2013
Interaction of temperature and an environmental stressor: Moina macrocopa responds with increased body size, increased lifespan, and increased offspring numbers slightly above its temperature optimum
ENGERT, Antonia; Shumon CHAKRABARTI; Nadine SAUL; Michal BITTNER; Ralph MENZEL et. al.Základní údaje
Originální název
Interaction of temperature and an environmental stressor: Moina macrocopa responds with increased body size, increased lifespan, and increased offspring numbers slightly above its temperature optimum
Autoři
ENGERT, Antonia (276 Německo); Shumon CHAKRABARTI (276 Německo); Nadine SAUL (276 Německo, domácí); Michal BITTNER (203 Česká republika, domácí); Ralph MENZEL (276 Německo) a Christian E W STEINBERG (276 Německo, garant)
Vydání
Chemosphere, OXFORD, ENGLAND, PERGAMON-ELSEVIER SCIENCE LTD, 2013, 0045-6535
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10511 Environmental sciences
Stát vydavatele
Velká Británie a Severní Irsko
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 3.499
Kód RIV
RIV/00216224:14310/13:00067963
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000315008600012
Klíčová slova anglicky
Moina macrocopa; Humic substances; Lifespan; Reproduction; Oxidative stress; Mitohormesis
Změněno: 10. 7. 2017 13:24, RNDr. Mgr. Michal Bittner, Ph.D.
Anotace
V originále
For organisms, temperature is one of the most important environmental factors and gains increasing importance due to global warming, since increasing temperatures may pose organisms close to their environmental tolerance limits and, thus, they may become more vulnerable to environmental stressors. We analyzed the temperature-dependence of the water-soluble antioxidant capacity of the cladoceran Moine macrocopa and evaluated its life trait variables with temperature (15, 20, 25, 30 degrees C) and humic substance (HS) concentrations (0, 0.18, 0.36, 0.90, 1.79 mM DOC) as stressors. Temperatures below and above the apparent optimum (20 degrees C) reduced the antioxidative capacity. Additions of HSs increased body length, but decreased mean lifespan at 15 and 20 degrees C. There was no clear HS-effect on offspring numbers at 15, 20, and 30 degrees C. At 25 degrees C with increasing HS-concentration, lifespan was extended and offspring numbers increased tremendously, reaching 250% of the control. Although the applied HS preparation possesses estrogenic and antiandrogenic activities, a xenohormone mechanism does not seem plausible for the reproductive increase, because comparable effects did not occur at other temperatures. A more convincing explanation appears to be the mitohormesis hypothesis which states that a certain increase of reactive oxygen production leads to improved health and longevity and, with Moina, also to increased offspring numbers. Our results suggest that at least with the eurythermic M. macrocopa, a temperature above the optimum can be beneficial for several life trait variables, even when combined with a chemical stressor. Temperatures approximately 10 degrees C above its optimum appear to adversely affect the lifespan and reproduction of M. macrocopa. This indicates that this cladoceran species seems to be able to utilize temperature as an ecological resource in a range slightly above its thermal optimum. (C) 2012 Elsevier Ltd. All rights reserved.
Návaznosti
ED0001/01/01, projekt VaV |
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MSM0021622412, záměr |
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