{ "nid": "46", "details": "\x3cspan class=\"title\"\x3eEcoBeaker™: Aquatic Trophic Cascades\x3c/span\x3e\x3cbr/\x3e\n\x3cspan class=\"description\"\x3eIn this lab, students try the classic test of adding fish to a fish-free lake, observing the effect on the abundances of different sized zooplankton and phytoplankton. They then conduct experiments to try and figure out why these changes occur. The model includes green algae, blue-green algae, Bosmina, Daphnia, minnows, and trout.\r\n\x3c/span\x3e\x3cbr/\x3e\n\x3cbr/\x3e\n\x3cstrong\x3eLevel\x3c/strong\x3e: Advanced\x3cbr/\x3e\n\x3cstrong\x3eKey Concepts\x3c/strong\x3e: Food chains; Trophic cascades; Trophic levels\x3cbr/\x3e\n\x3cstrong\x3eCourses\x3c/strong\x3e: Aquatic Ecology; Community Ecology; Conservation Biology; Ecology\x3cbr/\x3e\n          \x3cbr/\x3e\x3ca href=\"/search_result_details/brief/46\" class=\"node_brief\"\x3eRead less\x3c/a\x3e        \x3cbr/\x3e\x3ca href=\"/cart/add/46\"\x3e + Add to course collection\x3c/a\x3e  \x3c/span\x3e \x3c!-- description --\x3e\n" }