Abstract Wildfires affect different physical, chemical, and hydraulic soil properties, the magnitude of their effects varies depending on intrinsic properties wildfire characteristics. The objectives this study are: to estimate impact heating temperature (50–900°C) sandy (Arenosol) taken in 1) coniferous forests (Scots pine Pinus sylvestris ) ages (30 100 years); 2) deciduous (alder Alnus gluti...

Alder (Alnus glutinosa) and more than 200 angiosperms that encompass 24 genera are collectively called actinorhizal plants. These plants form a symbiotic relationship with the nitrogen-fixing actinomycete Frankia strain HFPArI3. The plants provide the bacteria with carbon sources in exchange for fixed nitrogen, but this metabolite exchange in actinorhizal nodules has not been well defined. We i...

Elevated atmospheric CO2 can change foliar tissue chemistry. This alters leaf litter palatability to macroinvertebrate detritivores with consequences for decomposition, nutrient turnover, and food-web structure. Currently there is no consensus on the link between CO2 enrichment, litter chemistry, and macroinvertebrate-mediated leaf decomposition. To identify any unifying mechanisms, we presente...

Plant litter breakdown is a key ecological process in terrestrial and freshwater ecosystems. Streams and rivers, in particular, contribute substantially to global carbon fluxes. However, there is little information available on the relative roles of different drivers of plant litter breakdown in fresh waters, particularly at large scales. We present a global-scale study of litter breakdown in s...

Description: Three experiments were conducted to investigate the effect of paclobutrazol on shoot and cambial growth of nine tree species located in Indiana and Louisiana, U.S. In Experiment I, white oak (Quercus alba L.) and red oak (Q. rubra L.) in Indiana were treated in April 1995 with paclobutrazol using the soil drench method. In Experiment II, paclobutrazol was applied in April 1996, usi...

8 Group 1.1c Crenarchaeota are the predominating archaeal group in acidic boreal forest soils. In this 9 study we show that the detection frequency of 1.1c crenarchaeotal 16S rRNA genes increased in the 10 rhizospheres of the boreal forest trees following colonisation by the ectomycorrhizal fungus Paxillus 11 involutus. This effect was very clear in the fine roots of Pinus sylvestris, Picea abi...