Textbook: Chapter 22 - Decomposition and Biogeochemical Cycles Flashcards

1
Q

Immobilization

A

Conversion of an element from inorganic to organic form in microbial or plant tissue, rendering the nutrient unavailable to other organisms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Internal cycling

A

Movement or cycling of nutrients through components of ecosystems

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Leaf pack

A

Areas of accumulated leaf litter in stream ecosystems; term also refers to litterbags used in steam decompostition experiments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Mineralization

A

Microbial breakdown of humus and other organic matter in soil to inorganic substances

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Nutrient spiraling

A

In flowing-water ecosystems, the combined processes of nutrient cycling and downstream transport

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Net mineralizationr ate

A

Difference between the rates of mineralization and immobilization

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Nutrient cycling

A

Pathway of an element or nutrient through the ecosystem, from assimilation by organisms to release by decomposition

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Pycnocline

A

Area in the water column where the highest rate of change in density occurs for a given change in depth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Retranslocation

A

Recycling of nutrients within a plant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Rhizosphere

A

Describes a region of the soil where plant roots function. it is an active zone of root growth and death, characterized by intense microbial and fungal activity.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Soil microbial loop

A

Process of supplementing carbon to microbial decomposers in the rhizosphere, enhancing the decompoisiton of soil organic matter and subsequently releasing mineral nutrients for plant uptake by microbial grazers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Tidal subsidy

A

Nutrients carried to coastal ecosystems and wastes carried away by tidal cycles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly