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Journal articles on the topic "Ellenberg indicator value"
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Ostrowski, Grzegorz, Severin Aicher, Agnieszka Mankiewicz, et al. "Mean ecological indicator values: use EIVE but no cover-weighting." Vegetation Classification and Survey 6 (March 26, 2025): 57–67. https://doi.org/10.3897/VCS.134800.
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Aims: To test the predictive power of mean ecological indicator values (EIVs) based on different EIV systems and weighting approaches. Study area: Preda in Grisons, Switzerland. Methods: We used three regional datasets of vegetation plots accompanied with measured soil pH values or mean annual near soil air temperature. We calculated mean EIVs for each plot with four EIV systems that cover the region, namely "Ellenberg", "Landolt", "Tichý" and the Ecological Indicator Values for Europe (EIVE), combined with four weighting approaches (unweighted, cover-weighted, square-root cover-weighted, inverse niche width weighted). We correlated the mean EIVs of each combination with the measured environmental variables and compared the mean Pearson <i>r</i> values. Results: No cover-weighting (0.78) was slightly better than square-root cover-weighting (0.75) and clearly better than full cover-weighting (0.68). In the two EIV systems providing a niche width measure (EIVE and "Landolt"), inverse niche weighting gave similar results than no weighting. Mean EIVE values (0.76) had significantly stronger correlations than "Tichý" (0.73), while the differences to "Ellenberg" (0.75) and "Landolt" (0.71) were not significant. Conclusions: The results suggest that even within the definition areas of two long-established EIV systems ("Ellenberg", "Landolt"), EIVE gives at least as good predictions as these and significantly better than "Tichý". Likewise, any type of cover-weighting reduces the predictive power of mean EIVs. Both findings could be the consequence of the statistical principle "wisdom of the crowd", according to which the average estimate of several sources (be it regional scientists or plant species) is usually better than the estimate of one or few experts. Accordingly, EIVE currently is the best choice for mean EIVs in Europe, and no cover-weighting should be applied. We recommend that similar studies should be undertaken in other regions and for other niche dimensions. Syntaxonomic reference: Mucina et al. (2016). Abbreviations: EIV = ecological indicator value; EIVE = Ecological Indicator Values for Europe 1.0; R = ecological indicator value for soil reaction; T = ecological indicator value for temperature.
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Ostrowski, Grzegorz, Severin Aicher, Agnieszka Mankiewicz, et al. "Mean ecological indicator values: use EIVE but no cover-weighting." Vegetation Classification and Survey 6 (March 26, 2025): 57–67. https://doi.org/10.3897/vcs.134800.
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Aims: To test the predictive power of mean ecological indicator values (EIVs) based on different EIV systems and weighting approaches. Study area: Preda in Grisons, Switzerland. Methods: We used three regional datasets of vegetation plots accompanied with measured soil pH values or mean annual near soil air temperature. We calculated mean EIVs for each plot with four EIV systems that cover the region, namely “Ellenberg”, “Landolt”, “Tichý” and the Ecological Indicator Values for Europe (EIVE), combined with four weighting approaches (unweighted, cover-weighted, square-root cover-weighted, inverse niche width weighted). We correlated the mean EIVs of each combination with the measured environmental variables and compared the mean Pearson r values. Results: No cover-weighting (0.78) was slightly better than square-root cover-weighting (0.75) and clearly better than full cover-weighting (0.68). In the two EIV systems providing a niche width measure (EIVE and “Landolt”), inverse niche weighting gave similar results than no weighting. Mean EIVE values (0.76) had significantly stronger correlations than “Tichý” (0.73), while the differences to “Ellenberg” (0.75) and “Landolt” (0.71) were not significant. Conclusions: The results suggest that even within the definition areas of two long-established EIV systems (“Ellenberg”, “Landolt”), EIVE gives at least as good predictions as these and significantly better than “Tichý”. Likewise, any type of cover-weighting reduces the predictive power of mean EIVs. Both findings could be the consequence of the statistical principle “wisdom of the crowd”, according to which the average estimate of several sources (be it regional scientists or plant species) is usually better than the estimate of one or few experts. Accordingly, EIVE currently is the best choice for mean EIVs in Europe, and no cover-weighting should be applied. We recommend that similar studies should be undertaken in other regions and for other niche dimensions. Syntaxonomic reference: Mucina et al. (2016). Abbreviations: EIV = ecological indicator value; EIVE = Ecological Indicator Values for Europe 1.0; R = ecological indicator value for soil reaction; T = ecological indicator value for temperature.
