“…Emergency habitat…”

“…Les idées : leur habitat, leur vie, leurs moeurs, leur organisation…”

Materias: “…Nature. ecosystems and habitats. forests and rainforests…”
Acceso restringido con credenciales UPSA

Tabla de Contenidos: “…Science and the Endangered Species Act -- Copyright -- Preface -- Contents -- Executive Summary -- INTRODUCTION -- THE PRESENT STUDY -- EXTINCTIONS -- THE SPECIES CONCEPT -- HABITAT -- RECOVERY -- CONSERVATION CONFLICTS BETWEEN SPECIES -- ESTIMATING RISK -- MAKING ESA DECISIONS IN THE FACE OF UNCERTAINTY -- TIMING -- BEYOND THE ENDANGERED SPECIES ACT -- SCIENCE, POLICY, AND THE ESA -- 1 Introduction -- HISTORY -- THE PRESENT STUDY -- REFERENCES -- 2 Species Extinctions -- EXTINCTIONS OVER GEOLOGICAL TIME -- PREHISTORIC HUMAN IMPACT ON CONTINENTAL ECOSYSTEMS -- PREHISTORIC HUMAN IMPACT ON ISLAND ECOSYSTEMS -- RELATING THE PAST TO THE PRESENT -- Ecosystem Degradation and Restoration -- Rates of Extinction -- Habitat Loss -- Introduced Species -- CONCLUSIONS AND RECOMMENDATIONS -- REFERENCES -- 3 Species Definitions and the Endangered Species Act -- HISTORICAL USE OF THE TERM SPECIES IN IMPLEMENTATION OF THE ENDANGERED SPECIES ACT -- Introduction -- Zoological Interpretations of Species -- Botanical Interpretations of Species -- HISTORY OF SPECIES CONCEPTS BEFORE AND AFTER THE ENDANGERED SPECIES ACT -- Species Concepts -- Taxonomic Units Below the Rank of Species -- A CONCEPT OF SPECIES FOR THE PURPOSES OF THE ENDANGERED SPECIES ACT -- Introduction -- Evolutionary Units and Their Identification -- Species and Subspecies -- Distinct Population Segments -- Distinctiveness -- Genetic Isolation -- Geographic and Temporal Isolation -- Behavioral and Reproductive Isolation -- Examples of Circumscription of Evolutionary Units -- The Fate of Hybrids under the Evolutionary Unit Concept -- CONCLUSIONS AND RECOMMENDATIONS -- REFERENCES -- 4 The Role of Habitat Conservation and Recovery Planning -- THE IMPORTANCE OF HABITAT -- THE ROLE OF HABITAT CONSERVATION UNDER THE ESA -- CRITICAL HABITAT AND FEDERAL ACTIVITIES -- Survival Habitat…”

Acceso restringido con credenciales UPSA