan-gun, Jeonbuk Province, Republic of Korea
| | - Sun Hye Baek
- Department of Food Science and Biotechnology, Graduate School, Woosuk University, 443 Samnye-ro, Samnye-eup, Wanju-gun, Jeonbuk Province 55338, Republic of Korea
| | - Su Min Lim
- Department of Food Science and Biotechnology, Graduate School, Woosuk University, 443 Samnye-ro, Samnye-eup, Wanju-gun, Jeonbuk Province 55338, Republic of Korea
| | - Ill-Min Chung
- Department of Crop Science, College of Sanghuh Life Science, Kunkuk University, Seoul, Republic of Korea
| | - Jae-Gu Han
- National Institute of Horticultural and Herbal Science, Rural Development Administration, Eumsung, Chungbuk Province, Republic of Korea
| | - Seung-Hyun Kim
- Department of Crop Science, College of Sanghuh Life Science, Kunkuk University, Seoul, Republic of Korea
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Leitner S, Dirnböck T, Kobler J, Zechmeister-Boltenstern S. Legacy effects of drought on nitrate leaching in a temperate mixed forest on karst. J Environ Manage 2020; 262:110338. [PMID: 32250815 DOI: 10.1016/j.jenvman.2020.110338] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 02/13/2020] [Accepted: 02/23/2020] [Indexed: 06/11/2023]
Abstract
With climate change the occurrence of summer droughts is expected to increase in Central Europe. This could lead to increased nitrate (NO3-) leaching when water scarcity affects the N-uptake capacity of trees and increases soil N availability due to early leaf senescence and higher litter input. In the present study, we used 16 years of ecological monitoring data from the LTER research site "Zöbelboden" in Austria. The monitoring site is a mixed Spruce-Sycamore-Ash-Beech forest on karst, which is representative for many watersheds that supply drinking water in Austria. We found that in the year after a summer drought, NO3- leaching via soil water seepage was significantly elevated compared to the long-term mean. While in normal years, NO3- leaching was primarily affected by soil water seepage volume, after a summer drought these controls changed and NO3- leaching was controlled by NO3- input via precipitation, tree N uptake, and vapor-pressure deficit. Furthermore, higher aboveground litter input during dry years was correlated with increased NO3- leaching in the following year. Our findings show that NO3- leaching from temperate mountain forests on karst is susceptible to summer drought, which could affect drinking water quality in the Central European Alps in the future, especially in combination with forest disturbances like bark beetle outbreaks, which are often a direct consequence of drought damage to trees.
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Affiliation(s)
- Sonja Leitner
- University of Natural Resources and Life Sciences Vienna (BOKU), Institute of Soil Research, Peter Jordan-Straße 82, 1190, Vienna, Austria; Mazingira Centre, International Livestock Research Institute, Box 30709, Old Naivasha Road, 00100, Nairobi, Kenya
| | - Thomas Dirnböck
- Environment Agency Austria, Department for Ecosystem Research and Environmental Information Management, Spittelauer Lände 5, 1090, Vienna, Austria.
| | - Johannes Kobler
- Environment Agency Austria, Department for Ecosystem Research and Environmental Information Management, Spittelauer Lände 5, 1090, Vienna, Austria
| | - Sophie Zechmeister-Boltenstern
- University of Natural Resources and Life Sciences Vienna (BOKU), Institute of Soil Research, Peter Jordan-Straße 82, 1190, Vienna, Austria
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Worth JRP, Liu L, Wei FJ, Tomaru N. The complete chloroplast genome of Fagus crenata (subgenus Fagus) and comparison with F. engleriana (subgenus Engleriana). PeerJ 2019; 7:e7026. [PMID: 31211014 PMCID: PMC6557254 DOI: 10.7717/peerj.7026] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 04/24/2019] [Indexed: 11/20/2022] Open
Abstract
This study reports the whole chloroplast genome of Fagus crenata (subgenus Fagus), a foundation tree species of Japanese temperate forests. The genome has a total of 158,227 bp containing 111 genes, including 76 protein-coding genes, 31 tRNA genes and 4 ribosomal RNA genes. Comparison with the only other published Fagus chloroplast genome, F. engeleriana (subgenus Engleriana) shows that the genomes are relatively conserved with no inversions or rearrangements observed while the proportion of nucleotide sites differing between the two species was equal to 0.0018. The six most variable regions were, in increasing order of variability, psbK-psbI, trnG-psbfM, rpl32, trnV, ndhI-ndh and ndhD-psaC. These highly variable chloroplast regions in addition to 160 chloroplast microsatellites identified (of which 46 were variable between the two species) will provide useful genetic resources for studies of the inter- and intra-specific genetic structure and diversity of this important northern hemisphere tree genus.
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Affiliation(s)
- James R P Worth
- Department of Forest Molecular Genetics and Biotechnology, Forestry and Forest Products Research Institute, Tsukuba, Japan
| | - Luxian Liu
- Key Laboratory of Plant Stress Biology, Laboratory of Plant Germplasm and Genetic Engineering, College of Life Sciences, Henan University, Kaifeng, China
| | - Fu-Jin Wei
- Department of Forest Molecular Genetics and Biotechnology, Forestry and Forest Products Research Institute, Tsukuba, Japan
| | - Nobuhiro Tomaru
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
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Ding Y, Wang C, Chaos M, Chen R, Lu S. Estimation of beech pyrolysis kinetic parameters by Shuffled Complex Evolution. Bioresour Technol 2016; 200:658-665. [PMID: 26551654 DOI: 10.1016/j.biortech.2015.10.082] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 10/24/2015] [Accepted: 10/26/2015] [Indexed: 06/05/2023]
Abstract
The pyrolysis kinetics of a typical biomass energy feedstock, beech, was investigated based on thermogravimetric analysis over a wide heating rate range from 5K/min to 80K/min. A three-component (corresponding to hemicellulose, cellulose and lignin) parallel decomposition reaction scheme was applied to describe the experimental data. The resulting kinetic reaction model was coupled to an evolutionary optimization algorithm (Shuffled Complex Evolution, SCE) to obtain model parameters. To the authors' knowledge, this is the first study in which SCE has been used in the context of thermogravimetry. The kinetic parameters were simultaneously optimized against data for 10, 20 and 60K/min heating rates, providing excellent fits to experimental data. Furthermore, it was shown that the optimized parameters were applicable to heating rates (5 and 80K/min) beyond those used to generate them. Finally, the predicted results based on optimized parameters were contrasted with those based on the literature.
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Affiliation(s)
- Yanming Ding
- State Key Laboratory of Fire Science, University of Science and Technology of China, Heifei 230027, China
| | - Changjian Wang
- School of Civil Engineering, Hefei University of Technology, Hefei 230009, China
| | - Marcos Chaos
- FM Global, Research Division, 1151 Boston-Providence Turnpike, Norwood, MA 02062, USA
| | - Ruiyu Chen
- State Key Laboratory of Fire Science, University of Science and Technology of China, Heifei 230027, China
| | - Shouxiang Lu
- State Key Laboratory of Fire Science, University of Science and Technology of China, Heifei 230027, China.
