Isotopic identification of nitrogen hotspots across natural terrestrial ecosystems
نویسندگان
چکیده
منابع مشابه
Nitrogen inputs accelerate phosphorus cycling rates across a wide variety of terrestrial ecosystems.
• Biologically essential elements--especially nitrogen (N) and phosphorus (P)--constrain plant growth and microbial functioning; however, human activities are drastically altering the magnitude and pattern of such nutrient limitations on land. Here we examine interactions between N and P cycles of P mineralizing enzyme activities (phosphatase enzymes) across a wide variety of terrestrial biomes...
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Gounelle, Y. Marrocchi, S. Mostefaoui, F. Robert, H. Leroux and A. Meibom. Laboratoire d’Étude de la Matière Extraterrestre, Muséum National d’Histoire Naturelle, 57, rue Cuvier, 75005, Paris, France; Laboratoire de Structure et Propriétés de l’Etat Solide, Université des Sciences et Technologies de Lille, 59655 Villeneuve d’Ascq, France; Dipartimento di Astronomia e Scienza dello Spazio, Unive...
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Dissolved organic nitrogen (DON) is present in soils and streams around the world. We are only now beginning to explore the important roles this chemically heterogeneous mixture of compounds plays in terrestrial nitrogen (N) cycling. Over centuries, DON leaching may represent a significant "leak" of N, which occurs because plants and microbes cannot prevent DON losses, even in times of high N d...
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Isotopic compositions of sulfur and concentrations of sulfur and carbon have been measured for sedimentary rocks across terrestrial Cretaceous-Tertiary (K-T) boundary successions that originated from flood-plain and backswamp environments. Organic carbon contents are relatively constant below the boundary (26 cm for the Dogie Creek section and 9 cm for the Brownie Butte section), but change abr...
متن کاملHuman-induced nitrogen-phosphorus imbalances alter natural and managed ecosystems across the globe.
The availability of carbon from rising atmospheric carbon dioxide levels and of nitrogen from various human-induced inputs to ecosystems is continuously increasing; however, these increases are not paralleled by a similar increase in phosphorus inputs. The inexorable change in the stoichiometry of carbon and nitrogen relative to phosphorus has no equivalent in Earth's history. Here we report th...
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ژورنال
عنوان ژورنال: Biogeosciences
سال: 2012
ISSN: 1726-4189
DOI: 10.5194/bg-9-3287-2012