Territoriality is seen across different species of animals anywhere, from birds, fish, and mammals to reptiles. Although many animals use several types of signals to defend their territories, signals in different sensory modalities have varying properties that may influence their effectiveness in different contexts. This study investigates whether male plateau fence lizards (Sceloporus tristichus) use chemical or visual behavior during territory defense. Both visual and chemical communication modalities inform the audience about the producer’s physiological condition. The results show no obvious tradeoff between visual and chemical modalities in the behavior recorded in the presence of another male lizard compared to when undisturbed, suggesting that these signals are not used in territory defense. An increased visual head bob display is the most common spiny lizard territory defense response to conspecific intruders. However, this is not always the case, as environmental and evolutionary constraints influence communication. This species does not perform typical territorial behavior. However, there was a significant increase in aggressive visual displays, called full shows, in the presence of the intruding live stimulus. An increase in full shows could be a less conspicuous way to defend their territory instead of performing an entire broadcasting head bob display while perched in an open/exposed habitat notably filled with predatory birds. This shows modification within one communication modality to result in more effective communication.

Much like neighboring nations, living in close proximity can often lead to conflict over limited resources for social insect colonies. As with warring nations, conflicts among insect societies can also result in one colony attempting to invade the other. Though emigrations are common and well understood in social insects, the process of emigration in the context of conflict is not known. During emigrations of the ant Temnothorax rugatulus, colonies first employ the use of scouts, who search for new nest locations. These scouts then recruit naïve workers to these nests resulting in a ‘voting’ process through which colonies can collectively choose the best nest site. Once the decision is made, the selected nest is rapidly populated by workers who physically carry the queen(s), brood, and remaining naïve ants to the new nest. Invasions occurring during inter-colony conflicts bear a striking resemblance to this process. The state of the final nest suggested merged colonies, and statistical models were used to test for the likelihood of this. Here we test whether colonies of T. rugatulus use the same mechanisms during invasions as those used in emigrations by observing conflicts between colonies of T. rugatulus ants and tracking instances of scouting and recruitment, transport and changes in populations in each nest. Our results support the predicted order of behaviors starting with scouting, followed by recruitment and transport last. In addition, presence of the quorum rule, which determines the switch from recruitment to transport, is confirmed. Furthermore, evidence showed that the colonies were merged at the time of transport. While ant emigration patterns are well understood, there is a gap in understanding conflict driven emigrations/invasions. Our results serve to better understand conflict in social insects by further understanding the mechanisms used during conflicts.

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.