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Wamelink, Wieger G. W., and Han F. van Dobben. "Uncertainty of critical loads based on the Ellenberg indicator value for acidity." Basic and Applied Ecology 4, no. 6 (2003): 515–23. http://dx.doi.org/10.1078/1439-1791-00211.
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Renata, Duffková, and Brom Jakub. "Plant composition, herbage yield, and nitrogen objectives in Arrhenatherion grasslands affected by cattle slurry application." Plant, Soil and Environment 64, No. 6 (2018): 268–75. http://dx.doi.org/10.17221/178/2018-pse.
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Cattle slurry is commonly used to fertilize grasslands, so its impact on plant composition and herbage properties is important. Cattle slurry at annual rates of 60 (S1), 120 (S2), 180 (S3), and 240 kg nitrogen (N)/ha (S4) was applied to Arrhenatherion grasslands in moderately wet (WS), slopy (SS), and moderately dry (DS) sites cut three times a year over six years, to assess its effects on plant functional types, the Ellenberg N indicator value (Ellenberg N), herbage dry matter (DM) yield, herbage N content and offtake, N nutrition index (NNI), and N use efficiency (NUE). The site-specific changes in an increase in graminoid cover, Ellenberg N, herbage DM yield and N offtake, and NNI along with slurry application rates revealed, while cover of legumes, short forbs, and NUE decreased. In more productive sites (WS and SS), slurry application in the amount of 180 kg N/ha could be suggested as a slurry dose ensuring beneficial agronomic objectives. However, nature conservation requirements via maintaining plant biodiversity were not met. On the contrary, short-term slurry application up to 120 kg N/ha ensured on permeable DS not only sufficient agronomic objectives, but also plant biodiversity conservation requirements.
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Robbins, Jane A., and John A. Matthews. "Use of ecological indicator values to investigate successional change in boreal to high-alpine glacier-foreland chronosequences, southern Norway." Holocene 24, no. 11 (2014): 1453–64. http://dx.doi.org/10.1177/0959683614544067.
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Mean weighted Ellenberg indicator values were calculated for vegetation recorded from four successional stages on 39 glacier forelands in the Jostedalsbreen and Jotunheimen regions of southern Norway. The sites ranged in altitude from 80 to 1860 m a.s.l. Results revealed a trend of decreasing mean indicator values for light, reaction and nitrogen on successively older terrain. Mean indicator values for moisture did not show a consistent pattern of variation according to successional stage. When stratified according to altitude, sub-alpine and boreal sites showed the most rapid decrease in pH and productivity levels through time. Within this altitudinal zone, mean values after 70 years of succession were already indistinguishable from those for the mature vegetation. At higher altitudes, in the alpine zone, a more gradual decrease was detected but culminated in similar values. A significant trend in decreasing indicator values for light with succession was found at all except the high-alpine sites where the value for mature vegetation was not significantly different from that for earlier stages. Also evident was the greater decrease in mean value for light at the lowest altitudes, reflecting the establishment of a birch-woodland canopy. Use of snowmelt indicators improved interpretation of the differences between late-successional stages according to altitude. Variance partitioning revealed that differences between successional stages accounted for 29% of the variation in mean indicator values, whereas altitude accounted for an additional 12%. Indicator values have provided a useful comparison of rates of succession and associated vegetation development within different altitudinal zones, inferring possible mechanisms of change at a regional scale.
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OREDSSON, ALF. "The Ellenberg index of temporal change in vascular plants (Änderungstendenz) tested in southern Sweden." Environmental Conservation 27, no. 3 (2000): 225–28. http://dx.doi.org/10.1017/s0376892900000254.
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In Sweden, public awareness of change in the environment has increased in recent decades (Gillberg 1999). An important tool which contributed to an understanding of how the flora is affected by changes in the environment was created by Ellenberg (1974). Six ecological factors, namely light, temperature, continentality, moisture, reaction and nitrogen, were each divided into 9 (in the case of moisture 12) so-called indicator values. A species given a low value occurs mainly where the factor is less pronounced, and vice versa, species in light class 1 prefer full shadow, 5 half shadow, and 9 full light.
