Several explanations for the changed role and self-confidence of cities have been offered, such as the promotion of local responses to migration and diversification by European Union institutions, the evolution of city networks, the questioning of national-level policy frameworks, and the immediate pressures cities face to respond to local diversity.
To assess the epidemiological validity of this population genetic framework, we compared our results with published epidemiological data regarding specific migration and diversification events.
Suggested paths of migration and diversification of P. infestans lineages HERB-1 and US-1.
Essentially pastoralism as a livelihood is a highly complex system in terms of the animals kept, household self-sufficiency, migration strategies and diversification into alternative livelihood options (Davies and Bennett 2007 Mearns 2004 Mulder et al. 2010).
This study indicates, for the first time, that distinct ecotypes of island freshwater fish species may be formed as a consequence of loss of migration and subsequent diversification.
By describing the population structure of these species across their geographical distribution, we attempt to identify their historical migration and patterns of diversification.
Moreover, our time estimation also demonstrates that from approximately 1995 to 2000, wide migration and vast genetic diversification of the H9N2 virus occurred, during which the virus migrated from Hong Kong and Guangdong to many other interior provinces (Jiangsu, Anhui, Shandong etc). of China and formed G1 and Ck/Bei lineages.
As shown in Table 6, the results of the fixed effects regression show that the major adaptation actions that are found to have statistically significant effects on the income of households are water harvesting, livestock diversification, migration and production of hay and straw.
A gene tree of a rapidly radiating group may be subject to incomplete and stochastic lineage sorting, and to overcome this problem we used multi-locus, nuclear AFLP data in comparison with mtDNA sequences to study diversification, migration and introgression in Tropheus colour morphs in Lake Tanganyika.
The westward migration (~7,000 YBP) contributed to the separation and diversification of the Chadic languages in Chad Basin, while the southward migration (~5,000 YBP) contributed to the diversification of Cushitic languages in Eastern Africa [ 10, 8, 6].
Figure 8 shows that there has been a recent acceleration and diversification of extra-continental migration from sub-Saharan Africa, particularly to the United States and Canada.
