scholarly journals Evolutionary Effect on the Embodied Beauty of Landscape Architectures

2018 ◽  
Vol 16 (1) ◽  
pp. 147470491774974 ◽  
Author(s):  
Wei Zhang ◽  
Xiaoxiang Tang ◽  
Xianyou He ◽  
Guangyao Chen
Keyword(s):  
Evolutionary Effect

scholarly journals Chemical and kinematic complexity of the very young star-forming region Serpens Main observed with ALMA

2017 ◽  
Vol 13 (S332) ◽  
pp. 249-253
Author(s):  
Łukasz Tychoniec ◽  
Charles L. H. Hull ◽  
John J. Tobin ◽  
Ewine F. van Dishoeck
Keyword(s):  
Chemical Composition ◽  
Young Star ◽  
The Other ◽  
Evolutionary Effect ◽  
No Emission ◽  
Complex Molecules ◽  
Star Forming ◽  
Other Hand ◽  
Low Mass ◽  
Main Region

AbstractThe youngest low-mass protostars are known to be chemically rich, accreting matter most vigorously, and producing the most powerful outflows. Molecules are unique tracers of these phenomena. We use ALMA to study several outflow sources in the Serpens Main region. The most luminous source, Ser-SMM1, shows the richest chemical composition, but some complex molecules are also present in S68N. No emission from complex organics is detected toward Ser-emb 8N, which is the least luminous in the sample. We discuss whether these differences reflect an evolutionary effect or whether they are due to different physical structures. We also analyze the outflow structure from these young protostars by comparing emission of CO and SiO. EHV molecular jets originating from SMM1-a,b and Ser-emb 8N contrast with no such activity from S68N, which on the other hand presents a complex outflow structure.

scholarly journals The stellar mass-metallicity relations of galaxies from high-z to the local

2006 ◽  
Vol 2 (S235) ◽  
pp. 414-414
Author(s):  
Y. C. Liang ◽  
F. Hammer ◽  
L. C. Deng
Keyword(s):  
Evolutionary Process ◽  
Stellar Mass ◽  
Box Model ◽  
Evolutionary Effect ◽  
Star Forming ◽  
Distant Galaxies

AbstractThe stellar mass-metallicity relations of star-forming galaxies at intermediate-z (0.4<z<1) and high-z (z≥2) are compared with the local SDSS galaxies. It shows obvious evolutionary effect, i.e., at a given stellar mass, the intermediate-z galaxies show about 0.3 dex lower metallicity, and the high-z galaxies show about 0.56 dex more metal-deficient than the local ones. These distant galaxies will produce these important parts of their metals during the consequent evolutionary process. A close-box model can explain this evolutionary process generally.

scholarly journals REMARKS ON THE EVOLUTIONARY EFFECT OF NATURAL SELECTION

Genetics ◽  
1976 ◽  
Vol 83 (3) ◽  
pp. 601-607
Author(s):  
W J Ewens
Keyword(s):  
Natural Selection ◽  
Present Note ◽  
Great Majority ◽  
Linkage Equilibrium ◽  
Evolutionary Effect ◽  
Mathematical Theorem ◽  
Fitness Parameters ◽  
Mean Fitness ◽  
The Mean ◽  
Quasi Linkage Equilibrium

ABSTRACT The so-called "Fundamental Theorem of Natural Selection", that the mean fitness of a population increases with time under natural selection, is known not to be true, as a mathematical theorem, when fitnesses depend on more than one locus. Although this observation may not have particular biological relevance, (so that mean fitness may well increase in the great majority of interesting situations), it does suggest that it is of interest to find an evolutionary result which is correct as a mathematical theorem, no matter how many loci are involved. The aim of the present note is to prove an evolutionary theorem relating to the variance in fitness, rather than the mean: this theorem is true for an arbitrary number of loci, as well as for arbitrary (fixed) fitness parameters and arbitrary linkage between loci. Connections are briefly discussed between this theorem and the principle of quasi-linkage equilibrium.

Call synchrony and the evolutionary origins of leader preference in Neoconocephalus ensiger katydids

2016 ◽  
Author(s):  
◽  
Megan Murphy
Keyword(s):  
Male Quality ◽  
Evolutionary Effect ◽  
Female Fitness ◽  
Closely Related Species ◽  
University Of Missouri ◽  
Evolutionary Origins ◽  
Male Trait ◽  
Specific Source ◽  
The University ◽  
Leader Preference

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Many species of acoustically communicating insects and anurans display a female preference for males producing their calls just ahead of those of their neighbors. The evolutionary origin of these preferences is unclear. We test whether leader preference is adaptive in Neoconocephalus katydids. The ability to produce leading calls was not correlated with male quality in a species with leader preference or two closely related species without the preference. However, in N. ensiger, the species with the preference, females mating with leaders produced higher quality offspring than those mating with followers. This suggested that leader preference is adaptive and selected for in this species. The ability to produce leading calls was not heritable, meaning that the preference cannot have an evolutionary effect on the male trait and they will not become coupled. Male N. ensiger adjust the timing of their chirps relative to their neighbors, which leads to synchrony within a chorus. The mechanism used by N. ensiger males differs from that of all previously described species with acoustic synchrony. Neoconocephalus ensiger males adjust their actual intrinsic chirp rate to match that of other males. The characteristics that determine a male's ability to produce leading calls and the specific source of the female fitness benefit are yet unknown.

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