Herzog, QT; Tittgen, C; Laforsch, C: Predator specific reversibility of morphological defenses in Daphnia barbata, Journal of Plankton Research, 1-10 (2016), online: 20.06.2016, doi:10.1093/plankt/fbw045
Stichworte: Daphnia; inducible defenses; phenotypic plasticity; reversibility; morphological defenses; induced defenses; Daphnia barbata; Triops; Notonecta; morphological plasticity
Abstract:
Inducible defenses are a common phenotypically plastic response to a heterogeneous predation risk. Once induced, these defenses cannot only lose their benefit, but even become costly, should the predator disappear. Consequently, some organisms have developed the ability to reverse their defensive traits. However, despite extensive research on inducible defenses, reports on reversibility are rare and mostly concentrate on defensive behavior. In our study, we investigated the reversibility of morphological defenses in the freshwater crustacean Daphnia barbata. This species responds to Notonecta glauca and Triops cancriformis with two distinctively defended morphotypes. Within the numerous defensive traits, we found both trait- and predator-specific reversibility. Body torsion and tail-spine-related traits were highly reversible, whereas helmet-related traits remained stable, suggesting different physiological constraints. However, in general, we found the defenses against Triops mostly reversible, while Notonecta-induced defenses were persistent and grew further, even in the absence of a predator.
Aktuelle Termine



Antrittsvorlesung:
Mi. 24.01.2018
Die kleinen Geheimnisse im Untergrund des Fichtelgebirges
BayCEER-Kolloquium:
Do. 18.01.2018
Effects of climate change on plants and ecosystem functioning of managed temperate grasslands
Expertengespräch:
Mo. 22.01.2018
Round table discussion "Scientific Coordination"
Ökologisch-Botanischer Garten:
So. 21.01.2018
Leibniz, die Welt und wir: Ausstellungsrundgang mit Monika Stock
So. 21.01.2018
Landschaften und Kulturen entlang der Seidenstraße in Westchina, Vortrag von Dr. Andreas von Heßberg
Wetter Versuchsflächen
Luftdruck (356m): 950.1 hPa
Lufttemperatur: 4.3 °C
Niederschlag: 11.3 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 18.6 km/h
Wind (Max.): 43.9 km/h
Windrichtung: W

...mehr
Globalstrahlung: 32 W/m²
Lufttemperatur: 1.3 °C
Niederschlag: 15.6 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 32m): 19.8 km/h
Wind (Max.): 47.7 km/h

...mehr