5/29/24 - Lecture 29: Ecosystems

Question 1

Regulating services

Answer 1

The benefit provided by ecosystem processes that regulate natural phenomena (water purification, decomposition, pollination, carbon storage, climate regulation, erosion control)

Question 2

Cultural services

Answer 2

A non-material benefit that contributes to the development and cultural advancement of people (ecosystem roles in local culture, recreation, creativity inspired by interactions with nature)

Question 3

Watershed

Answer 3

An area of land that drains water, sediment, and dissolved materials to a common receiving body or outlet

Question 4

Watershed ecosystem

Answer 4

Interacting biotic and abiotic components within a watershed’s boundaries

Question 5

Mangrove forests

Answer 5

Ecosystem generally found along sheltered coasts, grow in saline soil and brackish water, subject to periodic fresh- and salt-water inundation

Question 6

Biomagnification

Answer 6

The increase in concentration of a substance (like nitrogen, mercury, PCBs) in tissues of organisms at successively higher trophic levels

Question 7

Polychlorinated biphenyls (PCBs)

Answer 7

Highly carcinogenic chemical compounds, formerly used in industrial and consumer products

Question 8

CO2 fertilization effect

Answer 8

Greater CO2 increases water use efficiency and stimulates more photosynthesis