Where the River Meets the Sea
(designed for mouth of Pajaro River)
Focus: Importance of estuaries, marine sanctuaries, marine debris, and endangered species
Materials: Binoculars, Journals, Magnifying Lenses, Field Guide to Birds (and Plants if possible), photos of Western Snowy Plover, supplies and directions for Trash Time Line
Procedure:
Gather in a place that affords a view of the surrounding hills and discuss watershed structure and the connectivity of waterways. Reflect on earlier outdoor learning experiences and invite guesses about what the water quality might be like near the mouth of the river.
Background questions:
What is an estuary?
The simplest definition of an estuary is the place where salt and fresh water mix, typically at the mouth of a river. These transition zones between riverine and marine environments are among the most productive natural habitats in the world. Many ocean-going fish species spend their infancy in estuaries, enjoying protection from large predators and the abundance of nutrients that results from the inflow of both freshwater and seawater.
They are popular with humans as well. Currently about 60 percent of the world’s population lives along estuaries and the coast. Consequently, these areas are also subject to degradation from sedimentation; myriad pollutants from agricultural, domestic, and industrial runoff; and eutrophication from nutrient overload.
What is a threatened species?
Discuss the meaning of the terms threatened and endangered species, using the Western Snowy Plover as a case study.
What is a marine sanctuary?
Beach Walk:
Pass out binoculars. As you walk along the beach, keep an eye out for snowy plovers.
Water Testing:
Collect water near the mouth of the river and record results of basic water quality tests for dissolved oxygen, nitrates, phosphates, and temperature.
Consider comparing these to earlier results.
Trash Time Line:
Either on beach or at parking lot, set up Trash Time Line game
Journal Prompt:
How can I protect my watershed?
