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https://www.readbyqxmd.com/read/29333198/response-of-pacific-sector-antarctic-ice-shelves-to-the-el-ni%C3%A3-o-southern-oscillation
#1
F S Paolo, L Padman, H A Fricker, S Adusumilli, S Howard, M R Siegfried
Satellite observations over the past two decades have revealed increasing loss of grounded ice in West Antarctica, associated with floating ice shelves that have been thinning. Thinning reduces an ice-shelf's ability to restrain grounded-ice discharge, yet our understanding of the climate processes that drive mass changes is limited. Here, we use ice-shelf height data from four satellite altimeter missions (1994-2017) to show a direct link between ice-shelf-height variability in the Antarctic Pacific sector and changes in regional atmospheric circulation driven by the El Niño-Southern Oscillation...
January 2018: Nature Geoscience
https://www.readbyqxmd.com/read/29332297/integrodifference-equations-in-the-presence-of-climate-change-persistence-criterion-travelling-waves-and-inside-dynamics
#2
Mark A Lewis, Nathan G Marculis, Zhongwei Shen
To understand the effects that the climate change has on the evolution of species as well as the genetic consequences, we analyze an integrodifference equation (IDE) models for a reproducing and dispersing population in a spatio-temporal heterogeneous environment described by a shifting climate envelope. Our analysis on the IDE focuses on the persistence criterion, travelling wave solutions, and the inside dynamics. First, the persistence criterion, characterizing the global dynamics of the IDE, is established in terms of the basic reproduction number...
January 13, 2018: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/29331715/toxicokinetics-of-zn-and-cd-in-the-earthworm-eisenia-andrei-exposed-to-metal-contaminated-soils-under-different-combinations-of-air-temperature-and-soil-moisture-content
#3
M Nazaret González-Alcaraz, Susana Loureiro, Cornelis A M van Gestel
This study evaluated how different combinations of air temperature (20 °C and 25 °C) and soil moisture content (50% and 30% of the soil water holding capacity, WHC), reflecting realistic climate change scenarios, affect the bioaccumulation kinetics of Zn and Cd in the earthworm Eisenia andrei. Earthworms were exposed for 21 d to two metal-contaminated soils (uptake phase), followed by 21 d incubation in non-contaminated soil (elimination phase). Body Zn and Cd concentrations were checked in time and metal uptake (k1) and elimination (k2) rate constants determined; metal bioaccumulation factor (BAF) was calculated as k1/k2...
January 8, 2018: Chemosphere
https://www.readbyqxmd.com/read/29327437/intra-species-variation-in-a-widely-distributed-tree-species-regulates-the-responses-of-soil-microbiome-to-different-temperature-regimes
#4
Cui-Jing Zhang, Manuel Delgado-Baquerizo, John E Drake, Peter B Reich, Mark G Tjoelker, David T Tissue, Jun-Tao Wang, Ji-Zheng He, Brajesh K Singh
Plant characteristics in different provenances within a single species may vary in response to climate change, which might alter soil microbial communities and ecosystem functions. We conducted a glasshouse experiment and grew seedlings of three provenances (temperate, subtropical and tropical origins) of a tree species (i.e. Eucalyptus tereticornis) at different growth temperatures (18, 21.5, 25, 28.5, 32 and 35.5°C) for 54 days. At the end of the experiment, bacterial and fungal community composition, diversity and abundance were characterized...
January 12, 2018: Environmental Microbiology Reports
https://www.readbyqxmd.com/read/29327163/manipulating-the-phytic-acid-content-of-rice-grain-toward-improving-micronutrient-bioavailability
#5
REVIEW
Ishara Perera, Saman Seneweera, Naoki Hirotsu
Myo-inositol hexaphosphate, also known as phytic acid (PA), is the most abundant storage form of phosphorus in seeds. PA acts as a strong chelator of metal cations to form phytate and is considered an anti-nutrient as it reduces the bioavailability of important micronutrients. Although the major nutrient source for more than one-half of the global population, rice is a poor source of essential micronutrients. Therefore, biofortification and reducing the PA content of rice have arisen as new strategies for increasing micronutrient bioavailability in rice...
