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https://www.readbyqxmd.com/read/29751430/tree-ring-formation-as-an-indicator-of-forest-capacity-to-adapt-to-the-main-threats-of-environmental-changes-in-lithuania
#1
Algirdas Augustaitis, Ingrida Augustaitienė, Manuela Baugarten, Steigvilė Bičenkienė, Raselė Girgždienė, Gintaras Kulbokas, Edgaras Linkevičius, Vitas Marozas, Marius Mikalajūnas, Genrik Mordas, Gintautas Mozgeris, Edmundas Petrauskas, Ainis Pivoras, Giedrius Šidlauskas, Vidmantas Ulevičius, Adomas Vitas, Rainer Matyssek
Global changes occurring under different environmental conditions have changed stand competition, as well as nutrient and light availability, which has resulted in changes in productivity. Therefore, in the present study, the characteristics of tree-ring width formation of the prevailing Lithuanian tree species, Norway spruce, Scots pine and silver and downy birch, and key factors resulting in their differences during the last 36-year period were investigated at forest sites located on poor mineral oligotrophic and on nutrient-rich organic mesoeutrophic soils...
February 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29721262/thinning-induced-canopy-opening-exerted-a-specific-effect-on-soil-nematode-community
#2
Bing Yang, Xueyong Pang, Weikai Bao, Kexin Zhou
Changes in microclimate, soil physicochemical properties, understory vegetation cover, diversity, and composition as well as soil microbial community resulting from silvicultural practices are expected to alter soil food webs. Here, we investigated whether and how contrasting-sized canopy openings affect soil nematode community within a 30 year-aged spruce plantation. The results indicated that the responses of soil nematodes to canopy opening size were dependant on their feeding habit. The abundance of total nematodes and that of free-living nematodes was negatively correlated with soil bulk density, whereas the abundance of omnivore-predators was negatively correlated with soil bulk density and shrubs cover, respectively...
April 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29684041/public-perceptions-about-climate-change-mitigation-in-british-columbia-s-forest-sector
#3
Guillaume Peterson St-Laurent, Shannon Hagerman, Robert Kozak, George Hoberg
The role of forest management in mitigating climate change is a central concern for the Canadian province of British Columbia. The successful implementation of forest management activities to achieve climate change mitigation in British Columbia will be strongly influenced by public support or opposition. While we now have increasingly clear ideas of the management opportunities associated with forest mitigation and some insight into public support for climate change mitigation in the context of sustainable forest management, very little is known with respect to the levels and basis of public support for potential forest management strategies to mitigate climate change...
2018: PloS One
https://www.readbyqxmd.com/read/29666770/applying-foliar-stoichiometric-traits-of-plants-to-determine-fertilization-for-a-mixed-pine-oak-stand-in-the-qinling-mountains-china
#4
Lin Hou, Zhenjie Dong, Yuanyuan Yang, Donghong Zhang, Shengli Zhang, Shuoxin Zhang
Background: The Chinese Natural Forest Protection program has been conducted nationwide and has achieved resounding success. However, timber importation has increased; therefore, producing more domestic timber is critical to meet the demand for raw materials. Fertilization is one of the most effective silviculture practices used to improve tree and stand growth. However, determining the appropriate type and amount of elements is necessary for effective fertilization of big timber in different forest types and environmental conditions...
2018: PeerJ
https://www.readbyqxmd.com/read/29660227/the-limited-contribution-of-large-trees-to-annual-biomass-production-in-an-old-growth-tropical-forest
#5
Gauthier Ligot, Sylvie Gourlet-Fleury, Dakis-Yaoba Ouédraogo, Xavier Morin, Sébastien Bauwens, Fidele Baya, Yves Brostaux, Jean-Louis Doucet, Adeline Fayolle
Although the importance of large trees regarding biodiversity and carbon stock in old-growth forests is undeniable, their annual contribution to biomass production and carbon uptake remains poorly studied at the stand level. To clarify the role of large trees in biomass production, we used data of tree growth, mortality and recruitment monitored during 20 years in 10×4-ha plots in a species rich tropical forest (Central African Republic). Using a random block design, three different silvicultural treatments, control, logged, and logged + thinned, were applied in the 10 plots...
