keyword
MENU ▼
Read by QxMD icon Read
search

Dynamics forest

keyword
https://www.readbyqxmd.com/read/28228915/rattan-calamoideae-diversity-and-biomass-change-in-different-habitat-types-during-two-years
#1
Nadine Ruppert, Asyraf Mansor, Shahrul Anuar Mohd Sah
Rattans (subfamily Calamoideae) are an important component of the forests of the Old World. However, few studies have been conducted on the distribution of these abundant palms within different habitats, specifically in Peninsular Malaysia. This study was aimed at assessing rattan diversity, abundance and biomass change across two different habitat types, namely, dipterocarp forests and fresh-water swamps within the Segari Melintang Forest Reserve, Perak, within two years. All rattan stems within five 100 m × 100 m sized study plots (A-E) of the two habitat types were counted in 2011 and 2013, and Shannon-Wiener diversity indices (H') and Bray-Curtis dissimilarity indices were calculated...
January 2017: Tropical Life Sciences Research
https://www.readbyqxmd.com/read/28225787/forest-dynamics-in-the-u-s-indicate-disproportionate-attrition-in-western-forests-rural-areas-and-public-lands
#2
Sheng Yang, Giorgos Mountrakis
Forests are experiencing significant changes; studying geographic patterns in forests is critical in understanding the impact of forest dynamics to biodiversity, soil erosion, water chemistry and climate. Few studies have examined forest geographic pattern changes other than fragmentation; however, other spatial processes of forest dynamics are of equal importance. Here, we study forest attrition, the complete removal of forest patches, that can result in complete habitat loss, severe decline of population sizes and species richness, and shifts of local and regional environmental conditions...
2017: PloS One
https://www.readbyqxmd.com/read/28225587/compms2miner-an-automatable-metabolite-identification-visualization-and-data-sharing-r-package-for-high-resolution-lc-ms-datasets
#3
William Matthew Bell Edmands, Lauren M Petrick, Dinesh Kumar Barupal, Augustin Scalbert, Mark Wilson, Jeffrey Wickliffe, Stephen M Rappaport
A long-standing challenge of untargeted metabolomic profiling by ultrahigh performance liquid chromatography-high resolution mass spectrometry (UHPLC-HRMS) is efficient transition from unknown mass spectral features to confident metabolite annotations. The compMS2Miner (Comprehensive MS2 Miner) package was developed in the R language to facilitate rapid, comprehensive feature annotation using a peak-picker-output and MS2 data files as inputs. The number of MS2 spectra that can be collected during a metabolomic profiling experiment far outweigh the amount of time required for pain-staking manual interpretation, therefore a degree of software workflow autonomy is required for broad-scale metabolite annotation...
February 22, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28223505/light-driven-growth-in-amazon-evergreen-forests-explained-by-seasonal-variations-of-vertical-canopy-structure
#4
Hao Tang, Ralph Dubayah
Light-regime variability is an important limiting factor constraining tree growth in tropical forests. However, there is considerable debate about whether radiation-induced green-up during the dry season is real, or an apparent artifact of the remote-sensing techniques used to infer seasonal changes in canopy leaf area. Direct and widespread observations of vertical canopy structures that drive radiation regimes have been largely absent. Here we analyze seasonal dynamic patterns between the canopy and understory layers in Amazon evergreen forests using observations of vertical canopy structure from a spaceborne lidar...
February 21, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28222248/long-term-effects-of-climate-change-on-carbon-storage-and-tree-species-composition-in-a-dry-deciduous-forest
#5
István Fekete, Kate Lajtha, Zsolt Kotroczó, Gábor Várbíró, Csaba Varga, János Attila Tóth, Ibolya Demeter, Gábor Veperdi, Imre Berki
Forest vegetation and soils have been suggested as potentially important sinks for carbon (C) with appropriate management, and thus are implicated as effective tools in stabilizing climate even with increasing anthropogenic release of CO2 . Drought, however, which is often predicted to increase in models of future climate change, may limit NPP of dry forests types, with unknown effects on soil C storage. We studied C dynamics of a deciduous temperate forest of Hungary that has been subject to significant decreases in precipitation and increases in temperature in recent decades...