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Erzfeld, Lukas, Hannes Feilhauer, Mathias Scholz, and Timo Hartmann. "Patterns of plant species composition of a temperate floodplain meadow in response to fine-scale topography." ERDKUNDE 78, no. 4 (2025): 303–19. https://doi.org/10.3112/erdkunde.2024.04.04.
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Floodplains are vital and diverse habitats, providing essential ecosystem services. In Germany, the total surface of floodplain meadows has decreased by over 80% since the 1950s due to human activities such as river channelisation and embankment as well as land use intensification, leading to changes in nutrient and pollutant input. However, effects of these changes on floodplain vegetation remain understudied, primarily due to their recent occurrence. Here we investigate the effects of terrain elevation, flow distance to permanent water bodies (rivers and clay ponds), groundwater-surface distance and thickness of the alluvial clay layer on the plant species composition of the floodplain meadows ‘Papitzer Lachen’ in Northwest Saxony, Germany. We make use of the Ellenberg indicator system to approach statistical results from an ecological point of view. We recorded the vegetation species composition on 20 relevés of 10 m x 10 m (100 m2) each across different floodplain meadow types along an elevation gradient. We classified the plant communities phytosociologically. In addition, we performed an ordination of the plots (detrended correspondence analysis, DCA) and compared the resulting axes to environmental variables using Pearson’s correlation coefficient. As abiotic factors, we used the elevation of each plot measured via DGPS in the field, least cost path to the next water body derived from a digital elevation model, groundwater-surface distance as well as thickness of the alluvial clay layer. We calculated the mean weighted Ellenberg indicator moisture value for each plot and compared it to the DCA results. Three of the stands were classified as Scutellario-Veronicetum longifoliae Walther 1955, eleven as Arrhenatheretum elatioris Braun 1915 and six as a Silaum-silaus-community. The relevés could be roughly separated in two groups along the first DCA axis. The first DCA axis showed significant correlations (p < 0.05) with ground elevation (r = –0.54) and alluvial clay layer thickness (r = –0.68) but no significant correlations with groundwater-surface distance and proximity to water bodies. The weighted mean Ellenberg indicator moisture values significantly correlate with distance to groundwater table (r = –0.59) and confirm a moisture gradient. The main explanatory variable for variation in the vegetation appears to be hydrology. However, variability in water levels which is typical for floodplains has declined. Main reasons are a smaller amplitude of water levels due to river regulation and long periods of droughts. This underlines the strong anthropogenic influence on floodplains. As floodplains are, especially due to their dynamic hydrology, particularly species-rich ecosystems, this study helps to document and understand this diversity to support a conservation value.
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LaPaix, Richard, Bill Freedman, and David Patriquin. "Ground vegetation as an indicator of ecological integrity." Environmental Reviews 17, NA (2009): 249–65. http://dx.doi.org/10.1139/a09-012.
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Indicators are being sought for monitoring the ecological integrity of forests and other kinds of ecosystems. Biological measures are commonly used as indicators because of their inherent ecological importance and ability to provide insight into environmental change. Such measures are commonly based on data from sets of permanent plots in which the abundances of plant species are monitored. However, the data may be difficult to interpret, especially if corresponding information on natural and anthropogenic stressors is lacking. In this review, we examine general principles of indicator use and discuss the types of plot-based compositional measures obtained from vegetation that may be most relevant for monitoring ecological integrity. Our focus is on the ground vegetation of forested ecosystems, but the principles discussed are relevant to other vegetation types. Individual plant species, guilds, aliens, diversity indices, Ellenberg indicator values, the floristic quality assessment index, multivariate and multimetric indicators are examined, as well as concepts of threshold changes and the need for reference states. The usefulness of any given approach tends to be highly context specific. In particular, the value of using individual species as indicators is highly dependant on factors such as the character of the floristic community of interest and the types and intensities of anthropogenic stressors. Alien species are considered to be especially valuable indicators of changes in ecological integrity due to their established relationships with anthropogenic stressors, known historical state, relevance to all floristic communities, and ability to cause undesirable changes to biodiversity and ecological processes.
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Karrer, Gerhard. "Ökologische Zeigerwerte der Gefässpflanzen Österreichs." STAPFIA 117, no. 1 (2024): 1–146. http://dx.doi.org/10.2478/stapfia-2024-0001.
