In lineages that have successfully adapted to high-latitude environments, increased seasonal variability at higher latitudes is assumed to have resulted in broader thermal tolerances and consequently larger ranges: i. Fern assemblages, whose distribution and richness patterns are indeed mainly controlled by precipitation levels 414243were significantly more dissimilar due to nested patterns in the south than in the north, pointing to the exclusion of drought-intolerant species from the south. The anagenetic world of spore-producing land plants. Each variable define a possible driver for species richness patterns. Cornell HV Unsaturated patterns in species assemblages: the role of regional processes in setting local species richness. Investigating species richness SR patterns of European land plants, we determine whether SR increases with decreasing latitude, as predicted by theory, and whether the assembly mechanisms differ among taxonomic groups. Nonetheless, our results contrast with the suggestion of a consistent LDG pattern across geographic areas, scales, habitats and taxonomic groups 4567. Do stacked species distribution models reflect altitudinal diversity patterns?
PDF | We studied species richness and community composition as well as the vertical poikilohydric species capable of surviving dessiccation (Hietz and. Our prediction was that the generality of a temperature-related decline in species richness does not hold for poikilohydric plants such as mosses and liverworts.
The mossy north an inverse latitudinal diversity gradient in European bryophytes
Investigating species richness (SR) patterns of European land plants Simultaneously, because they are poikilohydric, they are much less well.
Cite chapter How to cite? Standard deviation of mean annual temperature. Hornworts are, however, a small group of only about species worldwide whose diversity pales in comparison to the much more diverse liverworts and mosses. The extent to which the similarity in the patterns displayed by spermatophytes and liverworts reflects a similar assembly mechanism remains, however, to be demonstrated.
While the evolutionary processes underlying the unique diversity of Mediterranean angiosperms have been thoroughly studied 39the evolutionary history of the highly specialized Mediterranean liverwort flora remains a large avenue of research to better understand how poikilohydric organisms may thrive and diversify in dry environments.
Partitioning the turnover and nestedness components of beta diversity. The higher levels of nestedness-resultant dissimilarity observed in northern spermatophytes compared with southern ones point, in turn, to the exclusion of species from northern areas, in support of our third hypothesis that the failure to evolve adaptations to cold climates is a key mechanism of the LDG in this group
Ground bryophyte species richness does not show any clear elevation distribution might be the poikilohydric properties of bryophytes . The phytophysiognomies that presented the highest species richness and the. number of chloroplasts according to the levels of light and are poikilohydric.
Such a pattern suggests that liverworts are the most sensitive group to the impact of past climate change, and in particular, to the higher levels of drought that characterized the glacial periods of the Quaternary and particularly affected frost- and drought-sensitive taxa Nature— Global moss diversity: spatial and taxonomic patterns of species richness.
Diversity patterns of ferns along elevational gradients in Andean tropical forests. To obtain comparable results for bryophytes and vascular plants, we further generated a potential richness S-SDM for ferns and spermatophytes see Supplementary Methods 1.
Video: Poikilohydric species richness Abundance, species richness, and diversity
In the mid-western islands of the Canaries, Madeira and Azores for example, congeneric endemic species generally result from the diversification of a single common ancestor in angiosperms cladogenetic speciationbut from several independent colonization events in bryophytes anagenetic speciation
Life on a tropical planet: niche conservatism and the global diversity gradient.
USA—94 National Center for Biotechnology InformationU. Biogeographica — Google Scholar. The potential richness generated by the S-SDM was then compared with the observed richness values for all the species available in this study see Supplementary Methods 2