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Global Warming Organisms

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https://www.readbyqxmd.com/read/28720866/surges-in-trematode-prevalence-linked-to-centennial-scale-flooding-events-in-the-adriatic
#1
Daniele Scarponi, Michele Azzarone, Michał Kowalewski, John Warren Huntley
The forecasts of increasing global temperature and sea level rise have led to concern about the response of parasites to anthropogenic climate change. Whereas ecological studies of parasite response to environmental shifts are necessarily limited to short time scales, the fossil record can potentially provide a quantitative archive of long-term ecological responses to past climate transitions. Here, we document multi-centennial scale changes in prevalence of trematodes infesting the bivalve host Abra segmentum through multiple sea-level fluctuations preserved in brackish Holocene deposits of the Po Plain, Italy...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28708078/spatial-variation-of-soil-organic-carbon-and-total-nitrogen-in-the-coastal-area-of-mid-eastern-china
#2
Yan Xu, Lijie Pu, Qilin Liao, Ming Zhu, Xue Yu, Tianying Mao, Chenxing Xu
Soils play an important role in sequestrating atmospheric CO₂. Coastal tidal flats have been intensively reclaimed for food security and living spaces worldwide. We aimed to identify the changes of soil organic carbon (SOC) and total nitrogen (TN) following coastal reclamation and their spatial variation in the coastal area of mid-Eastern China to provide information for coastal cropland management. We measured SOC and TN of 463 soil samples in the coastal plain of mid-Eastern China. The results showed that SOC and TN increased highly from the uncultivated coastal tidal flat (2...
July 14, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28701687/the-temperature-sensitivity-of-soil-organic-carbon-decomposition-is-greater-in-subsoil-than-in-topsoil-during-laboratory-incubation
#3
Dong Yan, Jinquan Li, Junmin Pei, Jun Cui, Ming Nie, Changming Fang
The turnover of soil organic carbon (SOC) in cropland plays an important role in terrestrial carbon cycling, but little is known about the temperature sensitivity (Q 10) of SOC decomposition below the topsoil layer of arable soil. Here, samples of topsoil (0-20 cm) and subsoil (20-40 cm) layers were obtained from paddy fields and upland croplands in two regions of China. Using a sequential temperature changing method, soil respiration rates were calculated at different temperatures (8 °C to 28 °C) and fitted to an exponential equation to estimate Q 10 values...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28694846/synthetic-co2-fixation-enzyme-cascades-immobilized-on-self-assembled-nanostructures-that-enhance-co2-o2-selectivity-of-rubisco
#4
Sriram Satagopan, Yuan Sun, Jon R Parquette, F Robert Tabita
BACKGROUND: With increasing concerns over global warming and depletion of fossil-fuel reserves, it is attractive to develop innovative strategies to assimilate CO2, a greenhouse gas, into usable organic carbon. Cell-free systems can be designed to operate as catalytic platforms with enzymes that offer exceptional selectivity and efficiency, without the need to support ancillary reactions of metabolic pathways operating in intact cells. Such systems are yet to be exploited for applications involving CO2 utilization and subsequent conversion to valuable products, including biofuels...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28691098/high-particulate-iron-ii-content-in-glacially-sourced-dusts-enhances-productivity-of-a-model-diatom
#5
Elizabeth M Shoenfelt, Jing Sun, Gisela Winckler, Michael R Kaplan, Alejandra L Borunda, Kayla R Farrell, Patricio I Moreno, Diego M Gaiero, Cristina Recasens, Raymond N Sambrotto, Benjamin C Bostick
Little is known about the bioavailability of iron (Fe) in natural dusts and the impact of dust mineralogy on Fe utilization by photosynthetic organisms. Variation in the supply of bioavailable Fe to the ocean has the potential to influence the global carbon cycle by modulating primary production in the Southern Ocean. Much of the dust deposited across the Southern Ocean is sourced from South America, particularly Patagonia, where the waxing and waning of past and present glaciers generate fresh glaciogenic material that contrasts with aged and chemically weathered nonglaciogenic sediments...