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Guerrieri R, Vanguelova EI, Michalski G, Heaton THE, Mencuccini M. Isotopic evidence for the occurrence of biological nitrification and nitrogen deposition processing in forest canopies. Glob Chang Biol 2015; 21:4613-4626. [PMID: 26146936 DOI: 10.1111/gcb.13018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 06/11/2015] [Accepted: 06/16/2015] [Indexed: 05/28/2023]
Abstract
This study examines the role of tree canopies in processing atmospheric nitrogen (Ndep ) for four forests in the United Kingdom subjected to different Ndep : Scots pine and beech stands under high Ndep (HN, 13-19 kg N ha(-1) yr(-1) ), compared to Scots pine and beech stands under low Ndep (LN, 9 kg N ha(-1) yr(-1) ). Changes of NO3 -N and NH4 -N concentrations in rainfall (RF) and throughfall (TF) together with a quadruple isotope approach, which combines δ(18) O, Δ(17) O and δ(15) N in NO3 (-) and δ(15) N in NH4 (+) , were used to assess N transformations by the canopies. Generally, HN sites showed higher NH4 -N and NO3 -N concentrations in RF compared to the LN sites. Similar values of δ(15) N-NO3 (-) and δ(18) O in RF suggested similar source of atmospheric NO3 (-) (i.e. local traffic), while more positive values for δ(15) N-NH4 (+) at HN compared to LN likely reflected the contribution of dry NHx deposition from intensive local farming. The isotopic signatures of the N-forms changed after interacting with tree canopies. Indeed, (15) N-enriched NH4 (+) in TF compared to RF at all sites suggested that canopies played an important role in buffering dry Ndep also at the low Ndep site. Using two independent methods, based on δ(18) O and Δ(17) O, we quantified for the first time the proportion of NO3 (-) in TF, which derived from nitrification occurring in tree canopies at the HN site. Specifically, for Scots pine, all the considered isotope approaches detected biological nitrification. By contrast for the beech, only using the mixing model with Δ(17) O, we were able to depict the occurrence of nitrification within canopies. Our study suggests that tree canopies play an active role in the N cycling within forest ecosystems. Processing of Ndep within canopies should not be neglected and needs further exploration, with the combination of multiple isotope tracers, with particular reference to Δ(17) O.
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Affiliation(s)
- Rossella Guerrieri
- Earth Systems Research Center, University of New Hampshire, Morse Hall, 8 College Rd, Durham, NH, 03824, USA
- School of GeoSciences, University of Edinburgh, Crew Building, West Mains Road, Edinburgh, EH9 3JN, UK
| | - Elena I Vanguelova
- Centre of Ecosystem, Society and Biosecurity, Forest Research, Alice Holt Lodge, Farnham, Surrey, GU10 4LH, UK
| | - Greg Michalski
- Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, 550 Stadium Mell Drive, West Lafayette, IN, 47907, USA
| | - Timothy H E Heaton
- NERC Isotope Geosciences Laboratory, British Geological Survey, Keyworth, Nottingham, NG12 5GG, UK
| | - Maurizio Mencuccini
- School of GeoSciences, University of Edinburgh, Crew Building, West Mains Road, Edinburgh, EH9 3JN, UK
- ICREA at CREAF, Cerdanyola del Valles, 08023, Barcelona, Spain
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Gruba P, Socha J, Błońska E, Lasota J. Effect of variable soil texture, metal saturation of soil organic matter (SOM) and tree species composition on spatial distribution of SOM in forest soils in Poland. Sci Total Environ 2015; 521-522:90-100. [PMID: 25829288 DOI: 10.1016/j.scitotenv.2015.03.100] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 03/09/2015] [Accepted: 03/09/2015] [Indexed: 05/13/2023]
Abstract
In this study we investigated the effect of fine (ϕ<0.05mm) fraction, i.e., silt+clay (FF) content in soils, site moisture, metal (Al and Fe) of soil organic matter (SOM) and forest species composition on the spatial distribution of carbon (C) pools in forest soils at the landscape scale. We established 275 plots in regular 200×200m grid in a forested area of 14.4km(2). Fieldwork included soil sampling of the organic horizon, mineral topsoil and subsoil down to 40cm deep. We analysed the vertical and horizontal distribution of soil organic carbon (SOC) stocks, as well as the quantity of physically separated fractions including the free light (fLF), occluded light (oLF) and mineral associated fractions (MAF) in the mineral topsoil (A, AE) horizons. Distribution of C in soils was predominantly affected by the variation in the FF content. In soils richer in the FF more SOC was accumulated in mineral horizons and less in the organic horizons. Accumulation of SOC in mineral soil was also positively affected by the degree of saturation of SOM with Al and Fe. The increasing share of beech influenced the distribution of C stock in soil profiles by reducing the depth of O horizon and increasing C stored in mineral soil. The content of FF was positively correlated with the content of C in MAF and fLF fractions. The content of oLF and MAF fractions was also positively influenced by a higher degree of metal saturation, particularly Al. Our results confirmed that Al plays an important role in the stabilization of SOM inside aggregates (CoLF) and as in CMAF fractions. We also found a significant, positive effect of beech on the CfLF and fir on the CoLF content.
