Controls of nitrogen isotope patterns in soil profiles

To determine the dominant processes controlling nitrogen (N) dynamics in soils and increase insights into soil N cycling from nitrogen isotope (?15N) data, patterns of 15N enrichment in soil profiles were compiled from studies on tropical, temperate, and boreal systems. The maximum 15N enrichment between litter and deeper soil layers varied strongly with mycorrhizal fungal association, averaging 9.6 � 0.4? in ectomycorrhizal systems and 4.6 � 0.5? in arbuscular mycorrhizal systems. The 15N enrichment varied little with mean annual temperature, precipitation, or nitrification rates. One main factor controlling 15N in soil profiles, fractionation against 15N during N transfer by mycorrhizal fungi to host plants, leads...

Categories: Publication; Types: Citation, Journal Citation; Tags: Biogeochemistry, Denitrification, Isotopic fractionation, Modeling, Mycorrhizal fungi, All tags... Nitrogen isotopes, Soil horizons, Soil mixing, Springer Netherlands, Fewer tags

Determination of migratory dynamics of the sooty shearwater in the Pacific using stable carbon and nitrogen isotope analysis

Categories: Publication; Types: Citation; Tags: ASFA 1: Biological Sciences & Living Resources; Oceanic Abst, Carbon 13, Diets, Feeding behaviour, Feeding migrations, All tags... IN, North Pacific, Juveniles, Marine birds, Nitrogen isotopes, Puffinus griseus, Q1 01421 Migrations and rhythms; O 1070 Ecology/Community St, Sooty shearwater, food webs, seasonal variations, Fewer tags

Controls on N retention and exports in a forested watershed

Categories: Publication; Types: Citation; Tags: Acidification, Biogeochemical cycle, Catchment Areas, Catchment area, Fertilizers, All tags... Forest Watersheds, Forests, Geochemistry, Leaching, Nitrification, Nitrogen, Nitrogen Cycle, Nitrogen isotopes, Nutrient cycles, SW 0880 Chemical processes; SW 0810 General; Q5 01503 Charac, Soil Chemistry, Soil science, Soils, Streams, Streams (in natural channels), Tracer techniques, Tracers, USA, Maine, USA, Maine, USA, Maine, Bear Brook, Water Resources Abstracts; ASFA 3: Aquatic Pollution & Envir, Watersheds, ammonium sulfate, Fewer tags

Direct effects of ambient ammonia on the nitrogen isotope ratios of fish tissues

Categories: Publication; Types: Citation; Tags: ASFA 1: Biological Sciences & Living Resources; Oceanic Abst, Ammonia, Bioaccumulation, Excretory products, Fish physiology, All tags... Gulf toadfish, Nitrogen isotopes, Opsanus beta, Q1 01346 Physiology, biochemistry, biophysics; O 1050 Verteb, Stegastes leucostictus, Trophic levels, Fewer tags

Pleistocene atmospheric variations and the nitrogen isotope dynamics of the Southern Ocean

Categories: Publication; Types: Citation; Tags: ASFA 2: Ocean Technology Policy & Non-Living Resources; ASFA, Air-sea interaction, Biogeochemistry, Cores, Nitrogen isotopes, All tags... Nutrients (mineral), Ocean-atmosphere system, Oceanic fronts, PSE, Antarctic Ocean, PSE, South Indian Ocean, Palaeoceanography, Phytoplankton, Pleistocene, Q2 02148 Palaeo-studies; Q1 01187 Palaeontology, Sediment chemistry, Fewer tags

Isotopic Composition of Nitrogen in Stomatopod (Crustacea) Tissues as an Indicator of Human Sewage Impacts on Indonesian Coral Reefs

Categories: Publication; Types: Citation; Tags: Bioindicators, Coral reefs, Corals, Crustaceans, D 04801 Pollution monitoring and detection; SW 3030 Effects , All tags... Domestic wastes, Ecology Abstracts; Water Resources Abstracts; Oceanic Abstra, Human impact, ISEW, Indonesia, Indonesia, Isotope Studies, Mantis shrimp, Marine crustaceans, Marine pollution, Nitrogen isotopes, Pollution effects, Pollution indicators, Reefs, Sewage, Stomatopoda, Stomatopoda, Wastewater Pollution, Fewer tags

Stable nitrogen isotopes as indicators of anthropogenic activities in small freshwater systems.

