Therefore, future taxonomic revisions of Triassic anomodonts might reveal an actually decreased richness when compared to this study.
Another notable finding in this study was that just a slight temperature increase of 5 °C had major influence on microbial community structure, including considerably decreased richness and evenness of methanogenic and acetogenic communities.
However, when a stable (stochastic) environment faces a disturbance, it changes to a deterministic one, and the better adapted competitors begin to dominate, what is usually reflected by a decreased richness and diversity.
Fecal microbiota alpha diversity and richness (e.g., number of different taxa) were not associated with CRA in our study, whereas one study reported decreased richness in feces from CRC cases (Ahn et al., 2013) and another reported increased richness in unaffected mucosa from CRA cases (Sanapareddy et al., 2012).
For example, 16S rRNA gene sequence analysis of the entire community revealed that the administration of ciprofloxacin to humans affected the majority of bacterial taxa in the gut, resulting in decreased richness (membership), diversity (membership and abundance), and evenness (numerical distribution of the members).
Our data suggest that on the Cumberland Plateau birds are affected by landscape configurations at multiple spatial scales, with large-scale landscape disturbance decreasing species richness and smaller-scale fragmentation increasing species richness.
Studies since this early work have reported varying results such as increased species richness at mid latitudes and also towards the equator or decreasing species richness towards the equator [5], [16], [22], [23].
We hypothesized that soil animal and microbial communities were increasingly disturbed along this gradient, resulting in decreasing species richness and decreasing abundance of most sensitive species groups.
(Pstipa) by 61.53%, and decreasing species richness (Rsp) by 30.70%, cover by 21.87%, aboveground biomass (AGB) by 31.34%, and carbon allocation (the ratio of ANPP/BNPP) by 15.18%.
