Please use this identifier to cite or link to this item:
|Title:||Prey and predator density-dependent interactions under different water volumes.||Authors:||Dalu, Tatenda.
School of Biology and Environmental Sciences
|Keywords:||Antagonism.;Consumer–resource.;Functional response.;Mltiple predator effects.;Temporary pond.;Zooplankton.||Issue Date:||2021||Publisher:||Wiley||Abstract:||Predation is a critical ecological process that directly and indirectly mediates population stabilities, as well as ecosystem structure and function. The strength of interactions between predators and prey may be mediated by multiple density dependences concerning numbers of predators and prey. In temporary wetland ecosystems in particular, fluctuating water volumes may alter predation rates through differing search space and prey encounter rates. Using a functional response approach, we examined the influence of predator and prey densities on interaction strengths of the temporary pond specialist copepod Lovenula raynerae preying on cladoceran prey, Daphnia pulex, under contrasting water volumes. Further, using a population dynamic modeling approach, we quantified multiple predator effects across differences in prey density and water volume. Predators exhibited type II functional responses under both water volumes, with significant antagonistic multiple predator effects (i.e., antagonisms) exhibited overall. The strengths of antagonistic interactions were, however, enhanced under reduced water volumes and at intermediate prey densities. These findings indicate important biotic and abiotic contexts that mediate predator-prey dynamics, whereby multiple predator effects are contingent on both prey density and search area characteristics. In particular, reduced search areas (i.e., water volumes) under intermediate prey densities could enhance antagonisms by heightening predator-predator interference effects.||Description:||Please note that only UMP researchers are shown in the metadata. To access the co-authors, please view the full text.||URI:||https://openscholar.ump.ac.za/handle/20.500.12714/431||DOI:||10.1002/ece3.7503|
|Appears in Collections:||Journal articles|
Show full item record
Files in This Item:
|Prey-and-predator-density‐dependent-interactions-under-different-water-volumes.pdf||Published version||433.93 kB||Adobe PDF||View/Open|
Items in UMP Scholarship are protected by copyright, with all rights reserved, unless otherwise indicated.