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

BayCEER-Kolloquium:
Do. 23.04.2020
Physical constraints and biological controls of plant-environment interactions
Ökologisch-Botanischer Garten:
So. 05.04.2020
Entfällt: 3x3=9: Wildkräuter für die Gründonnerstagssuppe
Fr. 17.04.2020
Entfällt: Mit tausend Schritten durch die Erdgeschichte: Gesteine im ÖBG
So. 19.04.2020
Entfällt: Der ÖBG zum Kennenlernen: Allgemeine Gartenführung
So. 26.04.2020
Von Sängern und Spöttern: Vogelstimmen im ÖBG (zusammen mit dem LBV)
BayCEER Blog
13.01.2020
Why Science Communication?
24.05.2019
Stoichiometric controls of C and N cycling
07.05.2019
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
07.05.2019
EGU – interesting research and free coffee
RSS Blog als RSS Feed
Wetter Versuchsflächen
Luftdruck (356m): 982.6 hPa
Lufttemperatur: 3.3 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 9.6 km/h
Wind (Max.): 22.7 km/h
Windrichtung: N

...mehr
Globalstrahlung: 655 W/m²
Lufttemperatur: -0.9 °C
Niederschlag: 0.2 mm/24h
Sonnenschein: 1 h/d
Wind (Höhe 32m): 11.6 km/h

...mehr
Diese Webseite verwendet Cookies. weitere Informationen