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Global Change Biology

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https://www.readbyqxmd.com/read/28731569/diversity-in-thermal-affinity-among-key-piscivores-buffers-impacts-of-ocean-warming-on-predator-prey-interactions
#1
Rebecca L Selden, Ryan D Batt, Vincent S Saba, Malin L Pinsky
Asymmetries in responses to climate change have the potential to alter important predator-prey interactions, in part by altering the location and size of spatial refugia for prey. We evaluated the effect of ocean warming on interactions between four important piscivores and four of their prey in the U.S. Northeast Shelf by examining species overlap under historical conditions (1968-2014) and with a doubling in CO2 . Because both predator and prey shift their distributions in response to changing ocean conditions, the net impact of warming or cooling on predator-prey interactions was not determined a priori from the range extent of either predator or prey alone...
July 21, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28731522/wildlife-species-benefitting-from-a-greener-arctic-are-most-sensitive-to-shrub-cover-at-leading-range-edges
#2
Helen C Wheeler, Toke T Høye, Jens-Christian Svenning
Widespread expansion of shrubs is occurring across the Arctic. Shrub expansion will substantially alter arctic wildlife habitats. Identifying which wildlife species are most affected by shrubification is central to predicting future arctic community composition. Through meta-analysis, we synthesized the published evidence for effects of canopy-forming shrubs on birds and mammals in the Arctic and Subarctic. We examined variation in species behaviour, distribution and population dynamics in birds and mammals in response to shrub cover (including shrub cover indicators such as shrub occurrence, extent, density and height)...
July 21, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28731514/with-or-without-you-effects-of-the-concurrent-range-expansion-of-an-herbivore-and-its-natural-enemy-on-native-species-interactions
#3
David Carrasco, Gaylord A Desurmont, Diane Laplanche, Magali Proffit, Rieta Gols, Paul G Becher, Mattias C Larsson, Ted C J Turlings, Peter Anderson
Global climatic changes may lead to the arrival of multiple range-expanding species from different trophic levels into new habitats, either simultaneously or in quick succession, potentially causing the introduction of manifold novel interactions into native food webs. Unraveling the complex biotic interactions between native and range-expanding species is critical to understand the impact of climate change on community ecology, but experimental evidence is lacking. In a series of laboratory experiments that simulated direct and indirect species interactions, we investigated the effects of the concurrent arrival of a range-expanding insect herbivore in Europe, Spodoptera littoralis, and its associated parasitoid Microplitis rufiventris, on the native herbivore Mamestra brassicae, and its associated parasitoid M...
July 21, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28727281/defaunation-leads-to-interaction-deficits-not-interaction-compensation-in-an-island-seed-dispersal-network
#4
Evan C Fricke, Joshua J Tewksbury, Haldre S Rogers
Following defaunation, the loss of interactions with mutualists such as pollinators or seed dispersers may be compensated through increased interactions with remaining mutualists, ameliorating the negative cascading impacts on biodiversity. Alternatively, remaining mutualists may respond to altered competition by reducing the breadth or intensity of their interactions, exacerbating negative impacts on biodiversity. Despite the importance of these responses for our understanding of the dynamics of mutualistic networks and their response to global change, the mechanism and magnitude of interaction compensation within real mutualistic networks remains largely unknown...
July 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28727232/functional-genomic-analysis-of-corals-from-natural-co2-seeps-reveals-core-molecular-responses-involved-in-acclimatization-to-ocean-acidification
#5
C D Kenkel, A Moya, J Strahl, C Humphrey, L K Bay
Little is known about the potential for acclimatization or adaptation of corals to ocean acidification and even less about the molecular mechanisms underpinning these processes. Here we examine global gene expression patterns in corals and their intracellular algal symbionts from two replicate population pairs in Papua New Guinea that have undergone long-term acclimatization to natural variation in pCO2 . In the coral host, only 61 genes were differentially expressed in response to pCO2 environment, but the pattern of change was highly consistent between replicate populations, likely reflecting the core expression homeostasis response to ocean acidification...
