The ‘killer shrimp’ Dikerogammarus villosus (Crustacea,Amphipoda) invading Alpine lakes: overland transport by recreational boats and scuba‐diving gear as potential entry vectors?     

Karolina Bacela‐Spychalska  Michal Grabowski  Tomasz Rewicz  Alicja Konopacka  Remi Wattier 《水产资源保护:海洋与淡水生态系统》2013,23(4):606-618

Differences in metabolomic profiles of the naturally contaminated grain of barley,oats and rye     

Juliusz Perkowski  Kinga Stuper  Maciej Buśko  Tomasz Góral  Anna Kaczmarek  Henryk Jeleń 《Journal of Cereal Science》2012

Studies of a spectrum of metabolites found in cereals are becoming one of the primary tools for evaluating their susceptibility to the effects of various environmental agents, such as: pathogens, temperature and precipitation. In order to reduce the effect of the environmental conditions, cultivars were grown under identical cultivation conditions.  相似文献   

Wild boar populations up,numbers of hunters down? A review of trends and implications for Europe          下载免费PDF全文

Giovanna Massei  Jonas Kindberg  Alain Licoppe  Dragan Gačić  Nikica Šprem  Jiří Kamler  Eric Baubet  Ulf Hohmann  Andrea Monaco  Janis Ozoliņš  Sandra Cellina  Tomasz Podgórski  Carlos Fonseca  Nickolay Markov  Boštjan Pokorny  Carme Rosell  András Náhlik 《Pest management science》2015,71(4):492-500

Across Europe, wild boar numbers increased in the 1960s–1970s but stabilised in the 1980s; recent evidence suggests that the numbers and impact of wild boar has grown steadily since the 1980s. As hunting is the main cause of mortality for this species, we reviewed wild boar hunting bags and hunter population trends in 18 European countries from 1982 to 2012. Hunting statistics and numbers of hunters were used as indicators of animal numbers and hunting pressure. The results confirmed that wild boar increased consistently throughout Europe, while the number of hunters remained relatively stable or declined in most countries. We conclude that recreational hunting is insufficient to limit wild boar population growth and that the relative impact of hunting on wild boar mortality had decreased. Other factors, such as mild winters, reforestation, intensification of crop production, supplementary feeding and compensatory population responses of wild boar to hunting pressure might also explain population growth. As populations continue to grow, more human–wild boar conflicts are expected unless this trend is reversed. New interdisciplinary approaches are urgently required to mitigate human–wild boar conflicts, which are otherwise destined to grow further. © 2014 Crown copyright. Pest Management Science © 2014 Society of Chemical Industry  相似文献   

Lactones 46. Synthesis,antifeedant and antibacterial activity of γ‐lactones with a p‐methoxyphenyl substituent          下载免费PDF全文

Marcelina Mazur  Andrzej Skrobiszewski  Witold Gładkowski  Magdalena Podkowik  Jacek Bania  Jan Nawrot  Tomasz Klejdysz  Czesław Wawrzeńczyk 《Pest management science》2016,72(3):489-496

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Vipera berus Bites in the Region of Southwest Poland—A Clinical Analysis of 26 Cases     

Jan Magdalan  Małgorzata Trocha  Anna Merwid-Ląd  Tomasz Sozański  Marcin Zawadzki 《The Forestry Chronicle》2010,21(2):114-119

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Regeneration of Populus nine years after variable retention harvest in boreal mixedwood forests     

Tomasz Gradowski  Victor J. Lieffers  Simon M. Landhäusser  Derek Sidders  Jan Volney  John R. Spence 《Forest Ecology and Management》2010

Aspen and balsam poplar regeneration from root suckers were assessed in boreal mixedwood forests nine years after logging in a variable retention experiment (EMEND Project—Ecosystem Management Emulating Natural Disturbance) located north of Peace River, Alberta, Canada. Five levels of retention of mature trees (2%, 10%, 20%, 50% or 75% of the original basal area) were applied in stands dominated by aspen, white spruce or mixtures of the two species. Basal area of aspen (or that of aspen plus balsam poplar combined) prior to logging strongly influenced sucker density of aspen (or aspen + balsam poplar combined) and in some cases their growth. Nine years after harvest there was a decline in sucker density and volume ha⁻¹ with increasing retention levels of aspen (or both poplars combined); sucker density declined by 50% when only 20% of the original basal area was left in the stand. Retaining mature spruce trees in the stand had little influence on the number of suckers but did affect their total volume ha⁻¹. Thus, we suggest that by knowing stand aspen and balsam poplar density prior to logging and varying levels of retention of aspen and balsam poplar or conifers at harvest, the density of Populus regeneration can be predicted by managers, thereby allowing them to create a range of mixedwood conditions.  相似文献   

Cytopathology of canine lymphomas (100 cases)     

Sapierzyński R  Micuń J  Jagielski D  Jurka P 《Polish journal of veterinary sciences》2010,13(4):653-659

