In the Sorraia River Valley (Coruche, Portugal): Settlement Dynamics of Ancient Peasant Societies on the Left Bank of the Lower Tagus River (5500 to 1800 B.C.E.)

This article is the result of archaeological and paleoenvironmental investigations carried out within the scope of the ANSOR project in the Sorraia valley (Coruche), on the left bank of the Lower Tagus. In the analysis of settlement dynamics between 5500 and 1800 a.n.e. we considered four moments: 1) The first peasant societies of the ancient Neolithic; 2) The Middle and Late Neolithic; 3) Chalcolithic; 4) The Early Bronze Age. The Sorraia valley was also framed in the framework of the Center and South of Portugal during the period under analysis. Interpretative models are presented for changes in the implantation patterns in the four stages under study, oscillating between paleoenvironmental factors and the socio-economic changes registered in the old peasant societies.

Epibionts in artificial collectors / Epibiontes en colectores artificiales

Artificial collectors are tools that explain the settlement dynamics of marine invertebrates. What is known about these in the Caribbean is very limited. In order to identify and quantify the diversity of epibionts in relation to depth, between December, 2015 and August, 2016, cylindrical collectors were suspended on a long line at varying depths. At each experimental depth, bimonthly temperature, chlorophyll a, and total seston records were obtained. 7,078 individuals belonging to five phyla were counted: Chordata, Echinodermata, Arthropoda, and Mollusca. The mollusks, mainly bivalves, were the most abundant, represented by: Pinctada imbricata, Pteria colymbus, and Crassotrea rhizophorae. The recruitment of organisms showed significant changes over time, with different fixation patterns. Abundance, wealth, and diversity, in each of the experimental depths were modulated by the temperature and phytoplankton biomass and the seston. The collectors, regardless of depth and time, acted as artificial habitats, reflecting the variety of benthic organisms, mainly mollusks, that naturally share the different environments that surround the southern coast of the Gulf of Cariaco, which could be a dynamic observed in the southeast Caribbean. The Gulf of Cariaco is an important ecosystem service due to the larval supply it provides to the environment, related to the fertility of its waters.

Three decades of pastoralist settlement dynamics in the Ethiopian Omo Delta based on remote sensing data

River deltas provide important livelihoods to local populations, but at the same time are under increasing anthropogenic pressure. The opening of the Gibe III dam on the Omo River in Ethiopia in 2016 attracted international attention due to the importance of the free-flowing River for pastoralist communities in the Omo Delta. Sustainable river basin management requires spatially explicit, long-term information about human settlements to mitigate negative impacts on people’s livelihoods. Based on remote sensing time-series, and supplemented with ground-truthing, we mapped settlement-dynamics of the pastoralist Dasanech tribe. The inhabited area more than doubled from 1992 to 2009. From 2009 to 2019, settlements became more permanent and concentrated in the North of the Delta. Our results indicate that the Omo Delta has overall gained in importance as a livelihood area, but that the livelihoods of the traditionally nomadic people are shifting in the context of increasing investment in infrastructure. Management of future river flow at dams should consider the location and the trajectory of change in downstream settlements.

Settlement dynamics and development of transport communications in Southern Yakutia in late the XX – early XXI centuries

This article examines the settlement dynamics in relation to the development of transport communications using the statistical, comparative geographical, and cartographic methods. A brief characteristics is given to the system of displacement of population of Southern Yakutia in the late XX – early XXI centuries. The analysis employs the materials of the population censuses of 1959, 1970, 1979, 1989, 2002, and 2010, which allows compiling the population maps that reveal the peculiarities of settlement network, their population density and structure. Spatial representation of the data is presented on the example of population displacement maps and development of transport communications in Southern Yakutia as of 1959 and 2010. Comparative analysis maps of different periods demonstrates a three-fold decrease in the number of settlements in Southern Yakutia during the intercensal period (1959–2010) due to liquidation of unpromising villages and change of nomadic lifestyle of the indigenous population to sedentary life in larger rural settlements during the period of Soviet administrative reforms of the late XX century. The emergence of new transport communications is associated with active industrial development of Southern Yakutia; however the territories were affected unevenly. It is established that spatial peculiarities of population displacement in Southern Yakutia in the late XX – early XXI centuries have remained, although the settlement areas of the indigenous small-numbered peoples of the North- the Evenks – have decreased. The study of transport communications on the maps of different periods revealed the dynamics of their development in different historical periods, determining the historical roads, abandoned transport routes, emergence of new types and categories of communication lines, including the network of technological roads of industrial companies used for infrastructure maintenance.

Analysis between ancient human settlements and volcanic landscapes using earth observation and archaeological data

<p>Geological and environmental conditions that influence local topography also affect indirectly the location of human settlement dynamics. Understanding those relationships plays an important role in archaeological research related to the evolution of settlement dynamics. In the lower Tyrrhenian Islands, an important parameter is also the volcanic landscape evolution. This work aims to study the patterns of Neolithic, Cooper and Bronze Age settlements, based on known archaeological sites at the Low Tyrrhenian Islands, and to generate hypotheses about the relations of settlement patterns with the volcanic landscape. To that end, a Web-GIS database was created, which was fed with topographic, geological, geomorphological data and Earth Observation data. Geomorphological analysis, derived from digital elevation models, and earth observation products such as the SENTINEL missions, can provide useful estimations into the processes shaping landscapes and insight into the location and evolution of settlements. The analysis includes a series of different data correlation, from geomorphologic to socioeconomic, integrated by an indicator analysis. A series of thematic maps were developed to interpret why areas were selected to host settlements. Through the use of the database that was developed during the project, a set of indexes have been applied. Those included exposure and vulnerability indices for the inland and coastal areas, but also location and defensibility indices for the archaeological sites. Moreover, baseline maps for future risk estimations through a Multi-Criteria Decision Analysis System (MCDA), have been produced. The Volcanic Islands of the lower Tyrrhenian coast have a volcanic origin and were influenced, and partly still are, by explosive and effusive eruptions of various energy and types, by more or less intense deformational events, often connected with the dynamics of the volcano, and quiescent periods of varying duration. The areas under investigation present different characteristics in their geomorphological but also their societal evolution. Geomorphological data further analyzed in a ternary diagram that indicated the relative influence of each of the parameters in each area. From the diagram, it can be seen that the locations of human activities are strongly affected by past and recent volcanic activity.</p><p>Acknowledgement: This work is part of the Brains2Islands “INDAGINE MULTIDISCIPLINARE NEI CONTESTI INSULARI BASSO TIRRENICI” project Funded by FONDAZIONE CON IL SUD project number 2015-0296</p>