June 2017: Science Advances
https://www.readbyqxmd.com/read/28683118/reef-calcifiers-are-adapted-to-episodic-heat-stress-but-vulnerable-to-sustained-warming
#6
Marleen Stuhr, Claire E Reymond, Vera Rieder, Pamela Hallock, Jörg Rahnenführer, Hildegard Westphal, Michal Kucera
Shallow marine ecosystems naturally experience fluctuating physicochemical conditions across spatial and temporal scales. Widespread coral-bleaching events, induced by prolonged heat stress, highlight the importance of how the duration and frequency of thermal stress influence the adaptive physiology of photosymbiotic calcifiers. Large benthic foraminifera harboring algal endosymbionts are major tropical carbonate producers and bioindicators of ecosystem health. Like corals, they are sensitive to thermal stress and bleach at temperatures temporarily occurring in their natural habitat and projected to happen more frequently...
2017: PloS One
https://www.readbyqxmd.com/read/28675635/deep-peat-warming-increases-surface-methane-and-carbon-dioxide-emissions-in-a-black-spruce-dominated-ombrotrophic-bog
#7
Allison L Gill, Marc-André Giasson, Rieka Yu, Adrien C Finzi
Boreal peatlands contain approximately 500 Pg carbon (C) in the soil, emit globally significant quantities of methane (CH4 ), and are highly sensitive to climate change. Warming associated with global climate change is likely to increase the rate of the temperature-sensitive processes that decompose stored organic carbon and release carbon dioxide (CO2 ) and CH4 . Variation in the temperature sensitivity of CO2 and CH4 production and increased peat aerobicity due to enhanced growing-season evapotranspiration may alter the nature of peatland trace gas emission...
July 4, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28649233/microbial-community-response-to-terrestrially-derived-dissolved-organic-matter-in-the-coastal-arctic
#8
Rachel E Sipler, Colleen T E Kellogg, Tara L Connelly, Quinn N Roberts, Patricia L Yager, Deborah A Bronk
Warming at nearly twice the global rate, higher than average air temperatures are the new 'normal' for Arctic ecosystems. This rise in temperature has triggered hydrological and geochemical changes that increasingly release carbon-rich water into the coastal ocean via increased riverine discharge, coastal erosion, and the thawing of the semi-permanent permafrost ubiquitous in the region. To determine the biogeochemical impacts of terrestrially derived dissolved organic matter (tDOM) on marine ecosystems we compared the nutrient stocks and bacterial communities present under ice-covered and ice-free conditions, assessed the lability of Arctic tDOM to coastal microbial communities from the Chukchi Sea, and identified bacterial taxa that respond to rapid increases in tDOM...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28639291/perfusion-of-isolated-rat-kidney-with-mesenchymal-stromal-cells-extracellular-vesicles-prevents-ischaemic-injury
#9
Marilena Gregorini, Valeria Corradetti, Eleonora Francesca Pattonieri, Chiara Rocca, Samantha Milanesi, Andrea Peloso, Silvana Canevari, Loris De Cecco, Matteo Dugo, Maria Antonietta Avanzini, Melissa Mantelli, Marcello Maestri, Pasquale Esposito, Stefania Bruno, Carmelo Libetta, Antonio Dal Canton, Teresa Rampino
Kidney donation after circulatory death (DCD) is a less than ideal option to meet organ shortages. Hypothermic machine perfusion (HMP) with Belzer solution (BS) improves the viability of DCD kidneys, although the graft clinical course remains critical. Mesenchymal stromal cells (MSC) promote tissue repair by releasing extracellular vesicles (EV). We evaluated whether delivering MSC-/MSC-derived EV during HMP protects rat DCD kidneys from ischaemic injury and investigated the underlying pathogenic mechanisms...
June 21, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28630921/increasing-probability-of-mortality-during-indian-heat-waves
#10
Omid Mazdiyasni, Amir AghaKouchak, Steven J Davis, Shahrbanou Madadgar, Ali Mehran, Elisa Ragno, Mojtaba Sadegh, Ashmita Sengupta, Subimal Ghosh, C T Dhanya, Mohsen Niknejad
Rising global temperatures are causing increases in the frequency and severity of extreme climatic events, such as floods, droughts, and heat waves. We analyze changes in summer temperatures, the frequency, severity, and duration of heat waves, and heat-related mortality in India between 1960 and 2009 using data from the India Meteorological Department. Mean temperatures across India have risen by more than 0.5°C over this period, with statistically significant increases in heat waves. Using a novel probabilistic model, we further show that the increase in summer mean temperatures in India over this period corresponds to a 146% increase in the probability of heat-related mortality events of more than 100 people...
