Iwona Dembicz

Iwona Dembicz
University of Warsaw | UW · Department of Ecology and Environmental Conservation

PhD

About

171
Publications
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786
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Publications

Publications (171)
Article
Full-text available
The inneralpine dry valleys of the Swiss Alps are characterized by subcontinental climate, leading to many peculiarities in dry grassland species composition. Despite their well-known uniqueness, comprehensive studies on biodiversity patterns of the dry grasslands in these valleys were still missing. To close this gap, we sampled 161 10-m² vegetati...
Article
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Understanding the variation in community composition and species abundances (i.e., β‐diversity) is at the heart of community ecology. A common approach to examine β‐diversity is to evaluate directional variation in community composition by measuring the decay in the similarity among pairs of communities along spatial or environmental distance. We p...
Article
Full-text available
Species abundance distributions (SADs) link species richness with species abundances and are an important tool in the quantitative analysis of ecological communities. Niche based and sample based SAD models predict different spatial scaling properties of SAD parameters. However, empirical research of SAD scaling properties is largely missing. Here,...
Article
Although bryophytes play an important role in grassland ecosystems, environmental factors that drive bryophyte assemblages were rarely studied, especially in low‐intensity traditional grasslands. Therefore, using fine‐scale data on bryophyte assemblages in traditionally managed secondary grasslands, we studied the relative importance of several set...
Article
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The 15th EDGG Field Workshop took place from 24 May to 3 June 2021 in Southern Ukraine (Kherson and Mykolaiv administrative regions). Over 10 days, we sampled different types of grasslands, mainly focusing on dry grasslands of the classes Festuco-Brometea, Koelerio-Corynephoretea canescentis, and Festuco-Puccinellietea (steppic, sandy and saline, r...
Article
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We report the first record of Torilis pseudonodosa Bianca (Apiaceae) from Ukraine. It was found on 28th of May 2021 in the “Potiivska” section of the Black Sea Biosphere Reserve near the village of Zaliznyi Port (Southern Ukraine). Torilis pseudonodosa previously was known from various countries in the Mediterranean Basin and Western Asia, but not...
Article
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Aims : To quantify how fine-grain (within-plot) beta diversity differs among biomes and vegetation types. Study area : Palaearctic biogeographic realm. Methods : We extracted 4,654 nested-plot series with at least four different grain sizes between 0.0001 m² and 1,024 m² from the GrassPlot database spanning broad geographic and ecological gradients...
Article
Aims : To quantify how fine-grain (within-plot) beta diversity differs among biomes and vegetation types. Study area : Palaearctic biogeographic realm. Methods : We extracted 4,654 nested-plot series with at least four different grain sizes between 0.0001 m² and 1,024 m² from the GrassPlot database spanning broad geographic and ecological gradients...
Article
Full-text available
Changes in natural landscapes and economic activities lead to the loss of a large proportion of the steppes. Recent studies (2008–2017) have demonstrated the high importance of old cemeteries, that contribute to the preservation of steppe red-listed steppe species. The area of the old cemeteries of the Lower Dnieper varies from 0.43 ha to 6.79 ha....
Article
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Aims : To clarify the syntaxonomic position of the grasslands in Navarre, with special focus on the dry grasslands, and to characterise the resulting syntaxonomic units in terms of diagnostic species and ecological conditions. Study area : Navarre (northern Spain). Methods : We sampled 119 plots of 10 m ² following the standardised EDGG methodology...
Article
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Aims : We studied the syntaxonomic position, biodiversity, ecological features, nature conservation value and current status of dry grasslands investigated by Josias Braun-Blanquet more than 60 years ago. Study area : Inner-alpine valleys of Austria. Methods : We sampled 67 plots of 10 m ² , following the standardized EDGG methodology. We subjected...
Article
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Aims Understanding fine-grain diversity patterns across large spatial extents is fundamental for macroecological research and biodiversity conservation. Using the GrassPlot database, we provide benchmarks of fine-grain richness values of Palaearctic open habitats for vascular plants, bryophytes, lichens and complete vegetation (i.e., the sum of the...
Article
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Questions: Which environmental factors influence fine-grain beta diversity of vegetation and do they vary among taxonomic groups? Location: Palaearctic biogeographic realm. Methods: We extracted 4,654 nested-plot series with at least four different grain sizes between 0.0001 m² and 1,024 m² from the GrassPlot database, covering a wide range of di...
Article
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Questions: Species-area relationships (SARs) are fundamental for understanding biodiversity patterns and are generally well described by a power law with a constant exponent z. However, z-values sometimes vary across spatial scales. We asked whether there is a general scale dependence of z-values at fine spatial grains and which potential drivers i...
Article
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The EDGG methodology of sampling multi-scale biodiversity in grasslands and other open habitats is widely applied and has proven to be a highly informative and effective way of recording high-quality data allowing for a multitude of different analyses. Based on our experiences with sampling, storing and analysing such data, here we propose three ad...