Categories: Publication; Types: Citation; Tags: ASFA 3: Aquatic Pollution & Environmental Quality, Anthropogenic factors, Check lists, Dissolved organic nitrogen, Food chains, All tags... Man-induced effects, Micropterus salmoides, Nitrogen isotopes, Q5 01504 Effects on organisms; Q5 01521 Mechanical and natur, Trophic relationships, USA, Rhode Island, Urbanization, Fewer tags

Implications of Subterranean Aquifers to Seagrass Habitats Along the Caribbean Coast of Mexico

Categories: Publication; Types: Citation; Tags: ASFA 1: Biological Sciences & Living Resources; ASFA 3: Aqua, ASW, Caribbean Sea, ASW, Mexico, Yucatan, Barrier reefs, Environmental effects, All tags... Ground water, Halodule wrightii, Nitrogen isotopes, Nutrients (mineral), Q1 01422 Environmental effects; Q5 01504 Effects on organism, Rainfall, Sea grass, Syringodium filiforme, Thalassia testudinum, Turtle grass, Water quality, aquifers, Fewer tags

Biomagnification and bioaccumulation of mercury in an arctic marine food web: insights from stable nitrogen isotope analysis

Categories: Publication; Types: Citation; Tags: Arctic, Arctic zone, Aves, Bioaccumulation, Biological Magnification, All tags... Biomagnification, Birds, Canada, Northwest Terr., Lancaster Sound, Canada, Northwest Territories, Chemical pollutants, Food chains, Food webs, Heavy metals, Isotopes, Marine Animals, Marine birds, Marine environment, Marine mammals, Marine molluscs, Mercury, Mya truncata, Mya truncata, Nitrogen isotopes, PNW, Canada, Northwest Terr., Lancaster Sound, Phoca hispida, Phoca hispida, Polar bear, Polar environments, Pollutants, Pollution effects, Radioactive labelling, Ringed seal, Tissue Analysis, Tissues, Toxicology Abstracts; Ecology Abstracts; Water Resources Abs, Tracers, Trophic relationships, Truncate softshell clam, Ursus maritimus, Ursus maritimus, Wildlife, X 24163 Metabolism; D 04330 Marine; SW 3030 Effects of pollu, isotopes, nitrogen, Fewer tags

Anthropogenic nitrogen deposition induces rapid ecological changes in alpine lakes of the Colorado Front Range (USA)

Categories: Publication; Types: Citation; Tags: ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 1: B, Agricultural pollution, Air Pollution Effects, Air pollution, Alpine environments, All tags... Anthropogenic factors, Atmospheric particulates, Bacillariophyceae, Chemical limnology, Diatoms, Human impact, Industrial wastes, Isotopes, Lake deposits, Lakes, Long-term changes, Man-induced effects, Nitrogen, Nitrogen compounds, Nitrogen isotopes, Particulate matter, Pollution effects, Q5 01521 Mechanical and natural changes; Q1 01463 Habitat co, USA, Colorado, USA, Colorado, agricultural pollution, alpine lakes, chemical limnology, ecological change, lake deposits, long-term changes, Fewer tags

Stable Isotopic Tracking of Land-derived Nitrogen Into Estuarine Food Webs

Categories: Publication; Types: Citation; Tags: ANW, USA, Massachusetts, Cape Cod, Waquoit Bay, ASFA 1: Biological Sciences & Living Resources; ASFA 2: Ocea, Brackishwater pollution, Eutrophication, Nitrogen isotopes, All tags... Provenance, Q1 01482 Ecosystems and energetics; Q2 02184 Composition of , Runoff, Tracers, Fewer tags

Determination of migratory dynamics of the sooty shearwater in the Pacific using stable carbon and nitrogen isotope analysis

Categories: Publication; Types: Citation; Tags: Carbon 13, D 04001 Methodology - general; D 04671 Birds; Y 25656 Birds;, Ecology Abstracts; Animal Behavior Abstracts; Oceanic Abstra, Food webs, I, Pacific, All tags... Marine birds, Migrations, Nitrogen isotopes, Pacific Ocean, Puffinus griseus, Trophic relationships, diets, methodology, migration, Fewer tags

Nitrogen isotopic variations in the Gulf of California since the last deglaciation: response to global climate change

Categories: Publication; Types: Citation; Tags: ASFA 2: Ocean Technology Policy & Non-Living Resources; ASFA, Climatic changes, Deglaciation, Holocene, ISE, Mexico, California Gulf, All tags... Nitrogen isotopes, Q2 02187 Geochemistry of sediments; Q5 01521 Mechanical and , Sediment analysis, Upwelling, Fewer tags

Temporal and spatial variability of super(13)C/ super(12)C and super(15)N/ super(14)N in pelagic biota of Prince William Sound, Alaska

