Informace o publikaci

Diversity, ecology, and community structure of the terrestrial diatom flora from Ulu Peninsula (James Ross Island, NE Antarctic Peninsula)

Autoři	HUTŇAN CHATTOVÁ Barbora CAHOVÁ Tereza PINSEEL Eveline KOPALOVÁ Kateřina KOHLER Tyler J. HRBÁČEK Filip VAN DE VIJVER Bart NÝVLT Daniel
Rok publikování	2022
Druh	Článek v odborném periodiku
Časopis / Zdroj	Polar Biology
Fakulta / Pracoviště MU	Přírodovědecká fakulta
Citace
www	https://link.springer.com/article/10.1007/s00300-022-03038-z
Doi	http://dx.doi.org/10.1007/s00300-022-03038-z
Klíčová slova	Community analysis; Diatoms; Ecology; Soil; James Ross Island; Ulu Peninsula
Popis	Diatoms constitute an important and diverse component of terrestrial protist communities but remain poorly studied, especially in the Antarctic realm. Here, we investigated the diversity and community structure of the terrestrial diatom flora from the Ulu Peninsula, James Ross Island (Maritime Antarctic Region) using a morphology-based dataset and physico-chemical measurements. A total of 97 taxa belonging to 27 genera was identified in 59 samples from terrestrial environments, including soils and rock walls. The flora was dominated by the genera Hantzschia, Luticola, and Humidophila. Eight distinct diatom assemblages could be distinguished and were mainly structured by differences in environmental characteristics such as vegetation coverage, moisture, conductivity, pH, and nutrient concentrations. In general, James Ross Island harboured a unique diatom flora as evidenced by very low similarity values with other (sub-)Antarctic localities. Only 16% of the taxa have a typical cosmopolitan distribution, whereas 70% showed a restricted Antarctic distribution, supporting previous indications of high species-level endemism in environments characterized by harsh abiotic conditions. In addition, several of the cosmopolitan species uncovered in this study might harbour substantial levels of hidden diversity, including endemic taxa, as previously revealed for the Pinnularia borealis species complex on James Ross Island. Taken together, the present study improves our knowledge and understanding of the diversity, ecology, and community structure of the terrestrial diatom flora of Ulu Peninsula and highlights that soils and wet rock walls represent important terrestrial habitats in this transitional zone between Maritime and Continental Antarctica.