Results 61 to 70 of about 106,242 (267)

The IceShark, an effective method for sampling plankton under sea ice

Limnology and Oceanography: Methods, EarlyView.
Abstract Seasonal sea ice plays a crucial role in shaping coastal ecosystem dynamics throughout the circumpolar region. Of particular interest to oceanographers is the ice‐ocean interface which functions as a multidimensional habitat, supporting both sympagic algae and pelagic phytoplankton in the under‐ice surface waters.
Eleanor A. Barry, Susan Ziegler, Joey Angnatok, Emma J. Harrison, Uta Passow   +4 more
wiley   +1 more source

Metabolic Network Analysis Reveals Human Impact on Urban Nitrogen Cycles

Land
Human interactions have led to the emergence of a higher complexity of urban metabolic networks; hence, traditional natural- or agriculture-oriented biogeochemical models might not be transferred well to urban environments.
Yong Min, Hong Li, Ying Ge, Jie Chang
doaj   +1 more source

Environmental Impacts—Freshwater Biogeochemistry [PDF]

, 2015
Climate change effects on freshwater biogeochemistry and riverine loads of biogenic elements to the Baltic Sea are not straight forward and are difficult to distinguish from other human drivers such as atmospheric deposition, forest and wetland management , eutrophication and hydrological alterations. Eutrophication is by far the most well-known factor
Humborg, Christoph, Andersen, Hans Estrup, Blenckner, Thomas, Gadegast, Mathias, Giesler, Reiner, Hartmann, Jens, Hugelius, Gustaf, Hürdler, Jens, Kortelainen, Pirkko, Blicher-Mathiesen, Gitte, Venohr, Markus, Weyhenmeyer, Gesa   +11 more
openaire   +2 more sources

Chemical stabilization of glass microfiber type F filters for measuring particulate phosphorus using the extra high‐temperature dry combustion method

Limnology and Oceanography: Methods, EarlyView.
Abstract Accurate quantification of particulate phosphorus is critical for understanding biogeochemical processes in aquatic systems. Extra high‐temperature dry combustion at 800°C improves phosphorus recovery by ~ 11% compared to lower‐temperature methods.
Ying‐Yu Hu, Andrew J. Irwin, Zoe V. Finkel   +2 more
wiley   +1 more source

Effect of Carex rostrata on seasonal and interannual variability in peatland methane emissions [PDF]

, 2014
Peatlands are a large natural source of atmospheric methane (CH4), and the sedge Carex rostrata plays a critical role in the production, oxidation, and transport of CH4 in these systems.
Bubier, Jill L., Frolking, Steve, Noyce, Genevieve L, Varner, Ruth   +3 more
core   +2 more sources

Asphalted parking lots are environmental filters for multiple propagule dispersal and pollination strategies

Nordic Journal of Botany, EarlyView.
Understanding community assembly for wild species in anthropogenic settings has become increasingly important as biodiversity and ecosystem services are threatened by development pressures. Urban hardscape habitats such as parking lots are widespread, extreme, terrestrial anthropogenic environments that influence plant community assembly by way of ...
Lauren J. Frazee, Myla F. J. Aronson, Jens Kattge, Lena Struwe   +3 more
wiley   +1 more source

Nitrogen retention in the riparian zone of watersheds underlain by discontinuous permafrost [PDF]

, 2005
Thesis (M.S.) University of Alaska Fairbanks, 2005Riparian zones function as important ecotones for reducing nitrate concentration in groundwater and inputs into streams.
O'Donnell, Jonathan A.
core  

Old carbon contributes to aquatic emissions of carbon dioxide in the Amazon [PDF]

, 2014
Knowing the rate at which carbon is cycled is crucial to understanding the dynamics of carbon transfer pathways. Recent technical developments now support measurement of the ¹⁴C age of evaded CO₂ from fluvial
Garnett, M.H., Newton, J., Vihermaa, L.E., Waldron, S.   +3 more
core   +2 more sources

Impacts of reindeer grazing on phosphorus sorption and nutrient availability in a tundra site

Oikos, EarlyView.
Reindeer Rangifer tarandus, a large circumpolar herbivore, can influence whether nitrogen (N) or phosphorus (P) is the primary limiting nutrient in tundra plant communities. Specifically, findings from a site in northern Scandinavia suggest that under conditions where reindeer grazing stimulates inorganic N availability, grazing may drive ecosystems ...
Jerzy Szejgis, Johan Olofsson, Henni Ylänne, Michael J. Gundale, Reiner Giesler, Maja K. Sundqvist   +5 more
wiley   +1 more source

Observing biogeochemical cycles at global scales with profiling floats and gliders: prospects for a global array [PDF]

, 2009
Chemical and biological sensor technologies have advanced rapidly in the past five years. Sensors that require low power and operate for multiple years are now available for oxygen, nitrate, and a variety of bio-optical properties that serve as proxies ...
Berelson, W. M., Boss, E. S., Chase, Z., Claustre, H., Emerson, S. R., Gruber, N., Johnson, K. S., Körtzinger, Arne, Perry, M. J., Riser, S. C.   +9 more
core   +6 more sources