Results 61 to 70 of about 17,794 (245)

Biogeochemical Processes in the Active Layer and Permafrost of a High Arctic Fjord Valley

Frontiers in Earth Science, 2020
Warming of ground is causing microbial decomposition of previously frozen sedimentary organic carbon in Arctic permafrost. However, the heterogeneity of the permafrost landscape and its hydrological processes result in different biogeochemical processes ...
Eleanor L. Jones, Eleanor L. Jones, Andrew J. Hodson, Andrew J. Hodson, Steven F. Thornton, Kelly R. Redeker, Jade Rogers, Peter M. Wynn, Timothy J. Dixon, Simon H. Bottrell, H. Brendan O’Neill   +10 more
doaj   +1 more source

Ecological scale mediates nonlinear relationships of animal nutrient excretion with dissolved organic matter

Journal of Animal Ecology, EarlyView.
We show that nutrient excretion by vertebrates and invertebrates varies nonlinearly with dissolved organic matter concentration and composition and by taxonomic rank, with stronger patterns at the individual compared to the community level. Our findings highlight the importance of examining animal‐mediated nutrient cycling across taxa and ecological ...
Sandra Klemet‐N'Guessan, Marina Taskovic, Nolan J. T. Pearce, Marguerite A. Xenopoulos   +3 more
wiley   +1 more source

From foraging to decomposition: Large vertebrates as biotic drivers of trace element cycling across landscapes

Journal of Animal Ecology, EarlyView.
We highlight an overlooked pathway in ecosystem functioning: the role of animal carcass decomposition in trace element cycling. By linking animal life cycles to landscape‐scale processes, we explain how large animals redistribute scarce elements and influence spatial heterogeneity, with implications for ecosystem functioning and restoration.
Elke Wenting, Henk Siepel, Elisabeth S. Bakker, Michael S. Strickland, Laurel Lynch, Harry Olde Venterink, Philip S. Barton   +6 more
wiley   +1 more source

The superposition method for the reconstruction of food webs

Methods in Ecology and Evolution, EarlyView.
Abstract Understanding trophic positions is essential for analysing complex food webs. While calculating these positions can be straightforward when feeding relationships and their proportions are known, determining diet coefficients traditionally requires substantial time and effort.
Ettore Barbieri, Naoto F. Ishikawa
wiley   +1 more source

Biogeochemical, sedimentological and dinoflagellate‐based reconstruction of the Holocene palaeoenvironment of the east Limfjord, Denmark

Boreas, EarlyView.
To assess how the eastern part of the Limfjord system has changed over the Holocene, relative to the wider Limfjord and western Baltic region, a sedimentary succession spanning c. 9600–150 cal. a BP was collected from Nibe Bredning, near Sebbersund, from a shallow coastal inlet along the eastern connection between the Limfjord and the Kattegat (north ...
Gabriella M. Weiss, Jonathan P. Lewis, Paula J. Reimer, David B. Ryves, Peter Rasmussen, Jesper Olsen   +5 more
wiley   +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; id_orcid 0000-0003-2465-583X, 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

Marine migration influences mercury accumulation in anadromous Arctic char (Salvelinus alpinus)

Journal of Fish Biology, EarlyView.
Abstract Mercury (Hg) is a globally distributed toxic metal present in northern natural environments that biomagnifies in food webs and bioaccumulates in apex predator fish, such as Arctic char (Salvelinus alpinus)—an iteroparous species with a circumpolar distribution. Arctic char exhibit a variety of life history types, with the migrating, anadromous
Isabel R. Hilgendag, Michael Power, Mehdi M. Aqdam, Christopher W. Lewis, Zoya Martin, Ashley D. Ehrman, Heidi K. Swanson   +6 more
wiley   +1 more source

Viruses in aquatic ecosystems: important advancements of the last 20 years and prospects for the future in the field of microbial oceanography and limnology

Advances in Oceanography and Limnology, 2010
Over the last two decades, viruses in aquatic systems have been observed to modify, influence and control aquatic systems. Since the determination decades ago that viruses were abundant in aquatic ecosystems, researchers have demonstrated that viruses ...
Stéphan Jacquet, Takeshi Miki, Rachel Noble, Peter Peduzzi, Steven Wilhelm   +4 more
doaj   +1 more source

Partial mycoheterotrophy: a common strategy in arbuscular mycorrhizal plants?

New Phytologist, EarlyView.
Proposed autotrophy to mycoheterotrophy continuum among arbuscular mycorrhizal plants. Summary The vast majority of land plants transfer part of the organic carbon they produce by photosynthesis to arbuscular mycorrhizal (AM) fungi inside their root cells; the fungi in turn help plants to take up nutrients and water from the soil.
Vincent S. F. T. Merckx, Cas Verbeek, Tomas Figura, Jada Carter, Izai A. B. S. Kikuchi, Franziska E. Zahn, Gerhard Gebauer, Sean W. Graham, Kenji Suetsugu, Deyi Wang   +9 more
wiley   +1 more source

Operationalizing soil persistence in soil and ecosystem ecology

New Phytologist, EarlyView.
Trade‐offs between soil persistence and the provision of certain soil services and activity/functions.
Matthias C. Rillig, Laurent Philippot, Johannes Lehmann   +2 more
wiley   +1 more source