What Explains Patterns of Diversification and Richness among Animal Phyla?
نویسندگان
چکیده
منابع مشابه
What Explains Patterns of Diversification and Richness among Animal Phyla?
Animal phyla vary dramatically in species richness (from one species to >1.2 million), but the causes of this variation remain largely unknown. Animals have also evolved striking variation in morphology and ecology, including sessile marine taxa lacking heads, eyes, limbs, and complex organs (e.g., sponges), parasitic worms (e.g., nematodes, platyhelminths), and taxa with eyes, skeletons, limbs...
متن کاملFaster diversification on land than sea helps explain global biodiversity patterns among habitats and animal phyla.
Terrestrial environments occupy ~ 30% of the Earth's surface yet contain ~ 80% of all species. The causes of this dramatic biodiversity gradient have remained relatively unstudied. Here, I test the fundamental prediction that predominantly non-marine clades have more rapid rates of diversification than marine clades, using a time-calibrated phylogeny of animal phyla. The results strongly suppor...
متن کاملGlobal patterns of diversification and species richness in amphibians.
Geographic patterns of species richness ultimately arise through the processes of speciation, extinction, and dispersal, but relatively few studies consider evolutionary and biogeographic processes in explaining these diversity patterns. One explanation for high tropical species richness is that many species-rich clades originated in tropical regions and spread to temperate regions infrequently...
متن کاملWhat explains patterns of species richness? The relative importance of climatic‐niche evolution, morphological evolution, and ecological limits in salamanders
A major goal of evolutionary biology and ecology is to understand why species richness varies among clades. Previous studies have suggested that variation in richness among clades might be related to variation in rates of morphological evolution among clades (e.g., body size and shape). Other studies have suggested that richness patterns might be related to variation in rates of climatic-niche ...
متن کاملAnimal Evolution: Are Phyla Real?
A recent study compares developmental gene expression among very distantly related animal species and interprets the results as providing biological justification for phyla. Several problems in the design and interpretation of the study call this conclusion into question.
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ژورنال
عنوان ژورنال: The American Naturalist
سال: 2017
ISSN: 0003-0147,1537-5323
DOI: 10.1086/690194