Essays about: "acetylene reduction"
Found 4 essays containing the words acetylene reduction.
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1. Nitrogen fixation by cyanobacteria associated to feathermosses : a comparison between Scots pine and Norway spruce stands
University essay from SLU/Dept. of Forest Ecology and ManagementAbstract : The limitations of available nutrients are strong in the boreal forest, especially of nitrogen (N). Due to slow mineralization rate of organic soil nitrogen, caused by low temperatures and acidic soils. Few organisms can fixate atmospheric nitrogen. Among those who have the ability there are some that are common in the boreal forest. READ MORE
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2. Nitrogen fixation among boreal feather mosses along a clear-cut chronosequence
University essay from SLU/Dept. of Forest Ecology and ManagementAbstract : The Swedish boreal forests are limited by nitrogen (N) availability. While biological N2 fixation by cyanobacteria hosted by pleurocarpous feather mosses are important sources of N input to natural boreal forest ecosystems, little is known about the patterns of N2 fixation in silvicultural systems. READ MORE
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3. The effect of moisture, litter and stand age on N fixation in the feathermoss, Pleurozium schreberi
University essay from SLU/Dept. of Forest Ecology and ManagementAbstract : The largest known natural input of nitrogen (N) into the boreal forests occurs through biological fixation by cyanobacteria that live in association with the moss Pleurozium schreberi. There is currently limited knowledge about the factors responsible for the variation in N fixation rates, and specifically what factors drive variability between stands. READ MORE
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4. The effects of heavy metals on denitification in a wetland sediment..
University essay from Tema vatten i natur och samhälleAbstract : Wetlands water quality is influenced by the anthopogenic activities in the catchments’ areas. Wastewaters from the urban storm, agricultural runoff and sewage treatment often end up in wetlands before flowing to rivers, lakes and the sea. READ MORE