Matching Items (2)
Description
The disputes in the South China Sea involve overlapping territorial claims from multiple nations and have grown increasingly contentious over the past decade. The area is rich in natural resources and is strategically significant regarding international trade and military capabilities. Due to the significance of the area, the competing claims have global ramifications and the conflict involves actors beyond the region. This paper examines the geopolitical factors involved in the disputes and how they shape states' actions in relation to the South China Sea. Specifically, this paper will show how China's actions in the South China Sea reflect both the geography of the region, and also its political ambitions in the region and international community. The states' claims contend the territory, territoriality, and sovereignty of islands in the South China Sea, and are based on both international law and historical evidence illustrated in the case between the Philippines and China in the Scarborough Shoal. It demonstrates China's tactics for managing competing claims, its increasing military capabilities, and the uncertainty of resolutions to the conflict. The mechanisms for the resolution of the territorial disputes in the South China Sea are shown to be largely ineffective given the differing basis of claims over the South China Sea states have. International institutions, such as United Nations tribunals, and other nations without direct claims in the South China Sea, such as the United States, have interests in the conflict related to the peaceful resolution of disputes between nations, while also influencing states' actions. This paper reviews the concepts of geopolitics and how China's strategy in the South China Sea reflects both critical and classical geopolitics and its objective of regional hegemony.
ContributorsKelly, Megan Jean (Author) / Sivak, Henry (Thesis director) / Lundry, Chris (Committee member) / School of Politics and Global Studies (Contributor) / Barrett, The Honors College (Contributor)
Created2016-12
Description
The most abundantly studied societies, with the exception of humans, are those of the eusocial insects, which include all ants. Eusocial insect societies are typically composed of many dozens to millions of individuals, referred to as nestmates, which require some form of communication to maintain colony cohesion and coordinate the activities within them. Nestmate recognition is the process of distinguishing between nestmates and non-nestmates, and embodies the first line of defense for social insect colonies. In ants, nestmate recognition is widely thought to occur through olfactory cues found on the exterior surfaces of individuals. These cues, called cuticular hydrocarbons (CHCs), comprise the overwhelming majority of ant nestmate profiles and help maintain colony identity. In this dissertation, I investigate how nestmate recognition is influenced by evolutionary, ontogenetic, and environmental factors. First, I contributed to the sequencing and description of three ant genomes including the red harvester ant, Pogonomyrmex barbatus, presented in detail here. Next, I studied how variation in nestmate cues may be shaped through evolution by comparatively studying a family of genes involved in fatty acid and hydrocarbon biosynthesis, i.e., the acyl-CoA desaturases, across seven ant species in comparison with other social and solitary insects. Then, I tested how genetic, developmental, and social factors influence CHC profile variation in P. barbatus, through a three-part study. (1) I conducted a descriptive, correlative study of desaturase gene expression and CHC variation in P. barbatus workers and queens; (2) I explored how larger-scale genetic variation in the P. barbatus species complex influences CHC variation across two genetically isolated lineages (J1/J2 genetic caste determining lineages); and (3) I experimentally examined how CHC development is influenced by an individual’s social environment. In the final part of my work, I resolved discrepancies between previous findings of nestmate recognition behavior in P. barbatus by studying how factors of territorial experience, i.e., spatiotemporal relationships, affect aggressive behaviors among red harvester ant colonies. Through this research, I was able to identify promising methodological approaches and candidate genes, which both broadens our understanding of P. barbatus nestmate recognition systems and supports future functional genetic studies of CHCs in ants.
ContributorsCash, Elizabeth I (Author) / Gadau, Jürgen (Thesis advisor) / Liebig, Jürgen (Thesis advisor) / Fewell, Jennifer (Committee member) / Hölldobler, Berthold (Committee member) / Kusumi, Kenro (Committee member) / Arizona State University (Publisher)
Created2016