scholarly journals Competitors and ruderals go to town: plant community composition and function along an urbanisation gradient

2021 ◽  
Vol 39 (4) ◽  
Author(s):  
Tanja K. Petersen ◽  
James D. M. Speed ◽  
Vidar Grøtan ◽  
Gunnar Austrheim
Keyword(s):  
Community Composition ◽  
Plant Community ◽  
Plant Community Composition ◽  
And Function ◽  
Urbanisation Gradient

scholarly journals Drought and Plant Community Composition Affect the Metabolic and Genotypic Diversity of Pseudomonas Strains in Grassland Soils

2021 ◽  
Vol 9 (8) ◽  
pp. 1677
Author(s):  
Claudia Breitkreuz ◽  
Thomas Reitz ◽  
Elke Schulz ◽  
Mika Tarkka
Keyword(s):  
Community Composition ◽  
Plant Community ◽  
Plant Growth Promoting Rhizobacteria ◽  
Genotypic Diversity ◽  
Structure And Function ◽  
Plant Community Composition ◽  
Highly Active ◽  
Plant Growth Promoting ◽  
Phosphate Solubilizing ◽  
And Function

Climate and plant community composition (PCC) modulate the structure and function of microbial communities. In order to characterize how the functional traits of bacteria are affected, important plant growth-promoting rhizobacteria of grassland soil communities, pseudomonads, were isolated from a grassland experiment and phylogenetically and functionally characterized. The Miniplot experiment was implemented to examine the mechanisms underlying grassland ecosystem changes due to climate change, and it investigates the sole or combined impact of drought and PCC (plant species with their main distribution either in SW or NE Europe, and a mixture of these species). We observed that the proportion and phylogenetic composition of nutrient-releasing populations of the Pseudomonas community are affected by prolonged drought periods, and to a minor extent by changes in plant community composition, and that these changes underlie seasonality effects. Our data also partly showed concordance between the metabolic activities and 16S phylogeny. The drought-induced shifts in functional Pseudomonas community traits, phosphate and potassium solubilization and siderophore production did not follow a unique pattern. Whereas decreased soil moisture induced a highly active phosphate-solubilizing community, the siderophore-producing community showed the opposite response. In spite of this, no effect on potassium solubilization was detected. These results suggest that the Pseudomonas community quickly responds to drought in terms of structure and function, the direction of the functional response is trait-specific, and the extent of the response is affected by plant community composition.

scholarly journals Incorporation of mineral nitrogen into the soil food web as affected by plant community composition

2021 ◽  
Author(s):  
Tanja Strecker ◽  
Annette Jesch ◽  
Dörte Bachmann ◽  
Melissa Jüds ◽  
Kevin Karbstein ◽  
...  
Keyword(s):  
Food Web ◽  
Community Composition ◽  
Plant Community ◽  
Mineral Nitrogen ◽  
Plant Community Composition ◽  
Soil Food Web

scholarly journals Plant community composition and species richness in the High Arctic tundra: From the present to the future

2017 ◽  
Vol 7 (23) ◽  
pp. 10233-10242 ◽  
Author(s):  
Jacob Nabe-Nielsen ◽  
Signe Normand ◽  
Francis K. C. Hui ◽  
Laerke Stewart ◽  
Christian Bay ◽  
...  
Keyword(s):  
Species Richness ◽  
Community Composition ◽  
Plant Community ◽  
Arctic Tundra ◽  
High Arctic ◽  
Plant Community Composition ◽  
The Future
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