Habitat destruction resulting from human activity is a serious threat to biodiversity. The model developed by Tilman et al. [Tilman, D., May, R.M., Lehman, C.L., Nowak, M.A., 1994. Habitat destruction and the extinction debt. Nature 371, 65-66] has become an important tool for analyzing persistence of species in habitats under destruction. However, most analysis and applications of this model h...

Humankind has dramatically transformed much of the Earth’s surface and its natural ecosystems. This process is not new—it has been ongoing for millennia—but it has accelerated sharply over the last two centuries, and especially in the last several decades. Today, the loss and degradation of natural habitats can be likened to a war of attrition. Many natural ecosystems are being progressively ra...

Over the past three decades, the burden of responsibility for retirement savings has shifted from employer to employee. Saving for retirement has changed from an insured, employer-provided benefit to an uninsured employee-provided deduction from a paycheck. When retirement planning and investment decision-making is largely relegated to individuals, financial literacy is essential. Financial ill...

Thousands of fossil bird bones from the Hawaiian Islands collected since 1971 include remains of at least 39 species of land birds that are not known to have survived into the historic period; this more than doubles the number of endemic species of land birds previously known from the main islands. Bones were found in deposits of late Quaternary age; most are Holocene and many are contemporaneo...

June 30, 2002 · Emergence Roger Strand Strand R. Complexity, Ideology, and Governance. Emergence: Complexity and Organization. 2002 Jun 30 [last modified: 2016 Nov 21]. Edition 1. doi: 10.emerg/10.17357.e39b775425bcb7efc31ddadca5742f9e. On the one hand, modern societies have achieved an impressive level of organization and welfare with their great number of highly differentiated institutions an...