April 16, 2018: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/29658095/compatible-above-ground-biomass-equations-and-carbon-stock-estimation-for-small-diameter-turkish-pine-pinus-brutia-ten
#6
Oytun Emre Sakici, Omer Kucuk, Muhammad Irfan Ashraf
Small trees and saplings are important for forest management, carbon stock estimation, ecological modeling, and fire management planning. Turkish pine (Pinus brutia Ten.) is a common coniferous species and comprises 25.1% of total forest area of Turkey. Turkish pine is also important due to its flammable fuel characteristics. In this study, compatible above-ground biomass equations were developed to predict needle, branch, stem wood, and above-ground total biomass, and carbon stock assessment was also described for Turkish pine which is smaller than 8 cm diameter at breast height or shorter than breast height...
April 15, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29579292/do-atmospheric-co2-concentration-increase-climate-and-forest-management-affect-iwue-of-common-beech-evidences-from-carbon-isotope-analyses-in-tree-rings
#7
Negar Rezaie, Ettore D'Andrea, Achim Bräuning, Giorgio Matteucci, Pierluigi Bombi, Marco Lauteri
Beech is one of the most important forest tree species in Europe, hence possible adverse factors affecting its physiology and productivity can have strong ecological and economic impacts. In this context, four beech forests along a latitudinal gradient from southern Apennines to middle European lowlands were selected for chronological determinations of carbon isotope composition (δ13C) in tree-ring cellulose. The main objectives of this study were to assess (i) the effect of climate on the carbon signature of tree-ring cellulose (δ13C); (ii) the physiological response to recent CO2 concentration increment and to climatic variation; and (iii) the relationship between intrinsic water-use efficiency (iWUE, here the average long-term ratio of net photosynthesis to stomatal conductance) and growth of trees in different sites since 1950...
March 22, 2018: Tree Physiology
https://www.readbyqxmd.com/read/29560524/efo-lci-a-new-life-cycle-inventory-database-of-forestry-operations-in-europe
#8
Giuseppe Cardellini, Tatiana Valada, Claire Cornillier, Estelle Vial, Marian Dragoi, Venceslas Goudiaby, Volker Mues, Bruno Lasserre, Arkadiusz Gruchala, Per Kristian Rørstad, Mathias Neumann, Miroslav Svoboda, Risto Sirgmets, Olli-Pekka Näsärö, Frits Mohren, Wouter M J Achten, Liesbet Vranken, Bart Muys
Life cycle assessment (LCA) has become a common methodology to analyze environmental impacts of forestry systems. Although LCA has been widely applied to forestry since the 90s, the LCAs are still often based on generic Life Cycle Inventory (LCI). With the purpose of improving LCA practices in the forestry sector, we developed a European Life Cycle Inventory of Forestry Operations (EFO-LCI) and analyzed the available information to check if within the European forestry sector national differences really exist...
March 20, 2018: Environmental Management
https://www.readbyqxmd.com/read/29522460/mapping-wildfire-ignition-probability-using-sentinel-2-and-lidar-jerte-valley-c%C3%A3-ceres-spain
#9
Yolanda Sánchez Sánchez, Antonio Martínez-Graña, Fernando Santos Francés, Marina Mateos Picado
Wildfire is a major threat to the environment, and this threat is aggravated by different climatic and socioeconomic factors. The availability of detailed, reliable mapping and periodic and immediate updates makes wildfire prevention and extinction work more effective. An analyst protocol has been generated that allows the precise updating of high-resolution thematic maps. For this protocol, images obtained through the Sentinel 2A satellite, with a return time of five days, have been merged with Light Detection and Ranging (LiDAR) data with a density of 0...
