Search results for "Life on Land"
showing 10 items of 1478 documents
Monitoring soil volume wetness in heterogeneous soils by electrical resistivity. A field-based pedotransfer function.: A field-based pedotransfer fun…
2014
11 pages; International audience; Modern irrigation techniques require accurate, rapid, cost-effective, spatial measurement of soil moisture. Electrical Resistivity Tomography (ERT) meets most of these requirements, but needs to be calibrated for each use because it is very sensitive to differences in soil characteristics. In this study, a pedotransfer function approach is used to remove the need for site-specific calibration, allowing ERT to be used directly to measure soil moisture. The study site was a hillslope vineyard, where eight calcaric-cambisol soil profiles were identified. From 2012 to 2013, 23 000 soil volume wetness measurements were acquired by Time Domain Reflectometry, and …
Supplementary_material_2 – Supplemental material for Integrating fire-scar, charcoal and fungal spore data to study fire events in the boreal forest …
2019
Supplemental material, Supplementary_material_2 for Integrating fire-scar, charcoal and fungal spore data to study fire events in the boreal forest of northern Europe by Normunds Stivrins, Tuomas Aakala, Liisa Ilvonen, Leena Pasanen, Timo Kuuluvainen, Harri Vasander, Mariusz Gałka, Helena R Disbrey, Janis Liepins, Lasse Holmström and Heikki Seppä in The Holocene
Supplementary_material_1 – Supplemental material for Integrating fire-scar, charcoal and fungal spore data to study fire events in the boreal forest …
2019
Supplemental material, Supplementary_material_1 for Integrating fire-scar, charcoal and fungal spore data to study fire events in the boreal forest of northern Europe by Normunds Stivrins, Tuomas Aakala, Liisa Ilvonen, Leena Pasanen, Timo Kuuluvainen, Harri Vasander, Mariusz Gałka, Helena R Disbrey, Janis Liepins, Lasse Holmström and Heikki Seppä in The Holocene
Supplementary_material_2 – Supplemental material for Integrating fire-scar, charcoal and fungal spore data to study fire events in the boreal forest …
2019
Supplemental material, Supplementary_material_2 for Integrating fire-scar, charcoal and fungal spore data to study fire events in the boreal forest of northern Europe by Normunds Stivrins, Tuomas Aakala, Liisa Ilvonen, Leena Pasanen, Timo Kuuluvainen, Harri Vasander, Mariusz Gałka, Helena R Disbrey, Janis Liepins, Lasse Holmström and Heikki Seppä in The Holocene
Supplementary_material_1 – Supplemental material for Integrating fire-scar, charcoal and fungal spore data to study fire events in the boreal forest …
2019
Supplemental material, Supplementary_material_1 for Integrating fire-scar, charcoal and fungal spore data to study fire events in the boreal forest of northern Europe by Normunds Stivrins, Tuomas Aakala, Liisa Ilvonen, Leena Pasanen, Timo Kuuluvainen, Harri Vasander, Mariusz Gałka, Helena R Disbrey, Janis Liepins, Lasse Holmström and Heikki Seppä in The Holocene
Tackling Market Failure or Building a Cartel? Creation of an Investment Regulation System in Finnish Forest Industries
2015
Government intervention in the economy is often justified by the need to correct market failures. This study analyzes one case, the investments of Finnish forest industries, in which, in the late 1960s and early 1970s, both policy makers and the trade association representing the sector reasoned that intervention was particularly necessary because otherwise, the only substantial natural resource in the small country would be overexploited. In the long run, however, the growth of forest resources turned out to be higher, and the demand for wood lower, than expected. Furthermore, the most influential industrialists managed to “capture” the regulatory system and make it a component of their ne…
Response of soil bacterial community structure to successive perturbations of different types and intensities
2008
SummaryIn soil, genetic structure modifications of indigenousbacterial community consecutively to a severe stress(mercury contamination) were delayed when thecommunity was pre-exposed to various minor per-turbations (heat, copper and atrazine). Such minorperturbations induced transitory community struc-ture modifications leading to an increase of commu-nity stability towards a severe mercury stress. Theseresults illustrated well the short-term pre-adaptationprocess for bacterial community hypothesizing thatcommunity submitted to perturbations become moreresistant to withstand another stress. Compared with other environmental matrices of the bio-sphere, soils are considered as the main reservo…
Effect of primary mild stresses on resilience and resistance of the nitrate reducer community to a subsequent severe stress
2008
International audience; The factors regulating soil microbial stability (e.g. resistance and resilience) are poorly understood, even though microorganisms are essential for ecosystem functioning. In this study, we tested whether a functional microbial community subjected to different primary mild stresses was equally resistant or resilient to a subsequent severe stress. The nitrate reducers were selected as model community and analysed in terms of nitrate reduction rates and genetic structure by narG PCR-restriction fragment length polymorphism fingerprinting. Heat, copper and atrazine were used as primary stresses and mercury at a high concentration as a severe stress. None of the primary …
Flux heterogeneity and evapotranspiration partitioning in a sparse canopy: the fallow savanna
1997
Abstract This paper focuses on in situ measurements obtained during the intensive observation period of the HAPEX-Sahel experiment. Micrometeorological measurements and trunk sap flow monitoring were combined to analyse transfer characteristics of a fallow savanna site within the East Central Supersite. Results show that the shrub canopy heterogeneity induces a large spatial variability of solar irradiance, soil heat flux and sensible and latent heat fluxes at the grassland level. This variability is induced by both a “shade effect” and a “wake effect”. Both shrubs and grassland provide sources of vapour, but the partitioning of evapotranspiration between these two components varies conside…
The need for harmonizing methodologies for assessing soil threats in Europe
2010
Central to the EU thematic strategy for soil protection is that areas affected by soil degradation through erosion, soil organic matter (SOM) decline, compaction, salinization and landslides should be identified in a clear and consistent way. However, the current methodologies to achieve this often differ and this can result in different perceptions of risks amongst EU Member States. The aims of this paper are to: (i) assess the current status of assessment methodologies in Europe (EU27) associated with erosion, SOM decline, compaction, salinization and landslides and (ii) discuss the issues associated with harmonization of these methodologies throughout the EU27. The need for harmonization…