Geology topics

Glen Gebhart

Publications and source records attributed to Glen Gebhart.

8 recordsLinked to original sources

USGS1984

Habitat Suitability Index Models and Instream Flow Suitability Curves: Warmouth

The wa rmouth (Lepomi s gul osus) occurs naturally throughout the central and southeastern United States. It is distributed throughout Kansas, Iowa, and Missouri, north to southern Wisconsin, lower Michigan, Lake Erie, and western Pennsylvania, and south to Florida and west through the Gulf States to the Rio Grande (Hubbs and Lagler 1947; Larimore 1957). It has been introduced into California (Hubble 1966; Moyle 1976), Arizona (Minckley 1973), and other western states (Smith 1896).

FWS/OBS↗

USGS1984

Habitat Suitability Index Models and Instream Flow Suitability Curves: Spotted bass

The Habitat Suitability Index (HSI) models presented in this publication aid in identifying habitat variable important to the growth and survival of spotted bass (Micropterus punctulatus). Facts, ideas, and concepts obtained from the research literature and expert reviews are synthesized and presented in a format that can be used for impact assessment. The models are hypotheses of species-habitat relationships, and model users should recognize that the degree of veracity of the HSI model, SI graphs, and assumptions will vary according to geographical area and the extent of the data base for individual variables. A brief discussion of selected Suitability Index (SI) curves as used in the Instream Flow Incremental Methodology (IFIM), and a discussion of SI curves available for the IFIM analysis of Spotted bass habitat are also included.

FWS/OBS↗

USGS1984

Habitat Suitability Index Models and Instream Flow Suitability Curves: Redear sunfish

The redear sunfish (Lepomis microlophus), commonly referred to as the shellcracker, is native from the Mississippi River in Missouri and southern Indiana to North Carolina, south through Florida, and west to eastern Texas (Cole 1951; Trautman 1957; Hubbs and Lagler 1964; Wilbur 1969; Pflieger 1975). The species has been successfully introduced into Arizona, California, and southern Michigan and stocked into new waters in Oklahoma,Missouri, Ohio, Indiana, and Illinois (Cole 1951; Beland 1953; Jenkins 1955; Trautman 1957; Lopinot 1961; Hubbs and Lagler 1964; Wilbur 1969).

FWS/OBS↗

USGS1983

Habitat Suitability Index Models: Smallmouth bass

A review and synthesis of existing information were used to develop riverine and lacustrine habitat models for Smallmouth bass (Micropterus dolomieui), a freshwater species. The models are scaled to produce an index of habitat suitability between 0 (unsuitable habitat) and 1 (optimally suitable habitat) for freshwater areas of the continental United States. Habitat suitability indexes (HSI's) are designed for use with the habitat evaluation procedures developed by the U.S. Fish and Wildlife Service. The instream flow suitability curves are intended for use with the Instream Flow Incremental Methodology. Also included are discussions of Suitability Index (SI) curves as used by the Instream Flow Incremental Methodology (IFIM) and SI curves available for an IFIM analysis of Smallmouth bass habitat.

FWS/OBS↗

USGS1982

Habitat Suitability Index Models: Green sunfish

This is one of a series of publications that provide information on the habitat requirements of selected fish and wildlife species. Literature describing the relationship between habitat variables related to life requisites and habitat suitability for the Green sunfish (Lepomis cyanellus) are synthesized. These data are subsequently used to develop Habitat Suitability (HIS) models. The HSI models are designed to provide information that can be used in impact assessment and habitat management.

FWS/OBS↗

USGS1982

Habitat Suitability Index Models: Largemouth bass

This is one of a series of publications that provide information on the habitat requirements of selected fish and wildlife species. Literature describing the relationship between habitat variables related to life requisites and habitat suitability for the Largemouth bass (Micropterus salmoides) are synthesized. These data are subsequently used to develop Habitat Suitability (HIS) models. The HSI models are designed to provide information that can be used in impact assessment and habitat management.

FWS/OBS↗

USGS1982

Habitat Suitability Index models: White crappie

The white crappie (Pomoxis annularis) is native to freshwater lakes and streams from the southern Great Lakes, west to Nebraska, south to Texas and Alabama, east to North Carolina, then west of the Appalachian Mountains to New York. It has been widely introduced outside this range throughout North America (Hubbs and Lagler 1958; Goodson 1966; Scott and Crossman 1973).

FWS/OBS↗

USGS1982

Habitat Suitability Index Models: Bluegill

A literature review encompassing habitat and species characteristics of the bluegill (Lepomis macrochirus) is followed by a discussion of the relationship of habitat variables and life requisites of this species. These data re then incorporated into Habitat Suitability Index models for the bluegill. This is one in a series of publications describing habitat requirements of selected fish and wildlife species. Numerous literature sources have been consulted in an effort to consolidate scientific data on species habitat relationships. These data have subsequently been synthesized into Habitat Suitability Index (HSI) models. the models are based on suitability indices formulated for variables found to affect the life cycle and survival of the species. The models are designed to be modified to evaluate specific habitat alterations using the HSI model building techniques presented in the U.S. Fish and Wildlife Service's Habitat Evaluation Procedures.

FWS/OBS↗