keyword
MENU ▼
Read by QxMD icon Read
search

silviculture

keyword
https://www.readbyqxmd.com/read/28501014/discrimination-between-acute-and-chronic-decline-of-central-european-forests-using-map-algebra-of-the-growth-condition-and-forest-biomass-fuzzy-sets-a-case-study
#1
Pavel Samec, Jan Caha, Miloš Zapletal, Pavel Tuček, Pavel Cudlín, Miloš Kučera
Forest decline is either caused by damage or else by vulnerability due to unfavourable growth conditions or due to unnatural silvicultural systems. Here, we assess forest decline in the Czech Republic (Central Europe) using fuzzy functions, fuzzy sets and fuzzy rating of ecosystem properties over a 1×1km grid. The model was divided into fuzzy functions of the abiotic predictors of growth conditions (Fpred including temperature, precipitation, acid deposition, soil data and relative site insolation) and forest biomass receptors (Frec including remote sensing data, density and volume of aboveground biomass, and surface humus chemical data)...
May 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28484603/recognition-of-endophytic-trichoderma-species-by-leaf-cutting-ants-and-their-potential-in-a-trojan-horse-management-strategy
#2
Silma L Rocha, Harry C Evans, Vanessa L Jorge, Lucimar A O Cardoso, Fernanda S T Pereira, Fabiano B Rocha, Robert W Barreto, Adam G Hart, Simon L Elliot
Interactions between leaf-cutting ants, their fungal symbiont (Leucoagaricus) and the endophytic fungi within the vegetation they carry into their colonies are still poorly understood. If endophytes antagonistic to Leucoagaricus were found in plant material being carried by these ants, then this might indicate a potential mechanism for plants to defend themselves from leaf-cutter attack. In addition, it could offer possibilities for the management of these important Neotropical pests. Here, we show that, for Atta sexdens rubropilosa, there was a significantly greater incidence of Trichoderma species in the vegetation removed from the nests-and deposited around the entrances-than in that being transported into the nests...
April 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28411568/projecting-biodiversity-and-wood-production-in-future-forest-landscapes-15-key-modeling-considerations
#3
Adam Felton, Thomas Ranius, Jean-Michel Roberge, Karin Öhman, Tomas Lämås, Jari Hynynen, Artti Juutinen, Mikko Mönkkönen, Urban Nilsson, Tomas Lundmark, Annika Nordin
A variety of modeling approaches can be used to project the future development of forest systems, and help to assess the implications of different management alternatives for biodiversity and ecosystem services. This diversity of approaches does however present both an opportunity and an obstacle for those trying to decide which modeling technique to apply, and interpreting the management implications of model output. Furthermore, the breadth of issues relevant to addressing key questions related to forest ecology, conservation biology, silviculture, economics, requires insights stemming from a number of distinct scientific disciplines...
April 12, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28376249/elevated-auxin-and-reduced-cytokinin-contents-in-rootstocks-improve-their-performance-and-grafting-success
#4
Wei Li, Chu Fang, Sanalkumar Krishnan, Junmei Chen, Hao Yu, Angus S Murphy, Emily Merewitz, Lorenzo Katin-Grazzini, Richard J McAvoy, Ziniu Deng, Janice Zale, Yi Li
Plant grafting is an important technique for horticultural and silvicultural production. However, many rootstock plants suffer from undesirable lateral bud outgrowth, low grafting success rates, or poor rooting. Here we used a root-predominant gene promoter (SbUGT) to drive the expression of a tryptophan-2-mono oxygenase gene (iaaM) from Agrobacterium tumafaciens to increase auxin levels in tobacco. The transgenic plants, when used as a rootstock, displayed inhibited lateral bud outgrowth, enhanced grafting success rate, and improved root initiation...
