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"Arms race"
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THE EVOLUTIONARY RESPONSE OF PREDATORS TO DANGEROUS PREY: HOTSPOTS AND COLDSPOTS IN THE GEOGRAPHIC MOSAIC OF COEVOLUTION BETWEEN GARTER SNAKES AND NEWTS
.— The “geographic mosaic” approach to understanding coevolution is predicated on the existence of variable selection across the landscape of an interaction between species. A range of ecological factors, from differences in resource availability to differences in community composition, can generate such a mosaic of selection among populations, and thereby differences in the strength of coevolution. The result is a mixture of hotspots, where reciprocal selection is strong, and coldspots, where reciprocal selection is weak or absent, throughout the ranges of species. Population subdivision further provides the opportunity for nonadaptive forces, including gene flow, drift, and meta‐population dynamics, to influence the coevolutionary interaction between species. Some predicted results of this geographic mosaic of coevolution include maladapted or mismatched phenotypes, maintenance of high levels of polymorphism, and prevention of stable equilibrium trait combinations. To evaluate the potential for the geographic mosaic to influence predator‐prey coevolution, we investigated the geographic pattern of genetically determined TTX resistance in the garter snake Thamnophis sirtalis over much of the range of its ecological interaction with toxic newts of genus Taricha. We assayed TTX resistance in over 2900 garter snakes representing 333 families from 40 populations throughout western North America. Our results provide dramatic evidence that geographic structure is an important component in coevolutionary interactions between predators and prey. Resistance levels vary substantially (over three orders of magnitude) among populations and over short distances. The spatial array of variation is consistent with two areas of intense evolutionary response by predators (“hotspots”) surrounded by clines of decreasing resistance. Some general predictions of the geographic mosaic process are supported, including clinal variation in phenotypes, polymorphism in some populations, and divergent outcomes of the interaction between predator and prey. Conversely, our data provide little support for one of the major predictions, mismatched values of interacting traits. Two lines of evidence suggest selection is paramount in determining population variation in resistance. First, phylogenetic information indicates that two hotspots of TTX resistance have evolved independently. Second, in the one region that TTX levels in prey have been quantified, resistance and toxicity levels match almost perfectly over a wide phenotypic and geographic range. However, these results do not preclude the role the nonadaptive forces in generating the overall geographic mosaic of TTX resistance. Much work remains to fill in the geographic pattern of variation among prey populations and, just as importantly, to explore the variation in the ecology of the interaction that occurs within populations.
Journal Article
Advances in the Study of Coevolution Between Avian Brood Parasites and Their Hosts
The interactions between avian obligate interspecific brood parasites and their hosts provide tractable systems for studying coevolutionary processes in nature. This review highlights recent advances in understanding coevolution in these systems. First, we discuss the evolution and phylogenetic history of avian brood parasitism. Next, we examine coevolved adaptations and counteradaptations in brood parasites and hosts at all stages of the host nesting cycle: those that precede laying of the parasitic egg and those at the egg, chick, and fledgling stages. We then consider the factors that affect the evolution of offense and defense portfolios (the suites of adaptations and counteradaptations across the nesting cycle), and the outcomes of coevolutionary interactions between brood parasites and hosts. Ongoing efforts to document the diversity of host defenses and parasite offenses will facilitate understanding of coevolutionary processes and the ecological and evolutionary consequences of species interactions in the natural world.
Journal Article
Euromissiles
In Euromissile
s, Susan Colbourn tells the story of the height of nuclear
crisis and the remarkable waning of the fear that gripped the
globe. In the Cold War conflict that pitted nuclear
superpowers against one another, Europe was the principal
battleground. Washington and Moscow had troops on the ground and
missiles in the fields of their respective allies, the NATO nations
and the states of the Warsaw Pact. Euromissiles-intermediate-range
nuclear weapons to be used exclusively in the regional theater of
war-highlighted how the peoples of Europe were dangerously placed
between hammer and anvil. That made European leaders uncomfortable
and pushed fearful masses into the streets demanding peace in their
time. At the center of the story is NATO. Colbourn highlights the
weakness of the alliance seen by many as the most effective bulwark
against Soviet aggression. Divided among themselves and uncertain
about the depth of US support, the member states were riven by the
missile issue. This strategic crisis was, as much as any summit
meeting between US president Ronald Reagan and Soviet general
secretary Mikhail Gorbachev, the hinge on which the Cold War
turned. Euromissiles is a history of diplomacy and
alliances, social movements and strategy, nuclear weapons and
nagging fears, and politics. To tell that history, Colbourn takes a
long view of the strategic crisis-from the emerging dilemmas of
allied defense in the early 1950s through the aftermath of the INF
Treaty thirty-five years later. The result is a dramatic and
sweeping tale that changes the way we think about the Cold War and
its culmination.