January 11, 2018: Rice
https://www.readbyqxmd.com/read/29325406/polycentrism-in-global-health-governance-scholarship-comment-on-four-challenges-that-global-health-networks-face
#6
Jale Tosun
Drawing on an in-depth analysis of eight global health networks, a recent essay in this journal argued that global health networks face four challenges to their effectiveness: problem definition, positioning, coalition-building, and governance. While sharing the argument of the essay concerned, in this commentary, we argue that these analytical concepts can be used to explicate a concept that has implicitly been used in global health governance scholarship for quite a few years. While already prominent in the discussion of climate change governance, for instance, global health governance scholarship could make progress by looking at global health governance as being polycentric...
May 23, 2017: International Journal of Health Policy and Management
https://www.readbyqxmd.com/read/29324394/effects-of-ocean-acidification-on-copepods
#7
REVIEW
Minghua Wang, Chang-Bum Jeong, Young Hwan Lee, Jae-Seong Lee
Ocean acidification (OA) leads to significant changes in seawater carbon chemistry, broadly affects marine organisms, and considered as a global threat to the fitness of marine ecosystems. Due to the crucial role of copepods in marine food webs of transferring energy from primary producers to higher trophic levels, numerous studies have been conducted to examine the impacts of OA on biological traits of copepods such as growth and reproduction. Under OA stress, the copepods demonstrated species-specific and stage-dependent responses...
January 5, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29324036/entomological-opportunities-and-challenges-for-sustainable-viticulture-in-a-global-market
#8
Kent M Daane, Charles Vincent, Rufus Isaacs, Claudio Ioriatti
Viticulture has experienced dramatic global growth in acreage and value. As the international exchange of goods has increased, so too has the market demand for sustainably produced products. Both elements redefine the entomological challenges posed to viticulture and have stimulated significant advances in arthropod pest control programs. Vineyard managers on all continents are increasingly combating invasive species, resulting in the adoption of novel insecticides, semiochemicals, and molecular tools to support sustainable viticulture...
January 7, 2018: Annual Review of Entomology
https://www.readbyqxmd.com/read/29322639/prokaryotes-in-the-wais-divide-ice-core-reflect-source-and-transport-changes-between-last-glacial-maximum-and-the-early-holocene
#9
Pamela A Santibáñez, Olivia J Maselli, Mark C Greenwood, Mackenzie M Grieman, Eric S Saltzman, Joseph R McConnell, John C Priscu
We present the first long-term, highly resolved prokaryotic cell concentration record obtained from a polar ice core. This record, obtained from the West Antarctic Ice Sheet (WAIS) Divide (WD) ice core, spanned from the Last Glacial Maximum (LGM) to the early Holocene (EH) and showed distinct fluctuations in prokaryotic cell concentration coincident with major climatic states. The time series also revealed a ~1,500-year periodicity with greater amplitude during the Last Deglaciation (LDG). Higher prokaryotic cell concentration and lower variability occurred during the LGM and EH than during the LDG...
January 11, 2018: Global Change Biology
https://www.readbyqxmd.com/read/29322582/large-scale-disturbance-legacies-and-the-climate-sensitivity-of-primary-picea-abies-forests
#10
Jonathan S Schurman, Volodymyr Trotsiuk, Radek Bače, Vojtěch Čada, Shawn Fraver, Pavel Janda, Dominik Kulakowski, Jana Labusova, Martin Mikoláš, Thomas A Nagel, Rupert Seidl, Michal Synek, Kristýna Svobodová, Oleh Chaskovskyy, Marius Teodosiu, Miroslav Svoboda
Determining the drivers of shifting forest disturbance rates remains a pressing global change issue. Large-scale forest dynamics are commonly assumed to be climate driven, but appropriately scaled disturbance histories are rarely available to assess how disturbance legacies alter subsequent disturbance rates and the climate sensitivity of disturbance. We compiled multiple tree-ring based disturbance histories from primary Picea abies forest fragments distributed throughout five European landscapes spanning the Bohemian Forest and the Carpathian Mountains...
