Sammanfattning

Despite its biogeographical uniqueness, where two vast savanna regions are separated by the Afromontane mosaic vegetation, there is a significant lack of small mammal sampling in the Tigray region of Ethiopia. Leveraging all our available data on rodents and shrews in the region, we tested the hypothesis that the Afromontane mosaic vegetation in the highlands acts as a barrier to gene flow between taxa found in the Somali-Masai and Sudanian savanna in the southeast and western lowland parts of the region, respectively. Morphological and DNA sequence analysis confirmed the presence of 23 species of small rodents and shrews in the region. We recorded 18 of these species in the Afromontane mosaic vegetation, seven species in the Sudanian savanna, and four species in the Somali-Masai savanna. Notably, the fauna of the Sudanian savanna was strikingly different from that of the Somali-Masai savanna at both intraspecific and interspecific levels, suggesting the northern Ethiopian highlands as a very strong biogeographic barrier for taxa adapted to arid lowlands. However, the reported species diversity remains provisional, and additional sampling from unexplored areas is needed. Furthermore, some of the reported taxa, in this study, such as Mus cf. tenellus, Crocidura cf. fuscomurina, Dendromus sp. indet. 2, and Otomys cf. cheesmani, require detailed taxonomic investigation and may represent new species. A robust understanding of the taxonomic diversity and distribution of the small mammals in the region is crucial for effective conservation planning as well as for addressing practical questions related to rodents, such as in public health and pest management.

Nyckelord

Ethiopian highlands; Somali-masai savanna; Sudanian savanna; Rodents; Shrews

Publicerad i

Biodiversity and Conservation
2024, Volym: 33, nummer: 4, sidor: 1459–1478
Utgivare: SPRINGER

SLU författare

• Meheretu, Yonas

  • Institutionen för vilt, fisk och miljö, Sveriges lantbruksuniversitet
    
  • Mekelle University

UKÄ forskningsämne

Ekologi
Zoologi


Publikationens identifierare

DOI: https://doi.org/10.1007/s10531-024-02811-2

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/129191