Root-feeding nematodes may play an important role in generating spatial and temporal variation in natural plant communities, but little is known about the performance of the nematodes in the plant root zone. We studied the emergence, survival and reproductive success of the cyst nematode Heterodera arenaria, a root feeding-specialist that occurs in mobile dunes. The host plants of H. arenaria are buried regularly by windblown sand to which the plants respond by upward clonal expansion. As a consequence, the nematodes have to migrate upwards in the soil profile to find new roots for feeding and reproduction, however, not all juveniles migrate. We tested the hypothesis that the offspring from migrated individuals would perform better than from individuals that remained behind and discuss the advantage of this dualistic behavior. The individual performance of the cyst nematodes was better when their juveniles migrated to the new root layer. In the field, in the new root layer the cysts had more eggs and juveniles than cysts collected from the 1-year-old root layer. Under controlled conditions, cysts from the new root layer released their first juveniles faster than cysts from the 1-year-old root layer. However, the juveniles that do not migrate might be crucial for the persistence of the population. In the past decade in [KEYWORDS: Ammophila arenaria ; Nematode dispersal ; Feeding-specialist ; Nematode life history]
Original languageEnglish
JournalApplied Soil Ecology
Journal publication date2006

ID: 148386