Doff Sotta, Eleneide

[["dc.bibliographiccitation.firstpage","601"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Global Change Biology"],["dc.bibliographiccitation.lastpage","617"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Sotta, E. D."],["dc.contributor.author","Meir, P."],["dc.contributor.author","Malhi, Y."],["dc.contributor.author","Nobre, A. D."],["dc.contributor.author","Hodnett, M."],["dc.contributor.author","Grace, J."],["dc.date.accessioned","2018-11-07T10:49:15Z"],["dc.date.available","2018-11-07T10:49:15Z"],["dc.date.issued","2004"],["dc.description.abstract","This study investigated the spatial and temporal variation in soil carbon dioxide (CO2) efflux and its relationship with soil temperature, soil moisture and rainfall in a forest near Manaus, Amazonas, Brazil. The mean rate of efflux was 6.45+/-0.25 SE mumol CO2 m(-2)s(-1) at 25.6+/-0.22 SEdegreesC (5 cm depth) ranging from 4.35 to 9.76 mumol CO2 m(-2)s(-1); diel changes in efflux were correlated with soil temperature (r(2)=0.60). However, the efflux response to the diel cycle in temperature was not always a clear exponential function. During period of low soil water content, temperature in deeper layers had a better relationship with CO2 efflux than with the temperature nearer the soil surface. Soil water content may limit CO2 production during the drying-down period that appeared to be an important factor controlling the efflux rate (r(2)=0.39). On the other hand, during the rewetting period microbial activity may be the main controlling factor, which may quickly induce very high rates of efflux. The CO2 flux chamber was adapted to mimic the effects of rainfall on soil CO2 efflux and the results showed that efflux rates reduced 30% immediately after a rainfall event. Measurements of the CO2 concentration gradient in the soil profile showed a buildup in the concentration of CO2 after rain on the top soil. This higher CO2 concentration developed shortly after rainfall when the soil pores in the upper layers were filled with water, which created a barrier for gas exchange between the soil and the atmosphere."],["dc.identifier.doi","10.1111/j.1529-8817.2003.00761.x"],["dc.identifier.isi","000221421600006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/48383"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Blackwell Publishing Ltd"],["dc.relation.issn","1354-1013"],["dc.title","Soil CO2 efflux in a tropical forest in the central Amazon"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","740"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Soil Biology and Biochemistry"],["dc.bibliographiccitation.lastpage","750"],["dc.bibliographiccitation.volume","40"],["dc.contributor.author","Sotta, Eleneide Doff"],["dc.contributor.author","Corre, Marife D."],["dc.contributor.author","Veldkamp, Edzo"],["dc.date.accessioned","2017-09-07T11:43:34Z"],["dc.date.available","2017-09-07T11:43:34Z"],["dc.date.issued","2007"],["dc.identifier.doi","10.1016/j.soilbio.2007.10.009"],["dc.identifier.gro","3150179"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6915"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.relation.issn","0038-0717"],["dc.title","Differing N status and N retention processes of soils under old-growth lowland forest in Eastern Amazonia, Caxiuanã, Brazil"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2218"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Global Change Biology"],["dc.bibliographiccitation.lastpage","2229"],["dc.bibliographiccitation.volume","13"],["dc.contributor.author","Sotta, Eleneide Doff"],["dc.contributor.author","Veldkamp, Edzo"],["dc.contributor.author","Schwendenmann, Luitgard"],["dc.contributor.author","Guimãres, Brenda Rocha"],["dc.contributor.author","Paixão, Rosiene Keila"],["dc.contributor.author","Ruivo, Maria de Lourdes P."],["dc.contributor.author","Lola da Costa, Antonio Carlos"],["dc.contributor.author","Meir, Patrick"],["dc.date.accessioned","2017-09-07T11:54:57Z"],["dc.date.available","2017-09-07T11:54:57Z"],["dc.date.issued","2007"],["dc.description.abstract","In the next few decades, climate of the Amazon basin is expected to change, as a result of deforestation and rising temperatures, which may lead to feedback mechanisms in carbon (C) cycling that are presently unknown. Here, we report how a throughfall exclusion (TFE) experiment affected soil carbon dioxide (CO2) production in a deeply weathered sandy Oxisol of Caxiuanã (Eastern Amazon). Over the course of 2 years, we measured soil CO2 efflux and soil CO2 concentrations, soil temperature and moisture in pits down to 3 m depth. Over a period of 2 years, TFE reduced on average soil CO2 efflux from 4.3±0.1 μmol CO2 m−2 s−1 (control) to 3.2±0.1 μmol CO2 m−2 s−1 (TFE). The contribution of the subsoil (below 0.5 m depth) to the total soil CO2 production was higher in the TFE plot (28%) compared with the control plot (17%), and it did not differ between years. We distinguished three phases of drying after the TFE was started. The first phase was characterized by a translocation of water uptake (and accompanying root activity) to deeper layers and not enough water stress to affect microbial activity and/or total root respiration. During the second phase a reduction in total soil CO2 efflux in the TFE plot was related to a reduction of soil and litter decomposers activity. The third phase of drying, characterized by a continuing decrease in soil CO2 production was dominated by a water stress-induced decrease in total root respiration. Our results contrast to results of a drought experiment on clay Oxisols, which may be related to differences in soil water retention characteristics and depth of rooting zone. These results show that large differences exist in drought sensitivity among Amazonian forest ecosystems, which primarily seem to be affected by the combined effects of texture (affecting water holding capacity) and depth of rooting