Data from: Multiple natural enemies cause distance-dependent mortality at the seed-to-seedling transition
Fricke, Evan C., University of Washington
Tewksbury, Joshua J., University of Washington
Rogers, Haldre S., Rice University
Published Oct 28, 2016 on Dryad.
Cite this dataset
Fricke, Evan C.; Tewksbury, Joshua J.; Rogers, Haldre S. (2016). Data from: Multiple natural enemies cause distance-dependent mortality at the seed-to-seedling transition [Dataset]. Dryad. https://doi.org/10.5061/dryad.8qg42
Specialised natural enemies maintain forest diversity by reducing tree survival in a density- or distance-dependent manner. Fungal pathogens, insects and mammals are the enemy types most commonly hypothesised to cause this phenomenon. Still, their relative importance remains largely unknown, as robust manipulative experiments have generally targeted a single enemy type and life history stage. Here, we use fungicide, insecticide and physical exclosure treatments to isolate the impacts of each enemy type on two life history stages (germination and early seedling survival) in three tropical tree species. Distance dependence was evident for five of six species-stage combinations, with each enemy type causing distance dependence for at least one species stage and their importance varying widely between species and stages. Rather than implicating one enemy type as the primary agent of this phenomenon, our field experiments suggest that multiple agents acting at different life stages collectively contribute to this diversity-promoting mechanism.
Data and code
Zipped folder containing data from field experiments on seeds and seedlings under fungicide, insecticide, and mammal exclusion treatments and R scripts for analysis.