A5020329738- Ecology and Vegetation Dynamics Studies
- Species Distribution and Climate Change
- Plant and animal studies
- Animal Ecology and Behavior Studies
- Isotope Analysis in Ecology
- Geology and Paleoclimatology Research
- Mollusks and Parasites Studies
- Pleistocene-Era Hominins and Archaeology
- Marine and environmental studies
- Botany and Plant Ecology Studies
Charles University
2008-2018
Czech Academy of Sciences
2018
The frequency distribution of species abundances [the abundance (SAD)] is considered to be a fundamental characteristic community structure. It almost invariably strongly right-skewed, with most being rare. There has been much debate as its exact properties and the processes from which it results. Here, we contend that an SAD for study plot must viewed spliced SADs many smaller nonoverlapping subplots covering plot. We show this splicing, if applied repeatedly produce progressively larger...
The species-area relationship (SAR) is considered to be one of a few generalities in ecology, yet universal model its shape and slope has remained elusive. Recently, Harte et al. argued that the SAR for given area driven by single parameter, ratio between total number individuals species (i.e., mean population size across at scale). We provide geometric interpretation this dependence. At same time, however, we show dependence cannot taxa: if it holds taxon composed from two subsets also...
Abstract There have been several attempts to build a unified framework for macroecological patterns. However, these mostly based either on questionable assumptions or had be parameterized obtain realistic predictions. Here, we propose new model explicitly considering patterns of aggregated species distributions multiple spatial scales, the property which lies behind all patterns, using idea term ‘generalized fractals’. Species’ were modelled by random hierarchical process in original...
Common species have a greater effect on observed geographical patterns of richness than do rare ones. Here we present theory the relationship between individual occurrence and in richness, which allows purely geometrical statistical causes to be distinguished from biological Relationships occupancy correlation with overall are driven by frequency distribution among sites. Moreover, generally positive relationships promoted fact that distributions mostly right skewed. However, processes can...
Abstract Aim Projections of human impact on the environment and biodiversity patterns are crucial if we to prevent their destruction. Such projections usually involve assumption that same activities always affect in way, either geographically distant areas within time‐scale or different periods. In this paper, plant snail fossils from central Europe cover last 12,000 years provide evidence against assumption. Location Central Europe. Methods We examined fossil data European plants snails...
Abstract Sometimes, we stumble over literature revealing that well‐known and groundbreaking theories have previously been proposed by earlier researchers. Going back to the 1920s a group of Nordic botanists, discovered they had already accomplished much what theoretical ecologists biographers, especially Americans, did half century later. In order restore their legacy understand why work early spatial in Scandinavia Finland was forgotten, examined publications, recalculated some results from...
Up‐scaling species richness from local to continental scales is an unsolved problem of macroecology. Macroecologists hope that proper up‐scaling can uncover the hidden rules underlie spatial patterns in richness, but a machinery up‐scale also has purely practical side at and for habitats where direct observations cannot be performed. The species–area relationship (SAR) could provide tool up‐scaling, no valid method yet been put forward. Such would have resulted Storch et al.'s (2012)...
This paper presents the most interesting findings from inventory surveys of small-scale protected areas in Český les PLA 2020 and 2021. The total number mollusc species has increased by two wetland species, Vertigo angustior V. antivertigo. Several localities have been added to single site Nesovitrea petronella until recently undifferentiated slug Arion obesoductus. In some reserves results can be compared with previous surveys, three others we present first data on occurrence molluscs.