Community dissimilarity of angiosperm trees reveals deep‐time diversification across tropical and temperate forests

2021 ◽  
Author(s):  
Buntarou Kusumoto ◽  
Yasuhiro Kubota ◽  
Andrés Baselga ◽  
Carola Gómez‐Rodríguez ◽  
Thomas J. Matthews ◽  
...  
Keyword(s):  
Temperate Forests ◽  
Deep Time ◽  
Time Diversification ◽  
Community Dissimilarity

scholarly journals Thirty clues to the exceptional diversification of flowering plants

2018 ◽  
Author(s):  
Susana Magallón ◽  
Luna L. Sánchez-Reyes ◽  
Sandra L. Gómez-Acevedo
Keyword(s):  
Rate Variation ◽  
List Type ◽  
Deep Time ◽  
Unequal Distribution ◽  
Angiosperm Evolution ◽  
Angiosperm Diversification ◽  
Temporal Placement ◽  
Time Diversification ◽  
Evolutionary Lineages

SummaryAs angiosperms became one of the megadiverse groups of macroscopic eukaryotes, they forged modern ecosystems and promoted the evolution of extant terrestrial biota. Unequal distribution of species among lineages suggests that diversification, the process which ultimately determines species-richness, acted differentially through angiosperm evolution.We investigate how angiosperms became megadiverse by identifying the phylogenetic and temporal placement of exceptional radiations, by combining the most densely fossil-calibrated molecular clock phylogeny with a Bayesian model that identifies diversification shifts among evolutionary lineages and through time. We evaluate the effect of the prior number of expected shifts in the phylogenetic tree.Major diversification increases took place over 100 Ma, from the Early Cretaceous to the end Paleogene, and are distributed across the angiosperm phylogeny. Angiosperm long-term diversification trajectory shows moderate rate variation, but is underlain by increasing speciation and extinction, and results from temporally overlapping, independent radiations and depletions in component lineages.The identified deep time diversification shifts are clues to identify ultimate drivers of angiosperm megadiversity, which probably involve multivariate interactions among intrinsic traits and extrinsic forces. An enhanced understanding of angiosperm diversification will involve a more precise phylogenetic location of diversification shifts, and integration of fossil information.

scholarly journals Ecological drivers of spatial community dissimilarity, species replacement and species nestedness across temperate forests

2018 ◽  
Vol 27 (5) ◽  
pp. 581-592 ◽  
Author(s):  
Xugao Wang ◽  
Thorsten Wiegand ◽  
Kristina J. Anderson-Teixeira ◽  
Norman A. Bourg ◽  
Zhanqing Hao ◽  
...  
Keyword(s):  
Temperate Forests ◽  
Species Replacement ◽  
Community Dissimilarity

scholarly journals Phylogenetic, ecological and intraindividual variability patterns in grass phytolith shape

2021 ◽  
Author(s):  
Kristyna Hoskova ◽  
Jiri Neustupa ◽  
Petr Pokorny ◽  
Adela Pokorna
Keyword(s):  
Geometric Morphometrics ◽  
Evolutionary History ◽  
Full Range ◽  
Intraindividual Variability ◽  
Grass Species ◽  
Shape Variation ◽  
Geometric Morphometric ◽  
Deep Time ◽  
Time Diversification ◽  
Palaeoecological Reconstruction

Grass silica short cell (GSSC) phytoliths appear to be the most reliable source of fossil evidence for tracking the evolutionary history and paleoecology of grasses. In recent years, modern techniques have been used to quantitatively assess phytolith shape variation. This progress has widened opportunities with respect to the classification of grass fossil phytoliths. However, phylogenetic, ecological and intraindividual variability patterns in phytolith shape remain largely unexplored. The full range of intraindividual phytolith shape variation (3650 2D outlines) from 73 extant grass species, 48 genera, 18 tribes, and 8 subfamilies (with special attention paid to Pooideae) was analysed using the geometric morphometric analysis based on the semilandmarks spanning phytolith outlines. Although we showed that 2D phytolith shape is mainly driven by deep-time diversification of grass subfamilies, a closer look uncovered distinct phytolith shape variation in early-diverging lineages of Pooideae. The phylogenetic pattern in phytolith shape was successfully revealed by applying geometric morphometrics to 2D phytolith shape outlines. This finding strengthens the potential of phytoliths to track the evolutionary history and paleoecology of grasses. Moreover, geometric morphometrics of 2D phytolith shape proved to be an excellent tool for analysis requiring large sums of phytolith outlines, making it useful for quantitative palaeoecological reconstruction.

Embryos in Deep Time

2012 ◽  
Author(s):  
Marcelo Sánchez
Keyword(s):  
Deep Time

High community dissimilarity at low productivity causes the productivity-richness relation to vary with observational scale

2010 ◽  
Vol 11 (1) ◽  
pp. 27-34 ◽  
Author(s):  
W. Li ◽  
M. Stevens
Keyword(s):  
Community Dissimilarity

Decisions, Stocks, and Time Diversification

2012 ◽  
Author(s):  
Sebastien Lleo ◽  
Dennis W. McLeavey
Keyword(s):  
Time Diversification
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