Aspects of the cycle of inorganic nitrogen compounds in the tropical rain forest of the Ivory Coast |
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| Authors: | Jean Servant Robert Delmas Jacques Rancher Marcel Rodriguez |
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| Institution: | (1) Laboratoire d'Aérologie, Université Paul Sabatier, 118, route de Narbonne, 31062 Toulouse Cedex, France;(2) Départment de Physique, Université Marien Ngouabi, B.P. 69, Brazzaville, R.P. Congo;(3) Laboratoire de Chimie Physique, Faculté des Sciences, 04 BP 322, 04 Abidjan, Côte d'Ivoire |
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| Abstract: | A partial balance of mineral N is given for the basins of two coastal rivers in a forest zone in the Ivory Coast. The dry and wet depositions on the basin surfaces is given for particulate matter (NO3
–, NH4
+). The quantity of mineral N washed away in the rivers is evaluated. The losses from leaching of the soils by rainwater are about 0.33 to 1.0% of the atmospheric depositions for NH4
+–N and 2.2 to 5.8% for NO3
––N. The yearly atmospheric input of N compounds to the ecosystem, about 1.4 g N m–2 y–1, is at least 14% of mineral N formed in the soils and is therefore quite significant. |
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| Keywords: | Tropical forest nitrate ion ammonium ion atmospheric deposition river transport |
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