Data
Conceptual figure summarizing our hypotheses how different drivers could influence fine-grain β-diversity via changing mean occupancy of species, based on the findings of our study and theoretical considerations. Fine-grain β-diversity (and likewise for larger grain sizes) is mathematically linked to mean occupancy, which can be decomposed into (i)...
Article
Questions: Which are the main environmental drivers of plot-scale alpha diversity and beta diversity in arid steppes? Do they vary between functional groups and across grain sizes? Location: Central Alborz Mts., N Iran. Methods: We sampled vascular plants in 23 nested-plot series with nine grain sizes from 0.0001 to 1000 m2 and 334 25-m2 vegetation...
Preprint
Full-text available
Understanding the variation in community composition and species abundances, i.e., β-diversity, is at the heart of community ecology. A common approach to examine β-diversity is to evaluate directional turnover in community composition by measuring the decay in the similarity among pairs of communities along spatial or environmental distances. We p...
Article
Full-text available
This report summarizes the activities and achievements of the Eurasian Dry Grassland Group (EDGG) from July 2019 to December 2020. During this period, Covid-19 allowed only one live event, the 14th EDGG Field Workshop to the alpine vegetation of Switzerland, organised ad hoc as a replacement for the cancelled Field Workshop in the Ukrainian steppes...
Article
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Questions: Steppes are among the most transformed and fragmented biomes of the world, but studies on the impact of habitat loss and fragmentation on these zonal grasslands are scarce. In many regions, steppe survived only on small habitat islands, surrounded by intensive croplands, particularly on kurgans (ancient burial mounds). We asked how the s...
Article
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Questions: Studying dry grasslands in a previously unexplored region, we asked: (i) Which environmental factors drive the diversity patterns in vegetation? (ii) Are taxonomic groups (vascular plants, bryophytes, lichens) and functional vascular plant groups differently affected? (iii) How is fine-grain beta diversity affected by environmental drive...
Book
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Monografia poświęcona kurhanom jako obiektom przyrodniczym, będąca podsumowaniem 8-letnich badań nad florą kurhanów w różnych strefach klimatyczno-roślinnych Ukrainy, prowadzonych przez polsko-ukraiński zespół badaczy – pracowników Uniwersytetu Warszawskiego oraz Uniwersytetu Chersońskiego. Publikacja ta powstała we współpracy ze specjalistami z in...
Technical Report
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The year 2020 is coming to an end, certainly the most unusual year of the recent decades. None of us could do science as planned, all of us were affected by severe restrictions in their lives and some from the GrassPlot members even personally suffered from a Covid-19 infection. Therefore, we are happy that, after all these bad news of the past 12...
Article
Full-text available
Agricultural intensification in the last century resulted in a significant loss and fragmentation of steppe habitats. As a result, steppes are scattered and rarely preserved in highly transformed landscapes. Steppe patches have often remained on sites with cultural importance, such as ancient burial mounds (kurgans), old cemeteries or ancient settl...
Article
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The aim of our study was to complete the syntaxonomical scheme for grassland vegetation of the lowland, montane and alpine zones in the Pamir-Alai and western Tian Shan Mts in Tajikistan and Kyrgyzstan with some remarks on its environmental predictors. A total of 198 relevés were sampled in 2013–2018 using the seven-degree cover-abundance scale of...
Article
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The 14th EDGG Field Workshop took place from the 4th to the 14th of September 2020 in Switzerland, and was devoted to the vegeation of open habitats in the subalpine and alpine zones. In total, 26 EDGG Biodiversity Plots (nested plots with grain sizes of 0.0001 to 100 m²) were sampled in different open habitat types (grasslands, heathlands, screes,...
Article
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PhD students and Postdocs are generally rather rare at the IUNR compared to full universities where these two groups account for a big fraction of the staff. In the academic year 2019/20 two Postdocs have joined the Vegetation Ecology Research Group, Dr. Iwona Dembicz from Poland for 9 ½ months and Dr. Jinghui Zhang from China for a whole year. We...
Technical Report
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This Behind the paper post refers to the article by Dembicz et al. Drivers of plant diversity in Bulgarian dry grasslands vary across spatial scales and functional-taxonomic groups, published in the Journal of Vegetation Science (https://doi.org/10.1111/jvs.12935).
Book
Full-text available
THE PAMIR-ALAI MOUNTAINS are extremely diverse in terms of climate, landscape and habitat conditions. With one of the largest altitudinal amplitudes in the world, long gradients of precipitation and temperatures, different soil substrates and a diverse geology, the Pamir-Alai promotes a great number of plant species and diverse vegetation types. Cu...
Article
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The 13 th EDGG Field Workshop was conducted from the 26 June to 6 July 2019 in Armenia. The Field Workshop had two main aims: (a) to analyse the biodiversity patterns of the Armenian grasslands across multiple taxonomic groups and grain sizes, and (b) to study the syntaxonomic position of these grasslands in a general European context. We conducted...