Impact of atmospheric CO2 and plant life forms on soil microbial activities

Pinay, Gilles; Barberá, Patricia; Carreras-Palou, Alba; Fromin, Nathalie; Sonié, Laurette; Couteaux, Marie Madeleine; Roy, Jacques; Philippot, Laurent; Lensi, R.

doi:10.1016/j.soilbio.2006.05.018

Cited by 30 publications

(25 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These enzyme concentrations (1) are functions of the in situ environmental constraints to which ammonia-oxidizers, nitrite-oxidizers and denitrifiers were exposed in the field prior to soil sampling (Pinay et al 2007, McGill et al 2010, Niboyet et al 2010, and (2) are measured in laboratory incubations under non-limiting substrate and optimal environmental conditions, over time periods where de novo synthesis of enzymes does not occur (Tiedje 1982). Measurements of potential rates thus reflect the direction and magnitude of the environmental constraints in the field on ammonia oxidation, nitrite oxidation and denitrification.…”

Section: Gross Rates Of N Mineralization N Immobilization and Nitrifmentioning

confidence: 99%

“…A similar ab- v www.esajournals.org sence of response of gross nitrification to added N despite greater potential nitrification was also found by Niboyet et al (2010), and suggests that ammonia-oxidizers were limited by environmental factors or by substrate availability at the time of measurements, so that greater abundance of ammonia-oxidizing enzymes at high N did not translate to greater gross nitrification (or that the 15 N pool dilution technique for measuring gross nitrification is insufficiently sensitive to meaningful variation captured by the potential measurements). Gross and potential nitrification could provide complementary information on nitrification response to global change: gross rates may provide insights into the response of nitrification to treatments at the time of soil sampling, i.e., over short-time periods since nitrification is known to be highly temporally variable (Corre et al 2002), while potential rates may provide insights into the response of the nitrifying microorganisms to the environmental constraints to which they were exposed prior to soil sampling-likely at the scale of weeks due to their slow growth rates (Pinay et al 2007, Niboyet et al 2010.…”

Section: Responses Of Soil N Cycling To Multiple Global Environmentalmentioning

confidence: 99%

“…However, the responses of gross N mineralization and N immobilization to elevated CO 2 greatly varied between studies, and the net effect of CO 2 -induced changes in the balance between N mineralization and N immobilization remains unclear (see reviews by Hungate 1999, Zak et al 2000b, de Graaf et al 2006, Hu et al 2006, Reich et al 2006. Gross and potential nitrification rates generally decreased in response to elevated CO 2 due to decreased ammonium availability for nitrifiers (Hungate et al 1997b, Niklaus et al 2001, Lagomarsino et al 2008, or remained unchanged (Zak et al 2000a, Barnard et al 2004, Pinay et al 2007). Finally, denitrification increased under elevated CO 2 as a result of higher soil labile C availability and soil moisture (Arnone and Bohlen 1998, Ineson et al 1998, Baggs et al 2003, or decreased due to reduced nitrate availability (Barnard et al 2005).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Testing interactive effects of global environmental changes on soil nitrogen cycling

et al. 2011

View full text Add to dashboard Cite

Abstract. Responses of soil nitrogen (N) cycling to simultaneous and potentially interacting global environmental changes are uncertain. Here, we investigated the combined effects of elevated CO 2 , warming, increased precipitation and enhanced N supply on soil N cycling in an annual grassland ecosystem as part of the Jasper Ridge Global Change Experiment (CA, USA). This field experiment included four treatments-CO 2 , temperature, precipitation, nitrogen-with two levels per treatment (ambient and elevated), and all their factorial combinations replicated six times. We collected soil samples after 7 and 8 years of treatments, and measured gross rates of N mineralization, N immobilization and nitrification, along with potential rates of ammonia oxidation, nitrite oxidation and denitrification. We also determined the main drivers of these microbial activities (soil ammonium and nitrate concentrations, soil moisture, soil temperature, soil pH, and soil CO 2 efflux, as an indicator of soil heterotrophic activity). We found that gross N mineralization responded to the interactive effects of the CO 2 , precipitation and N treatments: N addition increased gross N mineralization when CO 2 and precipitation were either both at ambient or both at elevated levels. However, we found limited evidence for interactions among elevated CO 2 , warming, increased precipitation, and enhanced N supply on the other N cycling processes examined: statistically significant interactions, when found, tended not to persist across multiple dates. Soil N cycling responded mainly to single-factor effects: long-term N addition increased gross N immobilization, potential ammonia oxidation and potential denitrification, while increased precipitation depressed potential nitrite oxidation and increased potential ammonia oxidation and potential denitrification. In contrast, elevated CO 2 and modest warming did not significantly affect any of these microbial N transformations. These findings suggest that global change effects on soil N cycling are primarily additive, and therefore generally predictable from single factor studies.

