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... Leaf litter and other organic resources returned to the soil are important regulators of ecological processes in forest ecosystems, and their ecological impacts may be strongly influenced both by their quality and by interactions between coexisting resource types. To date, most studies on effects of resource identity and mixing have only involved leaf litter, despite the fact that other resource t ...
European Union; Juniperus communis; bedrock; cattle; conservation areas; grazing; habitats; land use; landscapes; limestone soils; monitoring; pastures; plant communities; shrublands; Sweden
Abstract:
...
Alvars are habitats characterised by thin soils on limestone bedrock. The largest alvar area in the world is the Stora Alvaret, Öland (25,500 hectares), which is characterised by the presence of several plant communities of high conservation value. Emigration at the end of the nineteenth century reduced land-use intensity resulting in scrub encroachment, mainly by Juniperus communis L. T ...
Nitrosomonadaceae; agricultural soils; topsoil; arable soils; organic compounds; organic fertilizers; organic wastes; soil amendments; soil bacteria; community structure; polymerase chain reaction; sequence analysis; phylogeny; denaturing gradient gel electrophoresis; Sweden
Abstract:
... The impact of organic compounds present in different kinds of organic fertilizers, i.e., anaerobically digested household waste, composted organic household waste, swine manure, and cow manure, on microbial communities in arable soil was investigated using microcosms. Soil was amended with dried residues or organic extracts of the residues and incubated for 12 weeks at 25°C. The microbial communit ...
... An assessment of nutrient sustainability has been done for stands of European beech, Sycamore maple, European oak, Norway spruce, Larch, Grandis fir and Douglas fir at Björnstorp Estate in southern Sweden. To estimate the nutrient sustainability, mass balance was calculated with respect to Ca, Mg, K, N and P. The release from mineral weathering was calculated using the PROFILE model. The leaching ...
... A basic idea of plant defences is that a plant should gain protection from its own defence. In addition, there is evidence that defence traits of the neighbouring plants can influence the degree of protection of an individual plant. These associational effects depend in part on the spatial scale of herbivore selectivity. A strong between-patch selectivity together with a weak within-patch selectiv ...
dogs; autosomes; dominant genes; mutation; dog diseases; dog breeds; genetic disorders; respiratory tract diseases; inheritance (genetics); congenital abnormalities; prevalence; animal genetics; Sweden
Abstract:
... To define the mode of inheritance of the dorsal ridge and investigate if the ridge predisposes to the congenital abnormality dermoid sinus in the Rhodesian ridgeback. Segregation analysis was performed, including 87 litters (n=803) produced in Sweden between 1981 and 2002. Data were corrected to avoid bias in the segregation ratio. Chi-squared analysis was performed including 402 litters (n=3598) ...
correlation; inorganic phosphorus; bacterioplankton; lakes; glucose; microbial growth; dissolved organic carbon; nutrient use efficiency; bacteria; Sweden
Abstract:
... We carried out enclosure experiments in an unproductive lake in northern Sweden and studied the effects of enrichment with different dissolved organic carbon (glucose)/inorganic phosphorous (DOC/Pi) ratios on bacterioplankton production (BP), growth efficiency (BGE), nutrient use efficiency (BNUE), growth rate, and specific respiration. We found considerable variation in BP, BGE, and BNUE along th ...
tree growth; inflorescences; hybrids; flowering; regulator genes; phenology; seasonal growth; Populus trichocarpa; latitude; provenance; Populus tremuloides; Populus tremula; gene expression regulation; photoperiod; photoperiodism; Germany; Sweden
Abstract:
... Forest trees display a perennial growth behavior characterized by a multiple-year delay in flowering and, in temperate regions, an annual cycling between growth and dormancy. We show here that the CO/FT regulatory module, which controls flowering time in response to variations in daylength in annual plants, controls flowering in aspen trees. Unexpectedly, however, it also controls the short-day-in ...
... Quantitative estimates of cadmium (Cd), copper (Cu) and zinc (Zn) flows in percolating soil water and in surface run-off on arable land are rather scarce. Such information is essential for establishing reliable mass balances of trace metals, e.g. on field level, due to the fact that the trace metal outputs in water are quantitatively significant in field balance calculations. The aim of this study ...