Joseph A. Tobias

The paper shows that greater intraspecific morphological variation in bulbuls predicts broader ecological niches and larger geographic ranges.

This study uses Bayesian phylogenetic models to analyze song complexity in suboscine birds, finding that sexual selection reduces complexity while territoriality increases it, challenging the dominance of sexual selection as the primary driver.

The paper shows that shifting baselines can lead to underestimating biodiversity loss due to changes in species composition over time, particularly in smaller forests.

Across 1281 bird assemblages and 3696 species, land-use change lowers functional redundancy and resistance to simulated extinctions despite lower vulnerability, hitting frugivores and invertivores hardest.

The paper introduces a functional Red List Index (fRLI) to monitor functional diversity trends by weighting species by morphological uniqueness, finding higher extinction risk for locally unique species.

The paper examines the relationship between evolutionary age and range size in species, finding that age correlates with larger ranges but this effect is modulated by insularity and dispersal ability.

This study shows that global bird diversity conservation needs both threat reduction and targeted recovery programs to prevent extinctions and functional diversity loss.

This study finds that avian wing morphology changes with elevation, showing increased wing elongation and area at higher elevations, supporting aerodynamic constraints as a driver of trait evolution.

This study decomposes evolutionary rates in birds to identify drivers of genomic change, finding clutch size, generation length, and beak shape predict mutation rates, with rapid evolution linked to meiosis, heart function, and ecological diversification.

The paper assesses how land use configuration modifies climate change risks to gallery forests in a savannah ecosystem, showing elevated risks in protected areas due to interactions between rainfall change and cropland distribution.

This study projects declines in plant-frugivore interaction diversity under climate change, with potential mitigation through bird dispersal and dietary flexibility.

This study shows that bird beak and body shapes are constrained by biophysical trade-offs, leading to specialized forms and faster evolutionary turnover at the extremes of morphospace.

The paper quantifies sexual selection intensity across bird species globally, showing latitudinal gradients influenced by climate and ecological factors.

This paper introduces a metric called FIRE to prioritize conservation of functionally irreplaceable species at risk of extinction by integrating trait data and extinction risk.

The paper shows that slow and fast functional strategies manifest at the ecosystem level, driven by disturbance and resource availability in grassland communities.

The paper quantifies defaunation of seed-dispersing birds in degraded tropical forests and finds reduced functional trait diversity and limited seed dispersal potential in degraded areas.