July 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28727222/spatiotemporal-pattern-of-gross-primary-productivity-and-its-covariation-with-climate-in-china-over-the-last-thirty-years
#6
Yitong Yao, Xuhui Wang, Yue Li, Tao Wang, Miaogen Shen, Mingyuan Du, Honglin He, Yingnian Li, Weijun Luo, Mingguo Ma, Yaoming Ma, Yanhong Tang, Huimin Wang, Xianzhou Zhang, Yiping Zhang, Liang Zhao, Guangsheng Zhou, Shilong Piao
The uncertainties of China's GPP estimates by global data-oriented products and ecosystem models justify a development of high-resolution data-oriented GPP dataset over China. We applied a machine learning algorithm developing a new GPP dataset for China with 0.1° spatial resolution and monthly temporal frequency based on eddy flux measurements from 40 sites in China and surrounding countries, most of which have not been explored in previous global GPP datasets. According to our estimates, mean annual GPP over China is 6...
July 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28727218/altered-sediment-biota-and-lagoon-habitat-carbonate-dynamics-due-to-sea-cucumber-bioturbation-in-a-high-pco2-environment
#7
Kennedy Wolfe, Francisco Vidal-Ramirez, Sophie Dove, Dione Deaker, Maria Byrne
The effects of global change on biological systems and functioning are already measureable, but how ecological interactions are being altered is poorly understood. Ecosystem resilience is strengthened by ecological functionality, which depends on trophic interactions between key species and resilience generated through biogenic buffering. Climate-driven alterations to coral reef metabolism, structural complexity and biodiversity are well documented, but the feedbacks between ocean change and trophic interactions of non-coral invertebrates are understudied...
July 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28727217/adaptation-strategies-to-climate-change-in-marine-systems
#8
Dana D Miller, Yoshitaka Ota, U Rashid Sumaila, Andrés M Cisneros-Montemayor, William W L Cheung
The world's oceans are highly impacted by climate change and other human pressures, with significant implications for marine ecosystems and the livelihoods that they support. Adaptation for both natural and human systems is increasingly important as a coping strategy due to the rate and scale of ongoing and potential future change. Here, we conduct a review of literature concerning specific case studies of adaptation in marine systems, and discuss associated characteristics and influencing factors, including drivers, strategy, timeline, costs, and limitations...
July 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28727214/what-plant-functional-traits-can-reduce-nitrous-oxide-emissions-from-intensively-managed-grasslands
#9
Diego Abalos, Jan Willem van Groenigen, Gerlinde B De Deyn
Plant species exert a dominant control over the nitrogen (N) cycle of natural and managed grasslands. Although in intensively managed systems that receive large external N inputs the emission of the potent greenhouse gas nitrous oxide (N2 O) is a crucial component of this cycle, a mechanistic relationship between plant species and N2 O emissions has not yet been established. Here we use a plant functional trait approach to study the relation between plant species strategies and N2 O emissions from soils. Compared to species with conservative strategies, species with acquisitive strategies have higher N uptake when there is ample N in the soil, but also trigger N mineralization when soil N is limiting...
July 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28727210/thermal-affinity-as-the-dominant-factor-changing-mediterranean-fish-abundances
#10
Or Givan, Dor Edelist, Oren Sonin, Jonathan Belmaker
Recent decades have seen profound changes in species abundance and community composition. In the marine environment, the major anthropogenic drivers of change comprise exploitation, invasion by non-indigenous species, and climate change. However, the magnitude of these stressors has been widely debated and we lack empirical estimates of their relative importance. In this study, we focused on Eastern Mediterranean, a region exposed to an invasion of species of Red Sea origin, extreme climate change, and high fishing pressure...
