Ecologists today recognize that humans are altering the world’s habitats and affecting biodiversity in many ways. Human activity has been linked to rapid declines in the earth’s biodiversity; there is evidence that we are currently in another mass extinction event. Consequently, many ecologists apply their research results, and tailor their research programs, to the conservation of species, communities, populations, or ecosystems. This research is critical in at least three ways: (1) we need to understand how “natural” communities function if we are to understand how our actions disrupt them; (2) we need to understand how heavily altered communities have been affected; and (3) we need to develop priorities and strategies for conserving and restoring communities and ecosystems that have been damaged through our actions. One of the most important steps that we can take to help reverse the loss of biodiversity is to raise awareness of the problem and the solutions that can help reverse the damage. Therefore, in this class you will be responsible for writing a report and giving an oral presentation on the ways in which humans threaten the world’s biodiversity, and potential solutions to these problems. For this assignment, you will collaborate with your group members to select a threat to biodiversity that interests you. Each individual will pick a different ecosystem to write his/her paper about. The paper will discuss how that threat is currently affecting the organisms, trophic interactions, nutrient cycles, and subsequent biodiversity in the selected ecosystem. The focus of the paper is not how humans cause or influence on the threat to biodiversity.