Results 41 to 50 of about 115,762 (261)

Dynamic patterns of adaptive radiation [PDF]

open access: yesProceedings of the National Academy of Sciences, 2005
Adaptive radiation is defined as the evolution of ecological and phenotypic diversity within a rapidly multiplying lineage. When it occurs, adaptive radiation typically follows the colonization of a new environment or the establishment of a “key innovation,” which opens new ecological niches and/or new paths for evolution.
Sergey, Gavrilets, Aaron, Vose
openaire   +2 more sources

The terroir of the finch: How spatial and temporal variation shapes phenotypic traits in Darwin's finches

open access: yesEcology and Evolution, 2022
The term terroir is used in viticulture to emphasize how the biotic and abiotic characteristics of a local site influence grape physiology and thus the properties of wine.
Paola L. Carrión   +13 more
doaj   +1 more source

Infant Embryonal CNS Tumors: Molecular Insights and Treatment Considerations for Contemporary Pediatric Neuro‐Oncology

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Embryonal tumors comprise the majority of malignant central nervous system (CNS) neoplasms diagnosed in children under 3 years of age. Compared with their counterparts in older children, these tumors exhibit distinct molecular biology and a more aggressive clinical phenotype, while their management is complicated by the heightened ...
Sudarshawn Damodharan   +3 more
wiley   +1 more source

Ordovician rafinesquinine brachiopods from peri-Gondwana [PDF]

open access: yesActa Palaeontologica Polonica, 2016
The study of the strophomenide brachiopods of the subfamily Rafinesquininae present in the main Upper Ordovician sections, representing the Mediterranean margin of Gondwana, has revealed an increase in diversity of the group at the region during that ...
Jorge Colmenar
doaj   +1 more source

The Special and General Mechanism of Cyanobacterial Harmful Algal Blooms

open access: yesMicroorganisms, 2023
Cyanobacterial harmful algal blooms (CyanoHABs) are longstanding aquatic hazards worldwide, of which the mechanism is not yet fully understood, i.e., the process in which cyanobacteria establish dominance over coexisting algae in the same eutrophic ...
Wenduo Cheng   +8 more
doaj   +1 more source

A New Mechanism for Recurrent Adaptive Radiations [PDF]

open access: yesThe American Naturalist, 2007
Models of adaptive radiation through intraspecific competition have attracted mounting attention. Here we show how extending such models in a simple manner, by including a quantitative trait under weak directional selection, naturally leads to rich macroevolutionary patterns involving recurrent adaptive radiations and extinctions.
Ito, H.C., Dieckmann, U.
openaire   +4 more sources

The microbiome in human skin aging

open access: yesFEBS Letters, EarlyView.
Age‐related skin changes encompass the well‐known visible phenotypic alterations, together with microbiome dysbiosis and a series of molecular aging hallmarks. These hallmarks characterize not only a fully stablished aged phenotype but also the skin aging process itself.
Manuel Huerta Arana   +3 more
wiley   +1 more source

LIKELIHOOD OF ANCESTOR STATES IN ADAPTIVE RADIATION [PDF]

open access: yesEvolution, 1997
Theories of ecological diversification make predictions about the timing and ordering of character state changes through history. These theories are testable by "reconstructing" ancestor states using phylogenetic trees and measurements of contemporary species.
Dolph, Schluter   +3 more
openaire   +2 more sources

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

open access: yesMolecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

Adaptive Radiation and the Topology of Large Phylogenies [PDF]

open access: yesEvolution, 1993
The idea that some organisms possess adaptive features that make them more likely to speciate and/or less likely to go extinct than closely related groups, suggests that large phylogenetic trees should be unbalanced (more species should occur in the group possessing the adaptive features than in the sister group lacking such features).
Craig, Guyer, Joseph B, Slowinski
openaire   +2 more sources

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