120 research outputs found

    National Security and Immigration Policy: Reclaiming Terms, Measuring Success, and Setting Priorities

    Get PDF
    This paper offers a three-pronged framework for evaluating immigration-related security measures and tactics. First, does the measure or strategy relate to a legitimate security goal? Second, what does the measure propose to accomplish, will it be successful in achieving that end, and how can its success (or failure) be assessed? Third, is the measure worth the cost both in resources and opportunities foregone? The paper goes on to evaluate the US Government\u27s recent implementation of the US-VISIT program against this framework

    Margaret D. Stock on Mexican Americans & the Law by Reynaldo Anaya Valencia, Sonia R. García, Henry Flores, and José Roberto Juårez, Jr. Tucson, AZ: The University of Arizona Press, 2004. 198pp.

    Get PDF
    A review of: Mexican Americans & the Law by Reynaldo Anaya Valencia, Sonia R. García, Henry Flores, and José Roberto Juårez, Jr. Tucson, AZ: The University of Arizona Press, 2004. 198pp

    The Lessons of 9/11: A Failure of Intelligence, Not Immigration Law

    Get PDF
    In the hours following the deadly terrorist attacks of September 11, 2001, the United States government took the extraordinary step of sealing U.S. borders to traffic and trade by grounding all aircraft flying into or out of the country and imposing a lock-down on the networks of transportation and commerce that are the lifeblood of our economy and society. Given the uncertainty over what might happen next, these emergency procedures were a necessary and appropriate short-term response to the attacks. In the long run, however, a siege mentality and the construction of a fortress America are ineffective and unrealistic responses to the dangers we face. If we are to succeed in reducing our vulnerability to further terrorist attacks, we must focus our attention and resources on the gaps in intelligence gathering and information sharing that allowed nineteen terrorists to enter the United States. National security is most effectively enhanced by improving the mechanisms for identifying actual terrorists, not by implementing harsher immigration laws or blindly treating all foreigners as potential terrorists. Policies and practices that fail to properly distinguish between terrorists and legitimate foreign travelers are ineffective security tools that waste limited resources, damage the U.S. economy, alienate those groups whose cooperation the U.S. government needs to prevent terrorism, and foster a false sense of security by promoting the illusion that we are reducing the threat of terrorism

    Isolation, characterization, and cross‐amplification of 20 microsatellite markers for Conospermum undulatum (Proteaceae)

    Get PDF
    PREMISE: Recent habitat fragmentation is posing a risk to the wavy‐leaved smokebush, Conospermum undulatum (Proteaceae), a rare plant species endemic to southwestern Western Australia. Microsatellite markers are required to characterize the genetic diversity and structure of the species for conservation purposes and to facilitate ecological studies. METHODS AND RESULTS: Illumina MiSeq high‐throughput sequencing was used to develop 20 novel microsatellite markers for C. undulatum. Polymorphism at each locus was assessed using 72 individuals from three natural populations. Nineteen markers were polymorphic, with the number of alleles per locus ranging from two to 21, and observed and expected heterozygosity ranging from 0.000 to 1.000 and 0.117 to 0.919, respectively. All markers successfully amplified in three congeneric species (C. stoechadis, C. canaliculatum and C. triplinervium). CONCLUSIONS: The microsatellite markers will be useful for revealing patterns of genetic diversity, dispersal dynamics, and hybridization events for C. undulatum to inform future conservation efforts

    Genetic and ecological consequences of recent habitat fragmentation in a narrow endemic plant species within an urban context

    Get PDF
    Understanding the timescales that shape spatial genetic structure is pivotal to ascertain the impact of habitat fragmentation on the genetic diversity and reproductive viability of long-lived plant populations. Combining genetic and ecological information with current and past fragmentation conditions allows the identification of the main drivers important in shaping population structure and declines in reproduction, which is crucial for informing conservation strategies. Using historic aerial photographs, we defined the past fragmentation conditions for the shrub Conospermum undulatum, a species now completely embedded in an urban area. We explored the impact of current and past conditions on its genetic layout and assessed the effects of genetic and environmental factors on its reproduction. The historically high structural connectivity was evident in the genetics of the species. Despite the current intense fragmentation, we found similar levels of genetic diversity across populations and a weak spatial genetic structure. Historical connectivity was negatively associated with genetic differentiation among populations and positively related to within-population genetic diversity. Variation partitioning of reproductive performance explained ~ 66% of the variance, showing significant influences for genetic (9%), environmental (15%), and combined (42%) fractions. Our study highlights the importance of considering the historical habitat dynamics when investigating fragmentation consequences in long-lived plants. A detailed characterization of fragmentation from 1953 has shown how low levels of genetic fixation are due to extensive gene flow through the non-fragmented landscape. Moreover, knowledge of the relationships between genetic and environmental variation and reproduction can help to implement effective conservation strategies, particularly in highly dynamic landscapes

    Genomic Scans across Three Eucalypts Suggest that Adaptation to Aridity is a Genome-Wide Phenomenon

    Get PDF
    Widespread species spanning strong environmental (e.g., climatic) gradients frequently display morphological and physiological adaptations to local conditions. Some adaptations are common to different species that occupy similar environments. However, the genomic architecture underlying such convergent traits may not be the same between species. Using genomic data from previous studies of three widespread eucalypt species that grow along rainfall gradients in southern Australia, our probabilistic approach provides evidence that adaptation to aridity is a genome-wide phenomenon, likely to involve multiple and diverse genes, gene families and regulatory regions that affect a multitude of complex genetic and biochemical processes

    Climate-adjusted provenancing: A strategy for climate-resilient ecological restoration

    Get PDF
    Investments in ecological restoration are estimated at $US 2 trillion per annum worldwide and are increasing rapidly (Cunningham, 2008; Williams et al., 2014). These investments are occurring in an environment of accelerated climate change that is projected to continue into the next century, yet they currently take little account of such change. This has significant implications for the long-term success of restoration plantings across millions of hectares, with germplasm used in current restoration efforts potentially poorly-adapted to future climates. New approaches that optimize the climate-resilience of these restoration efforts are thus essential (Breed et al., 2013; Williams et al., 2014; Havens et al., 2015)..
    • 

    corecore