A model of biogeochemical cycles of carbon, nitrogen, and phosphorus including symbiotic nitrogen fixation and phosphatase production
نویسندگان
چکیده
منابع مشابه
The impact of grassland management on biogeochemical cycles involving carbon, nitrogen and phosphorus
Grassland introduction into intensively managed agricultural landscapes may enhance soil organic matter (SOM) content and ecosystem services. However, the magnitude of this effect depends on grassland management practices, and their influence on the soil system. The aim of this paper is to highlight these impacts and their consequences for SOM dynamics and element cycling. We focused in particu...
متن کاملSymbiotic Nitrogen Fixation.
Biosphere nitrogen is subjected to rapid turnover, and because it is eventually lost as nitrogen into the atmosphere, its maintenance requires continuous replenishment with reduced nitrogen from atmospheric nitrogen. Biological reduction of nitrogen to ammonia can be performed only by some prokaryotes and is a highly oxygen-sensitive process. The most efficient nitrogen fixers establish a symbi...
متن کاملA Watershed-Scale Biogeochemical Loading Model for Nitrogen and Phosphorus
The New York State Water Resources Institutes (NYSWRI) FY2001 activity under the Federal Water Resources Research Act consisted largely of eleven research projects funded during FY1999, FY2000, and FY2001. The FY 2001 Annual Report reports on a FY2000 project and a FY 2001 project from national 104G competitions, one project from a supplemental funding source, one from the FY 1999 New York Stat...
متن کاملthe innovation of a statistical model to estimate dependable rainfall (dr) and develop it for determination and classification of drought and wet years of iran
آب حاصل از بارش منبع تأمین نیازهای بی شمار جانداران به ویژه انسان است و هرگونه کاهش در کم و کیف آن مستقیماً حیات موجودات زنده را تحت تأثیر منفی قرار می دهد. نوسان سال به سال بارش از ویژگی های اساسی و بسیار مهم بارش های سالانه ایران محسوب می شود که آثار زیان بار آن در تمام عرصه های اقتصادی، اجتماعی و حتی سیاسی- امنیتی به نحوی منعکس می شود. چون میزان آب ناشی از بارش یکی از مولفه های اصلی برنامه ...
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ژورنال
عنوان ژورنال: Global Biogeochemical Cycles
سال: 2007
ISSN: 0886-6236
DOI: 10.1029/2006gb002797