April 4, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28369644/species-characteristics-and-intraspecific-variation-in-growth-and-photosynthesis-of-cryptomeria-japonica-under-elevated-o3-and-co2
#5
Yuichiro Hiraoka, Taiichi Iki, Mine Nose, Hiroyuki Tobita, Kenichi Yazaki, Atsushi Watanabe, Yoshitake Fujisawa, Mitsutoshi Kitao
In order to predict the effects of future atmospheric conditions on forest productivity, it is necessary to clarify the physiological responses of major forest tree species to high concentrations of ozone (O3) and carbon dioxide (CO2). Furthermore, intraspecific variation of these responses should also be examined in order to predict productivity gains through tree improvements in the future. We investigated intraspecific variation in growth and photosynthesis of Cryptomeria japonica D. Don, a major silviculture species in Japan, in response to elevated concentrations of O3 (eO3) and CO2 (eCO2), separately and in combination...
March 21, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28295816/functional-diversity-response-to-hardwood-forest-management-varies-across-taxa-and-spatial-scales
#6
Bryan D Murray, Jeffrey D Holland, Keith S Summerville, John B Dunning, Michael R Saunders, Michael A Jenkins
Contemporary forest management offers a trade-off between the potential positive effects of habitat heterogeneity on biodiversity, and the potential harm to mature forest communities caused by habitat loss and perforation of the forest canopy. While the response of taxonomic diversity to forest management has received a great deal of scrutiny, the response of functional diversity is largely unexplored. However, functional diversity may represent a more direct link between biodiversity and ecosystem function...
March 15, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28236260/varying-rotation-lengths-in-northern-production-forests-implications-for-habitats-provided-by-retention-and-production-trees
#7
Adam Felton, Johan Sonesson, Urban Nilsson, Tomas Lämås, Tomas Lundmark, Annika Nordin, Thomas Ranius, Jean-Michel Roberge
Because of the limited spatial extent and comprehensiveness of protected areas, an increasing emphasis is being placed on conserving habitats which promote biodiversity within production forest. For this reason, alternative silvicultural programs need to be evaluated with respect to their implications for forest biodiversity, especially if these programs are likely to be adopted. Here we simulated the effect of varied rotation length and associated thinning regimes on habitat availability in Scots pine and Norway spruce production forests, with high and low productivity...
April 2017: Ambio
https://www.readbyqxmd.com/read/28207174/species-distribution-models-may-misdirect-assisted-migration-insights-from-the-introduction-of-douglas-fir-to-europe
#8
Juliette Boiffin, Vincent Badeau, Nathalie Bréda
Species distribution models (SDMs), which statistically relate species occurrence to climatic variables, are widely used to identify areas suitable for species growth under future climates and to plan for assisted migration. When SDMs are projected across times or spaces, it is assumed that species climatic requirements remain constant. However, empirical evidence supporting this assumption is rare, and SDM predictions could be biased. Historical human-aided movements of tree species can shed light on the reliability of SDM predictions in planning for assisted migration...
March 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28192454/incorporating-exposure-to-pitch-canker-disease-to-support-management-decisions-of-pinus-pinaster-ait-in-the-face-of-climate-change
#9
María Jesús Serra-Varela, Ricardo Alía, Javier Pórtoles, Julián Gonzalo, Mario Soliño, Delphine Grivet, Rosa Raposo
Climate change is gravely affecting forest ecosystems, resulting in large distribution shifts as well as in increasing infection diseases and biological invasions. Accordingly, forest management requires an evaluation of exposure to climate change that should integrate both its abiotic and biotic components. Here we address the implications of climate change in an emerging disease by analysing both the host species (Pinus pinaster, Maritime pine) and the pathogen's (Fusarium circinatum, pitch canker) environmental suitability i...
2017: PloS One
https://www.readbyqxmd.com/read/28185607/robustness-of-plant-insect-herbivore-interaction-networks-to-climate-change-in-a-fragmented-temperate-forest-landscape
#10
K W Bähner, K A Zweig, I R Leal, R Wirth
Forest fragmentation and climate change are among the most severe and pervasive forms of human impact. Yet, their combined effects on plant-insect herbivore interaction networks, essential components of forest ecosystems with respect to biodiversity and functioning, are still poorly investigated, particularly in temperate forests. We addressed this issue by analysing plant-insect herbivore networks (PIHNs) from understories of three managed beech forest habitats: small forest fragments (2.2-145 ha), forest edges and forest interior areas within three continuous control forests (1050-5600 ha) in an old hyper-fragmented forest landscape in SW Germany...