January 11, 2018: Global Change Biology
https://www.readbyqxmd.com/read/29321885/climate-change-affecting-oil-palm-agronomy-and-oil-palm-cultivation-increasing-climate-change-require-amelioration
#11
REVIEW
R Russell M Paterson, Nelson Lima
Palm oil is used in various valued commodities and is a large global industry worth over US$ 50 billion annually. Oil palms (OP) are grown commercially in Indonesia and Malaysia and other countries within Latin America and Africa. The large-scale land-use change has high ecological, economic, and social impacts. Tropical countries in particular are affected negatively by climate change (CC) which also has a detrimental impact on OP agronomy, whereas the cultivation of OP increases CC. Amelioration of both is required...
January 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29321865/responses-of-soil-respiration-to-soil-management-changes-in-an-agropastoral-ecotone-in-inner-mongolia-china
#12
Haili Xue, Haiping Tang
Studying the responses of soil respiration (Rs) to soil management changes is critical for enhancing our understanding of the global carbon cycle and has practical implications for grassland management. Therefore, the objectives of this study were (1) quantify daily and seasonal patterns of Rs, (2) evaluate the influence of abiotic factors on Rs, and (3) detect the effects of soil management changes on Rs. We hypothesized that (1) most of daily and seasonal variation in Rs could be explained by soil temperature (Ts) and soil water content (Sw), (2) soil management changes could significantly affect Rs, and (3) soil management changes affected Rs via the significant change in abiotic and biotic factors...
January 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29321810/metabolic-engineering-of-pichia-pastoris-for-production-of-isobutanol-and-isobutyl-acetate
#13
Wiparat Siripong, Philipp Wolf, Theodora Puspowangi Kusumoputri, Joe James Downes, Kanokarn Kocharin, Sutipa Tanapongpipat, Weerawat Runguphan
Background: Interests in renewable fuels have exploded in recent years as the serious effects of global climate change become apparent. Microbial production of high-energy fuels by economically efficient bioprocesses has emerged as an attractive alternative to the traditional production of transportation fuels. Here, we engineered Pichia pastoris, an industrial workhorse in heterologous enzyme production, to produce the biofuel isobutanol from two renewable carbon sources, glucose and glycerol...
2018: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/29321300/tetrapod-distribution-and-temperature-rise-during-the-permian-triassic-mass-extinction
#14
Massimo Bernardi, Fabio Massimo Petti, Michael J Benton
The Permian-Triassic mass extinction (PTME) had an enormous impact on life in three ways: by substantially reducing diversity, by reshuffling the composition of ecosystems and by expelling life from the tropics following episodes of intense global warming. But was there really an 'equatorial tetrapod gap', and how long did it last? Here, we consider both skeletal and footprint data, and find a more complex pattern: (i) tetrapods were distributed both at high and low latitudes during this time; (ii) there was a clear geographic disjunction through the PTME, with tetrapod distribution shifting 10-15° poleward; and (iii) there was a rapid expansion phase across the whole of Pangea following the PTME...
January 10, 2018: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29321298/the-worldwide-importance-of-honey-bees-as-pollinators-in-natural-habitats
#15
Keng-Lou James Hung, Jennifer M Kingston, Matthias Albrecht, David A Holway, Joshua R Kohn
The western honey bee (Apis mellifera) is the most frequent floral visitor of crops worldwide, but quantitative knowledge of its role as a pollinator outside of managed habitats is largely lacking. Here we use a global dataset of 80 published plant-pollinator interaction networks as well as pollinator effectiveness measures from 34 plant species to assess the importance of A. mellifera in natural habitats. Apis mellifera is the most frequent floral visitor in natural habitats worldwide, averaging 13% of floral visits across all networks (range 0-85%), with 5% of plant species recorded as being exclusively visited by A...
