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Vol. 60, 2021
(update: 2021.10.22; 12.07)
Tolerance to Anhydrobiotic
Conditions Among Two Coexisting Tardigrade Species Differing in Life
Strategies
Milena Roszkowska1,2 ,
Bartłomiej Gołdyn3, Daria Wojciechowska2,4, Jakub
Z. Kosicki5, Edyta Fiałkowska6, Hanna Kmita2,
and Łukasz Kaczmarek1,*
doi:10.6620/ZS.2021.60-74
1Department
of Animal Taxonomy and Ecology, Faculty of Biology, Adam Mickiewicz
University, Poznań, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland.
*Correspondence: Tel: +48606384687. E-mail: kaczmar@amu.edu.pl
(Kaczmarek)
2Department of Bioenergetics, Institute of Molecular
Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz
University, Poznań, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland.
E-mail: mil.roszkowska@gmail.com (Roszkowska); grobysdaria@gmail.com
(Wojciechowska); hanna.kmita@amu.edu.pl (Kmita)
3Department of General Zoology, Faculty of Biology,
Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego 6, 61-614
Poznań, Poland. E-mail: glodny@amu.edu.pl (Gołdyn)
4Department of Macromolecular Physics, Faculty of
Physics, Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego
2, 61-614 Poznań, Poland.
5Department of Avian Biology and Ecology, Faculty of
Biology, Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego
6, 61-614 Poznań, Poland. E-mail: kubako@amu.edu.pl (Kosicki)
6Institute of Environmental Sciences, Jagiellonian
University, Gronostajowa 7, 30-387 Kraków, Poland. E-mail:
edyta.fialkowska@uj.edu.pl (Fiałkowska)
Received 20 October 2020 / Accepted 6
October 2021
Communicated by Benny K.K. Chan
Water availability is one
of the most important factors for terrestrial life. Terrestrial
habitats may periodically become dry, which can be overcome by an
organism’s capability to undergo anhydrobiosis. In animals, this
phenomenon has been reported for invertebrates, with tardigrades being
the best-known. However, different tardigrade species appear to
significantly differ in their anhydrobiotic abilities. While several
studies have addressed this issue, established experimental protocols
for tardigrade dehydration differ both within and among species,
leading
to ambiguous results. Therefore, we apply unified conditions to
estimate intra- and interspecies differences in anhydrobiosis ability
reflected by the return to active life. We analysed Milnesium inceptum and Ramazzottius subanomalus
representing predatory and herbivorous species, respectively, and often
co-occur in the same habitat. The results indicated that the
carnivorous Mil. inceptum
displays better anhydrobiosis survivability than the herbivorous Ram. subanomalus. This tendency to
some degree coincides with the time of “waking up” since Mil. inceptum showed first
movements and full activity of any first individual later than Ram. subanomalus. The movements of
all
individuals were however observed to be faster for Mil. inceptum. Differences between
the experimental groups varying in anhydrobiosis length were also
observed: the longer tun state duration, the more time was necessary to
return to activity.
Key words: Anhydrobiosis,
Cryptobiosis, Milnesium inceptum,
Ramazzottius subanomalus,
Recovery.
Citation: Roszkowska M, Gołdyn B,
Wojciechowska D, Kosicki JZ, Fiałkowska E, Kmita H, Kaczmarek Ł. 2021.
Tolerance to anhydrobiotic conditions among two coexisting tardigrade
species differing in life strategies. Zool Stud 60:74. doi:10.6620/ZS.2021.60-74.
Supplementary
materials: Table
S1丨Table S2
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