Categories: Publication; Types: Citation; Tags: Alaska Gulf, Algal blooms, Carbon cycle, Carbon isotopes, Clupea pallasi, All tags... D 04330 Marine; O 1070 Ecology/Community Studies; Q1 01463 H, Ecology Abstracts; Oceanic Abstracts; ASFA 1: Biological Sci, Food organisms, INE, USA, Alaska, Alaska Gulf, INE, USA, Alaska, Alaska Gulf, Prince William Sound, Marine environment, Marine fish, Neocalanus cristatus, Nitrogen cycle, Nitrogen isotopes, Pacific herring, Pelagic environment, Phytoplankton, Ratios, Spatial heterogeneity, Temporal variations, Theragra chalcogramma, Walleye pollock, Zooplankton, seasonal variations, temporal variations, Fewer tags

Nitrogen-15 Signals of Anthropogenic Nutrient Loading in Reef Corals

Categories: Publication; Types: Citation; Tags: Anthozoa, Bioaccumulation, Coelenterates (Corals), Coral reefs, Corals, All tags... Corals, Enrichment, Eutrophication, Flower animals, Human impact, ISW, Indian Ocean, Indian Ocean, Indicator species, Indonesia, Isotope Studies, Load Distribution, Loading, Nitrogen, Nitrogen isotopes, Nutrient loading, Nutrients, P 1000 MARINE POLLUTION; Q5 01521 Mechanical and natural cha, Pacific Ocean, Pacific Ocean, Pollution Abstracts; ASFA 3: Aquatic Pollution & Environment, Pollution effects, Population Dynamics, Population-environment relations, Porites lobata, Porites lobata, Reefs, Sea anemones, Sewage, Sewage disposal, Tissue Analysis, Waste water, Wastewater Pollution, Wastewater discharges, Wastewater treatment, Water pollution, Fewer tags

Mesocosm Studies on the Influence of Phosphate Enrichment on Ammonium and Nitrate Flux in an Oligotrophic Lake

Categories: Publication; Types: Citation; Tags: *Ammonium, *Eutrophication, *Lakes, *Limiting nutrients, *Limnology, All tags... *Nitrates, *Nutrients, *Oligotrophic lakes, *Phosphates, *Phytoplankton, Bacterioplankton, Biochemistry, Biomass, Enrichment, Nitrogen isotopes, Phosphorus radioisotopes, SW 0850 Lakes; SW 3030 Effects of pollution, Water Resources Abstracts, Zooplankton, Fewer tags

Pacific salmon bring it all back home

Categories: Publication; Types: Citation; Tags: ASFA 1: Biological Sciences & Living Resources; Water Resour, Anadromous Fish, Anadromous migrations, Anadromous species, Carcasses, All tags... Degradation, Ecosystems, Energy flow, Fish Migration, Food webs, Nitrogen isotopes, Q1 01482 Ecosystems and energetics; SW 0835 Streamflow and r, Rivers, Salmonidae, Spawning migrations, Trophic relationships, Trophodynamic cycle, USA, Alaska, Iliamna L., USA, Alaska, Sashin Creek, USA, Pacific Northwest, Fewer tags

Biomagnification and bioaccumulation of mercury in an arctic marine food web: Insights from stable nitrogen isotope analysis

Categories: Publication; Types: Citation; Tags: ASFA 3: Aquatic Pollution & Environmental Quality, Analytical techniques, Bioaccumulation, Food webs, Marine organisms, All tags... Mercury, Mya truncata, Nitrogen isotopes, PNW, Canada, Northwest Terr., Lancaster Sound, Particulate organic matter, Phoca hispida, Q5 01504 Effects on organisms, Ursus maritimus, Fewer tags

Loading history of trace metals and nutrients in Altata-Ensenada del Pabellon, lagoon complex, northwestern Mexico

Categories: Publication; Types: Citation; Tags: ASFA 2: Ocean Technology Policy & Non-Living Resources; ASFA, Carbon 13, Coastal lagoons, Environmental impact, ISE, Mexico, Sinaloa, Altata Bay, All tags... ISE, Mexico, Sinaloa, Ensenada del Pabellon Lagoon, Lagoonal sedimentation, Lead 210, Man-induced effects, Nitrogen, Nitrogen isotopes, Nutrients (mineral), Pollution monitoring, Q2 02187 Geochemistry of sediments; Q5 01501 General, Sediment analysis, Sediment chemistry, Trace metals, Fewer tags

Carbon and nitrogen isotope ratios in zooplankton of the Bering, Chukchi and Beaufort seas

Categories: Publication; Types: Citation; Tags: Biogeography, Carbon isotopes, Continental shelves, Copepoda, Copepods, All tags... D 04330 Marine; O 1070 Ecology/Community Studies, Ecology Abstracts; Oceanic Abstracts, Marine environment, Nitrogen isotopes, Nutrient cycles, PNW, Chukchi Sea, Polar environments, Trophic relationships, Trophic status, Water masses, Zooplankton, Fewer tags