Plant Formation

Plant Formation

 

a group of plant associations whose main strata consist of the same species (for example, all associations in which meadow foxtail or Scotch pine is dominant). A plant formation can include genetically and ecologically different associations. For example, a formation of Scotch pine forests can embrace sphagnum pine groves and pine groves with plants typical of broad-leaved forests. Hence, some modern geobotanists use the term “plant formation” without any connotation of rank or taxonomic unit. The term was introduced by the German plant geographer A. Grisebach in 1838 and was used for a long time thereafter in a sense close to plant association or phytocoenosis. Plant associations are usually combined into classes.

References in periodicals archive ?
The contract is for the production of Rgfor (hereinafter referred Rgfor Step1) at reduced to five types of plant formation nomenclature, from an image segmentation provided by IGN.
They may contain more than a single plant formation (dominant vegetation of similar structure) and hence more than one biome (animals plus plants determined by vegetation structure), so it is important to utilize these smaller landscape units when discussing transitional biogeography.
These were a) percentages of eastern and western species among the reptiles, birds, and mammals, six variables per county; b) percentages of each plant formation plus the eastern and western range-limited species, five variables per county; and c) percentages of each plant formation and vertebrates per plant association, six variables per county.
2) Which plant formation is most influential in limiting species?
The analysis employing plant formation and range limits data reveals a more complex landscape pattern (Fig.
1990) and not whole landscapes, I shall provide a broader quantitative study of distributional patterns, employing plant formations and all classes of terrestrial vertebrates.
This region was chosen, because it is a representative cross-section of the three major plant formations in central Texas--deciduous forest, tallgrass prairie, and evergreen woodland from east to west (Fig.
Extent of the three plant formations in each county was calculated with a plainmeter, using maps by Beaty and Gehlbach (1975) and McMahan et al.
1) and contain the most similar proportions of all three plant formations (Table 2).
A limited concordance of vertebrate assemblages and plant formations is shown in the third analysis (Fig.
His work is characterised by the recurrence of themes and ideas constantly associated with related visual motifs and symbols: the female form, the arabesque, rock and plant formations, seed-pod and flower, sun and moon.