Lineage diversification and historical demography of a montane bird Garrulax elliotii - implications for the Pleistocene evolutionary history of the eastern Himalayas

<p>Abstract</p> <p>Background</p> <p>Pleistocene climate fluctuations have shaped the patterns of genetic diversity observed in many extant species. In montane habitats, species' ranges may have expanded and contracted along an altitudinal gradient in response to environmental fluctuations leading to alternating periods of genetic isolation and connectivity. Because species' responses to climate change are influenced by interactions between species-specific characteristics and local topography, diversification pattern differs between species and locations. The eastern Himalayas is one of the world's most prominent mountain ranges. Its complex topography and environmental heterogeneity present an ideal system in which to study how climatic changes during Pleistocene have influenced species distributions, genetic diversification, and demography. The Elliot's laughing thrush (<it>Garrulax elliotii</it>) is largely restricted to high-elevation shrublands in eastern Himalayas. We used mitochondrial DNA and microsatellites to investigate how genetic diversity in this species was affected by Pleistocene glaciations.</p> <p>Results</p> <p>Mitochondrial data detected two partially sympatric north-eastern and southern lineages. Microsatellite data, however, identified three distinct lineages congruent with the geographically separated southern, northern and eastern eco-subregions of the eastern Himalayas. Geographic breaks occur in steep mountains and deep valleys of the Kangding-Muli-Baoxin Divide. Divergence time estimates and coalescent simulations indicate that lineage diversification occurred on two different geographic and temporal scales; recent divergence, associated with geographic isolation into individual subregions, and historical divergence, associated with displacement into multiple refugia. Despite long-term isolation, genetic admixture among these subregional populations was observed, indicating historic periods of connectivity. The demographic history of <it>Garrulax elliotii </it>shows continuous population growth since late Pleistocene (about 0.125 mya).</p> <p>Conclusion</p> <p>While altitude-associated isolation is typical of many species in other montane regions, our results suggest that eco-subregions in the eastern Himalayas exhibiting island-like characteristics appear to have determined the diversification of <it>Garrulax elliotii</it>. During the Pleistocene, these populations became isolated on subregions during interglacial periods but were connected when these expanded to low altitude during cooler periods. The resultant genetic admixture of lineages might obscure pattern of genetic variation. Our results provide new insights into sky island diversification in a previously unstudied region, and further demonstrate that Pleistocene climatic changes can have profound effects on lineage diversification and demography in montane species.</p

Stickiness and the adaptation of organizational practices in cross-border knowledge transfers

The reuse of organizational practices in multiple locations is a fundamental way in which MNCs leverage knowledge to seek competitive advantage. Scholars approaching the issue of adaptation from both a market and an institutional perspective argue that, in order to achieve fit with the local environment, some degree of adaptation is advisable, and the need for adaptation increases as the institutional distance between source and recipient locations increases. However, arguments to date have examined the effect of adaptation primarily on a subsidiary's long-term performance. A necessary precursor is to understand the effect of adaptation on the transfer process itself, as transfer difficulty, or stickiness, may preclude the reuse of an organizational practice in the first place. In this paper, we explore how the adaptation of organizational practices affects the stickiness of cross-border transfers. We use structural equation modeling to analyze data from 122 internal transfers of best practice. Contrary to expectation, we find that adaptation significantly increases, rather than decreases, the stickiness of cross-border knowledge transfer. Journal of International Business Studies (2004) 35, 508–523. doi:10.1057/palgrave.jibs.8400107

Development of archetypes of international marketing strategy

The extant business literature contains three separate characterizations of international marketing strategy: standardization–adaptation, concentration–dispersion, and integration–independence. These characterizations have, for decades, informed researchers, students, and practitioners alike of the strategic options a multinational firm might have in formulating its cross-border marketing approaches. Although useful, these characterizations have yet to be unified within an integrative classification scheme that considers the gestalt combinatorial patterns along multiple strategy dimensions. Toward creating such a classification scheme, this paper proposes a holistic conceptualization of international marketing strategy grounded in configurational theory, whereby strategies are viewed as multidimensional archetypes. We present evidence of three distinct international marketing strategy archetypes obtained through an exploratory case coding/clustering study. After discussing the characteristics, possible drivers, and contingent performance potentials of these archetypes, we offer directions for future research. Journal of International Business Studies (2006) 37, 499–524. doi:10.1057/palgrave.jibs.8400206