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Mercury content has been determined separately in the caps, stalks and whole fruiting bodies of thirteen species of popular wild edible mushrooms of the genus Boletus, Xerocomus, Leccinum, Suillus, Tricholoma, Rozites, Sarcodon and Cantharellus collected from Augustowska Forest, which is located in an unpolluted region in the northeastern part of Poland. The mushroom samples were collected in the summer and autumn of 1997 and 1998. Mercury measurements were by cold-vapour atomic absorption spectroscopy (CV-AAS) after wet digestion of the samples with concentrated nitric acid in closed PTFE vessels in a microwave oven. For each species 16 pooled samples were examined. Pinewood King Bolete Boletus pinophilus, King Bolete Boletus edulis, Scaly Tooth Sarcodon imbricatus, Gypsy Rozites caperatus, and Orange Birch Bolete Leccinum versipelle were the most contaminated with mean concentrations of 2,000 ± 800; 2,300 ± 1,100; 2,300 ± 500; 1,200 ± 300 and 720 ± 380 in the caps and of 850 ± 390; 1,000 ± 500; 1,100 ± 400; 470 ± 150 and 420+ 170 ng/g dry matter in the stalks, respectively. For the other mushroom species examined the mean mercury concentration were < 260 ± 80 ng/g in the caps and < 170 ± 40 ng/g in the stalks, while the fruiting bodies of Common Cantharelle Cantharellus cibarius were the least contaminated, i.e. the range was between 8.0 and 24 ng/g and the mean 14 ± 4. These findings suggest that mushrooms from Augustowska Forest indicate background contamination by mercury. Nevertheless, some of the mushroom species may posses a specific health risk when frequently consumed due to elevated mercury concentrations.
We assessed the assemblages of birds inhabiting pine-dominated managed forest, aged between 1–5 years and above 140 years. Birds were counted on study plots representing eight different phases to the forest's development, with nesting, foraging and migratory guild categories recognised. Numbers of bird species and population densities, both increased markedly with stand age (respectively r = 0.988 and r = 0.936, P < 0.001). While numbers of ground-nesting bird species failed to correlate with stand age, successively older stands did support ever-greater proportions of species in the assemblage that nested in tree crowns (r = 0.976, P < 0.005) or tree holes (r = 0.833, P < 0.005). Raptors were most abundant in forest at the oldest stages of growth, and there was an age-gradient-related increase in the shares of both plant-eating species (r = 0.952, P < 0.005) and raptors (r = 0.764, P < 0.005). Resident birds were most numerous in the oldest forest. PCA for ten selected variables (relating to guild type) showed that the two principal components explained almost 98% of the variation among groups of bird guilds in relation to forest age. On the basis of their suitability for birds it was possible to distinguish three categories of stand by age group, of which the first encompasses the initial stage, the second a broad interval involving middle-aged stands of between 16 and 140 years, and the third forest more than 140 years old. The presence of the oldest stands of all can thus be seen to play a very important role in maintaining high-diversity populations of birds in managed forest.
The study on the distribution and abundance of beaver families in the Augustowska Primeval Forest was conducted in the years 2000 -2003. It embraced all seven Forest Inspectorates administering the Forest. The study consisted in the penetration of banks along watercourses, lakes and drainage ditches. Lodges, bank dens, dams and the length of the banks colonized by beaver families were plotted on maps. Habitat types contained within the territories of individual beaver families were established on the basis of the maps obtained from Forest Inspectorates. The percentage of bank utilisation by beavers in various types of water bodies was determined. The number of beaver lodges and bank dens, as well as their number per family were established. Also, habitat preferences of beavers in individual water bodies were verified. The presented study has the form of a report which can be used for further monitoring of beaver populations in the Augustowska Primeval Forest.
