Award: OCE-1915949

This project sought to deepen our understanding of nutrient cycling in Caribbean coral reef ecosystems by focusing on sponges and their symbiotic microbial communities. Through experimental research, student training, and public outreach, the project achieved notable advancements in marine ecology. The findings revealed that Caribbean sponges employ diverse strategies to acquire and recycle nutrients, supporting the hypothesis that resource partitioning minimizes competition among coexisting species. Experimental evidence highlighted efficient nutrient assimilation, with each sponge species demonstrating unique uptake and recycling strategies. These results also emphasize the critical role of sponges in maintaining reef health by returning essential resources to the ecosystem. The research also confirmed the importance of photosymbiontssymbiotic organisms that perform photosynthesisin enabling niche partitioning among sponges. This discovery enhances our understanding of how symbiotic relationships drive ecological diversity in coral reef habitats. Additionally, the project improved the VacuSIP device, a tool for sampling sponge-filtered water, enabling more accurate nutrient cycling studies. This innovation will benefit researchers studying filter feeders worldwide. Beyond ecological insights, the project addressed pressing conservation challenges. By unraveling the mechanisms of nutrient cycling on coral reefs, the findings offer valuable guidance for developing strategies to protect these ecosystems from threats like climate change and human activity. A significant emphasis was placed on education. Graduate and undergraduate students at Middle Tennessee State University (MTSU) gained hands-on experience in fieldwork, laboratory techniques, and data analysis, equipping them for careers in marine science. Furthermore, a specialized course in sponge taxonomy and ecology held in Bocas del Toro, Panama, provided 13 students with direct training in sponge ecology, taxonomy, and systematics. The projects outcomes were widely disseminated through national conferences, local presentations, and peer-reviewed publications. All project data have been made publicly accessible through repositories like the Biological and Chemical Oceanography Data Management Office (BCO-DMO) and the National Center for Biotechnology Information (NCBI), fostering transparency and enabling future research collaborations. In conclusion, this project highlights the interconnectedness of marine organisms, their symbiotic microbes, and their environments, offering a model for interdisciplinary ecological studies. By bridging marine ecology, conservation science, and technological innovation, it demonstrates how foundational research can inform practical solutions. The integration of student training and public outreach ensures the benefits extend beyond academia, contributing to a more scientifically informed and environmentally conscious society. This work not only advanced sponge ecology and nutrient cycling knowledge but also created tools and opportunities with enduring value for science and society. Last Modified: 12/13/2024 Submitted by: ColeGEasson