February 21, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28220832/water-use-efficiency-of-an-old-growth-forest-in-lower-subtropical-china
#6
Xiaodong Liu, Xiuzhi Chen, Ronghua Li, Fengling Long, Lu Zhang, Qianmei Zhang, Jiyue Li
Carbon and water fluxes are key properties of ecosystem processes and functions. A better understanding of their temporal dynamics and coupling mechanism between these fluxes will help us improve ecosystem management for mitigation as well as adaption to future climatic change. From 2003 to 2009, carbon and water flux data were obtained by the eddy covariance method over an old-growth forest in the lower subtropical China. The 7 years of observational data indicated that the water-use efficiency (WUE) of the old-growth forest exhibited weak inter-annual variability...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28218791/development-and-validation-of-the-first-ssr-markers-for-mimosa-scabrella-benth
#7
F A Saiki, A P Bernardi, M S Reis, H Faoro, E M Souza, F O Pedrosa, A Mantovani, A F Guidolin
Mimosa scabrella Benth., popularly known as ''bracatinga'', is a pioneer and endemic species of Brazil, occurring in Mixed Ombrophilous Forest associated with Brazilian Atlantic Rainforest biomes. It is a fast-growing tree of the Fabaceae family that facilitates the dynamics of ecological succession. SSR development, when there is no genome sequence, is time and labor intensive and there are no molecular markers for M. scabrella. We developed and validated the first microsatellite markers for this tetraploid species, evaluating mother trees and progenies...
February 16, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28218442/template-free-growth-of-well-ordered-silver-nano-forest-ceramic-metamaterial-films-with-tunable-optical-responses
#8
Junhua Gao, Xingzhi Wu, Qiuwu Li, Shiyu Du, Feng Huang, Lingyan Liang, Hongliang Zhang, Fei Zhuge, Hongtao Cao, Yinglin Song
Currently, the limitations of conventional methods for fabricating metamaterials composed of well-aligned nanoscale inclusions either lack the necessary freedom to tune the structural geometry or are difficult for large-area synthesis. In this Communication, the authors propose a fabrication route to create well-ordered silver nano forest/ceramic composite single-layer or multi-layer vertically stacked structures, as a distinctive approach to make large-area nanoscale metamaterials. To take advantage of direct growth, the authors fabricate single-layer nanocomposite films with a well-defined sub-5 nm interwire gap and an average nanowire diameter of ≈3 nm...
February 20, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28216066/the-potential-effect-of-oral-microbiota-in-the-prediction-of-mucositis-during-radiotherapy-for-nasopharyngeal-carcinoma
#9
Xiao-Xia Zhu, Xiao-Jun Yang, Yi-Lan Chao, Hui-Min Zheng, Hua-Fang Sheng, Hai-Yue Liu, Yan He, Hong-Wei Zhou
BACKGROUND: Oral mucositis is probably the most debilitating complication that can arise in treating a patient with head and neck cancer. Little is known about the impacts of oral microbiota on the initiation and progression of mucositis. METHODS: Based on 16S rRNA gene sequencing, dynamic changes in oral bacterial profile as well as correlations between the severity of mucositis and bacterial shifts during radiotherapy were investigated. FINDINGS: Our results revealed that bacterial community structure altered progressively during radiation therapy, in parallel with a marked increase in the relative abundance of some Gram-negative bacteria...
February 7, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28210000/high-velocity-deformation-of-al0-3cocrfeni-high-entropy-alloy-remarkable-resistance-to-shear-failure
#10
Z Li, S Zhao, H Diao, P K Liaw, M A Meyers
The mechanical behavior of a single phase (fcc) Al0.3CoCrFeNi high-entropy alloy (HEA) was studied in the low and high strain-rate regimes. The combination of multiple strengthening mechanisms such as solid solution hardening, forest dislocation hardening, as well as mechanical twinning leads to a high work hardening rate, which is significantly larger than that for Al and is retained in the dynamic regime. The resistance to shear localization was studied by dynamically-loading hat-shaped specimens to induce forced shear localization...
