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1,091 Newest Publications in proceedings of the national academy of sciences current issue

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Correction for Chen et al., Genome sequence of the Asian Tiger mosquito, Aedes albopictus, reveals insights into its biology, genetics, and evolution [Correction]

26-Jan-2016 | Proceedings of the National Academy of Sciences current issue, 2016

APPLIED BIOLOGICAL SCIENCES Correction for “Genome sequence of the Asian Tiger mosquito, Aedes albopictus, reveals insights into its biology, genetics, and evolution,” by Xiao-Guang Chen, Xuanting Jiang, Jinbao Gu, Meng Xu, Yang Wu, Yuhua Deng, Chi Zhang, Mariangela Bonizzoni, Wannes Dermauw, ...

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The impact of large terrestrial carnivores on Pleistocene ecosystems [Evolution]

26-Jan-2016 | Blaire Van Valkenburgh; Matthew W. Hayward; William J. Ripple; Carlo Meloro; V. Louise Roth, Proceedings of the National Academy of Sciences current issue, 2016

Large mammalian terrestrial herbivores, such as elephants, have dramatic effects on the ecosystems they inhabit and at high population densities their environmental impacts can be devastating. Pleistocene terrestrial ecosystems included a much greater diversity of megaherbivores (e.g., mammoths, ...

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Intuition, deliberation, and the evolution of cooperation [Evolution]

26-Jan-2016 | Adam Bear; David G. Rand, Proceedings of the National Academy of Sciences current issue, 2016

Humans often cooperate with strangers, despite the costs involved. A long tradition of theoretical modeling has sought ultimate evolutionary explanations for this seemingly altruistic behavior. More recently, an entirely separate body of experimental work has begun to investigate cooperation’s ...

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Phylogenetic uncertainty and fossil calibration of Asteraceae chronograms [Biological Sciences]

26-Jan-2016 | Jose L. Panero, Proceedings of the National Academy of Sciences current issue, 2016

Barreda et al. (1) claim a Cretaceous fossil pollen type is an extinct Asteraceae. Concluding this pollen type is “nested within Dasyphyllum (crown representative),” they calibrate a Dasyphyllum + Barnadesia crown node (Dasyphyllum crown absent) and estimate an 85.9-Ma Asteraceae crown age that ...

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Decanalization of wing development accompanied the evolution of large wings in high-altitude Drosophila [Evolution]

26-Jan-2016 | Justin B. Lack; Matthew J. Monette; Evan J. Johanning; Quentin D. Sprengelmeyer; John E. Pool, Proceedings of the National Academy of Sciences current issue, 2016

In higher organisms, the phenotypic impacts of potentially harmful or beneficial mutations are often modulated by complex developmental networks. Stabilizing selection may favor the evolution of developmental canalization—that is, robustness despite perturbation—to insulate development against ...

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The precise temporal calibration of dinosaur origins [Evolution]

19-Jan-2016 | Claudia A. Marsicano; Randall B. Irmis; Adriana C. Mancuso; Roland Mundil; Farid Chemale, Proceedings of the National Academy of Sciences current issue, 2016

Dinosaurs have been major components of ecosystems for over 200 million years. Although different macroevolutionary scenarios exist to explain the Triassic origin and subsequent rise to dominance of dinosaurs and their closest relatives (dinosauromorphs), all lack critical support from a precise ...

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Natural selection against a circadian clock gene mutation in mice [Evolution]

19-Jan-2016 | Kamiel Spoelstra; Martin Wikelski; Serge Daan; Andrew S. I. Loudon; Michaela Hau, Proceedings of the National Academy of Sciences current issue, 2016

Circadian rhythms with an endogenous period close to or equal to the natural light–dark cycle are considered evolutionarily adaptive (“circadian resonance hypothesis”). Despite remarkable insight into the molecular mechanisms driving circadian cycles, this hypothesis has not been tested under ...

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A rigorous comparison of sexual selection indexes via simulations of diverse mating systems [Evolution]

19-Jan-2016 | Jonathan M. Henshaw; Andrew T. Kahn; Karoline Fritzsche, Proceedings of the National Academy of Sciences current issue, 2016

Sexual selection is a cornerstone of evolutionary theory, but measuring it has proved surprisingly difficult and controversial. Various proxy measures—e.g., the Bateman gradient and the opportunity for sexual selection—are widely used in empirical studies. However, we do not know how reliably ...

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Evolution of South Atlantic density and chemical stratification across the last deglaciation [Earth, Atmospheric, and Planetary Sciences]

19-Jan-2016 | Jenny Roberts; Julia Gottschalk; Luke C. Skinner; Victoria L. Peck; Sev Kender; Henry Elderfield; Claire Waelbroeck; ..., Proceedings of the National Academy of Sciences current issue, 2016

Explanations of the glacial–interglacial variations in atmospheric pCO2 invoke a significant role for the deep ocean in the storage of CO2. Deep-ocean density stratification has been proposed as a mechanism to promote the storage of CO2 in the deep ocean during glacial times. A wealth of proxy ...

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A ribosome-inactivating protein in a Drosophila defensive symbiont [Evolution]

12-Jan-2016 | Phineas T. Hamilton; Fangni Peng; Martin J. Boulanger; Steve J. Perlman, Proceedings of the National Academy of Sciences current issue, 2016

Vertically transmitted symbionts that protect their hosts against parasites and pathogens are well known from insects, yet the underlying mechanisms of symbiont-mediated defense are largely unclear. A striking example of an ecologically important defensive symbiosis involves the woodland fly ...

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