July 20, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28722275/the-role-of-plant-phenology-in-stomatal-ozone-flux-modelling
#11
Alessandro Anav, Qiang Liu, Alessandra De Marco, Chiara Proietti, Flavia Savi, Elena Paoletti, Shilong Piao
Plant phenology plays a pivotal role in the climate system as it regulates the gas exchange between the biosphere and the atmosphere. The uptake of ozone by forest is estimated through several meteorological variables and a specific function describing the beginning and the termination of plant growing season; actually, in many risk assessment studies, this function is based on a simple latitude and topography model. In this study, using two satellite datasets, we apply and compare six methods to estimate the start and the end dates of the growing season across a large region covering all Europe for the year 2011...
July 19, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28722208/proper-estimate-of-residue-input-as-condition-for-understanding-drivers-of-soil-carbon-dynamics
#12
Sonja G Keel, Juliane Hirte, Samuel Abiven, Chloé Wüst-Galley, Jens Leifeld
The close link between carbon (C) inputs to the soil and soil organic carbon (SOC) stocks is well documented for agroecosystems (Buyanovsky & Wagner 1998). Hence, correctly calculated and unbiased C inputs are critical for the study and interpretation of soil C dynamics. In a recent paper, Luo et al. (2017) demonstrate that SOC dynamics in agricultural systems are mainly driven by, in order of importance, the amount and quality of C inputs to the soil from plant residues, climate, and soil properties including the amount and composition of soil C...
July 19, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28722164/a-unifying-explanation-for-variation-in-ozone-sensitivity-among-woody-plants
#13
Zhaozhong Feng, Patrick Büker, Håkan Pleijel, Lisa Emberson, Per Erik Karlsson, Johan Uddling
Tropospheric ozone is considered the most detrimental air pollutant for vegetation at the global scale, with negative consequences for both provisioning and climate regulating ecosystem services. In spite of recent developments in ozone exposure metrics, from a concentration-based to a more physiologically relevant stomatal flux-based index, large scale ozone risk assessment is still complicated by a large and unexplained variation in ozone sensitivity among tree species. Here we explored whether the variation in ozone sensitivity among woody species can be linked to interspecific variation in leaf morphology...
July 19, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28715138/microbial-functional-diversity-covaries-with-permafrost-thaw-induced-environmental-heterogeneity-in-tundra-soil
#14
Mengting M Yuan, Jin Zhang, Kai Xue, Liyou Wu, Ye Deng, Jie Deng, Lauren Hale, Xishu Zhou, Zhili He, Yunfeng Yang, Joy D Van Nostrand, Edward A G Schuur, Konstantinos T Konstantinidis, C Ryan Penton, James R Cole, James M Tiedje, Yiqi Luo, Jizhong Zhou
Permafrost soil in high latitude tundra is one of the largest terrestrial carbon (C) stocks and is highly sensitive to climate warming. Understanding microbial responses to warming induced environmental changes are critical to evaluating their influences on soil biogeochemical cycles. In this study, a functional gene array (i.e. GeoChip 4.2) was used to analyze the functional capacities of soil microbial communities collected from a naturally degrading permafrost region in Central Alaska. Varied thaw history was reported to be the main driver of soil and plant differences across a gradient of minimally, moderately and extensively thawed sites...
July 17, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28715112/effects-of-free-air-carbon-dioxide-enrichment-face-on-nitrogen-assimilation-and-growth-of-winter-wheat-under-nitrate-and-ammonium-fertilization
#15
Markus Dier, Rieke Meinen, Martin Erbs, Lena Kollhorst, Christin-Kirsty Baillie, David Kaufholdt, Martin Kücke, Hans-Joachim Weigel, Christian Zörb, Robert Hänsch, Remy Manderscheid
A two year Free Air CO2 Enrichment (FACE) experiment was conducted with winter wheat. It was investigated whether elevated atmospheric CO2 concentrations (e[CO2 ]) inhibit nitrate assimilation and whether better growth and nitrogen acquisition under e[CO2 ] can be achieved with an ammonium based fertilization as it was observed in hydroponic culture with wheat. Under e[CO2 ] a decrease of nitrate assimilation has been discussed as the cause for observed declines in protein concentration in C3 cereals. Wheat was grown under ambient [CO2 ] and e[CO2 ] (600 ppm) with three levels (deficiency, optimal and excessive) of nitrate based fertilization (calcium ammonium nitrate; CAN) or with optimal ammonium based fertilization...
