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Berg, Björn
Publications (10 of 12) Show all publications
Sun, T., Ciu, Y., Berg, B., Zhang, Q., Dong, L.-L., We, Z. & Zhang, L.-L. (2019). A test of manganese effects on decomposition in forest and cropland sites. Soil Biology and Biochemistry, 129, 178-183
Open this publication in new window or tab >>A test of manganese effects on decomposition in forest and cropland sites
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2019 (English)In: Soil Biology and Biochemistry, ISSN 0038-0717, E-ISSN 1879-3428, Vol. 129, p. 178-183Article in journal (Refereed) Published
Abstract [en]

Litter of plant origin is the main source of soil organic matter, and its physical and chemical quality and decomposition rates are key variables in the prediction and modelling of how litter-derived carbon (C) is cycling through the ecosystem. However, the biological control factors for decomposition are not well understood and often poorly represented in global C models. These are typically run using simple parameters, such as nitrogen (N) and lignin concentrations, characterizing the quality of the organic matter input to soils and its accessibility to decomposer organisms. Manganese (Mn) is a key component for the formation of manganese peroxidase (MnP), an important enzyme for lignin degradation. However, the functional role of Mn on plant litter decomposition has been rarely experimentally examined. Here, using a forest and a cropland site we studied, over 41 months, the effects of Mn fertilization on MnP activity and decomposition of eight substrates ranging in initial lignin concentrations from 9.8 to 44.6%. Asymptotic decomposition models fitted the mass loss data best and allowed us to separately compare the influence of Mn fertilization on different litter stages and pools. Across substrates, Mn fertilization stimulated decomposition rates of the late stage where lignin dominates decomposition, resulting in smaller fraction of slowly decomposing litter. The increased MnP activity caused by Mn fertilization provided the mechanism explaining the stimulated decomposition in the Mn-addition treatments.

Keywords
Keywords Cropland Decomposition Forest Lignin Manganese Manganese peroxidase
National Category
Biological Sciences
Identifiers
urn:nbn:se:hig:diva-28340 (URN)10.1016/j.soilbio.2018.11.018 (DOI)000457661000018 ()2-s2.0-85059321711 (Scopus ID)
Note

State Key Program of China  Grant no: 2016YFD0300904 and  2016YFA0600800Natural Science Foundation of China Grant no: 31500361,  31700397, and  31830015Key Research Program of Frontier Sciences of Chinese Academy of Sciences Grant no: QYZDB-SSW-DQC00

Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2019-09-30Bibliographically approved
De Marco, A., Berg, B., Zarrelli, A. & Virzo De Santo, A. (2019). Changes in soil C and N pools across a chronosequence on volcanic parent material following afforestation with Pinus pinea and Pinus nigra Arn.. Geoderma
Open this publication in new window or tab >>Changes in soil C and N pools across a chronosequence on volcanic parent material following afforestation with Pinus pinea and Pinus nigra Arn.
2019 (English)In: Geoderma, ISSN 0016-7061, E-ISSN 1872-6259Article in journal (Refereed) Submitted
Keywords
Forest floor; Mineral soil; Soluble C and N; Microbial C; Fungal Biomass; Basal Respiration
National Category
Biological Sciences
Identifiers
urn:nbn:se:hig:diva-30877 (URN)
Available from: 2019-11-04 Created: 2019-11-04 Last updated: 2019-11-05Bibliographically approved
Ge, J., Berg, B. & Xie, Z. (2019). Climatic seasonality is linked to the occurrence of the mixed evergreen and deciduous broad-leaved forests in China. Ecosphere, 10(9), Article ID e02862.
Open this publication in new window or tab >>Climatic seasonality is linked to the occurrence of the mixed evergreen and deciduous broad-leaved forests in China
2019 (English)In: Ecosphere, ISSN 2150-8925, E-ISSN 2150-8925, Vol. 10, no 9, article id e02862Article in journal (Refereed) Published
Abstract [en]

Abstract Evergreen and deciduous broad-leaved tree species can coexist across the globe and constitute different broad-leaved forests along large-scale geographical and climatic gradients. A better understanding of climatic influence on the distribution of mixed evergreen and deciduous broad-leaved forest is of fundamental importance when assessing this mixed forest's resilience and predicting potential dynamics of broad-leaved forests under future climate change. Here, we quantified the horizontal distribution of this mixed forest in mountains in relation to climate seasonality by compiling vegetation information from the earlier records and our own field sampling on major subtropical mountains of China. We found that the probability of occurrence of this forest in subtropical mountains was positively associated with the latitude but not the longitude. The occurrence probability of this forest was observed at high-temperature but not precipitation seasonality mountains. Temperature seasonality was five times more important than precipitation seasonality in explaining the total variation of occurrence of this mixed forest. For its distribution, our results shed light on that temperature seasonality was generally a more powerful predictor than precipitation seasonality for montane mixed forest distribution. Collectively, this study clearly underscores the important role of temperature seasonality, a previously not quantified climatic variable, in the occurrence of this mixed forest along geographical gradients and hence yields useful insight into our understanding of climate?vegetation relationships and climate change vulnerability assessment in a changing climate.

Place, publisher, year, edition, pages
John Wiley & Sons, 2019
Keywords
leaf habit, mixed forest, subtropical mountains, temperature seasonality, transition zone, vegetation zonation
National Category
Biological Sciences
Identifiers
urn:nbn:se:hig:diva-30800 (URN)10.1002/ecs2.2862 (DOI)000490766500026 ()
Note

Funding information:

National Key Research and Development Program of China. Grant Number: 2016YFC0503101

National Natural Science Foundation of China. Grant Number: 31600360

Strategic Priority Research Program of the Chinese Academy of Sciences. Grant Number: XDA19050402

Available from: 2019-10-16 Created: 2019-10-16 Last updated: 2019-11-05Bibliographically approved
Dong, L., Sun, T., Berg, B., Zhang, L., Zhang, Q. & Wang, Z. (2019). Effects of different forms of N deposition on leaf litter decomposition and extracellular enzyme activities in a temperate grassland. Soil Biology and Biochemistry, 134, 78-80
Open this publication in new window or tab >>Effects of different forms of N deposition on leaf litter decomposition and extracellular enzyme activities in a temperate grassland
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2019 (English)In: Soil Biology and Biochemistry, ISSN 0038-0717, E-ISSN 1879-3428, Vol. 134, p. 78-80Article in journal (Refereed) Published
Abstract [en]

Despite the importance of decomposition for biogeochemical cycles, it is still not clear how this process is affected by different forms of nitrogen (N). Equal amounts of N with different ratios of inorganic N: organic N (0 : 0, 10 : 0, 7 : 3, 5 : 5, 3 : 7, and 0 : 10) were added to the soil in a steppe. We studied the response of litter decomposition to different forms of N enrichment. The treatment with 30% organic N resulted in the fastest decomposition, which was higher than with inorganic N or organic N addition alone. Our results highlight the need for studies of N deposition on carbon cycles that consider different components in N deposition.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Litter decomposition, Inorganic nitrogen deposition, Organic nitrogen deposition, Extracellular enzyme activity, Grassland
National Category
Soil Science
Identifiers
urn:nbn:se:hig:diva-30506 (URN)10.1016/j.soilbio.2019.03.016 (DOI)000467508000009 ()2-s2.0-85063632088 (Scopus ID)
Available from: 2019-08-16 Created: 2019-08-16 Last updated: 2019-08-16Bibliographically approved
Berg, B., Sun, T., Johansson, M.-B., Sanborn, P., Ni, X. & Lönn, M. (2019). Magnesium dynamics in decomposing foliar litter - a synthesis. Geoderma
Open this publication in new window or tab >>Magnesium dynamics in decomposing foliar litter - a synthesis
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2019 (English)In: Geoderma, ISSN 0016-7061, E-ISSN 1872-6259Article in journal (Refereed) Submitted
Keywords
Litter, Decomposition, Magnesium, Mg dynamics, Mg release, Accumulated mass loss
National Category
Biological Sciences
Identifiers
urn:nbn:se:hig:diva-30878 (URN)
Available from: 2019-11-04 Created: 2019-11-04 Last updated: 2019-11-05Bibliographically approved
Gautam, M., Lee, K.-S., Berg, B. & Song, B. (2019). Spatial distribution of elements in the soil, vegetation and litter in a cool temperate ecosystem, South Korea. Chemosphere
Open this publication in new window or tab >>Spatial distribution of elements in the soil, vegetation and litter in a cool temperate ecosystem, South Korea
2019 (English)In: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298Article in journal (Refereed) Submitted
Keywords
Litter decomposition, Minor elements, Rare earth elements, Cool temperate, South Korea
National Category
Biological Sciences
Identifiers
urn:nbn:se:hig:diva-30876 (URN)
Available from: 2019-11-04 Created: 2019-11-04 Last updated: 2019-11-05Bibliographically approved
Gautam, M. K., Lee, K.-S., Berg, B., Song, B.-Y. & Yeon, J.-Y. (2019). Trends of major, minor and rare earth elements in decomposing litter in a cool temperate ecosystem, South Korea. Chemosphere, 222, 214-226
Open this publication in new window or tab >>Trends of major, minor and rare earth elements in decomposing litter in a cool temperate ecosystem, South Korea
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2019 (English)In: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Vol. 222, p. 214-226Article in journal (Refereed) Published
Abstract [en]

