Convergent evolution occurs on all levels, from tiny organic molecules to entire ecosystems of species.

Mediterranean-type ecosystems have provided ecologists with some of the most scientifically-rewarding opportunities to formulate and evaluate hypotheses about large and small-scale ecological phenomena. Comparison of mediterranean-type climate ecosystems in different parts of the world has not only permitted a strong test for ecological convergence, but also critical understanding of key ecophysiological and population processes.

Both fire and climatic variability have monumental impacts on the dynamics of temperate ecosystems. These impacts can sometimes be extreme or devastating as seen in recent El Nino/La Nina cycles and in uncontrolled fire occurrences. This volume brings together research conducted in western North and South America, areas of a great deal of collaborative work on the influence of people and climate change on fire regimes. In order to give perspective to patterns of change over time, it emphasizes the integration of paleoecological studies with studies of modern ecosystems. Data from a range of spatial scales, from individual plants to communities and ecosystems to landscape and regional levels, are included. Contributions come from fire ecology, paleoecology, biogeography, paleoclimatology, landscape and ecosystem ecology, ecological modeling, forest management, plant community ecology and plant morphology. The book gives a synthetic overview of methods, data and simulation models for evaluating fire regime processes in forests, shrublands and woodlands and assembles case studies of fire, climate and land use histories. The unique approach of this book gives researchers the benefits of a north-south comparison as well as the integration of paleoecological histories, current ecosystem dynamics and modeling of future changes.

Studies stimulated by the International Biological Program showed total insect faunal biomass and diversity to be greatest in the spring of the year, which matches increased plant growth and flowering at this time. Ground-inhabiting beetle studies indicated the family Tenebrionidae to be overwhelmingly dominant in biomass, but the family Staphylinidae to be richest in species numbers. Ant studies showed the chaparral community to be rich in ant species; seed gatherers were particularly important. Flower-visiting insects are more abundant and more species-rich in chaparral than in any other type of California vegetation. Bees especially are abundant and diversified and are responsible for most pollination. Postfire succession studies of insects indicate that the abundance of predators and flower visitors sharply increases following fire; parasitic and phytophagous insects (other than flower-visitors) increase more slowly. Insect herbivory appears to affect succession minimally.

The diversity of the earth's climates superimposed upon a complex configuration of physical features has provided the conditions for the evolution of a remarkable array of living things which are linked together into complex ecosystems. The kinds of organisms comprising the ecosystems of the world, and the nature of their interactions, have constantly changed through time due to coevolutionary interactions along with the effects of a continually changing physical environ ment. In recent evolutionary time there has been a dramatic and ever-accelerating rate of change in the configuration of these ecosystems because of the increasing influence of human beings. These changes range from subtle modifications caused by anthropogenically induced alterations in atmospheric properties to the total destruction of ecosystems. Many of these modifications have provided the fuel, food, and fiber which have allowed the expansion of human populations. Unfortunately, there have been many unanticipated changes which accompanied these modifications which have had effects detrimental to human welfare in cluding substantial changes in water and air quality. For example, the use of high-sulfur coal to produce energy in parts of North America is altering the properties of freshwater lakes and forests because of acidification.

A wide-ranging exploration of the diverse historical connections between Chile and California This groundbreaking history explores the many unrecognized, enduring linkages between the state of California and the country of Chile. The book begins in 1786, when a French expedition brought the potato from Chile to California, and it concludes with Chilean president Michelle Bachelet's diplomatic visit to the Golden State in 2008. During the intervening centuries, new crops, foods, fertilizers, mining technologies, laborers, and ideas from Chile radically altered California's development. In turn, Californian systems of servitude, exotic species, educational programs, and capitalist development strategies dramatically shaped Chilean history. Edward Dallam Melillo develops a new set of historical perspectives--tracing eastward-moving trends in U.S. history, uncovering South American influences on North America's development, and reframing the Western Hemisphere from a Pacific vantage point. His innovative approach yields transnational insights and recovers long-forgotten connections between the peoples and ecosystems of Chile and California.