February 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28207862/breeding-matters-natal-experience-influences-population-state-dependent-host-acceptance-by-an-eruptive-insect-herbivore
#11
Jordan Lewis Burke, Allan L Carroll
Eruptive forest insects are highly influential agents of change in forest ecosystems, and their effects have increased with recent climate change. State-dependent life histories contribute significantly to the population dynamics of eruptive forest insect herbivores; however, the proximate mechanisms by which these species shift between states is poorly understood. Laboratory bioassays were conducted using the mountain pine beetle (Dendroctonus ponderosae) to determine the effect of maternal host selection on offspring host preferences, as they apply to population state-dependent behaviors...
2017: PloS One
https://www.readbyqxmd.com/read/28194758/behavioral-responses-to-resource-heterogeneity-can-accelerate-biological-invasions
#12
Frithjof Lutscher, Jeffrey A Musgrave
The abundance and spatial distribution of resources in a landscape and the behavioral response of individuals determines whether and how fast an invasive species spreads in an environment. Whether and how landscape manipulations can be used to slow invasive species is of great interest, in particular in forest ecosystems, where tree removal, thinning, and increasing tree diversity are discussed as management options. Classically, the focus is on availability and accessibility of resources; more recent considerations include individual-level behavioral movement responses to a spatially heterogeneous resource distribution...
February 14, 2017: Ecology
https://www.readbyqxmd.com/read/28190693/long-term-monitoring-for-conservation-management-lessons-from-a-case-study-integrating-remote-sensing-and-field-approaches-in-floodplain-forests
#13
Patricia María Rodríguez-González, António Albuquerque, Miguel Martínez-Almarza, Ricardo Díaz-Delgado
Implementing long-term monitoring programs that effectively inform conservation plans is a top priority in environmental management. In floodplain forests, historical pressures interplay with the complex multiscale dynamics of fluvial systems and require integrative approaches to pinpoint drivers for their deterioration and ecosystem services loss. Combining a conceptual framework such as the Driver-Pressure-State-Impact-Response (DPSIR) with the development of valid biological indicators can contribute to the analysis of the driving forces and their effects on the ecosystem in order to formulate coordinated conservation measures...
February 9, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28182303/variable-effects-of-climate-on-forest-growth-in-relation-to-climate-extremes-disturbance-and-forest-dynamics
#14
Malcolm S Itter, Andrew O Finley, Anthony W D'Amato, Jane R Foster, John B Bradford
Changes in the frequency, duration, and severity of climate extremes are forecast to occur under global climate change. The impacts of climate extremes on forest productivity and health remain difficult to predict due to potential interactions with disturbance events and forest dynamics-changes in forest stand composition, density, size and age structure over time. Such interactions may lead to non-linear forest growth responses to climate involving thresholds and lag effects. Understanding how forest dynamics influence growth responses to climate is particularly important given stand structure and composition can be modified through management to increase forest resistance and resilience to climate change...
