1. Stable Isotopes: History Units and Instrumentation. - Section I Ecophysiological Studies in Plants. - 2. Carbon Isotope Fractionation and Plant Water-Use Efficiency. - 3. Carbon Isotope Ratios and Physiological Processes in Aridland Plants. - 4. Stable Carbon Isotope Ratio as an Index of Water-Use Efficiency in C3 HalophytesPossible Relationship to Strategies for Osmotic Adjustment. - 5. Stable Carbon Isotopes in Vernal Pool Aquatics of Differing Photosynthetic Pathways. - 6. Studies of Mechanisms Affecting the Fractionation of Carbon Isotopes in Photosynthesis. - 7. Intertree Variability of ?I3C in Tree Rings. - 8. Hydrogen Isotope Fractionation in Plant Tissues. - 9. Oxygen and Hydrogen Isotope Ratios in Plant Cellulose: Mechanisms and Applications. - 10. Stable Hydrogen Isotope Ratios in Plants: A Review of Current Theory and Some Potential Applications. - Section II Animal Food Webs and Feeding Ecology. - 11. Stable Carbon Isotopes in Terrestrial Ecosystem Research. - 12. ?13C Measurements as Indicators of Carbon Flow in Marine and Freshwater Ecosystems. - 13. Natural Carbon Isotope Tracers in Arctic Aquatic Food Webs. - 14. Some Problems and Potentials of Strontium Isotope Analysis for Human and Animal Ecology. - 15. Natural Isotope Abundances in Bowhead Whale (Balaena mysticetus) Baleen: Markers of Aging and Habitat Usage. - 16. Doubly-Labeled Water Studies of Vertebrate Physiological Ecology. - 17. A ?13C and ?15N Tracer Study of Nutrition in Aquaculture: Penaeus vannamei in a Pond Growout System. - Section III Ecosystem Process Studies. - 18. Stable Isotope Ratios and the Dynamics of Caliche in Desert Soils. - 19. The Use of Stable Isotopes in Assessing the Effect of Agriculture on Arid and Semi-Arid Soils. - 20. Estimates of N2 Fixation in Ecosystems: The Need for andBasis of the 15N Natural Abundance Method. - 21. The Use of Variation in the Natural Abundance of 15N to Assess Symbiotic Nitrogen Fixation by Woody Plants. - 22. 13C/12C Ratios in Atmospheric Methane and Some of Its Sources. - 23. Temperature-Dependent Hydrogen Isotope Fractionation in Cyanobacterial Sheaths: Applications to Studies of Modern and Precambrian Stromatolites. - 24. Sulfur Isotope Studies of the Pedosphere and Biosphere. - 25. Sulfate Fertilization and Changes in Stable Sulfur Isotopic Compositions of Lake Sediments. - 26. The Use of Stable Sulfur and Nitrogen Isotopes in Studies of Plant Responses to Air Pollution. - 27. The Use of Stable Sulfur Isotope Ratios in Air Pollution Studies: An Ecosystem Approach in South Florida. - 28. 87Sr/86Sr Ratios Measure the Sources and Flow of Strontium in Terrestrial Ecosystems. Language: English