February 10, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28109300/knowledge-attitudes-and-practices-in-tamarind-tamarindus-indica-l-use-and-conservation-in-eastern-uganda
#11
Esther Ebifa-Othieno, Antony Mugisha, Philip Nyeko, John David Kabasa
BACKGROUND: Tamarindus indica L is one of the indigenous fruit tree species that traditionally contributes to food security and ecosystem stability in sub-Saharan Africa. We hypothesized that the indigenous people of Eastern Uganda have used T. indica for generations and developed practices that promote its conservation and therefore we expected that they possess an elaborate indigenous knowledge (IK) system and that most of them have planted the species. The aim of this study was to assess the influence of IK, attitudes and practices on the use and conservation of T...
January 21, 2017: Journal of Ethnobiology and Ethnomedicine
https://www.readbyqxmd.com/read/28093097/present-day-central-african-forest-is-a-legacy-of-the-19th-century-human-history
#12
Julie Morin-Rivat, Adeline Fayolle, Charly Favier, Laurent Bremond, Sylvie Gourlet-Fleury, Nicolas Bayol, Philippe Lejeune, Hans Beeckman, Jean-Louis Doucet
The populations of light-demanding trees that dominate the canopy of central African forests are now aging. Here, we show that the lack of regeneration of these populations began ca. 165 ya (around 1850) after major anthropogenic disturbances ceased. Since 1885, less itinerancy and disturbance in the forest has occurred because the colonial administrations concentrated people and villages along the primary communication axes. Local populations formerly gardened the forest by creating scattered openings, which were sufficiently large for the establishment of light-demanding trees...
January 17, 2017: ELife
https://www.readbyqxmd.com/read/28052510/plant-diversity-enhances-moth-diversity-in-an-intensive-forest-management-experiment
#13
Heather T Root, Jake Verschuyl, Thomas Stokely, Paul Hammond, Melissa A Scherr, Matthew G Betts
Intensive forest management (IFM) promises to help satisfy increasing global demand for wood but may come at the cost of local reductions to forest biodiversity. IFM often reduces early seral plant diversity as a result of efforts to eliminate plant competition with crop trees. If diversity is a function of bottom-up drivers, theory predicts that specialists at lower trophic levels (e.g., insect herbivores) should be particularly sensitive to reductions in plant diversity. We conducted a stand-level experiment to test bottom-up controls on moth community structure, as mediated by degrees of forest management intensity...
January 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28028079/paradigms-in-eastern-spruce-budworm-lepidoptera-tortricidae-population-ecology-a-century-of-debate
#14
REVIEW
Deepa S Pureswaran, Rob Johns, Stephen B Heard, Dan Quiring
Three main hypotheses have been postulated over the past century to explain the outbreaking population dynamics of eastern spruce budworm, Choristoneura fumiferana (Clemens). The Silviculture Hypothesis first arose in the 1920s, with the idea that outbreaks were driven by forestry practices favoring susceptible softwood species. In the 1960s, it was proposed that populations were governed by Multiple Equilibria, with warm weather conditions releasing low-density populations from the regulatory control of natural enemies...
December 2016: Environmental Entomology
https://www.readbyqxmd.com/read/27956605/alternative-stable-states-and-the-sustainability-of-forests-grasslands-and-agriculture
#15
Kirsten A Henderson, Chris T Bauch, Madhur Anand
Endangered forest-grassland mosaics interspersed with expanding agriculture and silviculture occur across many parts of the world, including the southern Brazilian highlands. This natural mosaic ecosystem is thought to reflect alternative stable states driven by threshold responses of recruitment to fire and moisture regimes. The role of adaptive human behavior in such systems remains understudied, despite its pervasiveness and the fact that such ecosystems can exhibit complex dynamics. We develop a nonlinear mathematical model of coupled human-environment dynamics in mosaic systems and social processes regarding conservation and economic land valuation...
