scholarly journals Preliminary studies of fungi in the Biebrza National Park (NE Poland). I. Micromycetes

2013 ◽  
Vol 47 (2) ◽  
pp. 213-234 ◽  
Author(s):  
Małgorzata Ruszkiewicz-Michalska ◽  
Cezary Tkaczuk ◽  
Maria Dynowska ◽  
Ewa Sucharzewska ◽  
Jarosław Szkodzik ◽  
...  
Keyword(s):  
National Park ◽  
Taxonomic Diversity ◽  
Ecological Niches ◽  
Trophic Groups ◽  
Short Term ◽  
Fungicolous Fungi ◽  
Ne Poland ◽  
Annotated List ◽  
Wide Range ◽  
Scientific Project

This paper presents the results of the first short-term inventory of fungi species occurring in the Biebrza National Park, one of the biggest and best preserved protected areas of Poland. The paper is focused on a survey of microfungi. Fungi were collected in early autumn 2012, within the framework of a scientific project by the Polish Mycological Society. The results are published in two parts containing micro- and macromycetes, respectively. An annotated list of 188 identified taxa covers true fungi including 33 zygomycetes, 130 ascomycetes (including anamorphs) and 22 basidiomycetes, as well as two chromistan and one protozoan fungal analogues. The identified fungi taxa, inhabiting diverse ecological niches, represent a wide range of trophic groups including saprotrophs, biotrofic and necrotrophic parasites of plants, pathogens of arthropods, fungicolous fungi and species isolated from soil and organic matter. From 188 annotated taxa, 89% (167 species) have not been recorded in the Biebrza National Park until now and four species are newly reported for Poland (<em>Alternaria nobilis, Clonostachys solani, Mariannaea elegans, Metasphaeria cumana</em>). Data on the species richness and taxonomic diversity of the identified fungi are briefly commented in terms of micromycetes role in managing nature conservation.

scholarly journals Preliminary studies of fungi in the Biebrza National Park (NE Poland). II. Macromycetes

2013 ◽  
Vol 47 (2) ◽  
pp. 235-264 ◽  
Author(s):  
Anna Kujawa ◽  
Marta Wrzosek ◽  
Grażyna Domian ◽  
Kamil Kędra ◽  
Jarosław Szkodzik ◽  
...  
Keyword(s):  
Nature Conservation ◽  
Mycorrhizal Fungi ◽  
National Park ◽  
Taxonomic Diversity ◽  
Plant Litter ◽  
Molecular Techniques ◽  
Future Research ◽  
Ecological Niches ◽  
Short Term ◽  
Ne Poland

This paper presents the second part of the results of the first short-term inventory of fungi species occurring in the Biebrza National Park and is focused on a survey of macrofungi. The total number of macrofungi found during the survey in late August 2012 was 289 taxa: 17 ascomycetes and 272 basidiomycetes, inhabiting diverse ecological niches. The identified fungi belonged to ectomycorrhizal symbionts and saprobionts decomposing wood, plant litter and animal remnants. The identity of 25 mycorrhizal fungi species has been confirmed using molecular techniques. Five species are newly reported for Poland (<em>Amanita olivaceogrisea, Lepiota lepida, Stropharia alcis, Xerocomus fennicus, X. cisalpinus</em>) and 225 taxa (79 %) were not known in the Biebrza National Park. Fifty species are endangered in Poland, of which nine species are protected by law. Data on species richness and the taxonomic diversity of the identified fungi are briefly commented in terms of their significance for nature conservation and future research.

Benthic Cyanoprokaryota from waterbodies of the National Park «Valdaisky» (Novgorod Region)

2015 ◽  
Vol 49 ◽  
pp. 52-74 ◽  
Author(s):  
S. V. Smirnova
Keyword(s):  
National Park ◽  
Nostoc Punctiforme ◽  
Summer Period ◽  
Benthic Species ◽  
Brackish Waters ◽  
Annotated List ◽  
Considerable Portion ◽  
Wide Range ◽  
First Time ◽  
Tolypothrix Tenuis

