Ecology: Food Chains

Title
Ecology: Food Chains [videorecording] Coronet Films
Format
Videocassette
Film
Published/Produced
Coronet Films 1992
Description
1 videocassette (14 min.) sound,color; 1/2 in.
System details
VHS
Summary
Surveys examples of food chains in marine biology. Undersea kelp forests are the primary producers in many food chains. They collect light energy, transfer some into chemical energy and store it in their tissues. Grazers like sea urchins are primary consumers; they eat the kelp, gain its energy and store some in their own tissues. Wrasse are secondary consumers who eat the sea urchins, passing energy up the food chain. Algae growing on kelp blades are also primary producers, as are the phytoplankton that swarm near the surface of deep waters. Moving up any food chain, there are fewer and fewer animals at each link, because the animals in each link use up so much energy. Many food chains overlap to form a food web, which may contain keystone species. Altering the numbers of one species can cause great changes in other parts of the web.
Subject headings
Food chains (Ecology)
Marine biology

Holdings

Library
Blmgtn - Auxiliary Library Facility
Call Number
NC2133
Location
Auxiliary Library Facility - Stacks