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Abstract Ecological indicator values for Austrian vascular plants. Ecological indicator values of plants serve as indirect indicators for the status of ecological parameters in absence of physico-chemical measurements at place. Ellenberg introduced seven parameters which are namely light (L), temperature (T), continentality (K), moisture (F), reaction (R), nutrients (N), and salt (S), to define optima of plant growth under natural conditions along gradients scaled to nine levels. The moisture gradient is even extended to twelve levels and additional codes give information about the tolerance of facultative flooding or seasonal drought. Species that lack distinct optima and are present over a zone of more than four levels of the respective gradients are called indifferent (i). Plants that show optima situated towards both ends of the scale for parameters M and R are classified as bimodal (b) for the first time in national records of indicator values. Broad amplitudes and indistinct optima of species presences along the scales are not indicated separately due to the lack of available data. For 4902 vascular plants we provide indicator values that are valid for the Republic of Austria (holds for L, T, F, R, N, S). The values for continentality (K) consider the whole distribution area of the species. Comparisons with indicator value systems from neighboring countries show some shifts in the number of species assigned to the indicator levels but the histograms do not differ very much. Apparently, such shifts depend on the length of the ecological gradients available in the respective region but also on the regional pool of species and subspecific ecotypes.
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Dengler, Jürgen, Florian Jansen, Olha Chusova, et al. "Ecological Indicator Values for Europe (EIVE) 1.0." Vegetation Classification and Survey 4 (January 13, 2023): 7–29. https://doi.org/10.3897/VCS.98324.
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Aims: To develop a consistent ecological indicator value system for Europe for five of the main plant niche dimensions: soil moisture (M), soil nitrogen (N), soil reaction (R), light (L) and temperature (T). Study area: Europe (and closely adjacent regions). Methods: We identified 31 indicator value systems for vascular plants in Europe that contained assessments on at least one of the five aforementioned niche dimensions. We rescaled the indicator values of each dimension to a continuous scale, in which 0 represents the minimum and 10 the maximum value present in Europe. Taxon names were harmonised to the Euro+Med Plantbase. For each of the five dimensions, we calculated European values for niche position and niche width by combining the values from the individual EIV systems. Using T values as an example, we externally validated our European indicator values against the median of bioclimatic conditions for global occurrence data of the taxa. Results: In total, we derived European indicator values of niche position and niche width for 14,835 taxa (14,714 for M, 13,748 for N, 14,254 for R, 14,054 for L, 14,496 for T). Relating the obtained values for temperature niche position to the bioclimatic data of species yielded a higher correlation than any of the original EIV systems (r = 0.859). The database: The newly developed Ecological Indicator Values for Europe (EIVE) 1.0, together with all source systems, is available in a flexible, harmonised open access database. Conclusions: EIVE is the most comprehensive ecological indicator value system for European vascular plants to date. The uniform interval scales for niche position and niche width provide new possibilities for ecological and macroecological analyses of vegetation patterns. The developed workflow and documentation will facilitate the future release of updated and expanded versions of EIVE, which may for example include the addition of further taxonomic groups, additional niche dimensions, external validation or regionalisation. Abbreviations: EIV = Ecological indicator value; EIVE = Ecological Indicator Values for Europe; EVA = European Vegetation Archive; GBIF = Global Biodiversity Information Facility; i = index for taxa; j = index for EIV systems; L = ecological indicator for light; M = ecological indicator for moisture; N = ecological indicator for nitrogen availability; R = ecological indicator for reaction; T = ecological indicator for temperature.
Dissertations / Theses on the topic "Ellenberg indicator value"
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Galin, Isolde. "How former arable fields with permanent grazing differ from managed semi-natural pastures in Sweden." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-158072.
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New farming needs and innovations have, over time, led to changes in land use. Arable fields have been turned into pastures and semi-natural pastures into arable fields. Due to the ecological value of continually grazed semi-natural pastures in Sweden the aim of this study is to find out how former arable fields that are permanently grazed differ from semi-natural pastures. In this study I selected appropriate semi-natural pastures from a national monitoring program on seminatural- pastures and meadows. Plots continuously grazed were compared with grazed plots on former arable fields. Pair-wise differences in the Ellenberg indicator values Light (L), Soil moisture (F), soil pH (R) and soil nitrogen (N), vertical coverage of trees, bushes and vegetation, species richness and species composition were tested. Except for species composition there were only small differences between former arable fields that are permanently grazed and semi-natural pastures. That means former arable fields can with time and grazing gain many of the values continuously grazed semi-natural pastures have.
