Results 81 to 90 of about 323,752 (388)
, 2011 This chapter presents a brief introduction to radiation physics, summarizes how exposure to radioactive elements is measured, and how radiation can affect biological tissue. It provides an overview of the considerable research that has been conducted to quantify environmental exposure of and effects on biota from both naturally occurring and man-made ...
Cameron Irvine, Bradley E. Sample
openaire +2 more sources
Soil biota contributions to soil aggregation
Nature Ecology & Evolution, 2017 Humankind depends on the sustainability of soils for its survival and well-being. Threatened by a rapidly changing world, our soils suffer from degradation and biodiversity loss, making it increasingly important to understand the role of soil ...
A. Lehmann, Weishuang Zheng, M. Rillig
semanticscholar +1 more source
The Depositional Record, EarlyView.The Joulters ooid sandbody of northern Great Bahama Bank is a vast expanse of muddy ooid sands partly rimmed by clean ooid sands and formed into a relatively thick layer of significant extent. Knowledge of the development of depositional and diagenetic patterns in the Joulters example has forwarded our general understanding of carbonate sedimentology ...
Paul (Mitch) Harris
wiley +1 more source
The potential impact of Ocean Thermal Energy Conversion (OTEC) on fisheries [PDF]
, 1986 The commercial development of ocean thermal energy conversion (OTEC) operations will involve some environmental perturbations for which there is no precedent experience. The pumping of very large volumes of warm surface water and cold deep water and its
David S. Peters +8 more
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Taming the waterways: The Europeanization of Southern Québec's riverside landscapes during the 16th–18th centuries [PDF]
, 2018 The arrival of Europeans in the New World effected the interaction of 2 temperate biogeographical eco-zones: the Palaearctic and Nearctic. Alfred Crosby has hypothesized that the success of the Europeans as imperialists was due, in part, to the ability ...
King, Gary, Muller, Thomas
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Global marine redox changes drove the rise and fall of the Ediacara biota
Geobiology, 2019 The role of O2 in the evolution of early animals, as represented by some members of the Ediacara biota, has been heavily debated because current geochemical evidence paints a conflicting picture regarding global marine O2 levels during key intervals of ...
Feifei Zhang +10 more
semanticscholar +1 more source
Bahaman patch reefs: Numerous and neglected
The Depositional Record, EarlyView.Abstract Phanerozoic patch reefs are extensively studied because they are abundant and are potential reservoirs for valuable fluids. In contrast, geologic studies of modern reefs have largely focused on platform margins, leaving patch reefs comparatively neglected. What conditions favour patch‐reef development?
Paul Enos, Clay Robertson
wiley +1 more source
A review of the environments, biota, and methods used in microplastics research in South Africa
South African Journal of ScienceMicroplastics are small plastic materials often defined as those between 5 mm and 0.05 mm in size. Microplastics can have toxicological impacts on various biota, from gut blockages to the transport or leaching of toxicants used in their production or ...
Heinrich T.J. Dahms, Richard Greenfield
doaj +1 more source
Sediment‐stressed reefs over the past 420 Myr
The Depositional Record, EarlyView.In order to fully elucidate the relationship between siliciclastic sedimentation and reef development, there needs to be a significant step change in how we record ancient and recent reefs. Only through the collection of constrained quantitative data, we can progress beyond the largely conjectural associations postulated for many ancient reefal systems.
Tanja Unger +4 more
wiley +1 more source
Soil biota in grassland, its ecosystem services and the impact of management [PDF]
, 2007 In the search for sustainable grassland systems, self-regulating processes in the soil become increasingly important. Soil biota play an important role in these processes and in the provision of various ecosystem services. For grassland systems important
Murray, P.J. +2 more
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