Malignant lymphoma is one of the most common malignant tumours occurring in dogs. Fine needle aspiration biopsy (FNAB) is an excellent, specific diagnostic procedure used to assess pathological processes in lymph nodes. The aim of the present study was to conduct a cytopathological analysis of lymphoma in dogs and to analyse some epidemic aspects of occurrence of lymphoma in 100 dogs using Giemsa stained slides. Samples were obtained by fine needle aspiration biopsy, fine needle non-aspiration biopsy, lymph node impression smears and by examination of body cavity effusions. The determination of the type and subtype of tumour was made on the basis of the updated Kiel classification adopted for dogs. Based on cytopathological analysis, the lymphoma was diagnosed in 100 dogs: 44 were female and 56 male. The animals' age ranged from 1.5 year to 15 years (median: 7.5 years), the animals were of different breeds (72% of all dogs belonged to 28 different breeds) and crossbreeds (28%). In 29% of dogs the regional or general lymphadenomegaly was the only clinical sign observed, in remaining cases (71%) at least one abnormality connected to lymphoma was found. Among all diagnosed lymphomas, high-grade lymphomas were more prevalent (86% of all cases) than low-grade lymphomas (14% of all cases). The possibility of boxers having a predisposition to T cell lymphoma development could be also suspected.  相似文献   

The Impact of Diesel Oil Pollution on the Hydrophobicity and CO<Subscript>2</Subscript> Efflux of Forest Soils     

Edyta Hewelke  Jan Szatyłowicz  Piotr Hewelke  Tomasz Gnatowski  Rufat Aghalarov 《Water, air, and soil pollution》2018,229(2):51

The contamination of soil with petroleum products is a major environmental problem. Petroleum products are common soil contaminants as a result of human activities, and they are causing substantial changes in the biological (particularly microbiological) processes, chemical composition, structure and physical properties of soil. The main objective of this study was to assess the impact of soil moisture on CO₂ efflux from diesel-contaminated albic podzol soils. Two contamination treatments (3000 and 9000 mg of diesel oil per kg of soil) were prepared for four horizons from two forest study sites with different initial levels of soil water repellency. CO₂ emissions were measured using a portable infrared gas analyser (LCpro+, ADC BioScientific, UK) while the soil samples were drying under laboratory conditions (from saturation to air-dry). The assessment of soil water repellency was performed using the water drop penetration time test. An analysis of variance (ANVOA) was conducted for the CO₂ efflux data. The obtained results show that CO₂ efflux from diesel-contaminated soils is higher than efflux from uncontaminated soils. The initially water-repellent soils were found to have a bigger CO₂ efflux. The non-linear relationship between soil moisture content and CO₂ efflux only existed for the upper soil horizons, while for deeper soil horizons, the efflux is practically independent of soil moisture content. The contamination of soil by diesel leads to increased soil water repellency.  相似文献   

The animal‐dependent risk factors in canine T‐cell lymphomas          下载免费PDF全文

U. Jankowska  D. Jagielski  M. Czopowicz  R. Sapierzyński 《Veterinary and comparative oncology》2017,15(2):307-314

Malignant lymphomas are one of the most common malignancies occurring in dogs; among them T‐cell tumours are less commonly recognized. Recently, many authors have recommended cytology as a sufficient diagnostic method for canine lymphomas, especially if supported by immunocytochemistry or flow cytometry. The aim of the study was to characterize animal‐dependent risk factors in canine T‐cell lymphomas (TCLs) in Poland, including specific cytological subtypes. Determination of the type and subtype of the tumour was made based on the updated Kiel cytological classification adopted for dogs as previously described. Two breeds turned out predisposed to TCL (dog de Bordeaux and Boxer) while no predisposition to B‐cell lymphoma could be evidenced. Dogs with low‐grade lymphoma were significantly older than those with high‐grade lymphoma.  相似文献   

Effect of mulch and tillage system on soil porosity under wheat (Triticum aestivum)     

Tomasz G&#x;&#x;b  Bogdan Kulig 《Soil & Tillage Research》2008,99(2):169-178

Crop residues and reduced tillage become current tendency in modifying tillage due to better water management, organic and nutrient supply and increasing crop production. This study was carried out to quantify the effect of fodder radish mulching and different tillage systems in wheat production. In 2004–2006 the field trial was set up on Luvic Chernozems derived from loess. This experiment consisted of two factors: tillage system (conventional or reduced) and mulch (with or without). The air–water properties of soil with particular focus on macropore characteristics were investigated.The tillage system and mulch application significantly influenced physical properties of investigated soil. Reduced tillage, without mouldboard plough, increased the soil density with respect to conventional tillage. However, in the upper soil layer (0–10 cm) with mulch residues the bulk density decreased and reached the similar value as those obtained at conventional tillage (1.25 g cm⁻³). The macroporosity of soil with conventional tillage (14.79%) was significantly higher in comparison with reduced tillage (6.55%). The mulch of fodder radish added at reduced tillage increased the macroporosity in pore diameter range of 50–500 μm. These changes referred to all shape classes: regular, irregular and elongated pores. The lowest transmission pores content (0.078 cm³ cm⁻³) was noticed at the reduced tillage without mulch at the 0–10 cm layer. Due to lack of differences in storage pores the tillage and mulching had no effect on both AWC (available water content) and PWC (productive water content) values. The higher value of AWC was noticed in the upper soil layer (0.198 cm³ cm⁻³ in average), whereas in the 10–20 cm soil layer it was 0.186 cm³ cm⁻³. Similar relation was recorded in PWC values, 0.165 and 0.154 cm³ cm⁻³, respectively. The results obtained in physical properties of soil reflected in wheat yields. The yields obtained at reduced tillage system without mulch (5.54 t ha⁻¹) were significant lower with respect to treatment when mulch applied (6.79 t ha⁻¹). The mulch residues did not affect yields at conventional tillage (6.53 t ha⁻¹ without mulch and 7.00 t ha⁻¹ with mulch). The main conclusion is that the mulching can help to avoid yield reduction in wheat production when reduced tillage is used.  相似文献