March 9, 2018: Sensors
https://www.readbyqxmd.com/read/29420843/conserving-and-managing-the-subnivium
#10
Benjamin Zuckerberg, Jonathan N Pauli
In regions where snowfall historically has been a defining seasonal characteristic of the landscape, warming winters have reduced the depth, duration, and extent of snowpack. However, most management and conservation has focused on how aboveground wildlife will be affected by altered snow conditions, even though the majority of species that persist through the winter do so under the snowpack in a thermally stable refugium: the subnivium. Shortened winters, forest management practices, and winter recreation can alter subnivium conditions by increasing snow compaction and compromising thermal stability at the soil-snow interface...
February 8, 2018: Conservation Biology: the Journal of the Society for Conservation Biology
https://www.readbyqxmd.com/read/29375792/comparing-the-effects-of-even-and-uneven-aged-silviculture-on-ecological-diversity-and-processes-a-review
#11
REVIEW
Philippe Nolet, Daniel Kneeshaw, Christian Messier, Martin Béland
With an increasing pressure on forested landscapes, conservation areas may fail to maintain biodiversity if they are not supported by the surrounding managed forest matrix. Worldwide, forests are managed by one of two broad approaches-even- and uneven-aged silviculture. In recent decades, there has been rising public pressure against the systematic use of even-aged silviculture (especially clear-cutting) because of its perceived negative esthetic and ecological impacts. This led to an increased interest for uneven-aged silviculture...
January 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29375758/how-to-deal-with-ground-truthing-affected-by-human-induced-habitat-change-identifying-high-quality-habitats-for-the-critically-endangered-red-siskin
#12
Ada Sánchez-Mercado, Kathryn M Rodríguez-Clark, Jhonathan Miranda, José Rafael Ferrer-Paris, Brian Coyle, Samuel Toro, Arlene Cardozo-Urdaneta, Michael J Braun
Species distribution models (SDM) can be valuable for identifying key habitats for conservation management of threatened taxa, but anthropogenic habitat change can undermine SDM accuracy. We used data for the Red Siskin ( Spinus cucullatus ), a critically endangered bird and ground truthing to examine anthropogenic habitat change as a source of SDM inaccuracy. We aimed to estimate: (1) the Red Siskin's historic distribution in Venezuela; (2) the portion of this historic distribution lost to vegetation degradation; and (3) the location of key habitats or areas with both, a high probability of historic occurrence and a low probability of vegetation degradation...
January 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29364572/intermediate-severity-wind-disturbance-in-mature-temperate-forests-legacy-structure-carbon-storage-and-stand-dynamics
#13
Garrett W Meigs, William S Keeton
Wind is one of the most important natural disturbances influencing forest structure, ecosystem function, and successional processes worldwide. This study quantifies the stand-scale effects of intermediate-severity windstorms (i.e., blowdowns) on (1) live and dead legacy structure, (2) aboveground carbon storage, and (3) tree regeneration and associated stand dynamics at four mature, mixed hardwood-conifer forest sites in the northeastern United States. We compare wind-affected forests to adjacent reference conditions (i...
April 2018: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/29275284/harnessing-landscape-heterogeneity-for-managing-future-disturbance-risks-in-forest-ecosystems
#14
Rupert Seidl, Katharina Albrich, Dominik Thom, Werner Rammer
In order to prevent irreversible impacts of climate change on the biosphere it is imperative to phase out the use of fossil fuels. Consequently, the provisioning of renewable resources such as timber and biomass from forests is an ecosystem service of increasing importance. However, risk factors such as changing disturbance regimes are challenging the continuous provisioning of ecosystem services, and are thus a key concern in forest management. We here used simulation modeling to study different risk management strategies in the context of timber production under changing climate and disturbance regimes, focusing on a 8127 ha forest landscape in the Northern Front Range of the Alps in Austria...
