Acacia koa is a native Hawaiían hardwood tree that traditionally has been prized as a craft and furniture-making wood. Its range has been greatly reduced because of logging and land clearing for agricultural production.
Scientists involved in the study have published their findings in the April edition of Forest Ecology and Management, a scientific journal covering forest ecosystems worldwide. The article is entitled, “Understory Structure in a 23-Year-Old Acacia Koa Forest and Two-Year Growth Responses to Silvicultural Treatments.”
Previous studies have shown that a lack of knowledge about koa tree production has hampered commercial forestry investment efforts in Hawaií.
Scientists in this study began to fill this knowledge gap in 2002 when they started measuring how koa trees respond to the thinning of competing trees and the application of fertilizers. They were also concerned about how the trees and understory plants responded to chemical control of non-native grasses because about 20 percent of endangered plants in Hawaií are understory species found in koa forests.
They found the potential koa crop trees in the test area on the eastern slope of Mauna Loa annually increased their stem diameter at chest height by nearly 120 percent.
In addition, they found the treatments did not adversely affect the growth of native understory plants and non-native grasses did not grow more where tree thinning had occurred. Scientists even found fertilizers reduced the growth of these alien grasses when compared to unfertilized test plots.
The study’s findings also showed the treatments were either neutral or beneficial to forest bird habitat, an important consideration because many trees in koa forests bear fleshy fruits or provide habitat for insects eaten by many Hawaiían birds.
“Our findings indicate the use of low-impact silvicultural treatments in young koa stands not only increases wood production, but also is compatible with maintenance of healthy, intact native understory vegetation,” said Paul
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Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
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Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
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Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
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