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Affiliation(s)
- Piotr Gruba
- Department of Forest Soil Science, University of Agriculture, Al. 29 Listopada 46, Krakow 31-425, Poland.
| | - Jarosław Socha
- Department of Biometry and Forest Productivity, University of Agriculture, Al. 29 Listopada 46, Krakow 31-425, Poland
| | - Ewa Błońska
- Department of Forest Soil Science, University of Agriculture, Al. 29 Listopada 46, Krakow 31-425, Poland
| | - Jarosław Lasota
- Department of Forest Soil Science, University of Agriculture, Al. 29 Listopada 46, Krakow 31-425, Poland
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10
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Hofmann T, Nebehaj E, Albert L. The high-performance liquid chromatography/multistage electrospray mass spectrometric investigation and extraction optimization of beech (Fagus sylvatica L.) bark polyphenols. J Chromatogr A 2015; 1393:96-105. [PMID: 25840663 DOI: 10.1016/j.chroma.2015.03.030] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 03/11/2015] [Accepted: 03/11/2015] [Indexed: 11/25/2022]
Abstract
The aim of the present work was the high-performance liquid chromatographic separation and multistage mass spectrometric characterization of the polyphenolic compounds of beech bark, as well as the extraction optimization of the identified compounds. Beech is a common and widely used material in the wood industry, yet its bark is regarded as a by-product. Using appropriate extraction methods these compounds could be extracted and utilized in the future. Different extraction methods (stirring, sonication, microwave assisted extraction) using different solvents (water, methanol:water 80:20 v/v, ethanol:water 80:20 v/v) and time/temperature schedules have been compared basing on total phenol contents (Folin-Ciocâlteu) and MRM peak areas of the identified compounds to investigate optimum extraction efficiency. Altogether 37 compounds, including (+)-catechin, (-)-epicatechin, quercetin-O-hexoside, taxifolin-O-hexosides (3), taxifolin-O-pentosides (4), B-type (6) and C-type (6) procyanidins, syringic acid- and coumaric acid-di-O-glycosides, coniferyl alcohol- and sinapyl alcohol-glycosides, as well as other unknown compounds with defined [M-H](-) m/z values and MS/MS spectra have been tentatively identified. The choice of the method, solvent system and time/temperature parameters favors the extraction of different types of compounds. Pure water can extract compounds as efficiently as mixtures containing organic solvents under high-pressure and high temperature conditions. This supports the implementation of green extraction methods in the future. Extraction times that are too long and high temperatures can result in the decrease of the concentrations. Future investigations will focus on the evaluation of the antioxidant capacity and utilization possibilities of the prepared extracts.
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Affiliation(s)
- Tamás Hofmann
- University of West-Hungary, Faculty of Forestry, Institute of Chemistry, Bajcsy-Zsilinszky u. 4, 9400 Sopron, Hungary.