Habitat structure and selection by the Capercaillie Tetrao urogallus were assessed in the Augustow Forest (NE Poland), where a population of 50–80 birds and 11 active leks existed. Habitat preferences in the local scale were studied, based on measurements of total 1952 circular sample plots with radius of 15 m. On plots, in total, 10 variables describing forest structure (e.g. successional stage, canopy cover, vertical stand structure, share of Scots pine Pinus sylvestris, shrub layer cover, bilberry Vaccinium myrtillus cover, average height of ground vegetation, occurrence of feeding and roosting trees), as well as signs of Capercaillie presence, were assessed. Then, the model of Habitat Suitability Index (his) was constructed. Plots with high HSI scores were used by Capercaillie more often than expected in a case of a random choice, and those with low scores – less than expected. Capercaillie in the Augustow Forest prefers relatively old, one-layered stands, dominated by Scot pine with a sparsely developed shrub layer. The most important differences between abandoned and active leks were related to shrub cover in ground vegetation and height of ground vegetation and share of bilberry.
During the survey of the Mały Borek nature reserve (Augustów Forest, NE Poland) 236 species of vascular plants were recorded, including 10 plant species red-listed in Poland and 19 species protected under the Polish law. The most valuable species were sedges typical of the boreal coniferous forests: Carex vaginata, C. globularis and C. loliacea. The presence of neophytes was very limited (1,3% of the flora) in the area studied. The principal aim of the establishment of the reserve was the conservation of old-growth coniferous forests with long ecological continuity. Since the reserve studied consists mainly of old-growth coniferous forests, the number of species regarded as ancient forest indicators is lower (54 species) than in the well-preserved reserves with deciduous stands in north-east Poland, but still rather high. The most valuable, threatened species are bound to wetland forests that are presently disturbed due to drainage. Restoration of the former hydrological conditions is essential for the preservation of the vascular plants in the reserve.
Angiostrongylus vasorum belongs to the superfamily of Metastrongyloidea. This nematode occurs in foxes, dogs and other predators. The Nematode A. vasorum place themselves in the pulmonary artery and its branches, and in the right ventricle and atrium of the heart. Numerous species of land snails are the intermediate hosts of the parasite. In 2013, lungs and hearts of 76 foxes shot in the Forest District Głęboki Bród in Augustowska Primeval Forest were parasitologically necropsied. Four of the examined foxes were infected with the nematode A. vasorum, a prevalence of 5.2%. In one fox pericardium there were 6 male and 6 female nematodes. In the remaining three foxes nematodes were localized in the pulmonary artery. In two foxes 2 specimens of nematodes were detected (male and female, and two females) while 1 female was detected in the other fox. This is the first report of the presence of the nematode A.vasorum in fox in Poland.
Data on biology and ecology of the butterfly Oeneis jutta occurring within Poland territory are presented. Two confirmed sites of this species located in the Augustowska Primeval Forest, on a raised bog with pine tree stand and in a forest – peat bog complex are described. The only food plant for Oeneis jutta caterpillars is Eriophorum vaginatum. Adult butterflies fly c.a. six weeks, starting from the early days of May. Males appear 7-9 days before females. Peak appearance falls on the turn of May and June. In Poland the species has one-year life cycle, i.e. one generation per year and overwinters as larvae. The main predator is the dragonfly Orthetrum cancellatum.
Occurrence of 316 species of noctuid moths in Puszcza Augustowska Forest has been stated. It makes 63% of all species of this family known from Poland. For each species following characteristics are given: period of appearance of adults, abundance in five-grade scale and spatial distribution over investigated area.
W latach powojennych, aby zwiększyć produkcyjność siedlisk leśnych i zagospodarować mokradła i bagna, budowano leśne systemy melioracyjne. W 1972 roku torfowisko Wilcze Bagno zostało zmeliorowane i zbudowano tam systematyczną sieć rowów odwadniających. Odwodnienie różnie wpłynęło na rosnące tam gatunki drzew (sosnę i świerka). Po 30 latach funkcjonowania systemu stwierdzono, że zabieg odwodnienia spowodował zmniejszenie średniego przyrostu sosny, w niektórych przypadkach nawet o 50%. Odwrotnie zachowywał się świerk. Tutaj wpływ odwodnienia zaowocował zwiększeniem przyrostów tego gatunku na obu badanych siedliskach (dla wartości wieloletnich), a ich dynamika była największa w odległości do 50 m od rowów w siedlisku LMb. W analizowanych okresach pięcioletnich średnie przyrosty świerka nie wykazały jednakowego kierunku zmian.
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