December 20, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27896307/data-on-birds-and-habitat-associated-with-forest-management-on-public-conservation-areas-in-the-mississippi-alluvial-valley
#16
Daniel J Twedt, R Randy Wilson
This data article contains data collected from 2006-2012 in forests located on 31 State or Federal conservation lands in or adjacent to the Mississippi Alluvial Valley. We present the location, treatment type, and silvicultural age of data collection locations. Presented data on bird detections and forest habitat were collected during avian point counts and associated forest habitat plots and linked to the publication (D.J. Twedt and R.R. Wilson, 2017) [5].
December 2016: Data in Brief
https://www.readbyqxmd.com/read/27764186/drivers-of-tree-growth-mortality-and-harvest-preferences-in-species-rich-plantations-for-smallholders-and-communities-in-the-tropics
#17
Huong Nguyen, Jerome Vanclay, John Herbohn, Jennifer Firn
There is growing interest in multi-species tropical plantations but little information exists to guide their design and silviculture. The Rainforestation Farming system is the oldest tropical polyculture planting system in the Philippines and provides a unique opportunity to understand the underlying processes affecting tree performance within diverse plantings. Data collected from 85 plots distributed across the 18 mixed-species plantations in the Philippines was used to identify the factors influencing growth, probability of harvest, and death of trees in these complex plantings...
2016: PloS One
https://www.readbyqxmd.com/read/27614911/determining-exhaust-fumes-exposure-in-chainsaw-operations
#18
F Neri, C Foderi, A Laschi, F Fabiano, M Cambi, G Sciarra, M C Aprea, A Cenni, E Marchi
The objective of this study was to investigate the inhalation exposure of forest operators to polycyclic aromatic hydrocarbons (PAHs) and BTEX (benzene, toluene, ethylbenzene and total xylenes) contained in the exhaust fumes released from chainsaws and to suggest possible countermeasures. The study was carried out in four silvicultural treatments (coppice clearcut, conifer thinning, conifer pruning, and sanitary cut), using three types of chainsaw fuel (normal two-stroke petrol mix and two alkylate fuels). Eighty personal air samples were collected; IOM samplers combined with Amberlite XAD-2 sorbent tubes were used for collecting PAHs and Radiello(®) samplers were used for BTEX...
November 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27587430/paradigms-in-eastern-spruce-budworm-lepidoptera-tortricidae-population-ecology-a-century-of-debate
#19
Deepa S Pureswaran, Rob Johns, Stephen B Heard, Dan Quiring
Three main hypotheses have been postulated over the past century to explain the outbreaking population dynamics of eastern spruce budworm, Choristoneura fumiferana (Clemens). The Silviculture Hypothesis first arose in the 1920s, with the idea that outbreaks were driven by forestry practices favoring susceptible softwood species. In the 1960s, it was proposed that populations were governed by Multiple Equilibria, with warm weather conditions releasing low-density populations from the regulatory control of natural enemies...
September 1, 2016: Environmental Entomology
https://www.readbyqxmd.com/read/27575596/limber-pine-pinus-flexilis-james-a-flexible-generalist-of-forest-communities-in-the-intermountain-west
#20
Marcella A Windmuller-Campione, James N Long
As forest communities continue to experience interactions between climate change and shifting disturbance regimes, there is an increased need to link ecological understanding to applied management. Limber pine (Pinus flexilis James.), an understudied species of western North America, has been documented to dominate harsh environments and thought to be competitively excluded from mesic environments. An observational study was conducted using the Forest Inventory and Analysis Database (FIAD) to test the competitive exclusion hypothesis across a broad elevational and geographic area within the Intermountain West, USA...
2016: PloS One
keyword
keyword
48857
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"