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Spatial Dynamics in a Host–multiparasitoid Community by Priyanga Amarasekare is a Environmental Science article available to read on EtoBox.

What is Spatial Dynamics in a Host–multiparasitoid Community about?

**1.** The harlequin bug, a herbivore on bladderpod, is attacked by two specialist egg parasitoids __Trissolcus murgantiae__ and __Ooencyrtus johnsonii__. __Ooencyrtus__ can out‐compete __Trissolcus__ in the laboratory, but coexistence is the norm in field populations. Despite the heavy mortality inflicted by the two parasitoids, the host–parasitoid interaction is persistent in all sites that have been studied in southern California. **2.** I manipulated inter‐patch distances in a field experiment to determine whether spatial processes drive parasitoid coexistence and/or host–parasitoid dynamics. I first tested the hypothesis that the parasitoids coexist via a dispersal–competition trade‐off. Both parasitoid species took significantly longer to colonize isolated patches than well‐connected patches, suggesting that they have comparable dispersal abilities. __Ooencyrtus__ did not exclude __Trissolcus__ even when inter‐patch distances were reduced to 25–30% of those observed in natural populations. These data suggest that parasitoid coexistence can occur in the absence of a dispersal advantage to the inferior competitor. **3.** Since the treatments with isolated vs. well‐connected pat

Who reads Spatial Dynamics in a Host–multiparasitoid Community?

Author

Priyanga Amarasekare

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley; JSTOR (ISSN 0021-8790)

Published

2000

Language

EN

Field

Environmental Science (Physical Sciences)