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Laitinen, J. (Jarmo). "Vegetational and landscape level responses to water level fluctuations in Finnish, mid-boreal aapa mire – aro wetland environments." Doctoral thesis, University of Oulu, 2008. http://urn.fi/urn:isbn:9789514288791.
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Abstract
Gradient, which is largely considered to be related to water level in mires, is referred to as a microtopographic mud bottom to carpet to lawn to hummock level gradient or the hummock level to intermediate level (lawn) to flark level gradient. The relationship of this vegetation gradient to various physical water level characteristics was studied.
The general classification used in the present summary paper divides the aro vegetation of the inland of Northern Ostrobothnia into two main groups: (a) treeless fen aro vegetation (Juncus supinus, Carex lasiocarpa, Rhynchospora fusca, Molinia caerulea) and (b) heath aro vegetation (Polytrichum commune). The first group (a) was divided into fen aro wetlands with an approximately10 cm peaty layer at most and into aro fens with a peat layer thicker than 10 cm.
The treatment of the water level gradient was divided into three main groups. (1) The mean water level correlated with mire surface levels (microtopographic gradient) within mires with slight water level fluctuations and partly within mires with considerable water level fluctuations. (2) Three habitat groups could be distinguished on the basis of the range of water level fluctuation i.e. mires with slight water level fluctuations, mires with considerable water level fluctuations and the aro vegetation with extreme water level fluctuations. (3) The timing of water level fluctuations indicated that there are different types of patterns within aro wetlands, the seasonal pattern being mainly a response to yearly snow melt and the several-year-fluctuation pattern being related to the regional groundwater table fluctuation in mineral soils (heath forests). A link was suggested between the stability of the water regime and peat production in local aapa mire – aro wetland environments. From the point of view of peatland plants the direction of variation from a stable to an unstable water regime in aapa mire – aro wetland environments represents a transition towards more and more harsh ecological conditions, partly forming a gradient through natural disturbance.
A qualitative functional model was provided for the mire – aro wetland systems of Northern Ostrobothnia. The model supposes differences in the characteristics of peat between two functional complexes within a mire system. Finally, the model for local mire – aro wetland systems was converted to a general from: diplotelmic (acrotelm) mires were divided into two subtypes (diplotelmic water stabilization mires, diplotelmic water fluctuation mires) and the relationship of those subtypes to percolation mires and seasonal wetlands was considered.
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Bodin, Jeanne. "Observed changes in mountain vegetation of the Alps during the XXth century - Role of climate and land-use changes." Phd thesis, Université Henri Poincaré - Nancy I, 2010. http://tel.archives-ouvertes.fr/tel-00592144.
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La végétation herbacée est un bon indicateur des conditions environnementales. Pour cette raison, elle a souvent été utilisée pour mettre en évidence les changements environnementaux causés par les actions humaines, tels qu'eutrophisation, dépôts atmosphériques acides, changements de l'usage des sols ou de la pression d'herbivorie. Depuis peu, on s'intéresse aux effets des changements climatiques sur les écosystèmes en général, et sur la végétation en particulier. Le choix des zones d'étude s'est naturellement porté sur la montagne, car le gradient thermique induit par le relief (-0,56°C pour 100 mètres d'altitude) y est mille fois plus élevé qu'en plaine le long du gradient latitudinal. D'autre part, les zones de montagne sont soumises à une urbanisation et une pression agricole moindre qu'en plaine, limitant ainsi les obstacles à la migration des espèces. Ces deux arguments font des régions de montagne une zone privilégiée pour l'étude de la réponse migratoire précoce de la végétation aux changements climatiques. Jusqu'ici, les études effectuées se sont focalisées pour la plupart sur la limite supérieure des espèces, ou sur de petites zones géographiques, ou bien encore sur des zones où il est difficile de dissocier les effets du réchauffement de ceux des changements d'usage des sols, qui se produisent eux aussi à grande échelle. Une partie de cette thèse est consacrée aux milieux forestiers montagnards, dans lesquels l'effet du pastoralisme est réduit. D'autre part, une méthode basée sur la modélisation des changements de la réponse de la végétation au gradient