Contribution à l’étude des leptospiroses bovines inapparentes en charollais

Chevrier L., Gaumont R. Contribution à l’étude des leptospiroses bovines inapparentes en Charollais. In: Bulletin de l'Académie Vétérinaire de France tome 127 n°4, 1974. pp. 213-219

La réaction d’hémagglutination (Réaction de Middlebrook-Dubos ) dans la paratuberculose bovine (Entérite chronique hypertrophiante, maladie de Johne)

Gernez-Rieux Charles, Tacquet Albert, Gaumont R., Verge Jean, Cauchy Laurent. La réaction d'hémagglutination (Réaction de Middlebrook-Dubos) dans la paratuberculose bovine (Entérite chronique hypertrophiante, maladie de Johne). In: Bulletin de l'Académie Vétérinaire de France tome 103 n°9, 1950. pp. 465-468

Looking deeper into the soil : biophysical controls and seasonal lags of soil CO2 production and efflux

Author Posting. © Ecological Society of America, 2010. This article is posted here by permission of Ecological Society of America for personal use, not for redistribution. The definitive version was published in Ecological Applications 20 (2010): 1569–1582, doi:10.1890/09-0693.1.We seek to understand how biophysical factors such as soil temperature (Ts), soil moisture (θ), and gross primary production (GPP) influence CO2 fluxes across terrestrial ecosystems. Recent advancements in automated measurements and remote-sensing approaches have provided time series in which lags and relationships among variables can be explored. The purpose of this study is to present new applications of continuous measurements of soil CO2 efflux (F0) and soil CO2 concentrations measurements. Here we explore how variation in Ts, θ, and GPP (derived from NASA's moderate-resolution imaging spectroradiometer [MODIS]) influence F0 and soil CO2 production (Ps). We focused on seasonal variation and used continuous measurements at a daily timescale across four vegetation types at 13 study sites to quantify: (1) differences in seasonal lags between soil CO2 fluxes and Ts, θ, and GPP and (2) interactions and relationships between CO2 fluxes with Ts, θ, and GPP. Mean annual Ts did not explain annual F0 and Ps among vegetation types, but GPP explained 73% and 30% of the variation, respectively. We found evidence that lags between soil CO2 fluxes and Ts or GPP provide insights into the role of plant phenology and information relevant about possible timing of controls of autotrophic and heterotrophic processes. The influences of biophysical factors that regulate daily F0 and Ps are different among vegetation types, but GPP is a dominant variable for explaining soil CO2 fluxes. The emergence of long-term automated soil CO2 flux measurement networks provides a unique opportunity for extended investigations into F0 and Ps processes in the near future.Data collection was possible thanks to NASA, the NSF Center for Embedded Networked Sensing (CCR-0120778), DOE (DE-FG02-03ER63638), CONACyT, UCMEXUS, NSF (EF-0410408), NSF-LTER, KAKENHI (12878089 and 13480150), the Academy of Finland (213093), the Austrian Science Fund (FWF, P18756-B16), the Kearney Foundation, the Canadian Foundation for Climate and Atmospheric Sciences (CFCAS), and the Natural Science and Engineering Research Council of Canada (NSERC). R. Vargas was supported by grant DEB-0639235 during the preparation of this manuscript

Soil Respiration in Relation to Photosynthesis of Quercus mongolica Trees at Elevated CO2

Knowledge of soil respiration and photosynthesis under elevated CO2 is crucial for exactly understanding and predicting the carbon balance in forest ecosystems in a rapid CO2-enriched world. Quercus mongolica Fischer ex Ledebour seedlings were planted in open-top chambers exposed to elevated CO2 (EC = 500 µmol mol−1) and ambient CO2 (AC = 370 µmol mol−1) from 2005 to 2008. Daily, seasonal and inter-annual variations in soil respiration and photosynthetic assimilation were measured during 2007 and 2008 growing seasons. EC significantly stimulated the daytime soil respiration by 24.5% (322.4 at EC vs. 259.0 mg CO2 m−2 hr−1 at AC) in 2007 and 21.0% (281.2 at EC vs. 232.6 mg CO2 m−2 hr−1 at AC) in 2008, and increased the daytime CO2 assimilation by 28.8% (624.1 at EC vs. 484.6 mg CO2 m−2 hr−1 at AC) across the two growing seasons. The temporal variation in soil respiration was positively correlated with the aboveground photosynthesis, soil temperature, and soil water content at both EC and AC. EC did not affect the temperature sensitivity of soil respiration. The increased daytime soil respiration at EC resulted mainly from the increased aboveground photosynthesis. The present study indicates that increases in CO2 fixation of plants in a CO2-rich world will rapidly return to the atmosphere by increased soil respiration

Sur un Lachnide du rosier peu étudié, appartenant à un genre nouveau Maculolachnus rosae (Cholodk.). [Hem. Aphididae]

Gaumont L. Sur un Lachnide du rosier peu étudié, appartenant à un genre nouveau Maculolachnus rosae (Cholodk.). [Hem. Aphididae]. In: Bulletin de la Société entomologique de France, volume 25 (2),1920. pp. 26-31

Deux Pemphigella nouveaux de l'Afrique du Nord [Hem. Aphidae]

Gaumont L. Deux Pemphigella nouveaux de l'Afrique du Nord [Hem. Aphidae]. In: Bulletin de la Société entomologique de France, volume 35 (18),1930. pp. 278-283

Deux Pemphigella nouveaux de l'Afrique du Nord [Hem. Aphidae]

Gaumont L. Deux Pemphigella nouveaux de l'Afrique du Nord [Hem. Aphidae]. In: Bulletin de la Société entomologique de France, volume 35 (18),1930. pp. 278-283

Sur un Ephedrus [Hym. Braconidae] parasite de Macrosiphoniella Sanborni Gilette [Hem. Aphidae]

Gautier Claude, Bonnamour Stéphane, Gaumont L. Sur un Ephedrus [Hym. Braconidae] parasite de Macrosiphoniella Sanborni Gilette [Hem. Aphidae] . In: Bulletin de la Société entomologique de France, volume 34 (12),1929. pp. 200-201

Observations biologiques sur Aphidius cardui Marsh. [Hym. Braconidae]

Gautier Claude, Bonnamour Stéphane, Gaumont L. Observations biologiques sur Aphidius cardui Marsh. [Hym. Braconidae]. In: Bulletin de la Société entomologique de France, volume 31 (15),1926. p. 162