Search results for "raised bog"
showing 10 items of 10 documents
Carbon accumulation rate in a raised bog in Latvia, NE Europe, in relation to climate warming
2018
The carbon accumulation rate (CAR) over the last 180 years was estimated by measuring carbon concentrations in 1-cm layers in a fine-resolution dated and analysed peat sequence in Teiči Bog, Latvia, NE Europe. We used the Granger causality test to examine the temporal (lagged) relationships between the CAR and the historical climate variables. Our results showed that the average CAR was 192 g C m–2 yr–1 during the last 180 years and 169 g C m–2 yr–1 when excluding the acrotelm where decomposition and the stock of carbon are still not in the balance. The Granger causality test showed significant positive temporal associations between the temperature and the CAR, indicating that the temperatu…
Augsto purvu apsaimniekošana bioloģiskās daudzveidības saglabāšanai Latvijā
2013
Augstie purvi Latvijā ir īpaša ekosistēma. Tie sākuši veidoties pirms apmēram 9000 gadu, līdz ar to purvi ietver informāciju par klimata un veģetācijas izmaiņām un cilvēka darbības atstātajām pēdām. Eiropas Savienībā augstā purva biotopi ir kļuvuši par prioritāri aizsargājamiem. Purvu aizsardzība ir nepieciešama, un tā jāturpina ne tikai Latvijā, bet arī citās Eiropas valstīs. Līdz ar to aktuāli ir purvu apsaimniekošanas pasākumi, kas veicina hidroloģiskā režīma stabilizēšanu un biotopu atjaunošanos.
Augstā purva biotopu atjaunošana īpaši aizsargājamās dabas teritorijās Latvijā 2010-2013
2013
Purvs ir viena no jutīgākajām dabas ekosistēmām. Projekta mērķis ir atjaunot augstā purva biotopus četru dabas liegumu – Melnā ezera purva, Aklā purva, Rožu purva, Aizkraukles purvu un mežu – degradētajās platībās un pievērst sabiedrības uzmanību Latvijas dabas vērtībām.
Augstā purva biotopu atjaunošana īpaši aizsargājamās dabas teritorijās Latvijā
2010
Purvs ir mitra dzīvotne, kurai raksturīga aktīva kūdras veidošanās. Tā ir mājvieta daudziem augiem un dzīvniekiem, kuri nespēj dzīvot citur. Neskarti augstie purvi ir rets un apdraudēts biotops Eiropā. Nosusināšana, kūdras ieguve, mežu stādīšana un zemes rekultivācija pēdējās desmitgadēs ir nelabvēlīgi ietekmējusi purvus. Meliorācijas sistēmu ietekmes dēļ Aizkraukles purvā un mežos, Aklajā, Rožu un Melnā ezera purvā purva biotopi ir izmainījušies. Projekta mērķis ir atjaunot dabisko ūdens līmeni projekta vietās – augstā purva biotopos, kurus ir ietekmējusi nosusināšana – tādējādi aizsargāt Eiropas un Latvijas nozīmes purva biotopus, augus un dzīvniekus.
After-LIFE conservation plan
2013
Main aim of the project was to re-establish hydrological regimeof natural raised bogs in four Nature Reserves. The paper shows activities have to be continued.
Classification of European bog vegetation of the Oxycocco-Sphagnetea class
2022
Aims: Classification of European bog vegetation (Oxycocco-Sphagnetea class); identification of diagnostic species for the class and vegetation subgroups (orders and alliances); development of an expert system for automatic classification of vegetation plots; and production of distribution maps of the Oxycocco-Sphagnetea class and its alliances. Location: Europe. Methods: A data set of vegetation-plot records was compiled to include various bog types over most of the European continent. An unsupervised classification (beta-flexible linkage method, Sørensen distance measure) and detrended correspondence analysis (DCA) ordination were applied. Formal definitions of syntaxa based on species pre…
Conservation Status of Some Peatbogs in Maramureş County
2016
AbstractPeat bogs and specially raised bogs are vulnerable ecosystems all over the world and they create refuges for some rare plant species. The aim of this paper is to provide information regarding the conservation status of five oligotrophic peat bogs situated in the volcanic mountains in the Oriental Chain of Carpathians, in Maramureș County. The studied peat bogs are: Tăul lui Dumitru (Dumitru Pond), Mlaștina Vlășinescu (Vlășinescu Peat bog), Iezeru Mare (Big Tarn), Tăul Chendroaiei (Chendroaiei Pond) and Tăul Negru (Black Pond), all of them have the status of nature reserve and under the IUCN categories they are included in category IV Habitat/Species Management Area (www.iucn.org, 20…
Abrupt Alnus population decline at the end of the first millennium CE in Europe - The event ecology, possible causes and implications
2019
The study, based on the examination of 70 published and unpublished pollen profiles from Poland and supplementary data from the surrounding regions, shows that an abrupt, episodic Alnus population decline at the end of the first millennium CE was a much more widespread event than has been previously reported, spanning large areas of the temperate and boreal zones in Europe. The data from Poland suggest that the decline was roughly synchronous and most likely occurred between the 9th and 10th centuries, with strong indications for the 10th century. The pollen data indicate that human impacts were not a major factor in the event. Instead, we hypothesize that one or a series of abrupt climatic…
Properties and structure of raised bog peat humic acids
2013
Abstract Humic substances form most of the organic components of soil, peat and natural waters, and their structure and properties differ very much depending on their source. The aims of this study are to characterize humic acids (HAs) from raised bog peat, to evaluate the homogeneity of peat HAs within peat profiles, and to study peat humification impact on properties of HAs. A major impact on the structure of peat HAs have lignin-free raised bog biota (dominantly represented by bryophytes of different origin). On diagenesis scale, peat HAs have an intermediate position between the living organic matter and coal organic matter, and their structure is formed in a process in which more labil…
Characterization of Humic Acids from Raised Bog Peat
2014
Abstract Humic substances form most of the organic component of soil, peat and natural waters, but their structure and properties are very much dependent on the source. The aim of this study was to characterize humic acids from raised bog peat to evaluate the homogeneity of humic acids isolated from the bog bodies and to study peat humification impact on the properties of humic acids. Peat humic acids (HA) have an intermediate position between the living organic matter and coal organic matter, with their structure formed in a process where the relatively labile moieties (carbohydrates, amino acids, etc.) are destroyed, and thermodynamically more stable aromatic and polycyclic structures eme…