The decomposition dynamics of 34 different elements in four different litter types (foliar and woody litter) from Pinus densiflora (Korean red pine) and Castanea crenata (Korean chestnut) was investigated in a cool temperate ecosystem using the litterbag method. Two contrasting trends were observed in the dynamics of elements with accumulated mass loss of litter and carbon. Leaf litter of Korean chestnut, which was richer in elements, showed a general decrease in concentrations of elements with accumulated mass loss of litter and carbon on a dry mass basis during decomposition in the field. Other litter types, with initially lower concentrations of elements, exhibited an increase in concentration on a dry mass basis during field incubation. Highest relative increase in the concentration was noticed for the minor elements, and for the woody litters. Concentrations of major and minor elements increased by factors ranging from 1.07 for antimony (Sb) to 853.7 for vanadium (V). Rare earth elements (REE) concentrations increased by factors ranging from 1.04 for scandium (Sc) to 83.5 for thorium (Th). Our results suggest that litter type plays an important role for nutrient dynamics. Results from principal component analysis for major, minor, and rare earth elements showed grouping of elements and high correlation among them (P < 0.05), which suggests a common source. At both sites, element concentrations were high in the soil, especially for REE. This suggests that increase in element concentrations during field incubation probably was due to transfer of elements from soil to the overlying decomposing litter.

Keywords
Litter decomposition, Minor elements, Rare earth elements, Cool temperate, South Korea
National Category
Biological Sciences
Identifiers
urn:nbn:se:hig:diva-29375 (URN)10.1016/j.chemosphere.2019.01.114 (DOI)000462109200026 ()30708155 (PubMedID)2-s2.0-85060959928 (Scopus ID)
Note

Funding:

- National Agenda Program (NAP) of the National Research Council of Science and Technology- Korea Basic Science Institute Grant no: C34700 

Available from: 2019-03-12 Created: 2019-03-12 Last updated: 2019-08-12Bibliographically approved
Ji, H., Wen, J., Du, B., Sun, N., Berg, B. & Liu, C. (2018). Comparison of the nutrient resorption stoichiometry of Quercus variabilis Blume growing in two sites contrasting in soil phosphorus content. Annals of Forest Science, 75(2), Article ID 59.
Open this publication in new window or tab >>Comparison of the nutrient resorption stoichiometry of Quercus variabilis Blume growing in two sites contrasting in soil phosphorus content
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2018 (English)In: Annals of Forest Science, ISSN 1286-4560, E-ISSN 1297-966X, Vol. 75, no 2, article id 59Article in journal (Refereed) Published
Abstract [en]

