Subaqueous Freshwater Riverine Habitats

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List model

Ecosystem states

State 1

Floral Based Communities

State 2

Human Altered/ Human Transported State

State 3

Altered Hydrology: Permanent Flooding

16586

Circle-spoke model

Ecosystem states

State 1

State 2

State 3

16586

Scenario model

Ecosystem states

Current ecosystem state

Select a state

State 1
Floral Based Communities
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State 2
Human Altered/ Human Transported State
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State 3
Altered Hydrology: Permanent Flooding
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Management practices/drivers

Select a transition or restoration pathway

Transition T1A
Dredging
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Transition T1B
Damming
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Restoration pathway R2A
Fill/ Vegetation Replanting
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Transition T2A
Damming
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Restoration pathway R3A
Dam Removal
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No transition or restoration pathway between the selected states has been described

Target ecosystem state

Select a state

State 1
Floral Based Communities
More details
State 2
Human Altered/ Human Transported State
More details
State 3
Altered Hydrology: Permanent Flooding
More details

16586

State 1
Floral Based Communities

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Description

These communities describe large populations of vascular and non-vascular submerged and emergent aquatic plants, found within the river channel. These communities provide habitat for smaller organisms as well as important food sources for marine organisms such as benthic organisms and fish. They are commonly found on unconsolidated substrates but can be found on consolidated substrates and act as stabilizers and reduces the wave-energy on the bottom and promotes settling of suspended particles. When found on unconsolidated substrates these communities are typically seen as extensive stands with one or more species present and open bare bottom areas. The natural vegetation of this community includes seagrass and algal beds and floating water emergent species.

Submodel

1.1. Submerged/Emergent Natives

1.2. Invasive Non-Native

1.3. Unvegetated Unconsolidated Materials

State 2
Human Altered/ Human Transported State

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Description

This state describes the impact from anthropogenic sources which can change the vegetative structure of a community while maintaining the natural river boundaries.

Submodel

2.1. Dredged Channel

2.2. Spoil Islands

State 3
Altered Hydrology: Permanent Flooding

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Description

This state describes alterations of the riverine system to create an artificial lake or pond by damming the natural flow of water.

Submodel

3.1. Lacustrine Habitat

Transition T1A

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Mechanism

This is an anthropogenic process of dredging. This is the removal of material from the bottom of the submerged system for the creation of channels for large boats and other marine vessels to pass through.

Transition T1B

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Mechanism

This is the natural or anthropogenic process of damming a natural flowing river. Natural damming processes including activities from beavers. Anthropogenic damming processes create artificial dams to block the natural flow of water. This floods the area behind the dam leaving behind a larger stagnant permanent body of water.

Restoration pathway R2A

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Mechanism

This restoration includes the removal of altered habitat and filled and replanted with the native species to that habitat.

Transition T2A

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Mechanism

Restoration pathway R3A

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Mechanism

This restoration includes the removal of the natural or anthropogenic dam to restore the natural flow of the riverine habitat before damming occurred.

Model keys

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Subaqueous Freshwater Riverine Habitats

List model

Circle-spoke model

Scenario model

Current ecosystem state

Management practices/drivers

Target ecosystem state

State 1
Floral Based Communities

Description

Submodel

State 2
Human Altered/ Human Transported State

Description

Submodel

State 3
Altered Hydrology: Permanent Flooding

Description

Submodel

Transition T1A

Mechanism

Transition T1B

Mechanism

Restoration pathway R2A

Mechanism

Transition T2A

Mechanism

Restoration pathway R3A

Mechanism

Model keys

Briefcase

Ecological sites

Major Land Resource Areas