Dispersal evolution in temporally variable environments: implications for plant range dynamics

2021 ◽  
Author(s):  
Meagan F. Oldfather ◽  
Courtney L. Van Den Elzen ◽  
Patrick M. Heffernan ◽  
Nancy C. Emery
Keyword(s):  
Variable Environments ◽  
Range Dynamics ◽  
Dispersal Evolution

scholarly journals Dispersal, evolution and range dynamics - a synthesis

Oikos ◽  
2013 ◽  
Vol 123 (1) ◽  
pp. 3-4 ◽  
Author(s):  
Alexander Kubisch ◽  
Emanuel A. Fronhofer
Keyword(s):  
Range Dynamics ◽  
Dispersal Evolution

scholarly journals Range dynamics mediated by compensatory life stage responses to experimental climate manipulations

2021 ◽  
Vol 24 (4) ◽  
pp. 772-780
Author(s):  
Meagan F. Oldfather ◽  
Michael J. Koontz ◽  
Daniel F. Doak ◽  
David D. Ackerly
Keyword(s):  
Life Stage ◽  
Range Dynamics

scholarly journals Post-Stroke Adaptation of Lateral Foot Placement Coordination in Variable Environments

2021 ◽  
Vol 29 ◽  
pp. 731-739
Author(s):  
Andrew C. Dragunas ◽  
Tara Cornwell ◽  
Roberto Lopez-Rosado ◽  
Keith E. Gordon
Keyword(s):  
Foot Placement ◽  
Post Stroke ◽  
Variable Environments

scholarly journals Potentials of possible machine systems for directly loading logs in cut-to-length harvesting

2012 ◽  
Vol 42 (5) ◽  
pp. 970-985 ◽  
Author(s):  
Ola Ringdahl ◽  
Thomas Hellström ◽  
Ola Lindroos
Keyword(s):  
Fuel Consumption ◽  
Waiting Times ◽  
Discrete Event ◽  
Lead Times ◽  
Event Simulation ◽  
Variable Environments ◽  
Landing Sites ◽  
Machine Systems ◽  
Stand Conditions ◽  
Key Innovations

In conventional mechanized cut-to-length systems, a harvester fells and cuts trees into logs that are stored on the ground until a forwarder picks them up and carries them to landing sites. A proposed improvement is to place logs directly into the load spaces of transporting machines as they are cut. Such integrated loading could result in cost reductions, shorter lead times from stump to landing, and lower fuel consumption. However, it might also create waiting times for the machines involved, whereas multifunctional machines are likely to be expensive. Thus, it is important to analyze whether or not the advantages of any changes outweigh the disadvantages. The conventional system was compared with four potential systems, including two with autonomous forwarders, using discrete-event simulation with stochastic elements in which harvests of more than 1000 final felling stands (containing in total 1.6 million m3) were simulated 35 times per system. The results indicate that harwarders have substantial potential (less expensive on ≥80% of the volume and fuel consumption decreased by ≥18%) and may become competitive if key innovations are developed. Systems with cooperating machines have considerably less potential, limited to very specific stand conditions. The results conform with expected difficulties in integrating processing and transporting machines’ work in variable environments.

scholarly journals Yield and Quality in Purple-Grained Wheat Isogenic Lines

Agronomy ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 86 ◽  
Author(s):  
Alexey Morgounov ◽  
Yaşar Karaduman ◽  
Beyhan Akin ◽  
Sinan Aydogan ◽  
Peter Stephen Baenziger ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Anthocyanin Content ◽  
Environment Interaction ◽  
Quality Traits ◽  
Isogenic Lines ◽  
Grain Color ◽  
Whole Wheat ◽  
Lack Of Information ◽  
Variable Environments ◽  
Unique Material

Breeding programs for purple wheat are underway in many countries but there is a lack of information on the effects of Pp (purple pericarp) genes on agronomic and quality traits in variable environments and along the product chain (grain-flour-bread). This study was based on unique material: two pairs of isogenic lines in a spring wheat cv. Saratovskaya-29 (S29) background differing only in Pp genes and grain color. In 2017, seven experiments were conducted in Kazakhstan, Russia, and Turkey with a focus on genotype and environment interaction and, in 2018, one experiment in Turkey with a focus on grain, flour, and bread quality. The effect of environment was greater compared to genotype for the productivity and quality traits studied. Nevertheless, several important traits, such as grain color and anthocyanin content, are closely controlled by genotype, offering the opportunity for selection. Phenolic content in purple-grained lines was not significantly higher in whole wheat flour than in red-colored lines. However, this trait was significantly higher in bread. For antioxidant activities, no differences between the genotypes were detected in both experiments. Comparison of two sources of Pp genes demonstrated that the lines originating from cv. Purple Feed had substantially improved productivity and quality traits compared to those from cv. Purple.

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