Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "cryptogams" wg kryterium: Temat


Tytuł:
Wykorzystanie mszaków i porostów w bioindykacyjnej ocenie pionowego zróżnicowania warunków mikrosiedliskowych ekosystemów leśnych na przykładzie wiatrołomów w Kampinoskim Parku Narodowym
Application of bryophytes and lichens in the bioindicative assessment of the vertical differentiation of forest ecosystem habitat conditions on the example of windthrowns in the Kampinos National Park
Autorzy:
Zaniewski, P.T.
Fojcik, B.
Tematy:
ecological indicator values
epiphytes
cryptogams
microhabitats
Pokaż więcej
Wydawca:
Polskie Towarzystwo Leśne
Powiązania:
https://bibliotekanauki.pl/articles/978890.pdf  Link otwiera się w nowym oknie
Opis:
Ecological indicator values (EIV) are a commonly used tool for assessing habitat conditions in various ecosystems. They are relatively rarely used for the analysis of epiphytic communities, which results from objective difficulties in the study of this group of organisms in full height gradient on settled trees. Windthrows provide a rare opportunity to fully analyse the biota diversity of epiphytic bryophytes and lichens. The aim of the study was to determine and compare the EIV variability for bryophytes and lichens in the vertical gradient, from terrestrial to different epiphytic exposures. The fieldworks were carried out on two windthrow areas in the Kampinos National Park (central Poland). A set of floristic lists was prepared within five distinguished parts of trees (trunk base, lower trunk, upper trunk, lower crown and upper crown) and three parts of their uproots (pit, bottom root plate and top root plate) for three species (oak, birch, pine). Ten individuals of each tree species were selected. The average values of five ecological indicator values (light, temperature, continentality, humidity and acidity) were calculated within the examined parts of trees and their uproots. The significance of differences between bryophyte and lichen EIV within same parts of trees and their uproots was checked using Wilcoxon paired test. The significance of differences of EIV calculated for bryophytes and lichens pulled together between distinguished tree and uproot parts were checked with Kruskal−Wallis or Mann−Whitney tests. Ordination of researched parts in terms of their EIV was carried out using NMDS method. The values of individual EIV obtained with the use of bryophytes and lichens for the examined parts of trees and their uproots differed significantly in most cases. The values of temperature and continentality in most cases were significantly higher for lichen, which may indicate the need for additional calibration of these indicators for these groups of organisms. The use of both groups of organisms in bioindication has increased the quantity and quality of available ecological information. The research confirmed the usefulness of ecological indicator values as a tool for analysing general habitat conditions in forest ecosystems.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flora of lichens, mosses and liverworts of Wrangel Island: New records
Autorzy:
Evdokimov, Gregory
Afonina, Olga
Konoreva, Liudmila
Obabko, Roman
Mamontov, Yuriy
Chesnokov, Sergey
Frolov, Ivan V.
Babiy, Ulyana V.
Tematy:
Arctic
biodiversity
new records
cryptogams
checklist
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:
https://bibliotekanauki.pl/articles/16538463.pdf  Link otwiera się w nowym oknie
Opis:
New records to lichen flora and bryoflora of Wrangel Island are presented. The additions to the island cryptogam flora include 32 lichens and one lichenicolous fungus, 26 mosses and eleven liverwort species. Acarospora sinopica, Alectoria gowardii, Austroplaca sibirica, Calogaya bryochrysion, Hymenelia ceracea, Porpidia ochrolemma, and Sagiolechia protuberans are new to the island and to the Russian Far East. Two lichen species (Lecidea lithophila and Rinodina terrestris), as well as two liverwort taxa (Clevea hyaline, Lophoziopsis excisa var. elegans and Pseudolophozia debiliformis), are new to the Chukotka Autonomous Area. Two of the reported moss species (Funaria arctica and Schistidium umbrosum) are extremely rare. Location data and ecological descriptions for the newly reported species are included.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vertical concentration gradients of heavy metals in Cladonia lichens across different parts of thalli
Autorzy:
Jankowska, Klaudia
Osyczka, Piotr
Skubała, Kaja
Opis:
Certain lichens of the genus Cladonia are effective heavy-metal-tolerant colonisers of strongly contaminated and disturbed sites. Among them, Cladonia cariosa, Cladonia pyxidata and Cladonia rei are the major components of specific cryptogamic assemblages proven to be bioindicators of soil pollution. This study examines the bioaccumulation capacity and heavy metal accumulation pattern of these species in the context of element concentration levels in various parts of their thalli at various vertical distances from the ground. The content of Zn, Pb, Cd, As and Cu in primary squamules, lower and upper parts of secondary thalli (podetia), and fruiting bodies (apothecia), as well as the corresponding substrate, was analysed using the AAS method. The substrate turned out to be the main source of heavy metals in the examined Cladonia lichens. Element accumulation in particular parts of thalli greatly depends on metal enrichment in the immediate vicinity while Cu/Zn ratios for both substrate and lichen samples were very low and comparable within the species. Concentration levels in thalli usually decrease significantly with distance from the substrate. The exception is copper, which content was frequently higher in apothecia than in the upper parts of podetia. Low bioaccumulation factors calculated for the examined Cladonia specimens classified these lichens as weak accumulators of heavy metals. Even given an extremely high level of contaminants in the substrate, the upper parts of thalli are not greatly affected. Consequently, fruticose and erect growth form, in combination with low accumulation capacity and a remarkable decrease in metal content along a vertical gradient, may be an important attribute of Cladonia lichens in the colonisation of a highly contaminated substrate. The content of elements differs significantly between particular parts of Cladonia thalli; this should be taken into account whenever burdens of heavy metals are used as indicators in biomonitoring studies.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
How do soil factors determine vegetation structure and species richness in post-smelting dumps?
Autorzy:
Skubała, Kaja
Nobis, Marcin
Drozd, Pavel
Osyczka, Piotr
Opis:
This study aims to determine the effects of extreme heavy metal contamination and other soil factors on the structure and species richness of pioneer communities on artificial slag-soil substrates. Lichens, bryophytes, and vascular plants were examined in study plots and chemical properties of corresponding substrate samples were analyzed. Species responses to soil factors were identified by detrended correspondence analysis with interpretation of ordination axes and identification of significant soil parameters using linear mixed-effects models. The interrelationships between species richness and soil factors were evaluated by generalized linear mixed-effects model with Poisson error distribution. Three different responses to substrate contamination were recognized: species most tolerant and favored by strong contamination, less resistant species appearing only on less contaminated dumps and cryptogams indifferent to heavy metal contamination and abundant on all dumps. The species richness of lichens and vascular plants respond differently in relation to heavy metal contamination. Our results indicate that certain cryptogamic species are indifferent to enormous contamination and well adapted to slag substrate. In contrast, highly elevated levels of heavy metals negatively affect vascular plant species richness. Assemblages of pioneer cryptogams are an important element in the natural regeneration of post-smelting wastes and should be taken into account when reclamation activities are planned.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies