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Insects and other arthropods in longleaf pine

 

Insects and other arthropods represent a crucial component of the longleaf pine ecosystem. They are decomposers, pollinators, nutrient recyclers, seed dispersers, prey, predators, parasites, and pests. In longleaf pine they do all this on a frequently burned landscape. While fire significantly affects arthropod populations and communities, this varies based on adaptations to fire, location within the forest structure, and land management practices.
Figure 1. A small selection of large, charismatic, and/or abundant insect species previously undocumented in the longleaf pine ecosystem
We reviewed nearly 500 scientific publications from which we tabulated 51 orders, 477 families, 1,949 genera, and 3,032 arthropod species known to occur in longleaf pine ecosystems. This is certainly much lower than the actual total numbers existing in these diverse woodlands. Many groups of arthropods are notably absent or poorly represented in the literature. For example, cicadas, treehoppers, false click beetles, bee flies, and numerous other groups are all represented by a single species, despite having relatively high diversity in North America. (We suspect this is due to gaps in research rather than low diversity in the longleaf pine ecosystem.)
Much research in the past century includes studies of pests of pine, associated arthropods of wildlife, and pollinators, but several other areas of research within this field have received little attention. We demonstrate the clear need for further research on arthropods in longleaf pine, especially over extended periods of time. To address the issue of possible insect declines, and better understand populations in longleaf pine, we initiated the Trends in Arthropod Biodiversity Systems project.
Figure 2. Arthropods of longleaf organized by forest structure. Subterranean (A): gopher tortoise and pocket gopher associates, root-feeders, and insects that pupate in the soil. Forest floor (B): ground beetles, ants, carrion beetles, and those that dwell in leaf litter and coarse woody debris. Herbaceous (C): pollinators, herbivorous insects, parasitoids, quail prey, and ectoparasites. Arboreal (D): Prey of red-cockaded woodpecker, pests, saproxylic insects, and their predators
  • Arthropods of longleaf pine are immensely diverse, functionally important, and severely understudied.
  • As with other taxa of longleaf, fire plays a crucial role in arthropod communities.
  • We tabulated 3,032 arthropod species documented in the literature, but this is certainly an extreme underestimate due to gaps in research.

Sheehan, T.N., and K.D. Klepzig. 2021. Arthropods and fire within the biologically diverse longleaf pine ecosystem. 115(1): 69-94. https://doi.org/10.1093/aesa/saab037

Tom Sheehan, [email protected]

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