Humans as Components of Ecosystems

This book, a product of the fourth Cary Conference, amply demonstrates the achievement of a major goal of all Cary Conferences. That is, Cary Conferences were conceived to provide a forum for comprehensive discus­ sion of major ecological issues from more philosophical and comprehensive perspectives. The Institute of Ecosystem Studies is proud to make its staff and facilities available on a biennial basis for the purpose of initiating and fostering these important discussions. On the one hand, the influence of humans on ecosystems may be quite obvious, such as when a forest is cut. On the other, humans live within and among ecosystems, but ecologists largely have avoided making detailed and rigorous analyses of the more subtle effects that human activities generate. Indeed, most ecologists have sought out rather pristine or remote areas for study, rather than those which include humans. This book brings together a stimulating mix of disciplines to highlight and evaluate these problems, as well as the opportunities of including humans as integral components in studies of "natural- ecosystems. An exciting dialogue has ensued. Hopefully this book will convey some of the excitement and challenges that were generated at this Cary Conference.

Humans as Components of Ecosystems highlights the importance to ecological studies of incorporating humans and their effects on ecosystems. This book will be of interest to students and researchers in ecology, and to policymakers and environmental managers. In addition, it will inform a range of social scientists about new opportunties for integrating their ideas with those of ecologists.

1 Introduction: Scope and Need for an Ecology of Subtle Human Effects and Populated Areas.- Section I The Human Factor: Perception and Processes.- 2 The History and Present Entanglements of Some General Ecological Perspectives.- 3 An Exceptionally Powerful Biotic Factor.- 4 Environmental Change: The Human Factor.- 5 The Iceberg and the Titanic: Human Economic Behavior in Ecological Models.- 6 Ecosystems and Human Actions.- 7 The Human Component of Ecosystems.- Section II Approaches to the Study of Humans as Components of Ecosystems.- 8 Discovery of the Subtle.- 9 Land-use History and Forest Transformations in Central New England.- 10 Variability in Lake Ecosystems: Complex Responses by the Apical Predator.- 11 Humans as a Component of the Lake Titicaca Ecosystem: A Model System for the Study of Environmental Deterioration.- 12 Nitrogen Loading of Rivers as a Human-Driven Process.- 13 Humans: Capstone Strong Actors in the Past and Present Coastal Ecological Play.- 14 Modification of Nitrogen Cycling at the Regional Scale: The Subtle Effects of Atmospheric Deposition.- 15 The Application of the Ecological Gradient Paradigm to the Study of Urban Effects.- 16 The Process of Plant Colonization in Small Settlements and Large Cities.- 17 Ecological Implications of Landscape Fragmentation.- Section III Implications for Ecosystem Management and Construction.- 18 Integration of Social and Ecological Factors: Dynamic Area Models of Subtle Human Influences on Ecosystems.- 19 Human Influences on Ecosystems: Dealing With Biodiversity.- 20 "Natural" or "Healthy" Ecosystems: Are U.S. National Parks Providing Them?.- 21 Restoration as a Technique for Identifying and Characterizing Human Influences on Ecosystems.- 22 Biosphere 2 and the Study of Human/Ecosystem Dynamics.- SectionIV Overview.- 23 Part I: A Social Scientist's Perspective.- II: A Human Ecologist's Perspective.- III: A Marine Ecologist's Perspective-Humans as Capstone-Species.- IV: A Theoretical Ecologist's Perspective: Toward a Unified Paradigm for Subtle Human Effects and an Ecology of Populated Areas.- 24 Humans as Components of Ecosystems: A Synthesis.