The Solitary Bees: Biology, Evolution, Conservation
- E. Youngsteadt
- 12 March 2020
Wild bee abundance declines with urban warming, regardless of floral density
Bee abundance declined by about 41% per °C urban warming, and temperature was among the best predictors of bee abundance and community composition, and local impervious surface and floral density were also important predictors, although only large bees appeared to benefit from high floral density.
Physiological thermal limits predict differential responses of bees to urban heat-island effects
- April L. Hamblin, E. Youngsteadt, M. López-Uribe, S. Frank
- Environmental ScienceBiology Letters
- 1 June 2017
Test the ability of critical thermal maxima (CTmax, a measure of heat tolerance) to predict community responses to urban heat-island effects in Raleigh, NC, USA and suggests solitary species and cavity-nesting species may be most sensitive to climate change.
Seed odor mediates an obligate ant–plant mutualism in Amazonian rainforests
- E. Youngsteadt, S. Nojima, Christopher M. Häberlein, S. Schulz, C. Schal
- Environmental ScienceProceedings of the National Academy of Sciences
- 25 March 2008
It is shown that workers of theAG ant Camponotus femoratus are attracted to odorants emanating from seeds of the AG plant Peperomia macrostachya, and that chemical cues also elicit seed-carrying behavior, and the chemical basis of this important and enigmatic interaction is illuminated.
Urban stress is associated with variation in microbial species composition—but not richness—in Manhattan
The diversity and composition of microbes appears less sensitive to habitat patchiness or urban stress than those of macroorganisms, and may be more resilient to the negative effects of urbanization than has been previously appreciated.
Ad hoc instrumentation methods in ecological studies produce highly biased temperature measurements
- A. Terando, E. Youngsteadt, Emily K. Meineke, S. Prado
- Environmental ScienceEcology and Evolution
- 20 October 2017
The results indicate that, due to variable shielding practices, the ecological literature likely includes highly biased temperature data that cannot be compared directly across studies, and calls for greater standardization in how temperature data are recorded in the field, handled in analyses, and reported in publications.
Fine‐scale heterogeneity across Manhattan's urban habitat mosaic is associated with variation in ant composition and richness
It is suggested that fine‐scale heterogeneity in the chronic stress of urban habitats may be an underappreciated, but important structuring force for urban animal communities.
Species-Specific Seed Dispersal in an Obligate Ant-Plant Mutualism
- E. Youngsteadt, Jeniffer Alvarez Baca, J. Osborne, C. Schal
- Environmental SciencePLoS ONE
- 4 February 2009
This work provides the most extensive empirical evidence of species specificity in the AG mutualism and begins to quantify factors that affect seed fate in order to understand conditions that favor its departure from the typical diffuse model of plant-animal mutualism.
The Effects of Ants on the Entomophagous Butterfly Caterpillar Feniseca tarquinius, and the Putative Role of Chemical Camouflage in the Feniseca–Ant Interaction
Chemical analysis and behavioral assays suggest that chemical camouflage, not physical concealment, is responsible for the ants’ failure to detect and remove F. tarquinius caterpillars from aphid colonies.
Habitat and species identity, not diversity, predict the extent of refuse consumption by urban arthropods
- E. Youngsteadt, R. C. Henderson, A. Savage, Andrew F. Ernst, R. Dunn, S. Frank
- Environmental ScienceGlobal Change Biology
- 1 March 2015
The results suggest that species identity and habitat may be more relevant than diversity for predicting urban ecosystem services, even small green spaces such as street medians that may complement those of larger habitat patches across the urban landscape.