Soil N, P, and C dynamics of upland and seasonally flooded forests of the Brazilian Pantanal
Seasonal variations in cerrado nutrient availability and mineralization are poorly understood, especially for “hyperseasonal” cerrado, which experiences both flooding and drought over an annual cycle. Here we quantified seasonal variations in soil ammonium (NH4+), phosphorus (P), and organic C (SOC)...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-10-01
|
| Series: | Global Ecology and Conservation |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2351989417302184 |
| _version_ | 1818927715126870016 |
|---|---|
| author | George L. Vourlitis Cloe S. Hentz Osvaldo Borges Pinto, Jr Edna Carneiro Jose de Souza Nogueira |
| author_facet | George L. Vourlitis Cloe S. Hentz Osvaldo Borges Pinto, Jr Edna Carneiro Jose de Souza Nogueira |
| author_sort | George L. Vourlitis |
| collection | DOAJ |
| description | Seasonal variations in cerrado nutrient availability and mineralization are poorly understood, especially for “hyperseasonal” cerrado, which experiences both flooding and drought over an annual cycle. Here we quantified seasonal variations in soil ammonium (NH4+), phosphorus (P), and organic C (SOC) concentration and net mineralization in upland and seasonally flooded cerrado forests of the Brazilian Pantanal, and hypothesized that NH4+, P, and SOC concentrations and net mineralization would decline under flooding and increase during the dry season as soil becomes unsaturated. We found that C and nutrient concentrations and mineralization were significantly affected by seasonal variations in hydrology; however, differences between flooded and upland forests varied over time and were not always related to flooding. Soil extractable P, but not net mineralization, was approximately 10-times higher in the upland forest, while the flooded forest had higher extractable NH4+ concentration than the upland forest under both flooded and drained conditions. Soil C concentration was significantly higher in the upland forest even though C mineralization was similar for both forests. Thus, despite the large seasonal and spatial variations in hydrology, the effects of flooding depended on the particular response variable studied and the season. While a limited survey of the literature indicates that forests exposed to intermittent flooding had on average higher concentrations of extractable NH4+ and P, the upland and hyperseasonal forests studied here were richer in extractable NH4+ (upland and flooded) and P (upland) compared to other upland and hyperseasonal forests and woodlands. Given that the forests studied here shared nearly a third of the total tree species and had similar physiognomy, these results suggest that nutrient controls on cerrado structural diversity may be similar in upland and hyperseasonal cerrado. |
| first_indexed | 2024-12-20T03:17:25Z |
| format | Article |
| id | doaj.art-3d4df621fe71406e8fb95e7127879e82 |
| institution | Directory Open Access Journal |
| issn | 2351-9894 |
| language | English |
| last_indexed | 2024-12-20T03:17:25Z |
| publishDate | 2017-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Global Ecology and Conservation |
| spelling | doaj.art-3d4df621fe71406e8fb95e7127879e822022-12-21T19:55:18ZengElsevierGlobal Ecology and Conservation2351-98942017-10-0112C22724010.1016/j.gecco.2017.11.004Soil N, P, and C dynamics of upland and seasonally flooded forests of the Brazilian PantanalGeorge L. Vourlitis0Cloe S. Hentz1Osvaldo Borges Pinto, Jr2Edna Carneiro3Jose de Souza Nogueira4Department of Biological Sciences, California State University, San Marcos, CA 92096, USADepartment of Biological Sciences, California State University, San Marcos, CA 92096, USADepartamento de Ciências Ambientais, Programa de Pós-Graduação Em Ciências Ambientais, Universidade de Cuiabá, Cuiabá Mato Grosso, 78060-900, BrazilDepartamento de Ciências Ambientais, Programa de Pós-Graduação Em Ciências Ambientais, Universidade de Cuiabá, Cuiabá Mato Grosso, 78060-900, BrazilInstituto de Física, Programa de Pós-Graduação em Física Ambiental, Universidade Federal de Mato Grosso, Cuiabá Mato Grosso, 78060-900, BrazilSeasonal variations in cerrado nutrient availability and mineralization are poorly understood, especially for “hyperseasonal” cerrado, which experiences both flooding and drought over an annual cycle. Here we quantified seasonal variations in soil ammonium (NH4+), phosphorus (P), and organic C (SOC) concentration and net mineralization in upland and seasonally flooded cerrado forests of the Brazilian Pantanal, and hypothesized that NH4+, P, and SOC concentrations and net mineralization would decline under flooding and increase during the dry season as soil becomes unsaturated. We found that C and nutrient concentrations and mineralization were significantly affected by seasonal variations in hydrology; however, differences between flooded and upland forests varied over time and were not always related to flooding. Soil extractable P, but not net mineralization, was approximately 10-times higher in the upland forest, while the flooded forest had higher extractable NH4+ concentration than the upland forest under both flooded and drained conditions. Soil C concentration was significantly higher in the upland forest even though C mineralization was similar for both forests. Thus, despite the large seasonal and spatial variations in hydrology, the effects of flooding depended on the particular response variable studied and the season. While a limited survey of the literature indicates that forests exposed to intermittent flooding had on average higher concentrations of extractable NH4+ and P, the upland and hyperseasonal forests studied here were richer in extractable NH4+ (upland and flooded) and P (upland) compared to other upland and hyperseasonal forests and woodlands. Given that the forests studied here shared nearly a third of the total tree species and had similar physiognomy, these results suggest that nutrient controls on cerrado structural diversity may be similar in upland and hyperseasonal cerrado.http://www.sciencedirect.com/science/article/pii/S2351989417302184CerradoHyperseasonal savannaNet mineralizationNutrient cyclingPantanal |
| spellingShingle | George L. Vourlitis Cloe S. Hentz Osvaldo Borges Pinto, Jr Edna Carneiro Jose de Souza Nogueira Soil N, P, and C dynamics of upland and seasonally flooded forests of the Brazilian Pantanal Global Ecology and Conservation Cerrado Hyperseasonal savanna Net mineralization Nutrient cycling Pantanal |
| title | Soil N, P, and C dynamics of upland and seasonally flooded forests of the Brazilian Pantanal |
| title_full | Soil N, P, and C dynamics of upland and seasonally flooded forests of the Brazilian Pantanal |
| title_fullStr | Soil N, P, and C dynamics of upland and seasonally flooded forests of the Brazilian Pantanal |
| title_full_unstemmed | Soil N, P, and C dynamics of upland and seasonally flooded forests of the Brazilian Pantanal |
| title_short | Soil N, P, and C dynamics of upland and seasonally flooded forests of the Brazilian Pantanal |
| title_sort | soil n p and c dynamics of upland and seasonally flooded forests of the brazilian pantanal |
| topic | Cerrado Hyperseasonal savanna Net mineralization Nutrient cycling Pantanal |
| url | http://www.sciencedirect.com/science/article/pii/S2351989417302184 |
| work_keys_str_mv | AT georgelvourlitis soilnpandcdynamicsofuplandandseasonallyfloodedforestsofthebrazilianpantanal AT cloeshentz soilnpandcdynamicsofuplandandseasonallyfloodedforestsofthebrazilianpantanal AT osvaldoborgespintojr soilnpandcdynamicsofuplandandseasonallyfloodedforestsofthebrazilianpantanal AT ednacarneiro soilnpandcdynamicsofuplandandseasonallyfloodedforestsofthebrazilianpantanal AT josedesouzanogueira soilnpandcdynamicsofuplandandseasonallyfloodedforestsofthebrazilianpantanal |