Table 31a Positive ecosystem service rankings relative within fresh waters not quantitative for managed floodcontrol reservoirs and unmanaged lakes

Explanation of service values:

(—3) = strong disservice; (0) = neutral; (3) = strong positive; n.a. = not applicable.

Lakes: Lakes:

Unmanaged Managed

Service Service

Goods and Services Rank Biotic Abiotic Rank Biotic Abiotic

Provisional Services

Food production Plant

0

n.a.

n.a.

0

n.a.

n.a.

Animal

2-3

***

flow-dependent

0-1

***

naturally flow-dependent

Other products

Fuel/Energy

Fiber

1 0

n.a. n.a.

*** n.a.

1 0

n.a. n.a.

*** n.a.

Potable water

3

***

dilution,

0

n.a.

n.a.

Water quantity

***

3

n.a.

***

Supporting Services Waste processing

2

***

*** dilution

1

n.a.

n.a.

Climate modification

0

n.a.

temperature n.a.

0

n.a.

n.a.

C sequestration Trace gas production

Irrigation Transport

*

*** ***

Cultural Services Recreation

Aesthetic

fish/boat/fowl

Asterisks indicate the relative importance of biotic and abiotic factors, from weak (*) to strong (***), in the provision of the associated good or service.

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