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Description
Microarthropods play important roles in the decomposition process of the detrital food web, where they break down organic matter and return nutrients to the soil. However, only a small percentage of the belowground microarthropod population has been studied or even discovered, leading to a decrease in the knowledge of all of the processes carried out by these organisms and their importance to the soil. This is because microarthropod extraction methods are not 100% effective at collecting specimens. This study aimed to find an ideal quantitative procedure to better record the number of microarthropods existing in the soil and to determine if a seasonal variation exists that effects the success of extraction. Two extraction methods, including dynamic extraction and heptane flotation extraction, were compared across two seasons, a dry season (June) and a wet season (September). Average biomasses and average richness were calculated for four different functional groups, including Prostigmata, Mesostigmata, Cryptostigmata, and Collembola, across the two seasons, and statistical analysis was performed to determine if any differences that existed were statistically significant. Results indicate that the dynamic extraction method was significantly more effective for the collection of microarthropods during the wet season, and the heptane extraction method was significantly more effective during the dry season. In addition, the heptane procedure recovered samples of higher average richness than the dynamic method during both seasons. The heptane procedure works best for extraction during the dry season because it is able to collect organisms that entered into an ametabolic anhydrobiotic state to escape desiccation. These organisms form a protective lipid layer around their exoskeletons to retain water, and the non-polar exoskeletons display a chemical affinity to the heptane fluid, allowing for collection out of the soil and into the heptane layer. Despite these results, no one method is entirely superior to the other, and the most efficacious procedure depends on the researcher's aim of study.
ContributorsAntol, Rachel Lynn (Author) / Sabo, John L. (Thesis director) / Hall, Sharon (Committee member) / Wyant, Karl A. (Committee member) / Barrett, The Honors College (Contributor) / School of Life Sciences (Contributor)
Created2014-12
ContributorsCai, Jun (Performer) / ASU Library. Music Library (Publisher)
Created2018-10-10
ContributorsHerbst, Felix (Performer) / Wills, Grace (Performer) / Sapanara, Taylor (Performer) / DiBarry, Michael (Performer) / Soberano, Chino (Performer) / Hankins, Kim (Performer) / Son, Jennifer (Performer) / Liu, Jingting (Performer) / Lee, Jun (Performer) / Cai, Jun (Performer) / Herberger String Quartet (Performer) / ASU Library. Music Library (Publisher)
Created2019-04-03
ContributorsCai, Jun (Performer) / ASU Library. Music Library (Publisher)
Created2019-09-30
Description
Remembered as a virtuoso pianist from the Romantic period, Anton Rubinstein (1829-1894) was well-known for his outstanding piano technique and his series of historic recitals. Rubinstein was also a prolific composer, and piano music constitutes a substantial portion of his output. Scholars and pianists recently have shown interest in Rubinstein’s music, primarily his piano sonatas and études. His Morceaux, however, receive little notice and are seldom performed by pianists today. The project at hand examines four pieces: Impromptu and Serenade from Morceaux, Op. 16, and Ballade and Variations from Morceaux, Op. 104. These works are explored from both compositional and performance perspectives. After a brief introduction about Rubinstein’s life and his piano music, the four pieces from these two sets of Morceaux are described analytically. Performance suggestions follow the description of each piece, concentrating on the technical and expressive challenges for pianists.
ContributorsCai, Jun (Author) / Holbrook, Amy (Thesis advisor) / Meir, Baruch (Thesis advisor) / Creviston, Hannah (Committee member) / Arizona State University (Publisher)
Created2021