| | - Esztella Nebehaj
- University of West-Hungary, Faculty of Forestry, Institute of Chemistry, Bajcsy-Zsilinszky u. 4, 9400 Sopron, Hungary
| | - Levente Albert
- University of West-Hungary, Faculty of Forestry, Institute of Chemistry, Bajcsy-Zsilinszky u. 4, 9400 Sopron, Hungary
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Allen RB, Hurst JM, Portier J, Richardson SJ. Elevation-dependent responses of tree mast seeding to climate change over 45 years. Ecol Evol 2014; 4:3525-37. [PMID: 25478145 PMCID: PMC4224528 DOI: 10.1002/ece3.1210] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 08/01/2014] [Accepted: 08/05/2014] [Indexed: 12/04/2022] Open
Abstract
We use seed count data from a New Zealand mono-specific mountain beech forest to test for decadal trends in seed production along an elevation gradient in relation to changes in climate. Seedfall was collected (1965 to 2009) from seed trays located on transect lines at fixed elevations along an elevation gradient (1020 to 1370 m). We counted the number of seeds in the catch of each tray, for each year, and determined the number of viable seeds. Climate variables were obtained from a nearby (<2 km) climate station (914-m elevation). Variables were the sum or mean of daily measurements, using periods within each year known to correlate with subsequent interannual variation in seed production. To determine trends in mean seed production, at each elevation, and climate variables, we used generalized least squares (GLS) regression. We demonstrate a trend of increasing total and viable seed production, particularly at higher elevations, which emerged from marked interannual variation. Significant changes in four seasonal climate variables had GLS regression coefficients consistent with predictions of increased seed production. These variables subsumed the effect of year in GLS regressions with a greater influence on seed production with increasing elevation. Regression models enforce a view that the sequence of climate variables was additive in their influence on seed production throughout a reproductive cycle spanning more than 2 years and including three summers. Models with the most support always included summer precipitation as the earliest variable in the sequence followed by summer maximum daily temperatures. We interpret this as reflecting precipitation driven increases in soil nutrient availability enhancing seed production at higher elevations rather than the direct effects of climate, stand development or rising atmospheric CO2 partial pressures. Greater sensitivity of tree seeding at higher elevations to changes in climate reveals how ecosystem responses to climate change will be spatially variable.
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Affiliation(s)
| | | | - Jeanne Portier
- Centre d'Etude de la Forêt, Université du Québec à Montréal C.P. 8888, Montréal, Québec, H3C 3P8, Canada
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del Río M, Schütze G, Pretzsch H. Temporal variation of competition and facilitation in mixed species forests in Central Europe. Plant Biol (Stuttg) 2014; 16:166-176. [PMID: 23581485 DOI: 10.1111/plb.12029] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 02/23/2013] [Indexed: 06/02/2023]
Abstract
Facilitation, reduced competition or increased competition can arise in mixed stands and become essential to the performance of these stands when compared to pure stands. Facilitation and over-yielding are widely held to prevail on poor sites, whereas neutral interactions or competition, leading to under-yielding of mixed versus pure stands, can occur on fertile sites. While previous studies have focused on the spatial variation of mixing effects, we examine the temporal variation of facilitation and competition and its effect on growth. The study is based on tree ring measurement on cores from increment borings from 559 trees of Norway spruce (Picea abies [L.] Karst.), European beech (Fagus sylvatica [L.]) and sessile oak (Quercus petraea (Matt.) Liebl.) in southern Germany, half of which were in pure stands and half in adjacent mixed stands. Mean basal area growth indices were calculated from tree ring measurements for pure and mixed stands for every species and site. The temporal variation, with positive correlations between species-specific growth indices during periods of low growth and neutral or negative correlations during periods of high growth, is more distinct in mixed than in neighbouring pure stands. We provide evidence that years with low growth trigger over-yielding of trees in mixed as opposed to pure stands, while years with high growth lead to under-yielding. We discuss the relevance of the results in terms of advancing our understanding and modelling of mixed stands, extension of the stress gradient hypothesis, and the performance of mixed versus pure stands in the face of climate change.
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Affiliation(s)
- M del Río
- Departamento de Selvicultura y Gestión de Sistemas Forestales INIA-CIFOR, Madrid, Spain
- Sustainable Forest Management Research Institute UVa-INIA, Madrid, Spain
| | - G Schütze
- Center of Life and Food Sciences Weihenstephan, Technische Universität München, Freising, Bavaria, Germany
| | - H Pretzsch
- Center of Life and Food Sciences Weihenstephan, Technische Universität München, Freising, Bavaria, Germany
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