July 17, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28712146/a-reversal-of-the-shift-towards-earlier-spring-phenology-in-several-mediterranean-reptiles-and-amphibians-during-the-1998-2013-warming-slowdown
#16
Roger Prodon, Philippe Geniez, Marc Cheylan, Florence Devers, Isabelle Chuine, Aurelien Besnard
Herps, especially amphibians, are particularly susceptible to climate change, since temperature tightly controls many parameters of their biological cycle - above all, their phenology. The timing of herps' activity or migration period - in particular the dates of their first appearance in spring and first breeding - and the shift to earlier dates in response to warming since the last quarter of the 20(th) century has often been described up to now as a nearly monotonic trend towards earlier phenological events...
July 16, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28712139/warming-drives-a-front-of-white-spruce-establishment-near-western-treeline-alaska
#17
Amy E Miller, Tammy L Wilson, Rosemary L Sherriff, James Walton
Regional warming has led to increased productivity near the boreal forest margin in Alaska. To date, the effects of warming on seedling recruitment have received little attention, in spite of forecasted forest expansion. Here, we used stand structure and environmental data from ninety-five white spruce (Picea glauca) plots sampled across a longitudinal gradient in southwest Alaska to explore factors influencing spruce establishment and recruitment near western treeline. We used total counts of live seedlings, saplings, and trees, representing five life stages, to evaluate whether geospatial, climate, and measured plot covariates predicted abundance, using current abundance distributions as a surrogate for climate conditions in the past...
July 16, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28712135/long-term-changes-in-abundances-of-sonoran-desert-lizards-reveal-complex-responses-to-climatic-variation
#18
Aaron D Flesch, Philip C Rosen, Peter Holm
Understanding how climatic variation affects animal populations and communities is essential for addressing threats posed by climate change, especially in systems where impacts are projected to be high. We evaluated abundance dynamics of five common species of diurnal lizards over 25 years in a Sonoran Desert transition zone where precipitation decreased and temperature increased across time, and assessed hypotheses for the influence of climatic flux on spatiotemporal variation in abundances. We repeatedly surveyed lizards in spring and summer of each year at up to 32 sites, and used hierarchical mixture models to estimate detection probabilities, abundances, and population growth rates...
July 16, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28712133/aquatic-export-of-young-dissolved-and-gaseous-carbon-from-a-pristine-boreal-fen-implications-for-peat-carbon-stock-stability
#19
A Campeau, K Bishop, M F Billett, M H Garnett, H Laudon, J A Leach, M B Nilsson, M G Öquist, M B Wallin
The stability of northern peatland's carbon (C) store under changing climate is of major concern for the global C cycle. The aquatic export of C from boreal peatlands is recognized as both a critical pathway for the remobilization of peat C stocks as well as a major component of the net ecosystem C balance (NECB). Here, we present a full year characterization of radiocarbon content ((14) C) of dissolved organic carbon (DOC), carbon dioxide (CO2 ) and methane (CH4 ) exported from a boreal peatland catchment coupled with (14) C characterization of the catchment's peat profile of the same C-species...
July 16, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28712130/the-role-of-protected-areas-in-land-use-land-cover-change-and-the-carbon-cycle-in-the-conterminous-united-states
#20
Xiaoliang Lu, Yuyu Zhou, Yaling Liu, Le Page Yannick
Protected Areas (PAs) cover about 22% of the conterminous U.S. Understanding their role on historical land use and land cover change (LULCC) and on the carbon cycle is essential to provide guidance for environmental policies. In this study, we compiled historical LULCC and PAs data to explore these interactions within the terrestrial biogeochemistry model (TEM). We found that intensive LULCC occurred in the conterminous U.S. from 1700 to 2005. More than three million km(2) of forest, grassland and shrublands were converted into agricultural lands, which caused 10,607 Tg C release from land ecosystems to atmosphere...
July 16, 2017: Global Change Biology
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