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Ecological characteristics of nivicolous slime molds with respect to climate change
Leshchenko, Yuliia ; Koukol, Ondřej (advisor) ; Man, Matěj (referee)
This diploma thesis focuses on nivicolous myxomycetes, a group of amoeboid protists widely distributed in terrestrial ecosystems, particularly in alpine, subalpine, and arctic zones. The main objective is to distinguish whether subgroups of nivicolous myxomycetes have distinct spatial requirements and to identify the key environmental factors influencing their distribution. I employed species distribution modelling (SDM) using three methods (MaxEnt, BIOCLIM, and Random Forest) to predict the habitat suitability of these subgroups. Three taxon experts validated the model predictions. This diploma thesis also explores the potential impact of climate change on their distribution using future climate projection scenarios. The results suggest that SDMs may not fully capture the complexity of habitat requirements for nivicolous myxomycetes in the European part of the Palearctic, however key bioclimatic variables for the study group were distinguished: temperature seasonality, precipitation of the warmest quarter, the maximum temperature of the warmest month. The evaluation by experts reveals some limitations regarding the research design, such as the need for accurate species categorization and consideration of fine-scale environmental variations in the study region. Keywords: nivicolous myxomycetes,...
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Analysis of factors of ecological niche and development of habitat suitability model for Minuartia smejkalii
Linyucheva, Anastasia ; Münzbergová, Zuzana (advisor) ; Man, Matěj (referee)
This study focuses on the analysis of the ecological niche of M. smejkalii, mapping areas with suitable conditions for this plant both in locations with its original occurrence and over a larger territory. A combination of variables calculated based on remote Earth exploration data was used to compile habitat suitability models. For evaluating factors that limit the occurrence of M. smejkalii, ENFA analysis and the results of the MAXENT model were used. The study also emphasizes the importance of correct choice of predictors and evaluation of correlations in the data for constructing the HSM. Research shows that an inappropriate combination of variables can significantly limit prediction accuracy, making reliable evaluation of such results impossible. The final habitat suitability model includes predictors describing local thermal and humidity conditions, vegetation type, and vegetation stress level at the sites of M. smejkalii occurrence. Based on the results of the model, local conditions reflected in these variables can be defined. However, due to the uncertainty in the predictions with more variables included in models and the presence of a significant amount of artifacts, other variables were not included in the final model. The main limitation of this study is the small spatial variability of...
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Distribution modelling of mountain endemic species of the Balkans peninsula
Rataj, Jakub ; Smyčka, Jan (advisor) ; Man, Matěj (referee)
Endemism is a biogeographical phenomenon where a taxon is restricted to a certain area and does not occur elsewhere. The study of the ranges of such taxa may provide new insights into their evolutionary history or the history of the locality where they are currently found. In the European context, mountainous areas are more interesting from this point of view, because they are characterized by a higher degree of endemism than the adjacent lowlands. One method how to effectively describe the range of an endemic species is species distribution models, SDMs. Based on these models, we are able to quantify the relationships between species and environmental components or predict the occurrence of species to new spatial and temporal locations. The resulting models have the potential to be incorporated into a wide range of other studies. The aim of this bachelor thesis is to summarize the issues involved in this type of ecological modeling in the context of mountain endemic plants. Emphasis is placed on the individual specifics of the biological and environmental data used for this purpose and on the analysis of the different statistical methods and furthermore on the characterization of endemic taxa of the Balkan Peninsula, which should be the focus of a follow-up thesis.
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Microclimate as a driver of species distribution and community composition of bryophytes compared with lichens
Růžičková, Anna ; Man, Matěj (advisor) ; Starosta, Jakub (referee)
This bachelor thesis deals with the influence of microclimate on species distribution and composition of bryophyte and lichen communities. It defines the term microclimate, characterizes the specific properties of bryophytes responsible for their sensitivity to microclimatic conditions and includes a comparison of the role of individual microclimatic factors in controlling the distribution of bryophytes and lichens. The key microclimatic factors for bryophytes are humidity and air temperature, but the significance of each varies between functional groups of species and depending on the type of biome. With the available portable measuring devices with large battery capacity and memory storage, it is now possible to measure in-situ microclimate for the long-term and also with high spatial and temporal resolution. Despite that, there are currently only 12 bryological studies that provide continuously measured field microclimatic data on small spatial scales. The main part of the thesis summarizes these studies and compares the methodologies used. The paper can serve as a starting material for designing bryological microclimatic studies.
