Results 81 to 90 of about 70,104 (239)

Application of impulse radar to continuous profiling of tephra-bearing lake sediments and peats: an initial evaluation

, 1985
Subsurface interface radar SIR, or impulse radar, uses electromagnetic pulses for continuous stratigraphic profiling. It has been applied to lake sediments (dy-gyttja) and peat deposits containing a sequence of thin, late Quaternary, ash-grade tephras at
Lowe, David J.
core   +1 more source

Understanding the Coastal Ecocline: Assessing Sea–Land Interactions at Non-tidal, Low-Lying Coasts Through Interdisciplinary Research

Frontiers in Marine Science, 2018
Coastal zones connect terrestrial and marine ecosystems forming a unique environment that is under increasing anthropogenic pressure. Rising sea levels, sinking coasts, and changing precipitation patterns modify hydrodynamic gradients and may enhance sea–
Gerald Jurasinski, Gerald Jurasinski, Manon Janssen, Maren Voss, Maren Voss, Michael E. Böttcher, Michael E. Böttcher, Martin Brede, Martin Brede, Hans Burchard, Hans Burchard, Stefan Forster, Stefan Forster, Lennart Gosch, Ulf Gräwe, Sigrid Gründling-Pfaff, Fouzia Haider, Miriam Ibenthal, Nils Karow, Ulf Karsten, Ulf Karsten, Matthias Kreuzburg, Xaver Lange, Peter Leinweber, Peter Leinweber, Gudrun Massmann, Thomas Ptak, Fereidoun Rezanezhad, Gregor Rehder, Gregor Rehder, Katharina Romoth, Hanna Schade, Hendrik Schubert, Hendrik Schubert, Heide Schulz-Vogt, Heide Schulz-Vogt, Inna M. Sokolova, Inna M. Sokolova, Robert Strehse, Viktoria Unger, Julia Westphal, Bernd Lennartz, Bernd Lennartz   +42 more
doaj   +1 more source

High Diversity of Planctomycetes in Soils of Two Lichen-Dominated Sub-Arctic Ecosystems of Northwestern Siberia

Frontiers in Microbiology, 2016
A wide variety of terrestrial ecosystems in tundra have a ground vegetation cover composed of reindeer lichens (genera Cladonia and Cetraria). The microbial communities of two lichen-dominated ecosystems typical of the sub-arctic zone of northwestern ...
A. Ivanova, I. S. Kulichevskaya, A. Merkel, S. Toshchakov, S. Dedysh   +4 more
semanticscholar   +1 more source

The Unexpected Discovery of Paleocene? Coals in Outcrops Thought to Be Cambrian, Al Huqf, Oman

Journal of Petroleum Geology, EarlyView.
ABSTRACT Two brown organic deposits were encountered whilst investigating kaolinitic claystones thought to occur at the base of a Cambrian formation at outcrop. The age of these organic deposits is probably Paleocene from palynology. Organic petrography shows that they are subbituminous coals with some oil source potential.
Mohammed H. Al Kindi, Alan P. Heward, Lorraine B. Eglinton, Steve R. Packer, Darrin T. Stead   +4 more
wiley   +1 more source

Provenance of tetraether membrane lipids in a large temperate lake (Loch Lomond, UK): implications for glycerol dialkyl glycerol tetraether (GDGT)-based palaeothermometry [PDF]

Biogeosciences, 2014
The application of glycerol dialkyl glycerol tetraether (GDGT)-based palaeoenvironmental proxies, such as the branched vs. isoprenoidal tetratether (BIT) index, TEX86 and the MBT–CBT palaeothermometer, has lately been expanded to lacustrine sediments ...
L. K. Buckles, J. W. H. Weijers, X.-M. Tran, S. Waldron, J. S. Sinninghe Damsté   +4 more
doaj   +1 more source

Small‐scale adaptation to geothermal soil heating in a perennial herb revealed by combining crosses and transplantations

New Phytologist, EarlyView.
Path diagrams showing the results of piecewise structural equation models examining how fitness (total number of seeds in flowering individuals) of Cerastium fontanum depended on temperature at planting site, temperature difference, mating type, and flowering time (FFD, first flowering date) in each of the two study years.
Alicia Valdés, Vigdís F. Helmutsdóttir, Bryndís Marteinsdóttir, Johan Ehrlén   +3 more
wiley   +1 more source

Extent, causes and rates of upland soil erosion in England and Wales [PDF]

, 2000
The uplands of England and Wales are internationally important for nature conservation and are prized nationally for their landscape, recreational and cultural value.
McHugh, Marianne
core  

Interaction of Peat Soil and Sulphidic Material Substratum: Role of Peat Layer and Groundwater Level Fluctuations on Phosphorus Concentration

, 2015
Phosphorus (P) often becomes limiting factor for plants growth. Phosphorus geochemistry in peatland soil is associated with the presence of peat layer and groundwater level fluctuations.
Fahmi, Arifin, Radjagukguk, Bostang, Purwanto, Benito Heru   +2 more
core   +2 more sources

Distribution Characteristics of Soil Organic Carbon and Active Carbon Components in the Peat Swamp Wetlands of the Altai Mountains, China

Land
Peat swamp wetlands, crucial carbon pools in terrestrial ecosystems, significantly impact regional carbon cycling and climate change. In this study, the peat swamp wetland in the Altay Mountains was selected as the research object.
Guanghua Miao, Yanhong Li, Chongru Shi
doaj   +1 more source

Effect of past peat cultivation practices on present dynamics of dissolved organic carbon.

Science of the Total Environment, 2017
Peatlands are a major source of dissolved organic carbon (DOC) for aquatic ecosystems. Naturally high DOC concentrations in peatlands may be increased further by drainage.
S. Frank, B. Tiemeyer, M. Bechtold, Andreas Lücke, Roland Bol   +4 more
semanticscholar   +1 more source