The recent rise of African communities in Guangzhou has been widely noted. To understand this ‘Chocolate City,’ with a series of field surveys in 2006-2010, we examine its different development stages and shed particular light upon its internal and external linkages. Three modalities: the emerging enclave, the prosperous enclave and the collapsing enclave, have been identified. The rise of the ‘Chocolate City’ has been mainly attributed to the rise of Sino-Africa trading and the efforts of local entrepreneurs. The prosperity of the City was backed by the local states. However, the involvement of local polices, the reform of the local immigration regime and the deterioration of economic relations resulted in its recent collapse. We argue that this ‘Chocolate City’ is a restructuring ethnic enclave underlying the impacts of ‘transient glocalization.’ The rise and fall of the ‘Chocolate City’ indicates the dynamic relations between the transient global-local nexus, immigration regime, and local geography.
The black-spined toad, Duttaphrynus melanostictus, is widespread in South and South-East (SE) Asia, although recent molecular analyses have revealed that it represents a species complex (here called the D. melanostictus complex). Invasive populations of this toad have been detected in Madagascar since, at least, 2014. We here trace the origin of this introduction based on mitochondrial DNA sequences of 340 samples. All 102 specimens from Madagascar have identical sequences pointing to a single introduction event. Their haplotype corresponds to a lineage occurring in Cambodia, China, Laos, Thailand, Vietnam, and some locations of eastern Myanmar and northern Malaysia, here named the SE Asian lineage. Within this lineage, specimens from one location in Cambodia and three locations in Vietnam have the same haplotype as found in Madagascar. This includes Ho Chi Minh City, which has a major seaport and might have been the source for the introduction. Species distribution models suggest that the current range of the Madagascan invasive population is within the bioclimatic space occupied by the SE Asian lineage in its native range. The potential invasion zone in Madagascar is narrower than suggested by models from localities representing the full range of the D. melanostictus complex. Thus, an accurate taxonomy is essential for such inferences, but it remains uncertain if the toad might be able to spread beyond the potential suitable range because (1) knowledge on species-delimitation of the complex is insufficient, and (2) the native range in SE Asia might be influenced by historical biogeography or competition.