Prediction of yield in the Rothamsted Park Grass Experiment by Ellenberg indicator values

1997 ◽  
Vol 8 (4) ◽  
pp. 579-586 ◽  
Author(s):  
M.O. Hill ◽  
P.D. Carey
Keyword(s):  
Ellenberg Indicator Values ◽  
Indicator Values ◽  
Park Grass Experiment

scholarly journals Root anatomy predicts ecological optima in Carex (Cyperaceae) in terms of Ellenberg indicator values

2021 ◽  
Vol 129 ◽  
pp. 107979
Author(s):  
Matthias H. Hoffmann ◽  
Sebastian Gebauer ◽  
Raoul Lühmann
Keyword(s):  
Root Anatomy ◽  
Ellenberg Indicator Values ◽  
Indicator Values

scholarly journals Tendency and distribution indices for ordinal variables applied to Ellenberg indicator values

2013 ◽  
Vol 70 (2) ◽  
pp. 248-256 ◽  
Author(s):  
Miguel Alvarez ◽  
Bodo Maria Mõseler ◽  
Cristina San Martín
Keyword(s):  
Ellenberg Indicator Values ◽  
Indicator Values ◽  
Ordinal Variables

scholarly journals The evolution of natural floodplain forests in South Moravia between 1973 and 2005

2008 ◽  
Vol 54 (No. 8) ◽  
pp. 340-354 ◽  
Author(s):  
P. Unar ◽  
P. Šamonil
Keyword(s):  
Forest Ecosystems ◽  
Woody Species ◽  
Limiting Factor ◽  
Herb Layer ◽  
Ellenberg Indicator Values ◽  
Indicator Values ◽  
Management Measures ◽  
South Moravia ◽  
The Impact ◽  
The Given

Since the mid-1970’s, the landscape around the confluence of the Morava and Dyje rivers has undergone substantial changes related to the drop of water table caused by water management measures undertaken on both ri-vers. Periodical spring floods are among the phenomena lost due to ameliorations. In this study, the reaction of forest ecosystems to the decrease in soil moisture is assessed on the basis of changes in species composition of the herb layer as well as of the known requirements of individual recorded taxa and the entire herb synusiae for the water content of soils. The results confirm that the species with the greatest demand for water disappear over time. The tendency of decreasing Ellenberg indicator values of the herb layers within the phytocoenological relevés is obvious also with the consideration of the influence of different numbers of species recorded on the same plots in different years of the survey. The changes are most visible in the dampest habitats, while elevated sites, so-called “hrudy”, tend to be most stable. The intensity of vegetation changes increases in direct proportion to the altitude of the sites. The process of changes in some habitats caused by the alteration of the water regime has to be separated from the changes in the vegetation structure, which are easier to observe optically. The limiting factor of their development in the given conditions is the forest wildlife. After the elimination of wildlife’s influence, the woody species synusia differentiates in height. A qualitative shift is represented by the recession of the formerly dominant <I>Quercus robur</I> on the main level, and its gradual replacement by other species. The impact of changes going on in the woody synusia on selected characteristics of the herb layer are included in the analyses.

scholarly journals Phytosociological Data in Assessment of Anthropogenic Changes in Vegetation of Rzeszów Reservoir

2021 ◽  
Vol 13 (16) ◽  
pp. 9071
Author(s):  
Maria Ziaja ◽  
Tomasz Wójcik ◽  
Małgorzata Wrzesień
Keyword(s):  
Environmental Variables ◽  
Vegetation Type ◽  
Plant Distribution ◽  
Vegetation Types ◽  
Ellenberg Indicator Values ◽  
Indicator Values ◽  
Marsh Vegetation ◽  
Se Poland ◽  
Main Factor

Phytosociological research on aquatic and marsh vegetation was conducted in Rzeszów Reservoir (SE Poland): 134 relevés according to the Braun-Blanquet method were collected there in 2016 and compared to 91 relevés published in 1994 (225 relevés in total). Changes in vegetation type, diversity measures, species composition, and Ellenberg Indicator Values (EIVs) for light, moisture, reaction, and nitrogen were analysed. Over the 22 years (1994–2016), the greatest changes were noted in communities of the classes Lemnetea and Potametea and the alliance Salicion albae. The long-term observations demonstrated the disappearance of 14 phytocoenoses and the occurrence of 12 new ones. An expansion of marsh communities (Typhetum latifoliae, Typhetum angustifoliae, Glycerietum maximae, Leersietum oryzoidis) was noted, causing a decline of several species and vegetation types. According to canonical correspondence analysis (CCA), four environmental variables (light, moisture, nitrogen, and pH) were related to plant distribution. The strong disturbances reflected in intensive eutrophication were due to human activity, which is the main factor shaping the ecological succession and overgrowing of the reservoir.

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