June 2017: Science Advances
https://www.readbyqxmd.com/read/28616177/the-effects-of-elevated-temperature-and-dissolved-%C3%AF-co2-on-a-marine-foundation-species
#11
Cori J Speights, Brian R Silliman, Michael W McCoy
Understanding how climate change and other environmental stressors will affect species is a fundamental concern of modern ecology. Indeed, numerous studies have documented how climate stressors affect species distributions and population persistence. However, relatively few studies have investigated how multiple climate stressors might affect species. In this study, we investigate the impacts of how two climate change factors affect an important foundation species. Specifically, we tested how ocean acidification from dissolution of CO 2 and increased sea surface temperatures affect multiple characteristics of juvenile eastern oysters (Crassostrea virginica)...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28593723/imbalanced-nutrient-recycling-in-a-warmer-ocean-driven-by-differential-response-of-extracellular-enzymatic-activities
#12
Begoña Ayo, Naiara Abad, Itxaso Artolozaga, Iñigo Azua, Zuriñe Baña, Marian Unanue, Josep M Gasol, Carlos M Duarte, Juan Iriberri
Ocean oligotrophication concurrent with warming weakens the capacity of marine primary producers to support marine food webs and act as a CO2 sink, and is believed to result from reduced nutrient inputs associated to the stabilization of the thermocline. However, nutrient supply in the oligotrophic ocean is largely dependent on the recycling of organic matter. This involves hydrolytic processes catalyzed by extracellular enzymes released by bacteria, which temperature-dependence has not yet been evaluated. Here we report a global assessment of the temperature-sensitivity, as represented by the activation energies (Ea ), of extracellular β-glucosidase (βG), leucine aminopeptidase (LAP) and alkaline phosphatase (AP) enzymatic activities, which enable the uptake by bacteria of substrates rich in carbon, nitrogen and phosphorus, respectively...
June 7, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28585973/impact-on-short-lived-climate-forcers-slcfs-from-a-realistic-land-use-change-scenario-via-changes-in-biogenic-emissions
#13
C E Scott, S A Monks, D V Spracklen, S R Arnold, P M Forster, A Rap, K S Carslaw, M P Chipperfield, C L S Reddington, C Wilson
More than one quarter of natural forests have been cleared by humans to make way for other land-uses, with changes to forest cover projected to continue. The climate impact of land-use change (LUC) is dependent upon the relative strength of several biogeophysical and biogeochemical effects. In addition to affecting the surface albedo and exchanging carbon dioxide (CO2) and moisture with the atmosphere, vegetation emits biogenic volatile organic compounds (BVOCs), altering the formation of short-lived climate forcers (SLCFs) including aerosol, ozone (O3) and methane (CH4)...
June 6, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28584703/patterns-of-bleaching-and-mortality-following-widespread-warming-events-in-2014-and-2015-at-the-hanauma-bay-nature-preserve-hawai-i
#14
Ku'ulei S Rodgers, Keisha D Bahr, Paul L Jokiel, Angela Richards Donà
Drastic increases in global carbon emissions in the past century have led to elevated sea surface temperatures that negatively affect coral reef organisms. Worldwide coral bleaching-related mortality is increasing and data has shown even isolated and protected reefs are vulnerable to the effects of global climate change. In 2014 and 2015, coral reefs in the main Hawaiian Islands (MHI) suffered up to 90% bleaching, with higher than 50% subsequent mortality in some areas. The location and severity of bleaching and mortality was strongly influenced by the spatial and temporal patterns of elevated seawater temperatures...
