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@article{2244924,
author = {Reichard, Martin and Janáč, Michal and Blažek, Radim and Žák, Jakub and Alila, Okinyi David and Polačik, Matej},
article_location = {111 River st, Hoboken 07030-5774, NJ USA},
article_number = {6},
doi = {http://dx.doi.org/10.1002/ece3.8990},
keywords = {Africa; Cyprinodontiformes; dispersal; ephemeral habitats; habitat protection},
language = {eng},
issn = {2045-7758},
journal = {Ecology and Evolution},
title = {Patterns and drivers of Nothobranchius killifish diversity in lowland Tanzania},
url = {https://doi.org/10.1002/ece3.8990},
volume = {12},
year = {2022}
}
TY - JOUR
ID - 2244924
AU - Reichard, Martin - Janáč, Michal - Blažek, Radim - Žák, Jakub - Alila, Okinyi David - Polačik, Matej
PY - 2022
TI - Patterns and drivers of Nothobranchius killifish diversity in lowland Tanzania
JF - Ecology and Evolution
VL - 12
IS - 6
SP - 1-12
EP - 1-12
PB - John Wiley & Sons
SN - 20457758
KW - Africa
KW - Cyprinodontiformes
KW - dispersal
KW - ephemeral habitats
KW - habitat protection
UR - https://doi.org/10.1002/ece3.8990
N2 - Temporary pools are seasonal wetland habitats with specifically adapted biota, including annual Nothobranchius killifishes that survive habitat desiccation as diapausing eggs encased in dry sediment. To understand the patterns in the structure of Nothobranchius assemblages and their potential in wetland conservation, we compared biodiversity components (alpha, beta, and gamma) between regions and estimated the role and sources of nestedness and turnover on their diversity. We sampled Nothobranchius assemblages from 127 pools across seven local regions in lowland Eastern Tanzania over 2 years, using dip net and seine nets. We estimated species composition and richness for each pool, and beta and gamma diversity for each region. We decomposed beta diversity into nestedness and turnover components. We tested nestedness in three main regions (Ruvu, Rufiji, and Mbezi) using the number of decreasing fills metric and compared the roles of pool area, isolation, and altitude on nestedness. A total of 15 species formed assemblages containing 1-6 species. Most Nothobranchius species were endemic to one or two adjacent regions. Regional diversity was highest in the Ruvu, Rufiji, and Mbezi regions. Nestedness was significant in Ruvu and Rufiji, with shared core (N. melanospilus, N. eggersi, and N. janpapi) and common (N. ocellatus and N. annectens) species, and distinctive rare species. Nestedness apparently resulted from selective colonization rather than selective extinction, and local species richness was negatively associated with altitude. The Nothobranchius assemblages in the Mbezi region were not nested, and had many endemic species and the highest beta diversity driven by species turnover. Overall, we found unexpected local variation in the sources of beta diversity (nestedness and turnover) within the study area. The Mbezi region contained the highest diversity and many endemic species, apparently due to repeated colonizations of the region rather than local diversification. We suggest that annual killifish can serve as a flagship taxon for small wetland conservation.
ER -
REICHARD, Martin, Michal JANÁČ, Radim BLAŽEK, Jakub ŽÁK, Okinyi David ALILA a Matej POLAČIK. Patterns and drivers of Nothobranchius killifish diversity in lowland Tanzania. \textit{Ecology and Evolution}. 111 River st, Hoboken 07030-5774, NJ USA: John Wiley \&{} Sons, 2022, roč.~12, č.~6, s.~1-12. ISSN~2045-7758. Dostupné z: https://dx.doi.org/10.1002/ece3.8990.
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