March 1, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29245533/-i-oligoaeschna-i-i-sirindhornae-i-sp-nov-a-new-dragonfly-species-from-thailand-odonata-anisoptera-aeshnidae
#15
Robin W J Ngiam, Albert G Orr
Oligoaeschna sirindhornae sp. nov. is described from a male from Sakaerat Silvicultural Research Station, Nakhon Ratchasima Province in Thailand. It is the only known Oligoaeschna species recorded from Thailand since Oligoaeschna pramoti (Yeh, 2000) and Oligoaeschna minuta (Hämäläinen & Pinratana, 1999) were transferred to the genus Sarasaeschna.
November 22, 2017: Zootaxa
https://www.readbyqxmd.com/read/29111258/effectiveness-of-mechanical-thinning-and-prescribed-burning-on-fire-behavior-in-pinus-nigra-forests-in-ne-spain
#16
Míriam Piqué, Rut Domènech
Fuel treatments can mitigate present and future impacts of climate change by reducing fire intensity and severity. In recent years, Pinus nigra forests in the Mediterranean basin have been dramatically affected by the new risk of highly intense and extreme fires and its distribution area has been reduced. New tools are necessary for assessing the management of these forests so they can adapt to the challenges to come. Our main goal was to evaluate the effects of different fuel treatments on Mediterranean Pinus nigra forests...
October 27, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28961436/assessing-the-effect-of-pruning-and-thinning-on-crown-fire-hazard-in-young-atlantic-maritime-pine-forests
#17
Andrea Hevia, Alejandra Crabiffosse, Juan Gabriel Álvarez-González, Ana Daria Ruiz-González, Juan Majada
Management of fuel to minimize crown fire hazard is a key challenge in Atlantic forests, particularly for pine species. However, a better understanding of effectiveness of silvicultural treatments, especially forest pruning, for hazard reduction is required. Here we evaluate pruning and thinning as two essential silvicultural treatments for timber pine forests. Data came from a network of permanent plots of young maritime pine stands in northwestern Spain. Vertical profiles of canopy bulk density were estimated for field data and simulated scenarios of pruning and thinning using individual tree biomass equations...
January 1, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/28961435/uneven-aged-silviculture-can-enhance-within-stand-heterogeneity-and-beetle-diversity
#18
Klara Joelsson, Joakim Hjältén, Timothy Work
Uneven-aged silviculture may better maintain species assemblages associated with old-growth forests than clear felling in part due to habitat heterogeneity created by maintaining standing retention strips adjacent to harvest trails. Retention strips and harvest trails created at the time of tree removal will likely have different microclimate and may harbor different assemblages. In some cases, the resultant stand heterogeneity associated with uneven-aged silviculture may be similar to natural small-scale disturbances...
January 1, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/28857736/cryptosporangium-eucalypti-sp-nov-an-actinomycete-isolated-from-eucalyptus-camaldulensis-roots
#19
Winanda Himaman, Paweena Suksaard, Ratchanee Mingma, Atsuko Matsumoto, Kannika Duangmal
A novel actinomycete, designated strain EURKPP3H10T, was isolated from surface-sterilized roots of Eucalyptus camaldulensis Dehnh., collected from Kamphaengphet Silvicultural Research Station, Kamphaengphet province, Thailand. The taxonomic position of strain EURKPP3H10T was studied using a polyphasic approach. Phylogenetic evaluation based on 16S rRNA gene sequence analysis showed that strain EURKPP3H10T belongs to the genus Cryptosporangium, with the highest sequence similarity to Cryptosporangium cibodasense LIPI11-2-Ac046T (99...
August 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28762033/inducible-somatic-embryogenesis-in-theobroma-cacao-achieved-using-the-dex-activatable-transcription-factor-glucocorticoid-receptor-fusion
#20
Morgan E Shires, Sergio L Florez, Tina S Lai, Wayne R Curtis
OBJECTIVES: To carry out mass propagation of superior plants to improve agricultural and silvicultural production though advancements in plant cell totipotency, or the ability of differentiated somatic plant cells to regenerate an entire plant. RESULTS: The first demonstration of a titratable control over somatic embryo formation in a commercially relevant plant, Theobroma cacao (Chocolate tree), was achieved using a dexamethasone activatable chimeric transcription factor...
November 2017: Biotechnology Letters
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