Results 121 to 130 of about 251 (207)

Low‐Temperature in Situ Upgrading of Ultra‐Deep Heavy Oil Using Ni–Ce/MOF–OTf Superacid Catalysts to Enhance Energy Utilization and Sustainability

EcoEnergy, EarlyView.
A triflate‐functionalized Ni–Ce/MOF–OTf superacid enables low‐temperature (∼140°C) in situ upgrading of ultra‐deep heavy oil. It reduces viscosity by 92.11% in 12 h, maintains activity over cycles, and delivers 90.25% recovery with a lower carbon footprint by selective bond cleavage. ABSTRACT Ultra‐deep heavy oil is an important unconventional resource,
Li Wang, Ji‐Xiang Guo, Qiming Huang, Kunpeng Li, Chi Li, Yajie Wu   +5 more
wiley   +1 more source

PondNet – towards a global network of experiments on the effects of climate change on aquatic ecosystems

Ecography, EarlyView.
Global change is reshaping the distribution of biodiversity and the functioning of ecosystems. Predicting the long‐term consequences of such changes remains a challenge due to a need for a clear understanding of the mechanisms underpinning ecosystem‐level responses, as well as the role of geographical and environmental contingencies.
Miguel G. Matias, Dominique Gravel, Jonathan M. Chase, Carla Pinto‐ Cruz, David García‐ Callejas, M. Thomas P. Gilbert, Mathew A. Leibold, Dora Neto, Cátia L. Pereira, Carlos Ramos, Pedro M. Raposeiro, Alejandro Rozenfeld, Katarzyna Sroczynska, David R. Vieites, Guy Woodward, Miguel B. Araújo   +15 more
wiley   +1 more source

Impact of bed roughness configurations on flow dynamics and hydraulic resistance in open-channel flows. [PDF]

Sci Rep
Anzani HS, Kantoush SA, Kobayashi S.
europepmc   +1 more source

Zero or not? Causes and consequences of zero-flow stream gage readings. [PDF]

WIREs Water, 2020
Zimmer MA, Kaiser KE, Blaszczak JR, Zipper SC, Hammond JC, Fritz KM, Costigan KH, Hosen J, Godsey SE, Allen GH, Kampf S, Burrows RM, Krabbenhoft CA, Dodds W, Hale R, Olden JD, Shanafield M, DelVecchia AG, Ward AS, Mims MC, Datry T, Bogan MT, Boersma KS, Busch MH, Jones CN, Burgin AJ, Allen DC.   +26 more
europepmc   +1 more source

Enemy release: loss of parasites in invasive freshwater bivalves Sinanodonta woodiana and Corbicula fluminea

Ecography, EarlyView.
Invasive freshwater bivalves harm native species, ecosystems and biodiversity, and incur economic costs. The enemy release hypothesis posits that invasive species are released from enemies during the invasion process, giving them a competitive advantage in the new environment.
Binglin Deng, Nicoletta Riccardi, Pin Nie, Maria Urbańska, Timo J. Marjomäki, Wojciech Andrzejewski, Małgorzata Ożgo, Keiko Nakamura, Jouni Taskinen   +8 more
wiley   +1 more source

Atypical responses of a large catchment river to the Holocene sea-level highstand: The Murray River, Australia. [PDF]

Sci Rep, 2020
Helfensdorfer AM, Power HE, Hubble TCT.
europepmc   +1 more source

From distant shores to an emerging island: the role of surface and subsurface transport in modeling seed dispersal

Ecography, EarlyView.
Long‐distance seed dispersal by ocean currents plays a critical role in structuring coastal plant communities. As direct observations of this phenomenon are infeasible, numerical modeling is a valuable tool. Here, we use Lagrangian particle tracking to examine the colonization of the newly forming island Norderoogsand (German Bight, Wadden Sea) by five
Jakob Rahner, Rahel Vortmeyer‐Kley, Ulf Gräwe, Michael Kleyer, Ulrike Feudel   +4 more
wiley   +1 more source

Macroecological relationships of ant diversity with increasing aridity in Australian tropical savannas: contrasting responses of epigaeic and hypogaeic assemblages

Ecography, EarlyView.
Studies using climatic gradients play a key role in our understanding of the importance of rainfall and temperature as factors regulating species diversity and distribution, and thus of likely responses to climate change. However, such studies currently consider above‐ground species only, ignoring the diverse hypogaeic (subterranean) invertebrate fauna.
François Brassard, Giovanny Destour, Tristan Klaftenberger, Alan N. Andersen   +3 more
wiley   +1 more source

Riprap mitigation of downstream scour at grade-control structures considering tailwater depth and layer thickness. [PDF]

Sci Rep
Mohammadnezhad H, Mohammadi M, Ghaderi A.   +2 more
europepmc   +1 more source

Incorporating sampling bias into ENM/SDM permutation tests: new methods and a case study on neotropical ants

Ecography, EarlyView.
Spatial sampling bias in occurrence data can generate spurious environmental associations in models of species distributions and ecological niches, and can also undermine inferences based on permutation tests made using these models. Geographic randomization tests are often used to generate distributions of expected behavior under the null hypothesis ...
Dan L. Warren, Alexandre Cassadei‐Ferreira, Evan P. Economo, Russell Dinnage, Jamie M. Kass   +4 more
wiley   +1 more source