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This activity accompanies the Science Bulletins documentary Seeking Spiders: Biodiversity on a Different Scale.
Recognizing the tiny species of any ecosystem is hugely important for defining its overall diversity. But miniscule forms of life are often invisible to conservation efforts because they have yet to be described in detail. Dr. Norman Platnick of the American Museum of Natural History is leading an important initiative to discover biodiversity on a smaller scale. Having devoted decades to the study of spiders, Dr. Platnick now leads a team of 45 investigators from 10 countries in the largest-ever research project on spiders, identifying members of the goblin spider family. This group of spiders is widely distributed but largely unknown, primarily due to their small size—at 1.2-3mm, they measure one-half to one-third the length of the average spider. This video follows Dr. Platnick’s team into the Ecuadorian jungle as they collect and identify scores of unrecognized goblin spiders, showing how little we know about the full breadth of global biodiversity.
Call on students to share what they know about biodiversity. Elicit that biodiversity includes plants, animals, microorganisms, as well as the different ecosystems on Earth. Ask students why biodiversity is important. (Answers may include: Biodiversity is important to ecosystems because each species has an important role to play. Species, including humans, depend on other species.) Explain that in the video they are about to see students will learn about the work of one scientist who is leading an important initiative to discover and describe tiny goblin spiders, a little known family of spiders, in a remote area of Ecuador.
Have students watch the video and take notes. Use the following questions to guide a class discussion.
Dr. Platnik stated, “Conservation decisions are always judgments. Obviously we can’t save everything on the planet. We have a triage situation. We have to decide what is most important to save.” What do you think is most important to save? Why? (Responses will vary.)
For a printable version of this activity, download the file below: