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Fossils from Mille-Logya, Afar, Ethiopia, elucidate the link between Pliocene environmental changes and Homo origins.

ABSTRACT: Several hypotheses posit a link between the origin of Homo and climatic and environmental shifts between 3 and 2.5?Ma. Here we report on new results that shed light on the interplay between tectonics, basin migration and faunal change on the one hand and the fate of Australopithecus afarensis and the evolution of Homo on the other. Fieldwork at the new Mille-Logya site in the Afar, Ethiopia, dated to between 2.914 and 2.443?Ma, provides geological evidence for the northeast migration of the Hadar Basin, extending the record of this lacustrine basin to Mille-Logya. We have identified three new fossiliferous units, suggesting in situ faunal change within this interval. While the fauna in the older unit is comparable to that at Hadar and Dikika, the younger units contain species that indicate more open conditions along with remains of Homo. This suggests that Homo either emerged from Australopithecus during this interval or dispersed into the region as part of a fauna adapted to more open habitats.

SUBMITTER: Alemseged Z

PROVIDER: S-EPMC7237685 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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Fossils from Mille-Logya, Afar, Ethiopia, elucidate the link between Pliocene environmental changes and Homo origins.

Alemseged Zeresenay Z Wynn Jonathan G JG Geraads Denis D Reed Denne D Andrew Barr W W Bobe René R McPherron Shannon P SP Deino Alan A Alene Mulugeta M J Sier Mark M Roman Diana D Mohan Joseph J

Nature communications 20200519 1

Several hypotheses posit a link between the origin of Homo and climatic and environmental shifts between 3 and 2.5 Ma. Here we report on new results that shed light on the interplay between tectonics, basin migration and faunal change on the one hand and the fate of Australopithecus afarensis and the evolution of Homo on the other. Fieldwork at the new Mille-Logya site in the Afar, Ethiopia, dated to between 2.914 and 2.443 Ma, provides geological evidence for the northeast migration of the Hada ...[more]

PMID: 32427848

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Project description:BackgroundTo effectively address the burden of postpartum depression (PPD), it is crucial to gain a comprehensive understanding of its magnitude and the factors associated with it in the pastoral and hot region of the Afar Region. This will help identify the progress made thus far and highlight areas that require further attention to accelerate efforts toward reducing the impact of PPD. Notably, no previous study has examined the prevalence and associated factors of PPD specifically in pastoral communities within Ethiopia, including the Afar Region. Accordingly, we investigated the prevalence and associated factors of PPD among postpartum women in the Afar Region, Northeast Ethiopia.MethodsAn institution-based cross-sectional study was conducted in the Awsi Rasu Zone of Afar Regional State from June to July 2021. The study employed a systematic random sampling method to select a total of 302 postpartum mothers who had visited the Expanded Program of Immunisation (EPI) clinics in public health facilities within the Awsi Rasu Zone of the Afar Region. The measurement of PPD was performed using the Edinburgh Postnatal Depression Scale (EPDS). Multivariable binary logistic regression modelling was used to investigate associations between sociodemographic, obstetric and health service, and psychosocial factors with PPD.ResultsThe overall prevalence of PPD was 37.4% with a 95% confidence interval (CI) from 32.0% to 43.0%. Postpartum women who attained high school education were associated with a lower odds of PPD compared to those who did not attain formal schooling (adjusted odds ratio [AOR] = 0.31; 95% CI: 0.12, 0.82). Postpartum women with a family history of mental illness (AOR = 2.34; 95% CI: 1.24, 4.41), those who had trouble in infant feeding (AOR = 4.26; 95% CI: 2.32, 7.83), and those who experienced intimate partner violence (AOR = 3.09; 95% CI: 1.58, 6.04) were positively associated with PPD.ConclusionThe results of our study revealed that the prevalence of PPD in the Awsi Rasu Zone of the Afar Region is higher than both the national and global averages. The findings also highlighted the need for targeted interventions addressing the needs of pastoral postpartum women who experience various stressors, such as feeding difficulties and intimate partner violence.

Dataset Information

Fossils from Mille-Logya, Afar, Ethiopia, elucidate the link between Pliocene environmental changes and Homo origins.

Publications

Fossils from Mille-Logya, Afar, Ethiopia, elucidate the link between Pliocene environmental changes and Homo origins.

Similar Datasets

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