zone."],["dc.identifier.doi","10.1111/j.1365-2486.2007.01416.x"],["dc.identifier.gro","3150157"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6890"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","1354-1013"],["dc.title","Effects of an induced drought on soil carbon dioxide (CO2) efflux and soil CO2 production in an Eastern Amazonian rainforest, Brazil"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","3307"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","BIOGEOSCIENCES"],["dc.bibliographiccitation.lastpage","3308"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Vicca, S."],["dc.contributor.author","Bahn, M."],["dc.contributor.author","Estiarte, M."],["dc.contributor.author","van Loon, E. E."],["dc.contributor.author","Vargas, R."],["dc.contributor.author","Alberti, G."],["dc.contributor.author","Ambus, P."],["dc.contributor.author","Arain, M. Altaf"],["dc.contributor.author","Beier, C."],["dc.contributor.author","Bentley, L. P."],["dc.contributor.author","Borken, W."],["dc.contributor.author","Buchmann, Nina"],["dc.contributor.author","Collins, Sally L."],["dc.contributor.author","de Dato, G."],["dc.contributor.author","Dukes, Jeffrey S."],["dc.contributor.author","Escolar, C."],["dc.contributor.author","Fay, P."],["dc.contributor.author","Guidolotti, G."],["dc.contributor.author","Hanson, P. J."],["dc.contributor.author","Kahmen, A."],["dc.contributor.author","Kroeel-Dulay, G."],["dc.contributor.author","Ladreiter-Knauss, T."],["dc.contributor.author","Larsen, Klaus Steenberg"],["dc.contributor.author","Lellei-Kovacs, E."],["dc.contributor.author","Lebrija-Trejos, E."],["dc.contributor.author","Maestre, F. T."],["dc.contributor.author","Marhan, Sven"],["dc.contributor.author","Marshall, M."],["dc.contributor.author","Meir, P."],["dc.contributor.author","Miao, Y."],["dc.contributor.author","Muhr, J."],["dc.contributor.author","Niklaus, P. A."],["dc.contributor.author","Ogaya, R."],["dc.contributor.author","Penuelas, Josep"],["dc.contributor.author","Poll, Christian"],["dc.contributor.author","Rustad, L. E."],["dc.contributor.author","Savage, K."],["dc.contributor.author","Schindlbacher, A."],["dc.contributor.author","Schmidt, Inger Kappel"],["dc.contributor.author","Smith, A. R."],["dc.contributor.author","Sotta, E. D."],["dc.contributor.author","Suseela, V."],["dc.contributor.author","Tietema, A."],["dc.contributor.author","van Gestel, N."],["dc.contributor.author","van Straaten, Oliver"],["dc.contributor.author","Wan, S."],["dc.contributor.author","Weber, U."],["dc.contributor.author","Janssens, Ivan A."],["dc.date.accessioned","2018-11-07T09:46:00Z"],["dc.date.available","2018-11-07T09:46:00Z"],["dc.date.issued","2014"],["dc.identifier.doi","10.5194/bg-11-3307-2014"],["dc.identifier.isi","000338761200014"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/34766"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Copernicus Gesellschaft Mbh"],["dc.relation.issn","1726-4189"],["dc.relation.issn","1726-4170"],["dc.title","Can current moisture responses predict soil CO2 efflux under altered precipitation regimes? A synthesis of manipulation experiments (vol 11, pg 2991, 2014)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","57"],["dc.bibliographiccitation.issue","1-3"],["dc.bibliographiccitation.journal","Forest Ecology and Management"],["dc.bibliographiccitation.lastpage","64"],["dc.bibliographiccitation.volume","237"],["dc.contributor.author","Sotta, E. D."],["dc.contributor.author","Veldkamp, Edzo"],["dc.contributor.author","Guimarães, B. R."],["dc.contributor.author","Paixão, R. K."],["dc.contributor.author","Ruivo, M. L. P."],["dc.contributor.author","Almeida, S. S."],["dc.date.accessioned","2017-09-07T11:54:54Z"],["dc.date.available","2017-09-07T11:54:54Z"],["dc.date.issued","2006"],["dc.description.abstract","Quantification of temporal and spatial variation of soil CO2 emissions is essential for an accurate interpretation of tower-based measurements of net ecosystem exchange. Here, we measured in the old-growth forest of Caxiuana, Eastern Amazonia soil CO2 efflux and its environmental controls from two Oxisol sites with contrasting soil texture and at different landscape positions. Average CO2 efflux was 21% higher for sand (3.93 ± 0.06 μmol CO2 m−2 s−1) than for the clay (3.08 ± 0.07 μmol CO2 m−2 s−1). No difference was detected for soil temperature between sites, while soil water content in sandy soil (23.2 ± 0.33%) was much lower than the clay soil (34.5 ± 0.98%), for the 2-year period. Soil CO2 efflux did not differ between dry and wet season, but we detected a significant interaction between season and topographic position. The variation caused by topography was in the same order of magnitude as temporal variation. Mean contribution of the litter layer to the CO2 efflux rates was 20% and varied from 25% during the wet season to close to 0% during the dry season. The relation between soil water content and soil CO2 efflux showed an optimum for both soil textures but the shape and optimum of the curves were different. The results of our study illustrate that soil moisture is an important driver of temporal variations in soil CO2 efflux in this old-growth forest. When extrapolating soil CO2 efflux to larger areas, the significant influences of soil texture, litter, and the interaction of topographical position and time illustrate that it is necessary to include some of the complexity of landscapes."],["dc.identifier.doi","10.1016/j.foreco.2006.09.027"],["dc.identifier.gro","3150142"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6873"],["dc.language.iso","en"],["dc.notes.status","public"],["dc.relation.issn","0378-1127"],["dc.subject","Amazon; Carbon cycle; CO2; Litter; NEE; Soil respiration; Soil temperature; Soil water content; Spatial variation; Topography"],["dc.title","Landscape and climatic controls on spatial and temporal variation in soil CO2 efflux in an Eastern Amazonian Rainforest, Caxiuanã, Brazil"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]