Results 71 to 80 of about 23,480 (273)

UAVs unveil the role of small scale vegetation structure on wader nest survival

Remote Sensing in Ecology and Conservation, EarlyView.
In this study, we combine high‐resolution vegetation structural metrics derived from unmanned aerial vehicle (UAV) imagery with on‐field wader nest survival monitoring. We show that the immediate vegetation height and heterogeneity within a 2‐meter buffer surrounding the clutch of the recorded ground‐nesting wader species positively influenced its ...
Miguel Silva‐Monteiro, Miguel Villoslada, Thaisa Bergamo, Triin Kaasiku, Camilo Carneiro, David Kleijn   +5 more
wiley   +1 more source

A holocene n-alkane stable isotope record from Wonderwerk Cave, South Africa and its implications for the later stone age record

Scientific Reports
Sediment biomarkers are important archives of regional, and global climate signatures, particularly in regions which lack continuous terrestrial archives such as the semi-arid deserts of Africa.
Michaela Ecker, Sara Rhodes, Nils Andersen, Liora Kolska Horwitz, Michael Chazan, Cheryl A. Makarewicz   +5 more
doaj   +1 more source

Age of the Rotoehu Ash. Comment. [PDF]

, 1995
Suggests that the article by Whitehead & Ditchburn (1994), although presenting useful new data on 230Th/232Th analyses, is flawed and misleading in suggesting that the Rotoiti Tephra is considerably younger than c.
Hogg, Alan G., Lowe, David J.
core   +1 more source

Possible Jurassic age for part of Rakaia Terrane: implications for tectonic development of the Torlesse accretionary prism [PDF]

, 2001
Greywacke sandstone and argillite beds comprising Rakaia Terrane (Torlesse Complex) in mid Canterbury, South Island, New Zealand, are widely regarded as Late Triassic (Norian) in age based on the occurrence of Torlessia trace fossils, Monotis, and other ...
Andrews P. B., Bishop D. G., Bradshaw J. D., Campbell J. D., Galbraith R. F., Gleadow A. J. W., Grant‐Taylor T. L., Gregg D. R., MacKinnon T. C., Mazengarb C., Nathan S., Oliver P. J., Suggate R. P., Tagami T., Warren G.   +14 more
core   +2 more sources

Wall‐to‐wall Amazon forest height mapping with Planet NICFI, Aerial LiDAR, and a U‐Net regression model

Remote Sensing in Ecology and Conservation, EarlyView.
Tree canopy height is a key indicator of forest biomass and structure, yet accurate mapping across the Amazon remains challenging. Here, we generated a canopy height map of the Amazon forest at ~4.8 m resolution using Planet NICFI imagery and a deep learning U‐Net model trained with airborne LiDAR data.
Fabien H. Wagner, Ricardo Dalagnol, Griffin Carter, Mayumi C. M. Hirye, Shivraj Gill, Le Bienfaiteur Sagang Takougoum, Samuel Favrichon, Michael Keller, Jean P. H. B. Ometto, Lorena Alves, Cynthia Creze, Stephanie P. George‐Chacon, Shuang Li, Zhihua Liu, Adugna Mullissa, Yan Yang, Erone G. Santos, Sarah R. Worden, Martin Brandt, Philippe Ciais, Stephen C. Hagen, Sassan Saatchi   +21 more
wiley   +1 more source

Identification of depositional hiatuses in karst infillings – Example from Divje babe I cave (Slovenia)

Geologija, 2011
The Divje babe I cave is world known Paleolithic site in western Slovenia. In this paper, special interest is given to the identification of sedimentary hiatuses in karst infillings.
Janez Turk
doaj  

Principles of Radiometric Dating

Current Science, 2018
Even after more than 100 years of the initial discovery of isotopes, we are yet to fully utilize their potential in science and technology. The unique properties of isotopes of elements covering the entire periodic table have wide-ranging applications.
openaire   +1 more source

Butyltin compounds in a sediment core from the old Tilbury basin, London, UK [PDF]

, 2005
Sections from a sediment core taken from the River Thames were analysed for butyltin species using gas chromatography with species-specific isotope dilution mass spectrometry.
Almeida, Alzieu, Alzieu, Appleby, Bartlett, Batley, Bennett, Berg, Bhosle, Blunden, Booty, Broodbank, Burton, Chiron, Clark, Cundy, Dahllof, de Mora, Dowson, Dowson, Dowson, Dowson, Evans, Fent, Fent, Fernandez, Greeves, Harino, Hoch, Horiguchi, IMO, J.N. Lester, Jones, M.D. Scrimshaw, Midorikawa, R. Wahlen, Ramaswamy, Randall, Rodriguez-Gonzalez, Sarradin, Scrimshaw, Smith, Sturgeon, Sturgeon, Sudaryanto, T. Catterick, Thomas, Unger, Viglino, Voulvoulis, Voulvoulis, Wahlen, Wiese   +52 more
core   +1 more source

Historical remote sensing highlights long‐term persistence of Emperor Penguin (Aptenodytes forsteri) colonies

Remote Sensing in Ecology and Conservation, EarlyView.
Remote sensing can reveal population dynamics of Antarctic penguin colonies. In this study, we analyze emperor penguin (Aptenodytes forsteri) guano stains in remote sensing imagery and discover colony presence predating known records for 18 colonies across Antarctica.
Martynas Bielinis, Michelle LaRue, Benjamin M. Kraemer, Catalina Munteanu   +3 more
wiley   +1 more source

The implications of K-Ar glauconite dating of the Diest Formation on the paleogeography of the Upper Miocene in Belgium [PDF]

, 2014
The glauconite-rich Diest Formation in central and north Belgium contains sands in the Campine subsurface and the hilly Hageland area that can be distinguished from each other.
Adriaens, Rieko, Deckers, Jef, Harris, W Burleigh, Houthuys, Rik, Laga, Piet, Lanckacker, Timothy, Louwye, Stephen, Matthijs, Johan, Munsterman, Dirk, Vandenberghe, Noël, Verhaegen, Jasper, Vos, Koen, Wampler, JM, Westerhoff, Wim   +13 more
core