Generally, large birds and seabirds live longer than small birds. Albatrosses live so long that it is hard to calculate their survival rates - they can live longer than the metal rings that identify them, and probably longer than most humans.
Food chain. Definition. A feeding hierarchy in which organisms in an ecosystem are grouped into trophic (nutritional) levels and are shown in a succession to represent the flow of food energy and the feeding relationships between them. Supplement.
A food web is just another layer of the entire process. A food chain is a simplified version of what really happens in nature. Very few animals just eat one food. A food web is nature's way of making sure that there is food to go around.Let's use the simple food chain we used earlier. food web is just another layer of the entire process. A food chain is a simplified version of what really happens in nature. Very few animals just eat one food. A food web is nature's way of making sure that there is food to go around. Let's use the simple food chain we used earlier.