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Spatial and Temporal Characteristics of Pastoral Mobility in the Far North Region, Cameroon: Data Analysis and Modeling.

Xiao N, Cai S, Moritz M, Garabed R, Pomeroy LW - PLoS ONE (2015)

Bottom Line: Modes M3 and M4 on the other hand are the situations when pastoralists stay in a campsite for a relatively short period of time (<20 days) when moving between seasonal grazing areas.These four modes are used to develop a spatial-temporal mobility (STM) model that can be used to estimate the probability of a mobile pastoralist residing at a location at any time.We compare the STM model with two reference models and the experiments suggest that the STM model can effectively capture and predict the space-time dynamics of pastoral mobility in our study area.

View Article: PubMed Central - PubMed

Affiliation: Department of Geography, The Ohio State University, Columbus, OH, United States of America.

ABSTRACT
Modeling the movements of humans and animals is critical to understanding the transmission of infectious diseases in complex social and ecological systems. In this paper, we focus on the movements of pastoralists in the Far North Region of Cameroon, who follow an annual transhumance by moving between rainy and dry season pastures. Describing, summarizing, and modeling the transhumance movements in the region are important steps for understanding the role these movements may play in the transmission of infectious diseases affecting humans and animals. We collected data on this transhumance system for four years using a combination of surveys and GPS mapping. An analysis on the spatial and temporal characteristics of pastoral mobility suggests four transhumance modes, each with its own properties. Modes M1 and M2 represent the type of transhumance movements where pastoralists settle in a campsite for a relatively long period of time (≥20 days) and then move around the area without specific directions within a seasonal grazing area. Modes M3 and M4 on the other hand are the situations when pastoralists stay in a campsite for a relatively short period of time (<20 days) when moving between seasonal grazing areas. These four modes are used to develop a spatial-temporal mobility (STM) model that can be used to estimate the probability of a mobile pastoralist residing at a location at any time. We compare the STM model with two reference models and the experiments suggest that the STM model can effectively capture and predict the space-time dynamics of pastoral mobility in our study area.

No MeSH data available.


Related in: MedlinePlus

Cumulative distributions of the days of stay.The dashed vertical line indicates the stay of 20 days.
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pone.0131697.g002: Cumulative distributions of the days of stay.The dashed vertical line indicates the stay of 20 days.

Mentions: Fig 2 shows the cumulative frequency of the duration the pastoralists stayed in each campsite in each season in the four years of our data. It is clear that in the end and beginning of the rainy season, the pastoralists tended to stay at each location in a relatively short amount of time as more than 95 percent of the stays are shorter than 20 days. On the other hand, in the rainy and dry (both cold and hot) seasons, many stays were longer as more than 15 percent of the stays were longer than 20 days. The 15 percent of the stays is significant, accounting for the majority of the days when these pastoralists stayed in their sojourn camps during these seasons. Fig 3 shows all the 71 transhumance routes in our data in year 2007–2008 with the locations of the campsites colored for the seasons, and the stays longer than 20 days are highlighted. We note the sojourn campsites were mainly located in the floodplain, the lands south to Lake Maga, and the rainy season lands in the area around Mindif and Diamaré.


Spatial and Temporal Characteristics of Pastoral Mobility in the Far North Region, Cameroon: Data Analysis and Modeling.

Xiao N, Cai S, Moritz M, Garabed R, Pomeroy LW - PLoS ONE (2015)

Cumulative distributions of the days of stay.The dashed vertical line indicates the stay of 20 days.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4495066&req=5

pone.0131697.g002: Cumulative distributions of the days of stay.The dashed vertical line indicates the stay of 20 days.
Mentions: Fig 2 shows the cumulative frequency of the duration the pastoralists stayed in each campsite in each season in the four years of our data. It is clear that in the end and beginning of the rainy season, the pastoralists tended to stay at each location in a relatively short amount of time as more than 95 percent of the stays are shorter than 20 days. On the other hand, in the rainy and dry (both cold and hot) seasons, many stays were longer as more than 15 percent of the stays were longer than 20 days. The 15 percent of the stays is significant, accounting for the majority of the days when these pastoralists stayed in their sojourn camps during these seasons. Fig 3 shows all the 71 transhumance routes in our data in year 2007–2008 with the locations of the campsites colored for the seasons, and the stays longer than 20 days are highlighted. We note the sojourn campsites were mainly located in the floodplain, the lands south to Lake Maga, and the rainy season lands in the area around Mindif and Diamaré.

Bottom Line: Modes M3 and M4 on the other hand are the situations when pastoralists stay in a campsite for a relatively short period of time (<20 days) when moving between seasonal grazing areas.These four modes are used to develop a spatial-temporal mobility (STM) model that can be used to estimate the probability of a mobile pastoralist residing at a location at any time.We compare the STM model with two reference models and the experiments suggest that the STM model can effectively capture and predict the space-time dynamics of pastoral mobility in our study area.

View Article: PubMed Central - PubMed

Affiliation: Department of Geography, The Ohio State University, Columbus, OH, United States of America.

ABSTRACT
Modeling the movements of humans and animals is critical to understanding the transmission of infectious diseases in complex social and ecological systems. In this paper, we focus on the movements of pastoralists in the Far North Region of Cameroon, who follow an annual transhumance by moving between rainy and dry season pastures. Describing, summarizing, and modeling the transhumance movements in the region are important steps for understanding the role these movements may play in the transmission of infectious diseases affecting humans and animals. We collected data on this transhumance system for four years using a combination of surveys and GPS mapping. An analysis on the spatial and temporal characteristics of pastoral mobility suggests four transhumance modes, each with its own properties. Modes M1 and M2 represent the type of transhumance movements where pastoralists settle in a campsite for a relatively long period of time (≥20 days) and then move around the area without specific directions within a seasonal grazing area. Modes M3 and M4 on the other hand are the situations when pastoralists stay in a campsite for a relatively short period of time (<20 days) when moving between seasonal grazing areas. These four modes are used to develop a spatial-temporal mobility (STM) model that can be used to estimate the probability of a mobile pastoralist residing at a location at any time. We compare the STM model with two reference models and the experiments suggest that the STM model can effectively capture and predict the space-time dynamics of pastoral mobility in our study area.

No MeSH data available.


Related in: MedlinePlus