show abstract

Section: Gross Rates Of N Mineralization N Immobilization and Nitrifmentioning

confidence: 99%

Section: Responses Of Soil N Cycling To Multiple Global Environmentalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Testing interactive effects of global environmental changes on soil nitrogen cycling

et al. 2011

View full text Add to dashboard Cite

show abstract

“…Other studies have found that specific types of plants, such as annuals, and specific species, such as Typha latifolia, influence denitrification enzyme activity (Crush 1998;Hernandez and Mitsch 2007;Hume et al 2002;Lin et al 2002;Patra et al 2006;Pinay et al 2007). We hypothesize that plants are likely to influence denitrification mainly via their C inputs both in terms of C quantity and quality, both of which have been shown to limit denitrification (Groffman et al 1991;Groffman and Crawford 2003;Hernandez and Mitsch 2007;Hill 1996;Hill and Cardaci 2004;Schipper et al 1994).…”

Section: Linking Traits To Denitrification Potentialmentioning

confidence: 72%

“…Some studies have found plant traits are key determinants of soil ecosystem properties and processes such as total N and microbial biomass and activity (Bardgett et al 1999;Wardle et al 1998). Additionally, many studies have found plant species effects on several microbiallydriven soil processes such as N mineralization, nitrification, CH 4 and CO 2 release (Hobbie 1992;Knops et al 2002;Steltzer and Bowman 1998;Sutton-Grier and Megonigal 2011;Verville et al 1998;Wedin and Tilman 1990) as well as denitrification (Hernandez and Mitsch 2007;Hume et al 2002;Lin et al 2002;Patra et al 2006;Pinay et al 2007). These plant-induced changes are mainly due to differences in the quality of plant inputs to soils, which is determined by the ecological strategies and the associated suite of traits of the dominant species (Wardle 2002).…”

Section: Discussionmentioning

confidence: 99%

Different plant traits affect two pathways of riparian nitrogen removal in a restored freshwater wetland

2012

View full text Add to dashboard Cite

Background & aims Plants may have dissimilar effects on ecosystem processes because they possess different attributes. Given increasing biodiversity losses, it is important to understand which plant traits are key drivers of ecosystem functions. To address this question, we studied the response of two ecosystem functions that remove nitrogen (N) from wetland soils, the accumulation of N in plant biomass and denitrification potential (DNP), to variation in plant trait composition. Methods Our experiment manipulated plant composition in a riparian wetland. We determined relative importance of plant traits and environmental variables as predictors of each ecosystem function. Results We demonstrate that Water Use Efficiency (WUE) had a strong negative effect on biomass N. Root porosity and belowground biomass were negatively correlated with DNP. Trait ordination indicated that WUE was largely orthogonal to traits that maximized DNP. Conclusions These results indicate that plant species with different trait values are required to maintain multiple ecosystem functions, and provide a more mechanistic, trait-based link between the recent findings that higher biodiversity is necessary for multi-functionality. While we selected plant traits based on ecological theory, several of the plant traits were not good predictors of each ecosystem function suggesting the ecological theory linking traits to function is incomplete and requires strengthening. Keywords

show abstract

Impact of seasonal sediment desiccation and rewetting on microbial processes involved in greenhouse gas emissions

Fromin¹,

Pinay²,

Montuelle³

et al. 2010

Ecohydrology

View full text Add to dashboard Cite

The response to spring desiccation and autumn (rainfall-related) rewetting of sediment microbial functioning was investigated in a Mediterranean seasonal pond. Surface (0-2 cm depth) and subsurface (2-10 cm) sediments were sampled during the pond emptying, the dry period, and after a rain event, and characterized for potential microbial activities [substrate-induced respiration (SIR), denitrification enzyme activity (DEA), and nitrification enzyme activity (NEA)]. Eddy covariance fluxes of CO 2 were also measured as an integrated value of the respiration of the sediment. Our results showed that short-term variations in the sediment water content can strongly affect the microbial functioning, whereas the metabolic structure of the microbial community was not strongly modified. The duration of the dry period influenced the intensity of microbial potentials and the surface layer responded differently from the subsurface layer, which was less affected by variations in water content. SIR and DEA were strongly stimulated during early summer desiccation of the sediment, while NEA was stimulated during late desiccation period. DEA and NEA potentials remained very high in sediment after 1 month of drought. Eddy covariance measurements confirmed that global CO 2 fluxes were enhanced during early desiccation, decreased under dry conditions, and finally re-enhanced after a rainfall. These results suggest that management of such ponds can influence CO 2 and N 2 O emissions, and that some precautions in the management (limitation of dry-wet alternations and duration of emptying) could help reduce greenhouse gas emissions.

show abstract

Impact of atmospheric CO2 and plant life forms on soil microbial activities

Cited by 30 publications

References 31 publications

Testing interactive effects of global environmental changes on soil nitrogen cycling

Testing interactive effects of global environmental changes on soil nitrogen cycling

Different plant traits affect two pathways of riparian nitrogen removal in a restored freshwater wetland

Impact of seasonal sediment desiccation and rewetting on microbial processes involved in greenhouse gas emissions

Contact Info

Product

Resources

About