Ecological Effects of Invasive Arthropod Generalist Predators

Arthropod generalist predators (AGP) are widespread and abundant in both aquatic and terrestrial ecosystems. They feed upon herbivores, detritivores, and predators, and also on plant material and detritus. In turn, AGP serve as prey for larger predators. Several prominent AGP have become invasive wh...

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Bibliographic Details
Published in:Annual review of ecology, evolution, and systematics evolution, and systematics, 2006-01, Vol.37 (1), p.95-122
Main Authors: Snyder, W.E, Evans, E.W
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Ants
arthropod generalist predators
Arthropoda
Beetles
Biological and medical sciences
community ecology
Crabs
Crayfish
Ecological competition
ecological impact
Ecological invasion
Fundamental and applied biological sciences. Psychology
General aspects
Insect colonies
insect ecology
Insecta
Invasive species
Invertebrates
literature reviews
phytophagous insects
Predation
predator-prey relationships
Predators
predatory arthropods
predatory insects
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Summary:Arthropod generalist predators (AGP) are widespread and abundant in both aquatic and terrestrial ecosystems. They feed upon herbivores, detritivores, and predators, and also on plant material and detritus. In turn, AGP serve as prey for larger predators. Several prominent AGP have become invasive when moved by humans beyond their native range. With complex trophic roles, AGP have diverse effects on other species in their introduced ranges. The invaders displace similar native species, primarily through competition, intraguild predation, transmission of disease, and escape from predation and/or parasites. Invasive AGP often reach higher densities and/or biomass than the native predators they replace, sometimes strengthening herbivore regulation when invasive AGP feed on key herbivores, but sometimes weakening herbivore suppression when they eat key predators. The complexity and unpredictability of ecological effects of invasive AGP underscores the high risk of adverse consequences of intentional introductions of these species (e.g., for biological control or aquaculture).
ISSN:1543-592X
1545-2069
DOI:10.1146/annurev.ecolsys.37.091305.110107