Results 31 to 40 of about 168,062 (287)

Secondary sympatry caused by range expansion informs on the dynamics of microendemism in a biodiversity hotspot. [PDF]

PLoS ONE, 2012
Islands are bounded areas where high endemism is explained either by allopatric speciation through the fragmentation of the limited amount of space available, or by sympatric speciation and accumulation of daughter species.
Romain Nattier, Philippe Grandcolas, Marianne Elias, Laure Desutter-Grandcolas, Hervé Jourdan, Arnaud Couloux, Tony Robillard   +6 more
doaj   +1 more source

Concentrations of Essential Trace Metals in the Brain of Animal Species—A Comparative Study

Brain Sciences, 2020
The essential trace metals iron, zinc, and copper have a significant physiological role in healthy brain development and function. Especially zinc is important for neurogenesis, synaptogenesis, synaptic transmission and plasticity, and neurite outgrowth.
Chiara Alessia DeBenedictis, Andrea Raab, Ellen Ducie, Shauna Howley, Joerg Feldmann, Andreas Martin Grabrucker   +5 more
doaj   +1 more source

Multilocus phylogeography and ecological niche modeling suggest speciation with gene flow between the two Bamboo Partridges

Avian Research, 2021
Background Understanding how species diversify is a long-standing question in biology. The allopatric speciation model is a classic hypothesis to explain the speciation process. This model supposes that there is no gene flow during the divergence process
Pengcheng Wang, Chiafen Yeh, Jiang Chang, Hongyan Yao, Yiqiang Fu, Chengte Yao, Xiao Wang, Shouhsien Li, Zhengwang Zhang   +8 more
doaj   +1 more source

Migration and speciation [PDF]

Nature, 2000
Although migration is a common behaviour, the effects of this annual two-way event on the speciation process are poorly understood, even though birds, which are commonly migratory b played a critical role in the development of speciation theory1,2. Here I propose that new developments3,4 in the theory of sympatric speciation — a process whereby new ...
openaire   +2 more sources

Investigating the molecular basis of adaptation and speciation in divergent populations [PDF]

, 2013
The creation of biodiversity involves the evolution of new species. Recent trends in the study of speciation have increased the emphasis on the role of ecology in adaptation and the evolution of reproductive isolation.
Smith, Gilbert
core   +2 more sources

Sexual and postmating reproductive isolation between allopatric Drosophila montana populations suggest speciation potential [PDF]

, 2011
This work was funded by a European Commission Research Training Grant RTN2-2001-00049, the Centre of Excellence for Evolutionary Research at the University of Jyväskylä and a Marie Curie Initial Training Network, ‘Understanding the evolutionary origin of
Jennings, Jackson H., Ritchie, Michael G., Jennings, Jackson, Dominique Mazzi, Mazzi, Dominique, Hoikkala, Anneli, Ritchie, Michael, Anneli Hoikkala, Jackson H Jennings, Michael G Ritchie, Hoikkala Anneli, Jennings Jackson H, Ritchie Michael G, Mazzi Dominique   +13 more
core   +2 more sources

Machine Learning‐Supported Analysis for Predicting and Visualizing Nonlinear Relationships Between Material Properties in Electroplated Chromium Layers

Advanced Engineering Materials, EarlyView.
This study applies machine learning regression to predict chromium layer thickness in decorative trivalent chromium electroplating, using 441 experiments from laboratory‐scale (1L) and pilot‐scale (14L) setups. Tree‐based models, particularly CatBoost, outperformed linear regression by capturing nonlinear parameter interactions (R2$R^2$ up to 0.77 ...
Christoph Baumer, Christopher Mai, Luca Eisentraut, Andreas Bund, Ricardo Buettner   +4 more
wiley   +1 more source

Zinc Oxide Nanoparticles Catalyzed Condensation Reaction of Isocoumarins and 1,7-Heptadiamine in the Formation of Bis-Isoquinolinones

The Scientific World Journal, 2012
The diversified bis-isoquinolinones were obtained in two steps, utilizing homophthalic acid and various acid chlorides providing 3-substituted isocoumarins in the first step which on further condensation with 1,7-heptadiamine involving C–N bond formation
Varadhan Krishnakumar, Kesarla Mohan Kumar, Badal Kumar Mandal, Fazlur-Rahman Nawaz Khan   +3 more
doaj   +1 more source

Pleistocene speciation is not refuge speciation [PDF]

Journal of Biogeography, 2014
AbstractA number of researchers working on the origin of extant Neotropical biodiversity implicitly and without appropriate proofs assume that Pleistocene speciation should necessarily follow the rules of the refuge hypothesis. A recent example is provided by a study of Neotropical butterflies. Although the analysis showed that these groups experienced
openaire   +2 more sources

Non‐Additive Criteria Assessment in Sustainability Evaluation of High Entropy Alloys: A Toxicity‐Weighted Framework

Advanced Engineering Materials, EarlyView.
Sustainability assessment requires methodologies that appropriately distinguish between additive and non‐additive material properties. A toxicity‐weighted scoring system is developed and applied that accounts for the disproportionate influence of highly toxic constituents through nonlinear weighting functions, providing more realistic estimates than ...
Seth Mehalic, Oladele A. Ogunseitan, Julie M. Schoenung   +2 more
wiley   +1 more source