Research to help curb biodiversity loss By Britt Lewis | June 06, 2012 Researcher measuring the productivity of algae in a stream. Researchers measure how changing estuarine food webs influence sediment biogeochemistry at a Chesapeake Bay site. Students measuring ecosystem production in an estuarine biodiversity experiment. Biological diversity of algae that helps produce oxygen in lakes. Researcher sampling at a stream biodiversity experiment. Serpentine grasslands, like this one south of San Jose, Calif., are hotspots of plant diversity but are threatened by habitat encroachment, air pollution, and invasive species. Native wildflowers dominate in California serpentine grasslands, but invasive grasses from Europe and Asia are encroaching more and more. Western Washington University biology professor David Hooper and graduate student Leslie Gonzalez measure plant diversity and productivity in experimental grassland plots in California.