Value

Defined by Webster to be the quality of a thing according to which it is thought of as being more or less desirable, useful, estimable or important.

Using this definition the value of an ecosystem might be defined in terms of its beauty, its uniqueness, its irreplacability, its contribution to life support functions or commercial or recreational opportunities, or its role in supporting wildlife or reducing environmental or human health risks, or providing many other services that benefit humans.

Source: Ecosystem Valuation Definition of Terms 

Economic value

The economic concept of value is that value is human driven (i.e., it is anthropocentric), meaning that goods and services are not considered to have value unless humans place value on them [willingness to pay].

From a strict economic perspective, there is no such thing as intrinsic or natural value. Of course, this focus on human-based value leads economists to measure market and nonmarket values using monetary instruments such as dollars.

Source: Agricultural Economics & Agribusiness department of the Louisiana State University How is economic value measured 

Intrinsic value - Non-market value

GreenFacts Summary on Ecosystem Change:

• 3.2 How is the economy linked to ecosystem services?

Español: Valor
Français: Valeur

Arctic Climate Change

Forests

Ecosystem Change

Climate Change

Biodiversity (MA)