Most Pervasive and Severe Disturbances for the Central Mississippi River States

Summary

A. Pervasive disturbances: The most common disturbances based on total stream length in a given region. Top five overall most pervasive disturbances to all stream reaches, regardless of stream size and across all spatial scales (ranked highest first): Impervious surface cover Pasture and hay land use Population density Road density Low intensity urban land use Top three most pervasive disturbances to creeks (<100 km 2 watersheds) across all spatial scales : Impervious surface cover Population density Road density Top three most pervasive disturbances to rivers (>100 km 2 watersheds) across all spatial scales : Pasture and hay land use Upstream dam density Mine density. Top five most pervasive disturbances to creeks, specific [...]

Summary

A. Pervasive disturbances: The most common disturbances based on total stream length in a given region.

Top five overall most pervasive disturbances to all stream reaches, regardless of stream size and across all spatial scales (ranked highest first):

Impervious surface cover
Pasture and hay land use
Population density
Road density
Low intensity urban land use

Top three most pervasive disturbances to creeks (<100 km ² watersheds) across all spatial scales :

Impervious surface cover
Population density
Road density

Top three most pervasive disturbances to rivers (>100 km ² watersheds) across all spatial scales :

Pasture and hay land use
Upstream dam density
Mine density.

Top five most pervasive disturbances to creeks, specific to spatial scale:

Road length density in network catchments
Road crossing density in network catchments
Impervious surface cover in network catchments
Low intensity urban in local catchments
Downstream dam density in network catchments.

Top five most pervasive disturbances to rivers, specific to spatial scale:

Pasture and hay land use in network buffers
Pasture and hay land use in network catchments
Upstream dam density in network catchments
Mine density in network catchments
Crop land use in network buffers.

Pasture and hay land use makes up the majority of the landscape disturbance leading to the higher risk of current habitat degradation in rivers and streams in this state grouping.
In the Central Mississippi River state group, 48.8% of streams are classified as low or very low risk of habitat degradation.

B. Most severe disturbances (a subset of pervasive disturbances): Disturbances associated with stream reaches in a given region that were scored as having high or very high risk of habitat degradation (red and orange color groups).
Top five overall most severe disturbances to all stream reaches, regardless of stream size and across all spatial scales (ranked highest first):

Crop land use
Pasture and hay land use
Low intensity urban land use
Total excessive sediment yield
Agricultural water withdrawals

Top three most severe disturbances to creeks (<100 km ² watersheds) across all spatial scales:

Pasture and hay land use
Crop land use
Low intensity urban land use.

Top three most severe disturbances to rivers (>100 km ² watersheds) across all spatial scales:

Crop land use
Pasture and hay land use
Upstream dam density.

Contacts

Author :: Steve Crawford, Gary Whelan, Dana M. Infante, Wesley M. Daniel
Curator :: Daniel J Wieferich, Ricardo McClees-Funinan

Related External Resources

Type: Browse Image

Supporting Figure	https://www.sciencebase.gov/catalog/item/578a9a4de4b0c1aacab8977e

Purpose

The U.S Geological Survey (USGS) is partnering with the National Fish Habitat Partnership (NFHP) to produce the 2015 report entitled, "Through a Fish's Eye: The Status of Fish Habitats in the United States 2015". The information contained within this item is a product of NFHP. The Bureau is neither responsible nor liable for the accuracy or the use of the scientific content within this item. This content is considered preliminary pending subsequent review and approval.

Most Pervasive and Severe Disturbances for the Central Mississippi River States

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