eBook
The twilight of the bombs : recent challenges, new dangers, and the prospects for a world without nuclear weapons
This culminating volume in Richard Rhodes's monumental and prizewinning history of nuclear weapons offers the first comprehensive narrative of the challenges faced in a post-Cold War age from the second war in Iraq to the emerging threat of nuclear terrorism, from the changing roles of the five original nuclear powers to our complicated relationships with North Korea and South Asia. Finally, Rhodes imagines what a post-nuclear world might look like, suggesting what might make it possible.
Book
Racing toward Tragedy? China's Rise, Military Competition in the Asia Pacific, and the Security Dilemma
In the post–Cold War period, scholars have considered the Asia Pacific to be ripe for military competition and conflict. Developments over the past decade have deepened these expectations. Across the region, rising military spending and efforts of various states to bolster their military capabilities appear to have created an increasingly volatile climate, along with potentially vicious cycles of mutual arming and rearming. In this context, claims that China's rapid economic growth and surging military spending are fomenting destabilizing arms races and security dilemmas are widespread. Such claims make for catchy headlines, yet they are rarely subject to rigorous empirical tests. Whether patterns of military competition in the Asia Pacific are in fact attributable to a security dilemma–based logic has important implications for international relations theory and foreign policy. The answer has direct consequences for how leaders can maximize the likelihood that peace and stability will prevail in this economically and strategically vital region. A systematic empirical test derived from influential theoretical scholarship on the security dilemma concept assesses the drivers of bilateral and multilateral frictions and military competition under way in the Asia Pacific. Security dilemma–driven competition appears to be an important contributor, yet the outcome is not structurally determined. Although this military competition could grow significantly in the near future, there are a number of available measures that could help to ameliorate or manage some of its worst aspects.
Journal Article
Nuclear weapons and the arms race
\"This timely title discusses the creation of the atom bomb and the post-World War II nuclear arms race that shaped the consciousness of generations. Primary and secondary source materials such as contemporary photos, speeches, letters, and newspaper accounts are examined, offering readers insight into a world reeling from years of conflict, and the competing political and social ideologies of the former Soviet Union and the United States and its allies. Topics covered include the Manhattan Project, the dropping of the first atomic bombs, and the escalation of the arms race, as well as nuclear treaties and the relevance to today's nuclear threats.\"--Provided by publisher.
BOOK
Can an arms race promote stability? The inter-Korean qualitative arms race and US extended deterrence
Purpose
This paper aims to provide a case study of complex conflict management within the arms race on the Korean Peninsula. Exploring the complex nexus of nuclear weapons, asymmetry and a qualitative arms race, the study explains how the arms race between Seoul and Pyongyang has promoted stability on the Korean Peninsula.
Design/methodology/approach
Presenting the limits of arguments that the US security guarantee is the factor that saved the two Koreas from going to war again, this paper explores the utility of the inter-Korean arms race as a stabilizer that promotes indirect negotiations. While presenting Korean anomalies, this paper analyzes the three stages of the inter-Korean arms race – especially its nuclear weapons, its asymmetry and the nature of arms races – and provides extant explanations on the causes and consequences of the qualitative arms race. These key elements drive the states’ strategic motives.
Findings
Using the case of the inter-Korean qualitative arms race and US extended nuclear deterrence on the Korean Peninsula, the study shows the complexities of conflict management today. This paper identifies three contributing factors – US nuclear weapons, asymmetry and the qualitative characteristic of the arms race – to explain the enduring stability on the peninsula despite the arms race’s intensification. The paper finds that although US nuclear-extended deterrence plays a critical role, it does not capture the full context of the ongoing, dynamic inter-Korean arms race; a prolonged arms race between the two Koreas has become a new regularity; the qualitative characteristic of the inter-Korean arms race, which is driven by technological advancement, contributes to stability in the arms race; and as the constant mismatch in priority technologies becomes more severe, the changes to the existing asymmetry could increase instability.
Originality/value
This paper offers a diverse perspective to the literature on conflict management and captures the complexities of 21st-century conflict management. Through a thorough examination of the inter-Korean arms race, it brings readers’ attention to the nested dynamics within the arms race and shows how an intensifying arms race can promote stability. Furthermore, the paper explains the implications for potential instability – fueled by the comprehensive mix of a dynamic qualitative arms race and the US extended nuclear deterrence – in the Indo-Pacific region.
Journal Article