d'altitude est développée, permettant le rééchantillonnage sur placettes non-permanentes, et ainsi d'étendre l'utilisation de données anciennes à des séries de relevés non géolocalisés. En s'appuyant sur cette méthode, deux caractéristiques de la végétation ont été analysées : la position de l'optimum d'espèces prises individuellement d'une part (données de l'Inventaire Forestier National dans les montagnes méditerranéennes du sud-est de la France), et les changements de la valeur indicatrice des communautés végétales d'autre part (vallée de la Maurienne, France). Par ailleurs, on a étudié les déplacements à long terme de la limite inférieure des espèces dans la vallée de la Bernina (Suisse), pour tester si la réponse des espèces en limite inférieure, peu étudiée jusque là, est identique à celle en limite supérieure de leur distribution. Enfin, on a étudié l'évolution de la flore d'une zone très localisée, mais par ailleurs protégée des migrations d'espèces par une large barrière physique constituée par deux glaciers (Nunatak Isla Persa, Bernina, Suisse) permettant de s'affranchir totalement des effets potentiels d'autres perturbations anthropiques concomitantes. Dans ces différentes études, les intervalles de temps entre chaque inventaire ou échantillonnage varient de 14 ans à un siècle. Chacun des cas étudiés montre une remontée des espèces en altitude : remontée moyenne de +12,6 m/décennie des optimums de 175 espèces forestières dans les montagnes méditerranéennes, communautés des forêts de Maurienne évoluant vers une végétation plus thermophile à une altitude donnée équivalent à une remontée moyenne de +29.6m/décennie, retrait de la limite inférieure des espèces en Bernina de +5,6 m/décennie, arrivée d'espèce d'étages inférieurs sur le nunatak Isla Persa. Mais d'autres phénomènes expliquant la réponse observée de la végétation sont clairement mis en cause dans cette étude : fermeture et maturation du couvert forestier relativement plus importante à basse altitude dans les montagnes méditerranéennes, eutrophisation importante de la végétation en vallée de la Maurienne probablement due à l'augmentation du trafic routier, probable fragmentation de l'habitat ou dispersion par les randonneurs en Bernina. Ces perturbations anthropiques directes jouent à des échelles de temps et d'espace comparables à l'effet anthropique indirect du changement climatique. Il est donc primordial de les prendre en compte dans les changements de végétation observés, avant de conclure à un effet du réchauffement climatique seul.
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KREJČÍ, Tomáš. "Biologie a stanovištní nároky ohroženého druhu stepníka Eresus moravicus (Araneae: Eresidae)v Česku." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-136692.
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The ladybird spider Eresus moravicus is one of our most endangered spiders. It is therefore necessary to know its habitat requirements and have at least basic knowledge of its biology to design an appropriate management to protect sites of its natural occurrence. Phytocenological analysis was made at each site and the outcomes were evaluated based on the Ellenberg´s indicator values. Also slope and exposure, litter layer and the quantity of rubbel were measured on the localities. Individuals were taken from burrows for the measurement of the prosoma length (investigation of the length of the life cycle). Exuviae were collected from the same burrows for measurement of the prosoma length. From these data the number of instars was determined. Prey remains were taken at most of those sites from 5?10 burrows and determined. Offsprings from several maternal burrows were taken, counted and weighted (research of fecundity of females). Weight of offsprings is important also in terms of their dispersion ability. The offsprings ability to balloon was investigated experimentally in laboratory conditions. The ladybird spider Eresus moravicus occurs in warm regions with high intensity of irradiation, mostly on the southern and southwestern slopes. Sites are characterized by poor herbaceous vegetation without trees and shrubs and by a thin layer of humus. Female lives for four years and the male for three years. The number of instars can reach to 13. Beetles (Coleoptera) are the most importent prey, the importent component of food are ants (Formicidae), too. Eresus moravicus has more offsprings than Eresus sandaliatus and Eresus kollari, more eggs in the cocoon than E. kollari and heavier offsprings than E. kollari and E. sandaliatus. In offsprings of E. moravicus and E. kollari pre-ballooning behavior of two types was observed: "tip-toe" behavior and "drop and swing" behavior.
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Šimák, Martin. "Změny vegetace vlhkých luk ve Slavkovském lese." Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-386901.