So far, the systematic study of benthic Cyanoprokaryota of Novgorod Region was not performed. During the summer period 2012–2013, benthic cyanoprokaryotеs from waterbodies of the National Park «Valdaisky» were studied for the first time. An annotated list of 147 species and 4 intraspecific taxa of Cyanoprokaryota belonging to 40 genera, 25 families, 6 orders, 3 subclasses is provided. These species were collected in the benthos of 155 waterbodies (57 lakes, 4 ponds, 33 pools, 13 eutrophic mires, 26 Sphagnum mires, 11 rivers, 7 streams, 4 springs). Most widespread taxa are Geitlerinema splendidum, Phormidium formosum, Oscillatoria tenuis. Also Hapalosiphon pumilus, Tolypothrix tenuis, Leibleinia epiphytica, Nostoc punctiforme, N. paludosum, and representatives of genus Gloeotrichia (G. natans, G. intermedia, G. pisum) are frequent. The list is annotated by data on typical habitats, water salinity and pH preferences, and distribution. Taxonomic comments are provided for selected species. In total 14 species (marked with two asterisks — **) are recorded for the first time in Russia, 112 — in the Novgorod Region (marked with one asterisk — *). Apart from strictly benthic species (69 %), the plankto-benthic (20 %), epiphytic (7 %), and endophytic (4 %) species have been recorded. Freshwater and indifferent to pH cyanoprokaryotes dominate in the studied waterbodies, and comprise 86 % and 60 % of recorded species respectively. Significant part is composed by cosmopolitan and boreal species (28 % each), accounted for a considerable portion of Holarctic species (18 %). The name of a taxon in the list is followed by Arabic numerals referring to the lake, and indications of its abundance by Cyrillic abbreviations: м. — in mass, оч. ч. — very often, ч. — often, н. — not rare, р. — rare, ед. — single. The other used abbreviations are as follows: кл. — cells, кол. — colonies, трих. — trichomes, гет. — heterocyts, акин. — akinets; дл. — length, шир. — width, диам. — diameter; б. — benthic, пл.-б. — plankto-benthic, эп. — epiphytic, энд. — endophytic; пр. — freshwater, пр.-сол. — in fresh and brackish waters, эвр. — euryhaline; алк. — alkaliphilic, ац. — acidophilic, инд. — indifferent to pH, широк. — in wide range of pH; к. — cosmopolitan, бор. — boreal, аркт.-бор. — arctic-boreal, бор.-троп. — borealtropical, бор.-неотроп. — boreal-neotropical, бор.-новозел. — boreal-New Zealand, гол. — holarctic, гол.-неотроп. — holarctic-neotropical, гол.-палеотроп. — holarctic-paleotropical, неясн. распр. — distribution unclear

To the hepatic flora of the Sochi National Park (Western Caucasus)

2011 ◽  
Vol 45 ◽  
pp. 301-317 ◽  
Author(s):  
N. A. Konstantinova ◽  
A. N. Savchenko
Keyword(s):  
National Park ◽  
Conservation Value ◽  
Western Caucasus ◽  
The Caucasus ◽  
European Species ◽  
Red Data Book ◽  
Annotated List ◽  
New Localities ◽  
Data Book ◽  
First Time

The annotated list of hepatics of the Sochi National Park includes 80 taxa. It is based on literature records and identification of 250 specimens collected by the authors. Scapania obcordata (Berggr.) S. W. Arnell and Calypogeia fissa (L.) Raddi var. intermedia (C. E. O. Jensen) Jorg. are new for the Caucasus, 17 taxa are new for Krasnodar Territory, 41 hepatics are reported for the first time for the park. New localities of 3 red-listed European species and of 6 species included in the Red Data Book of Krasnodar Territory are cited, indicating significant conservation value of the reserve.

scholarly journals Leeches as the intermediate host for strigeid trematodes: genetic diversity and taxonomy of the genera Australapatemon Sudarikov, 1959 and Cotylurus Szidat, 1928

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Ewa Pyrka ◽  
Gerard Kanarek ◽  
Grzegorz Zaleśny ◽  
Joanna Hildebrand
Keyword(s):  
Intermediate Host ◽  
Life Cycles ◽  
Coi Gene ◽  
Small Rivers ◽  
Ecological Niches ◽  
Its2 Region ◽  
28S Rrna ◽  
Intermediate Hosts ◽  
Internal Transcribed Spacer Region ◽  
Wide Range

