Current interest and debate on pollen-assemblage richness as a proxy for past plant
richness have prompted us to review recent developments in assessing whether modern …

Abstract Biotic Immigration Events (BIMEs) record the large-scale dispersal of taxa from one
biogeographic area to another and have significantly impacted biodiversity throughout …

Aim Differentiation of sites or communities is often measured by partitioning regional or
gamma diversity into additive or multiplicative alpha and beta components. The beta …

Two conflicting hypotheses have been proposed to explain large‐scale species diversity
patterns and dynamics. The unbounded hypothesis proposes that regional diversity …

Despite extensive paleoecological analyses of spatial and temporal turnover in species
composition, the fidelity with which time-averaged death assemblages capture variation in …

Species invasions are pervasive in Earth history, yet the ecological and evolutionary
consequences vary greatly. Ancient invasion events can be organized in a hierarchy of …

Paired measurements of bulk carbonate (δ 13 C carb), organic matter (δ 13 C org), and their
difference (Δ 13 C) can be used to estimate changes in isotopic fractionation through time as …

Competition theory predicts that multispecies coexistence requires that species have traits
that fall on the same interspecific trade-off surface. Fossil records for mollusks, mammals …

Presented here is a coupled model of the nonmarine fossil record, based on a geometric
model of deposition, a random-branching model of evolution, and an ecological model …

Abstract Biotic Immigration Events in which a group of organisms that originated in one
geographic region invade and become established in a new geographic region are common …