February 9, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28179914/cell-cycle-and-cell-size-dependent-gene-expression-reveals-distinct-subpopulations-at-single-cell-level
#15
Soheila Dolatabadi, Julián Candia, Nina Akrap, Christoffer Vannas, Tajana Tesan Tomic, Wolfgang Losert, Göran Landberg, Pierre Åman, Anders Ståhlberg
Cell proliferation includes a series of events that is tightly regulated by several checkpoints and layers of control mechanisms. Most studies have been performed on large cell populations, but detailed understanding of cell dynamics and heterogeneity requires single-cell analysis. Here, we used quantitative real-time PCR, profiling the expression of 93 genes in single-cells from three different cell lines. Individual unsynchronized cells from three different cell lines were collected in different cell cycle phases (G0/G1 - S - G2/M) with variable cell sizes...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/28179511/spatio-temporal-interactions-facilitate-large-carnivore-sympatry-across-a-resource-gradient
#16
K Ullas Karanth, Arjun Srivathsa, Divya Vasudev, Mahi Puri, Ravishankar Parameshwaran, N Samba Kumar
Species within a guild vary their use of time, space and resources, thereby enabling sympatry. As intra-guild competition intensifies, such behavioural adaptations may become prominent. We assessed mechanisms of facilitating sympatry among dhole (Cuon alpinus), leopard (Panthera pardus) and tiger (Panthera tigris) in tropical forests of India using camera-trap surveys. We examined population-level temporal, spatial and spatio-temporal segregation among them across four reserves representing a gradient of carnivore and prey densities...
February 8, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28176873/long-term-growth-of-temperate-broadleaved-forests-no-longer-benefits-soil-c-accumulation
#17
Yu-He Ji, Ke Guo, Shi-Bo Fang, Xiao-Niu Xu, Zhi-Gao Wang, Shu-Dong Wang
It is widely recognized that the long-term growth of forests benefits biomass carbon (C) sequestration, but it is not known whether the long-term growth of forests would also benefit soil C sequestration. We selected 79 representative soil profiles and investigated the influence of the forest stand age on the soil C dynamics of three soil layers (0-10, 10-20 and 20-30 cm) in temperate broadleaved forests in East China. The results suggest that the soil C density in temperature broadleaved forests significantly changes with the stand age, following a convex parabolic curve...
February 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28168035/evaluating-the-responses-of-forest-ecosystems-to-climate-change-and-co2-using-dynamic-global-vegetation-models
#18
Xiang Song, Xiaodong Zeng
The climate has important influences on the distribution and structure of forest ecosystems, which may lead to vital feedback to climate change. However, much of the existing work focuses on the changes in carbon fluxes or water cycles due to climate change and/or atmospheric CO 2, and few studies have considered how and to what extent climate change and CO 2 influence the ecosystem structure (e.g., fractional coverage change) and the changes in the responses of ecosystems with different characteristics. In this work, two dynamic global vegetation models (DGVMs): IAP-DGVM coupled with CLM3 and CLM4-CNDV, were used to investigate the response of the forest ecosystem structure to changes in climate (temperature and precipitation) and CO 2 concentration...
February 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28168017/out-of-africa-biogeography-and-diversification-of-the-pantropical-pond-skater-genus-limnogonus-st%C3%A3-l-1868-hemiptera-gerridae
#19
Zhen Ye, Yahui Zhen, Yanyan Zhou, Wenjun Bu
Gondwanan vicariance, long-distance dispersal (LDD), and boreotropical migration have been proposed as alternative hypotheses explaining the pantropical distribution pattern of organisms. In this study, the historical biogeography of the pond skater genus Limnogonus was reconstructed to evaluate the impact of biogeographical scenarios in shaping their modern transoceanic disjunction. We sampled almost 65% of recognized Limnogonus species. Four DNA fragments including 69 sequences were used to reconstruct a phylogram...
February 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28166498/real-time-interactive-tree-animation
#20
Ed Quigley, Yue Yu, Jingwei Huang, Winnie Lin, Ronald Fedkiw
We present a novel method for posing and animating botanical tree models interactively in real time. Unlike other state of the art methods which tend to produce trees that are overly flexible, bending and deforming as if they were underwater plants, our approach allows for arbitrarily high stiffness while still maintaining real-time frame rates without spurious artifacts, even on quite large trees with over ten thousand branches. This is accomplished by using an articulated rigid body model with as-stiff-as-desired rotational springs in conjunction with our newly proposed simulation technique, which is motivated both by position based dynamics and the typical O(N) algorithms for articulated rigid bodies...
January 30, 2017: IEEE Transactions on Visualization and Computer Graphics
keyword
keyword
92675
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"