Abstract Background Leeches (Hirudinida) play a significant role as intermediate hosts in the circulation of trematodes in the aquatic environment. However, species richness and the molecular diversity and phylogeny of larval stages of strigeid trematodes (tetracotyle) occurring in this group of aquatic invertebrates remain poorly understood. Here, we report our use of recently obtained sequences of several molecular markers to analyse some aspects of the ecology, taxonomy and phylogeny of the genera Australapatemon and Cotylurus, which utilise leeches as intermediate hosts. Methods From April 2017 to September 2018, 153 leeches were collected from several sampling stations in small rivers with slow-flowing waters and related drainage canals located in three regions of Poland. The distinctive forms of tetracotyle metacercariae collected from leeches supplemented with adult Strigeidae specimens sampled from a wide range of water birds were analysed using the 28S rDNA partial gene, the second internal transcribed spacer region (ITS2) region and the cytochrome c oxidase (COI) fragment. Results Among investigated leeches, metacercariae of the tetracotyle type were detected in the parenchyma and musculature of 62 specimens (prevalence 40.5%) with a mean intensity reaching 19.9 individuals. The taxonomic generic affiliation of metacercariae derived from the leeches revealed the occurrence of two strigeid genera: Australapatemon Sudarikov, 1959 and Cotylurus Szidat, 1928. Phylogenetic reconstructions based on the partial 28S rRNA gene, ITS2 region and partial COI gene confirmed the separation of the Australapatemon and Cotylurus clades. Taking currently available molecular data and our results into consideration, recently sequenced tetracotyle of Australapatemon represents most probably Au. minor; however, unclear phylogenetic relationships between Au. burti and Au. minor reduce the reliability of this conclusion. On the other hand, on the basis of the obtained sequences, supplemented with previously published data, the metacercariae of Cotylurus detected in leeches were identified as two species: C. strigeoides Dubois, 1958 and C. syrius Dubois, 1934. This is the first record of C. syrius from the intermediate host. Conclusions The results of this study suggest the separation of ecological niches and life cycles between C. cornutus (Rudolphi, 1808) and C. strigeoides/C. syrius, with potential serious evolutionary consequences for a wide range of host–parasite relationships. Moreover, phylogenetic analyses corroborated the polyphyletic character of C. syrius, the unclear status of C. cornutus and the separate position of Cotylurus raabei Bezubik, 1958 within Cotylurus. The data demonstrate the inconsistent taxonomic status of the sequenced tetracotyle of Australapatemon, resulting, in our opinion, from the limited availability of fully reliable, comparative sequences of related taxa in GenBank.

Effects of Atovaquone on the Ultrastructural Morphology of Pneumocystis Carinii

1997 ◽  
Vol 3 (S2) ◽  
pp. 81-82
Author(s):  
M.P. Goheen ◽  
M.S. Bartlett ◽  
M.M. Shaw ◽  
S.R. Meshnick ◽  
J.W. Smith
Keyword(s):  
Adverse Reactions ◽  
Pneumocystis Carinii ◽  
Spinner Flask ◽  
Short Term ◽  
Human Embryonic Lung ◽  
Transmission Electron ◽  
Significant Incidence ◽  
Wide Range ◽  
Acquired Immunodeficiency ◽  
Immunodeficiency Syndrome

Pneumocystis carinii pneumonia (PCP) occurs at some time in most patients with acquired immunodeficiency syndrome (AIDS). Trimethoprim/sulfamethoxazole or pentamidine isothionate are the traditional modes of therapy for treatment and prophylaxis of PCP. Unfortunately these drugs are associated with a significant incidence of adverse side effects particularly in patients with AIDS. Toxicity and a growing concern that P. carinii strains are becoming resistant to these compounds is providing the impetus for the search for additional drugs to combat P. carinii. Atovaquone, developed as an antimalarial agent, has activity against a wide range of other organisms, including Toxoplasma sp. and P. carinii, with a lower incidence of adverse reactions during clinical trials. Atovaquone inhibits mitochondrial respiration in P. falciparum and P. carinii. In this study transmission electron microscopy (TEM) was used to observe the effects of atovaquone on P. carinii organisms in short term spinner flask culture.Spinner flask cultures of human embryonic lung cells were inoculated with P. carinii from infected rat lung.

scholarly journals Carbon Source Preference in Chemosynthetic Hot Spring Communities

2015 ◽  
Vol 81 (11) ◽  
pp. 3834-3847 ◽  
Author(s):  
Matthew R. Urschel ◽  
Michael D. Kubo ◽  
Tori M. Hoehler ◽  
John W. Peters ◽  
Eric S. Boyd
Keyword(s):  
High Temperature ◽  
National Park ◽  
Hot Springs ◽  
Dissolved Inorganic Carbon ◽  
Hot Spring ◽  
Affinity Constant ◽  
Rrna Gene ◽  
Organic Substrates ◽  
Short Term ◽  
Acetate Assimilation

ABSTRACTRates of dissolved inorganic carbon (DIC), formate, and acetate mineralization and/or assimilation were determined in 13 high-temperature (>73°C) hot springs in Yellowstone National Park (YNP), Wyoming, in order to evaluate the relative importance of these substrates in supporting microbial metabolism. While 9 of the hot spring communities exhibited rates of DIC assimilation that were greater than those of formate and acetate assimilation, 2 exhibited rates of formate and/or acetate assimilation that exceeded those of DIC assimilation. Overall rates of DIC, formate, and acetate mineralization and assimilation were positively correlated with spring pH but showed little correlation with temperature. Communities sampled from hot springs with similar geochemistries generally exhibited similar rates of substrate transformation, as well as similar community compositions, as revealed by 16S rRNA gene-tagged sequencing. Amendment of microcosms with small (micromolar) amounts of formate suppressed DIC assimilation in short-term (<45-min) incubations, despite the presence of native DIC concentrations that exceeded those of added formate by 2 to 3 orders of magnitude. The concentration of added formate required to suppress DIC assimilation was similar to the affinity constant (Km) for formate transformation, as determined by community kinetic assays. These results suggest that dominant chemoautotrophs in high-temperature communities are facultatively autotrophic or mixotrophic, are adapted to fluctuating nutrient availabilities, and are capable of taking advantage of energy-rich organic substrates when they become available.

