Credit: Bresson Thomas

Archaeological remains of small mammals generally weighing under 1kg, or micromammals, are important as environmental indicators, partly because they tend to specialize in certain habitats and are sensitive to change. Many factors affect their ranges of distribution, including predators, food requirements, competition, fire, shifts in precipitation patterns, and shelter availability. Micromammals such as voles and mice also tend to live in dense populations and have evolved rapidly through high fecundity. Due to these diverse and interrelated factors, the interpretation of micromammal remains—bones and middens, mostly—requires a deep understanding of the rodents’ relationship with its environment. In other words, ecological information is imperative to accurate assessment of archaeological data on micromammals.

But sometimes micromammal remains have answered modern ecological questions. For example, packrat middens in arid North America offer relatively high temporal, spatial, and taxonomic resolution (i.e., small intervals with which to measure time, space, or species range), and contain what is possibly the “richest archive of dated, identified, and well-preserved plant and animal remains in the world” (Pearson & Betancourt 2002, p500). Continue reading →