PBGJAM is an interactive web-based tool that provides forecasts of species and community responses to climate change for birds, plants, small mammals, and insects. It incorporates data from the Breeding Bird Survey (BBS), the National Ecological Observatory Network (NEON), eBird, and the US Forest Inventory Analysis (FIA).
How Much Carbon Will America's Future Forests Hold?
Warm, dry conditions are causing established forests to move away from historical ranges and into formerly inhospitable terrain. What will that mean for America's carbon sequestering future? See for yourself with an interactive map.
Uncovering Variation in Forest Elephant Seed Shadows
We use gut passage estimates and GPS tracking from 56 wild elephants in Gabon to understand the causes and consequences of variation in forest elephant seed shadows.
Comparing Trait Responses Across Continents
We compared the responses of community weighted traits to a common set of environmental covariates from two ecologically and climatically similar regions—forests in North America and Western Europe, explicitly accounting for their joint relationships to one another and the different scales on which each trait is measured.
The Importance of Large Trees for Carbon Estimation in Gabon
Using inventory data from 104 plots, we estimated the first nationwide above ground carbon estimation for the country of Gabon. Combined with measurements of coarse woody debris and soil carbon from the same sites, forest carbon is estimated to be twice the global average for moist tropical forests.
Integrating Camera Trap, Visual, and Dung Survey Data
Accurate estimations of animal populations are necessary for management, conservation, and policy decisions. However, methods for surveying animal communities disproportionately represent specific groups or guilds. We present a modelling framework that both compares and integrates field-collected dung, visual, and camera trap data to more robustly estimate animal populations in data-scarce environments.
Landscape-level Validation of Allometry and the Importance of Soils
Accepted, Ecological Application
We use inventory data to fit the most commonly used diameter:height models at several scales and assess which abiotic, anthropogenic and topographical covariates contribute the most to bias in height estimation at the landscape scale. Finally, we determine the implications of model scale for the estimation of above-ground biomass to determine the best D:H models for tropical forest in Central Africa.
How to Estimate the Gut Passage Time of Wild Forest Elephants
In Press, Wildlife Biology
Knowledge of gut passage time is essential for understanding vertebrate-mediated ecological processes like seed dispersal. We apply and compare three novel methods -- modified seeds, colored plastic pellets, and Thermocron temperature logging iButtons -- to estimate the gut passage time in wild forest elephants for the first time.
Exploring the Unacknowledged Dimension of Habitat Variability
Ecological Monographs (2019)
Highly-variable, synchronous seed production in forests provides a pulsed resource that both supports and destabilizes food webs. We provide a model that combines knowledge of consumer life histories with the emergent space-time covariance structure of fruit and seed production to assess the ability of habitats to provide for important consumer groups.
Long Term Effects of Low-Intensity Logging on Seed Dispersal
Annals of Botany, Plants (2018)
Low intensity logging has been proposed as a sustainable solution for timber harvesting in the tropics, but long-term alterations in seed dispersal may have big effects on community composition and ecosystem function.
Forest Elephant Extirpation Will Transform African Forests
Conservation Biology (2018)
Large herbivores like forest elephants might be the only thing keeping Afrotropical forests from turning into the Neotropics, and they're headed for extinction.
The Joint Responses of Growth and Survival to Adversity
American Journal of Primatology (2015)
We've long suspected that later-born infants fare better than first-born siblings, but 34 years of macaque survival data suggests otherwise.