The world's biodiversity is in serious decline. We do not know the total number of species that were on this planet, say, at the beginning of the second millennium, but by the beginning of the third, we have identified 1.4 million species and we think there are at least 20 million, based upon individual studies of trees in rain forest for example and estimates of ecosystem diversity. How can we measure the usefulness of species to us and how many of them do we need to maintain the biosphere sustainably?

最新修改

• 10/19/2024

贡献者

• Harper, David

Contributor type

• creator

Subject

• Complex systems
• Ecology
• Biology
• UKOER
• SFSOER
• Problem-based learning

Publisher

• The University of Hull

Identifier

• hull:2336

Related item publisher

• The University of Hull

Resource type general

• Learning materials