Key message: Foliar phosphorus (P) resorption inQuercus variabilisBlume was significantly lower at a P-rich than at a P-deficient site. Moreover, P resorption strongly decreased, and nitrogen:phosphorus and carbon:phosphorus resorption ratios increased with soil P content. This demonstrates a strong link between foliar P resorption and P content in soils, and emphasizes the importance of P resorption in leaves of trees growing in soils with contrasted P content. Context: Subtropical ecosystems are generally characterized by P-deficient soils. However, P-rich soils develop in phosphate rock areas. Aims: We compared the patterns of nutrient resorption, in terms of ecological stoichiometry, for two sites naturally varying in soil P content. Methods: The resorption efficiency (percentage of a nutrient recovered from senescing leaves) and proficiency (level to which nutrient concentration is reduced in senesced leaves) of 12 elements were determined in two oak (Q. variabilis) populations growing at a P-rich or a P-deficient site in subtropical China. Results: P resorption efficiency dominated the intraspecific variation in nutrient resorption between the two sites. Q. variabilis exhibited a low P resorption at the P-rich site and a high P resorption at the P-deficient site. Both P resorption efficiency and proficiency strongly decreased with soil P content only and were positively related to the N:P and C:P ratios in green and senesced leaves. Moreover, resorption efficiency ratios of both N:P and C:P were positively associated with soil P. Conclusion: These results revealed a strong link between P resorption and P stoichiometry in response to a P deficiency in the soil, and a single- and limiting-element control pattern of P resorption. Hence, these results provide new insights into the role of P resorption in plant adaptations to geologic variations of P in the subtropics.

Place, publisher, year, edition, pages
Springer-Verlag France, 2018
Keywords
Ecological stoichiometry, Leaves, Nutrient resorption, Oak, Phosphate rocks, Quercus variabilis, Subtropics
National Category
Forest Science
Identifiers
urn:nbn:se:hig:diva-26788 (URN)10.1007/s13595-018-0727-5 (DOI)000432273100001 ()2-s2.0-85046905985 (Scopus ID)
Note

Funding agencies:

- National Key R&D Program of China Grant no: 2016YFC0502501- NSFC, National Natural Science Foundation of China Grant no: 31670626,  31270640 och 31070532

Available from: 2018-06-05 Created: 2018-06-05 Last updated: 2018-06-05Bibliographically approved
Sun, T., Hobbie, S., Berg, B., Zhank, H., Wang, Q., Wang, Z. & Hättenschwiler, S. (2018). Contrasting dynamics and trait controls in first-order root compared with leaf litter decomposition. Proceedings of the National Academy of Sciences of the United States of America, 115(41), 10392-10397
Open this publication in new window or tab >>Contrasting dynamics and trait controls in first-order root compared with leaf litter decomposition
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2018 (English)In: Proceedings of the National Academy of Sciences of the United States of America, ISSN 0027-8424, E-ISSN 1091-6490, Vol. 115, no 41, p. 10392-10397Article in journal (Refereed) Published
Abstract [en]

Decomposition is a key component of the global carbon (C) cycle, yet current ecosystem C models do not adequately represent the contributions of plant roots and their mycorrhizae to this process. The understanding of decomposition dynamics and their control by traits is particularly limited for the most distal first-order roots. Here we followed decomposition of first-order roots and leaf litter from 35 woody plant species differing in mycorrhizal type over 6 years in a Chinese temperate forest. First-order roots decomposed more slowly (k = 0.11 ± 0.01 years−1) than did leaf litter (0.35 ± 0.02 years−1), losing only 35% of initial mass on average after 6 years of exposure in the field. In contrast to leaf litter, nonlignin root C chemistry (nonstructural carbohydrates, polyphenols) accounted for 82% of the large interspecific variation in first-order root decomposition. Leaf litter from ectomycorrhizal (EM) species decomposed more slowly than that from arbuscular mycorrhizal (AM) species, whereas first-order roots of EM species switched, after 2 years, from having slower to faster decomposition compared with those from AM species. The fundamentally different dynamics and control mechanisms of first-order root decomposition compared with those of leaf litter challenge current ecosystem C models, the recently suggested dichotomy between EM and AM plants, and the idea that common traits can predict decomposition across roots and leaves. Aspects of C chemistry unrelated to lignin or nitrogen, and not presently considered in decomposition models, controlled first-order root decomposition; thus, current paradigms of ecosystem C dynamics and model parameterization require revision.

