In testing varying reintroduction scenarios with the NEWGARDEN software, the UC team simulated natural population development and found
* To ensure the greatest population growth rate and genetic diversity retention among the original founders and offspring trees, an original planting of a stand of 169 founders should be 1,500 meters (about 1,640 yards) into the preserve’s borders. Said Kashimshetty, “If you plant near the edge of a preserve, you risk slower population growth and greater loss of genetic variation due to offspring dispersal out of the preserve.”
* By simply planting the founder trees 1,500 meters into the preserve and planting the original founder trees in a grid 16 feet apart from one another, the result in 101 years’ time should be about 7,000 trees.
* At least 9,000 resulting trees would be possible in 101 years’ time by moderate dispersal (manually moving) of offspring seeds or seedlings to greater distances from the founders than would occur naturally.
* If the original stand of trees is planted at the edge of the preserve, it’s estimated that the original stand of 169 trees would result in approximately 2,000 resulting trees in 101 years’ time. Thus, by planting the trees further into a preserve at 1,500 meters, with proper spacing, it’s estimated that 247 percent more trees will result in 101 years’ time.
* Even planting the founder trees only 500 meters (1,640 feet) into the preserve vs. planting founders on the preserve’s edge would increase the population size by 148 percent in 101 years’ time.
* Further, by planting the original founder trees just 500 meters into the preserve, 97 percent of their genetic diversity is preserved. Thus, if the goal is only to preserve genetic diversity without regard for achieving maximum population size, it’s sufficient to plant the original stand 500 meters (1,640 feet) into the preserve.
Through such comparative computer modeling, the goal is to provide improved guidelines for the spacing and geometric patterning of founding trees in restoration plantings of American Chestnut, leading to a more successful return of this threatened but important native to the eastern forests of North America.
M.B. Reilly | Newswise Science News
Six-legged livestock -- sustainable food production
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Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
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Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
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An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
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