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Field bryophytes of the Czech Republic
Man, Matěj ; Soldán, Zdeněk (advisor) ; Němcová, Lenka (referee)
3 ABSTRACT More than 30 % of agricultural land in Europe also Czech Republic is covered by arable fields. There is no evidence about diversity of some arable fields bounded species groups. In general the diversity of arable land species is less than the wild land species. For increasing species diversity in agricultural land European commission comes up with agri environmental farming schemes in 90's. Till now real effectiveness of the agri environmental schemes is not clear for all species groups. In my thesis I have investigated whether the diversity and community composition of arable bryophytes species is influenced by agri environmental or conventional management on cereal fields. The influence of agri environmental management on arable bryophytes was never investigated in Europe unlike the other species groups like vascular plants, non vertebrates or vertebrates. The thesis stands on dataset provided by Ministry of agriculture for 3 Czech regions (kraj Vyso ina, Pardubický kraj, St edo eský kraj). My own research of arable bryophytes diversity held on 12 fields within 6 localities is the main part of the thesis supplemented by basic soil measurements and climatic characteristics extractions. Main result of the thesis is finding that conventional management has marginally positive effect on arable...
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The study of bryophyte species richness and community composition on a very fine spatial scale connected to in situ measured microclimate
Růžičková, Anna ; Man, Matěj (advisor) ; Marková, Ivana (referee)
The life of bryophytes is closely connected with their surrounding environment. Changes in atmospheric conditions on the microscale directly affect the physiological functions of bryophytes, which in turn determine their distribution. The current development of technologies allows us to measure the microclimate affecting bryophytes directly in the field. Nevertheless, there have not been many studies published examining the response of bryophytes to in situ measured microclimate. This diploma thesis is one of the first in Europe to provide data from continuous field microclimatic measurement performed on a scale relevant to bryophytes. It deals with the influence of the microclimate on the bryophyte species richness and community composition within a single gorge in the Bohemian Switzerland National Park. For 17 months, 38 HOBO Pro v2 Onset dataloggers were recording air temperature and air humidity 10 cm above the ground. I performed detailed bryological survey on two differently sized plots (circle with a radius of 1 or 2 m) around each of the dataloggers. The microclimate is influenced by the topography and character of the vegetation, therefore I derived topographical data from a digital terrain model (resolution of 1 m), calculated the canopy openness using hemispherical photographs and...
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Methodology for predictive mapping of rare and endangered bryophytes distribution in the Czech Republic
Man, Matěj ; Wild, Jan
The methodology introduced certified procedure of using species distribution modelling to support discovery of new localities with presence of rare species of bryophytes and lichens in Czech Republic. The procedure available for general public, it provides algorithms, computation power and environmental data. User provides training data – coordinates of species presence. From the software interface it is also possible to request the coordinates directly from Database of Lichens and Bryophytes (DaLiBor). Georeferenced map is the output form the software. The aim of the methodology is to provide integrated tool for conservation planning and research to promote the bryological and lichenological field survey in Czech Republic. The methodology will help to focus the survey which could make the survey more efficient and cheaper according to money but also human resources. The methodology is based exclusively on free software, mostly open source and free licence. In the Czech Republic, the methodology provides modern software approach to target botanical research. In national practical nature conservation, it is all new application of established procedure from other fields.\n
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Predictive distribution modelling of selected bryophyte species in Bohemian Switzerland National Park
Procházková, Martina ; Man, Matěj (advisor) ; Moudrý, Vítězslav (referee)
The aim of this thesis was to create potential distribution models for Dicranum majus (Greater Fork Moss) and Polytrichum alpinum (Alpine Haircap) in Bohemian Switzerland National Park. In the Czech Republic these bryophyte species occur in cold climatic regions typically with higher altitudes. In Bohemian and Saxon Switzerland they can occur in really low altitudes thanks to unique microclimatic conditions of deep inversion ravines. These bryophyte species had low number of occurence records in studied area before the start of my research (4 occurence localities for Dicranum majus, 8 occurence localities for Polytrichum alpinum). Predictive habitat suitability models can be an effective tool for selecting potential new occurence localities, planning field research or management design. During field research I recorded 34 new occurence localities for Dicranum majus and 29 new occurence localities for Polytrichum alpinum in Bohemian Switzerland National Park. I used 8 topographic parameters derived from digital elevation model with 1 m resolution as environmental data. Using these data I created models of potential distribution of the most suitable habitats for both species with algorithms Artificial neural networks (ANN), Generalised linear model (GLM) and Random forest (RF). RF algorithm had the...
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Microclimate as a driver of species distribution and community composition of bryophytes compared with lichens
Růžičková, Anna ; Man, Matěj (advisor) ; Starosta, Jakub (referee)
This bachelor thesis deals with the influence of microclimate on species distribution and composition of bryophyte and lichen communities. It defines the term microclimate, characterizes the specific properties of bryophytes responsible for their sensitivity to microclimatic conditions and includes a comparison of the role of individual microclimatic factors in controlling the distribution of bryophytes and lichens. The key microclimatic factors for bryophytes are humidity and air temperature, but the significance of each varies between functional groups of species and depending on the type of biome. With the available portable measuring devices with large battery capacity and memory storage, it is now possible to measure in-situ microclimate for the long-term and also with high spatial and temporal resolution. Despite that, there are currently only 12 bryological studies that provide continuously measured field microclimatic data on small spatial scales. The main part of the thesis summarizes these studies and compares the methodologies used. The paper can serve as a starting material for designing bryological microclimatic studies.
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