National Category
Other Natural Sciences
Identifiers
urn:nbn:se:hig:diva-28274 (URN)10.1073/pnas.1716595115 (DOI)000446764200065 ()30254167 (PubMedID)2-s2.0-85054777294 (Scopus ID)
Note

Funding agencies:

State Key Program of China Grant Number 2016YFD0300904;  2016YFA0600800

Natural Science Foundation of China Grant Number 31500361;  31830015

Key Research Program of Frontier Sciences of the Chinese Academy of Sciences  Grant Number QYZDB-SSW-DQC002

Available from: 2018-10-11 Created: 2018-10-11 Last updated: 2018-11-28Bibliographically approved
Djukic, I., Kepfer-Rojas, S., Kappel Schmidt, I., Steenberg Larsen, K., Beier, C., Berg, B. & Verheyen, K. (2018). Early stage litter decomposition across biomes. Science of the Total Environment, 628-629, 1369-1394
Open this publication in new window or tab >>Early stage litter decomposition across biomes
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2018 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 628-629, p. 1369-1394Article in journal (Refereed) Published
Abstract [en]

Through litter decomposition enormous amounts of carbon is emitted to the atmosphere. Numerous large-scale decomposition experiments have been conducted focusing on this fundamental soil process in order to understand the controls on the terrestrial carbon transfer to the atmosphere. However, previous studies were mostly based on site-specific litter and methodologies, adding major uncertainty to syntheses, comparisons and meta-analyses across different experiments and sites. In the TeaComposition initiative, the potential litter decomposition is investigated by using standardized substrates (Rooibos and Green tea) for comparison of litter mass loss at 336 sites (ranging from −9 to +26 °C MAT and from 60 to 3113 mm MAP) across different ecosystems. In this study we tested the effect of climate (temperature and moisture), litter type and land-use on early stage decomposition (3 months) across nine biomes. We show that litter quality was the predominant controlling factor in early stage litter decomposition, which explained about 65% of the variability in litter decomposition at a global scale. The effect of climate, on the other hand, was not litter specific and explained <0.5% of the variation for Green tea and 5% for Rooibos tea, and was of significance only under unfavorable decomposition conditions (i.e. xeric versus mesic environments). When the data were aggregated at the biome scale, climate played a significant role on decomposition of both litter types (explaining 64% of the variation for Green tea and 72% for Rooibos tea). No significant effect of land-use on early stage litter decomposition was noted within the temperate biome. Our results indicate that multiple drivers are affecting early stage litter mass loss with litter quality being dominant. In order to be able to quantify the relative importance of the different drivers over time, long-term studies combined with experimental trials are needed.

Keywords
Tea bag, Green tea, Rooibos tea, Carbon turnover, TeaComposition initiative
National Category
Soil Science
Identifiers
urn:nbn:se:hig:diva-26237 (URN)10.1016/j.scitotenv.2018.01.012 (DOI)000432462000135 ()30045558 (PubMedID)2-s2.0-85042424360 (Scopus ID)
Available from: 2018-03-15 Created: 2018-03-15 Last updated: 2018-12-05Bibliographically approved
Projects
Smart solutions for fruit growers [2014-05046_Vinnova]; University of Gävle; Publications
Bui, T. T. A., Wright, S. A. I., Falk, A. B., Vanwalleghem, T., Van Hemelrijck, W., Hertog, M. L. .., . . . Davey, M. W. (2019). Botrytis cinerea differentially induces postharvest antioxidant responses in 'Braeburn' and 'Golden Delicious' apple fruit. Journal of the Science of Food and Agriculture, 99(13), 5662-5670
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