Pythium aphanidermatum. [Descriptions of Fungi and Bacteria].

1964 ◽  
Author(s):  
G. M. Waterhouse
Keyword(s):  
Sierra Leone ◽  
Geographical Distribution ◽  
Central African Republic ◽  
New Caledonia ◽  
Pythium Aphanidermatum ◽  
Damping Off ◽  
Stalk Rot ◽  
Annotated List ◽  
Wide Range ◽  
Southern Rhodesia

Abstract A description is provided for Pythium aphanidermatum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On a wide range of hosts, often similar to those attacked by P. butleri, but inducing different symptoms, represented in the following families: Amaranthaceae, Amaryllidaceae, Araceae, Basellaceae, Bromeliaceae, Cactaceae, Chenopodiaceae, Compositae, Coniferae, Convolvulaceae, Cruciferae, Cucurbitaceae, Euphorbiaceae, Gramineae, Leguminosae, Linaceae, Malvaceae, Moraceae, Passifloraceae, Rosaceae, Solanaceae, Umbelliferae, Violaceae, Vitaceae, Zingiberaceae. DISEASES: Damping-off of various seedlings; 'cottony-leak' of cucurbit fruit in storage; 'cottony blight' of turf grasses; root and stalk rot of maize. Other hosts: tobacco, sugar-beet, sugar-cane, papaw, pineapple, ginger, bean and cotton. GEOGRAPHICAL DISTRIBUTION: Africa (Central African Republic, Fernando, Ghana, Kenya, Malawi, Mali, Nigeria, Sierra Leone, South Africa, Southern Rhodesia, Sudan, Togo, Zambia); Asia (Ceylon, China, Formosa, India, Indonesia, Israel, Japan, Java, Malaya, Philippines, Sumatra); Australasia & Oceania (Australia, Hawaii, New Caledonia); North America (Canada, Mexico); Central America & West Indies (Antilles, Jamaica, Puerto Rico); South America (Argentina, Brazil, Peru, Venezuela); Europe Austria, Cyprus, Czechoslovakia, Great Britain, Greece, Holland, Italy, Poland, U.S.S.R., Yugoslavia). (CMI Map 309) TRANSMISSION: Soil-borne. Eggplant fruit become infected when blossom end is in contact with soil (5: 465). Readily isolated from soil using fresh potato cubes treated with streptomycin and pimaricin as baits (43, 1519; 43, 46) or seedling papaw roots in soil containing papaw tissue (43, 1720). Also recorded as seed-borne on tomato and cucurbits but doubtful whether seed-transmitted (see Noble et al., An Annotated List of Seed-Borne Diseases, 1958, pp. 23, 25, 124).

scholarly journals Adaptation limits ecological diversification and promotes ecological tinkering during the competition for substitutable resources

2018 ◽  
Vol 115 (44) ◽  
pp. E10407-E10416 ◽  
Author(s):  
Benjamin H. Good ◽  
Stephen Martis ◽  
Oskar Hallatschek
Keyword(s):  
Evolutionary Dynamics ◽  
Competitive Exclusion ◽  
Directional Selection ◽  
Ecological Niches ◽  
Ecological Diversification ◽  
Effective Competition ◽  
Uptake Rates ◽  
Wide Range ◽  
Dynamical Features ◽  
Adaptation Limits

Microbial communities can evade competitive exclusion by diversifying into distinct ecological niches. This spontaneous diversification often occurs amid a backdrop of directional selection on other microbial traits, where competitive exclusion would normally apply. Yet despite their empirical relevance, little is known about how diversification and directional selection combine to determine the ecological and evolutionary dynamics within a community. To address this gap, we introduce a simple, empirically motivated model of eco-evolutionary feedback based on the competition for substitutable resources. Individuals acquire heritable mutations that alter resource uptake rates, either by shifting metabolic effort between resources or by increasing the overall growth rate. While these constitutively beneficial mutations are trivially favored to invade, we show that the accumulated fitness differences can dramatically influence the ecological structure and evolutionary dynamics that emerge within the community. Competition between ecological diversification and ongoing fitness evolution leads to a state of diversification–selection balance, in which the number of extant ecotypes can be pinned below the maximum capacity of the ecosystem, while the ecotype frequencies and genealogies are constantly in flux. Interestingly, we find that fitness differences generate emergent selection pressures to shift metabolic effort toward resources with lower effective competition, even in saturated ecosystems. We argue that similar dynamical features should emerge in a wide range of models with a mixture of directional and diversifying selection.

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