Effects of natural and human-derived stressors on reproduction and development of marine organisms. We utilize developing systems as sensitive yet simple models for understanding mechanisms of toxicity and environmental stress. In addition, we investigate the physiological mechanisms by which these systems tolerate environmental stress. Molecules and physiological mechanisms involved in fertilization and early development. Impacts of pollutants and altered habitats on early life stages that may ultimately lead to changes in populations. Natural and anthropogenic stressors.