January 10, 2018: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29320501/uncertainty-of-future-projections-of-species-distributions-in-mountainous-regions
#16
Ying Tang, Julie A Winkler, Andrés Viña, Jianguo Liu, Yuanbin Zhang, Xiaofeng Zhang, Xiaohong Li, Fang Wang, Jindong Zhang, Zhiqiang Zhao
Multiple factors introduce uncertainty into projections of species distributions under climate change. The uncertainty introduced by the choice of baseline climate information used to calibrate a species distribution model and to downscale global climate model (GCM) simulations to a finer spatial resolution is a particular concern for mountainous regions, as the spatial resolution of climate observing networks is often insufficient to detect the steep climatic gradients in these areas. Using the maximum entropy (MaxEnt) modeling framework together with occurrence data on 21 understory bamboo species distributed across the mountainous geographic range of the Giant Panda, we examined the differences in projected species distributions obtained from two contrasting sources of baseline climate information, one derived from spatial interpolation of coarse-scale station observations and the other derived from fine-spatial resolution satellite measurements...
2018: PloS One
https://www.readbyqxmd.com/read/29320458/community-characteristics-and-leaf-stoichiometric-traits-of-desert-ecosystems-regulated-by-precipitation-and-soil-in-an-arid-area-of-china
#17
Xiaolong Zhang, Tianyu Guan, Jihua Zhou, Wentao Cai, Nannan Gao, Hui Du, Lianhe Jiang, Liming Lai, Yuanrun Zheng
Precipitation is a key environmental factor determining plant community structure and function. Knowledge of how community characteristics and leaf stoichiometric traits respond to variation in precipitation is crucial for assessing the effects of global changes on terrestrial ecosystems. In this study, we measured community characteristics, leaf stoichiometric traits, and soil properties along a precipitation gradient (35-209 mm) in a desert ecosystem of Northwest China to explore the drivers of these factors...
January 10, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29317285/wide-spread-whole-genome-duplications-contribute-to-genome-complexity-and-species-diversity-in-angiosperms
#18
Ren Ren, Haifeng Wang, Chunce Guo, Ning Zhang, Liping Zeng, Yamao Chen, Hong Ma, Ji Qi
Gene duplications (GDs) provide evolutionary potentials for generating novel functions, while polyploidization or whole genome duplication (WGD) doubles the chromosomes initially and results in hundreds to thousands of retained duplicates. WGDs are strongly supported by evidence commonly found in many species-rich lineages of eukaryotes, thus are considered as a major driving force in species diversification. We performed comparative genomic and phylogenomic analyses on 59 public genomes/transcriptomes and 46 newly sequenced transcriptomes covering major lineages of angiosperms, to detect large-scale gene duplication events by survey of tens of thousands of gene family trees...
January 6, 2018: Molecular Plant
https://www.readbyqxmd.com/read/29316685/climate-change-risk-perception-in-taiwan-correlation-with-individual-and-societal-factors
#19
Yingying Sun, Ziqiang Han
This study differentiates the risk perception and influencing factors of climate change along the dimensions of global severity and personal threat. Using the 2013 Taiwan Social Change Survey (TSGS) data (N = 2001) as a representative sample of adults from Taiwan, we investigated the influencing factors of the risk perceptions of climate change in these two dimensions (global severity and personal threat). Logistic regression models were used to examine the correlations of individual factors (gender, age, education, climate-related disaster experience and risk awareness, marital status, employment status, household income, and perceived social status) and societal factors (religion, organizational embeddedness, and political affiliations) with the above two dimensions...
January 8, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29316649/%C3%A2-cat-3-mots-nanosatellite-mission-for-optical-multispectral-and-gnss-r-earth-observation-concept-and-analysis
#20
Jordi Castellví, Adriano Camps, Jordi Corbera, Ramon Alamús
The ³Cat-3/MOTS (3: Cube, Cat: Catalunya, 3: 3rd CubeSat mission/Missió Observació Terra Satèl·lit) mission is a joint initiative between the Institut Cartogràfic i Geològic de Catalunya (ICGC) and the Universitat Politècnica de Catalunya-BarcelonaTech (UPC) to foster innovative Earth Observation (EO) techniques based on data fusion of Global Navigation Satellite Systems Reflectometry (GNSS-R) and optical payloads. It is based on a 6U CubeSat platform, roughly a 10 cm × 20 cm × 30 cm parallelepiped...
January 6, 2018: Sensors
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