2017: PeerJ
https://www.readbyqxmd.com/read/28580418/human-induced-changes-in-the-distribution-of-rainfall
#15
Aaron E Putnam, Wallace S Broecker
A likely consequence of global warming will be the redistribution of Earth's rain belts, affecting water availability for many of Earth's inhabitants. We consider three ways in which planetary warming might influence the global distribution of precipitation. The first possibility is that rainfall in the tropics will increase and that the subtropics and mid-latitudes will become more arid. A second possibility is that Earth's thermal equator, around which the planet's rain belts and dry zones are organized, will migrate northward...
May 2017: Science Advances
https://www.readbyqxmd.com/read/28578856/environmental-performances-of-different-configurations-of-a-material-recovery-facility-in-a-life-cycle-perspective
#16
Filomena Ardolino, Chiara Berto, Umberto Arena
The study evaluated the environmental performances of an integrated material recovery facility (MRF) able to treat 32kt/y of unsorted mixed waste, made of residuals from household source separation and separate collection. The facility includes a mechanical sorting platform for the production of a solid recovered fuel (SRF) utilized in an external waste-to-energy plant, bio-cells for tunnel composting of organic fraction, and a sanitary landfill for the safe disposal of ultimate waste. All the MRF sub-units have been analysed in depth in order to acquire reliable data for a life cycle assessment study, focused on the environmental performances of different configurations of the facility...
June 1, 2017: Waste Management
https://www.readbyqxmd.com/read/28573558/short-term-biochar-application-induced-variations-in-c-and-n-mineralization-in-a-compost-amended-tropical-soil
#17
Shih-Hao Jien, Wen-Chi Chen, Yong Sik Ok, Yasser Mahmoud Awad, Chien-Sen Liao
To mitigate food shortage due to global warming, developing sustainable management practices to stabilize soil organic matter (SOM) and sequester more carbon (C) in the cultivated soils is necessary, particularly in subtropical and tropical areas. A short-term (56 days) incubation experiment was conducted to evaluate the influences of rice husk biochar (RHB) and manure compost (MC) application on C mineralization and nitrogen (N) immobilization in a sandy loam soil. The RHB was separately incorporated into the soil at application rates of 2 and 4% (w/w) either with or without 1% (w/w) compost...
June 1, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28573380/the-contrasting-effects-of-short-term-climate-change-on-the-early-recruitment-of-tree-species
#18
Inés Ibáñez, Daniel S W Katz, Benjamin R Lee
Predictions of plant responses to climate change are frequently based on organisms' presence in warmer locations, which are then assumed to reflect future performance in cooler areas. However, as plant life stages may be affected differently by environmental changes, there is little empirical evidence that this approach provides reliable estimates of short-term responses to global warming. Under this premise, we analyzed 8 years of early recruitment data, seed production and seedling establishment and survival, collected for two tree species at two latitudes...
July 2017: Oecologia
https://www.readbyqxmd.com/read/28566703/astronomical-age-constraints-and-extinction-mechanisms-of-the-late-triassic-carnian-crisis
#19
Charlotte S Miller, Francien Peterse, Anne-Christine da Silva, Viktória Baranyi, Gert J Reichart, Wolfram M Kürschner
The geological record contains evidence for numerous pronounced perturbations in the global carbon cycle, some of which are associated with mass extinction. In the Carnian (Late Triassic), evidence from sedimentology and fossil pollen points to a significant change in climate, resulting in biotic turnover, during a time termed the 'Carnian Pluvial Episode' (CPE). Evidence from the marine realm suggests a causal relationship between the CPE, a global 'wet' period, and the injection of light carbon into the atmosphere...
May 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28555071/seasonally-lagged-effects-of-climatic-factors-on-malaria-incidence-in-south-africa
#20
Takayoshi Ikeda, Swadhin K Behera, Yushi Morioka, Noboru Minakawa, Masahiro Hashizume, Ataru Tsuzuki, Rajendra Maharaj, Philip Kruger
Globally, malaria cases have drastically dropped in recent years. However, a high incidence of malaria remains in some sub-Saharan African countries. South Africa is mostly malaria-free, but northeastern provinces continue to experience seasonal outbreaks. Here we investigate the association between malaria incidence and spatio-temporal climate variations in Limpopo. First, dominant spatial patterns in malaria incidence anomalies were identified using self-organizing maps. Composite analysis found significant associations among incidence anomalies and climate patterns...
May 29, 2017: Scientific Reports
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