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This thesis focuses on the changes of vegetation of the wet meadows in Slavkovský Les during past decade. It uses data on vegetation gained from 100 permanent plots. By the analysis of the species composition and diversity it aims to elucidate the changes of the wet meadows over the last ten years. It aims to define, which are declining and which are becoming more common. Applied management should have a great impact on the observed vegetation changes so its effect is studied in the thesis as well. The knowledge of the suitable management should lead to conservation of the local biodiversity. The abiotic environmental factors are important as well as they can influence the species composition. These factors were studied by the application of Ellenberg indicator values on the species present in the study. These changes were compared in time and in a combination of time with a management type. Thus, we should be able to say how the environment has changed in the past decade and whether the type of management has any effect on the changes. Furthermore, the thesis explores whether changes in species composition over time may be explained by species traits. The results indicate that the species diversity and composition have indeed changed during the past decade. Apparently, the higher amount of...
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MALÍKOVÁ, Lenka. "Adventivní odnožování krátkověkých rostlin v přírodních populacích." Doctoral thesis, 2011. http://www.nusl.cz/ntk/nusl-80026.
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Disturbance is one of most important selective factor causing removal of plant biomass. Man-made habitats are characterized by strong and unpredictable disturbances, providing bare soil surface colonized by plants with short life cycle. Populations of the short-lived plants are, however, vulnerable to the strong disturbance removing all stem parts with reserve axillary meristems in the case it occurs before plant flowering and fruiting. Nevertheless, 2 % of annual and 14 % of biennial plants are able to overcome meristem limitation by adventititous sprouting from hypocotyle or/and roots. This thesis is composed of four original studies describing the occurrence of adventitious sprouting in natural populations of 22 monocarpic weeds of Central Europe and one species in Indonesia. The studied phenomenon was analyzed in relation to various environmental factors and plant traits in the field and in experimental conditions.
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JÍROVÁ, Alena. "Vegetation succession in old fields at broad landscape scales." Doctoral thesis, 2012. http://www.nusl.cz/ntk/nusl-126779.
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This thesis is focused on succession in old fields in Central Europe. Repeated sampling, analysis of surrounding vegetation and soil measurements were conducted in the Bohemian Karst Landscape protected area. Samples from the Doupovské hory Mountains and the rest of the Czech Republic were added to discover basic principles of old field succession at the larger scale of landscapes.
Books on the topic "Ellenberg indicator value"
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Hill, M. O., and Heinz Ellenberg. Ellenberg's Indicator Values for British Plants (ECOFACT). The Stationery Office Books (Agencies), 2000.
Find full textBook chapters on the topic "Ellenberg indicator value"
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Ter Braak, Cajo J. F., and Niek J. M. Gremmen. "Ecological amplitudes of plant species and the internal consistency of Ellenberg’s indicator values for moisture." In Theory and models in vegetation science. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-4061-1_8.
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Wamelink, G. W. W., H. F. van Dobben, and L. J. M. van der Eerden. "Experimental calibration of Ellenberg's indicator value for nitrogen." In Nitrogen, the Confer-N-s. Elsevier, 1998. http://dx.doi.org/10.1016/b978-0-08-043201-4.50054-x.
Full textConference papers on the topic "Ellenberg indicator value"
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DUBROVSKIS, Edgars, Aigars INDRIKSONS, Olga MIEZĪTE, and Lelde HERMANE. "SUCCESSION OF GROUND COVER VEGETATION IN HYLOCOMIOSA FOREST SITE TYPE AFTER THE CLEARCUT." In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.110.
Full textAbstract:
Nowadays forestry sector uses forest site type descriptions developed from beginning of 20th century till 1980’s and descriptions are obtained for pre-mature and mature stand age. There is less information about ground cover vegetation for full rotation cycle. In this research has been gathered information about ground cover vegetation succession in first 5 years after clear cut in mature Scots pine stand. The chronosequence method was used. The Brown-Blanquet and the point-square methods for accounting of ground cover plants were used. The ecological values of Ellenberg for describing the environmental status and the coefficient of Tschekanovsky for estimation of the difference between plant communities in forest young growths of different age were used. The biological diversity of species in this research compared to mature stand also is increasing. Ellenberg’s ecological indicator values as light and nitrogen are also increasing: nitrogen value has increased the most - by 2.62 units. There are registered changes in vascular plants, mosses, lichens and trees projective covering’s proportion. The most significant changes in individual species occurrence are between the second and third year's (Tschekanovsky coefficient = 0.19). Five years after clear cut the Tschekanovsky coefficient between the mature stand and five years old clearing is 0.18. In the 4th and 5th year after the clear cut there increase the projective cover of Monocotyledonae plants (families Graminaea and Cyperaceae) forming higher vertical structure and overtaking the dominance from another groups. The results obtained in this research promote further research in different stand age.