Author: David B. Mathis
Publisher:
ISBN:
Category : Dikes (Training structures)
Languages : en
Pages : 61
Book Description
The aquatic macroinvertebrate assemblage of a dike in the Lower Mississippi River was evaluated by implanting substrate basket samplers into the structure. The resulting data indicated that a diverse (38 taxa) and productive (average density = 101,968.4 organisms/sq. m assemblage was present, and was characterized by net-spinning caddisflies, tube-building chironomids, clinging mayflies, and isopods. A comparison of the surface stones of the basket samplers with adjacent surface stones of the dike indicated that the implanted substrates provided representative estimates of both the composition and structure of the macroinvertebrate assemblage. These data also indicated significant macroinvertebrate activity below the surface substrate of the dike. Differences in habitat conditions among dike positions (downstream, top, upstream) were the major contributors to overall sample variability. Thus, stratified random sampling based on dike position is recommended for future comparative studies. (Author).
ASSESSMENT OF IMPLANTED SUBSTRATE SAMPLERS FOR MACROINVERTEBRATES INHABITING STONE DIKES OF THE LOWER MISSISSIPPI RIVER.
Author: David B. Mathis
Publisher:
ISBN:
Category : Dikes (Training structures)
Languages : en
Pages : 61
Book Description
The aquatic macroinvertebrate assemblage of a dike in the Lower Mississippi River was evaluated by implanting substrate basket samplers into the structure. The resulting data indicated that a diverse (38 taxa) and productive (average density = 101,968.4 organisms/sq. m assemblage was present, and was characterized by net-spinning caddisflies, tube-building chironomids, clinging mayflies, and isopods. A comparison of the surface stones of the basket samplers with adjacent surface stones of the dike indicated that the implanted substrates provided representative estimates of both the composition and structure of the macroinvertebrate assemblage. These data also indicated significant macroinvertebrate activity below the surface substrate of the dike. Differences in habitat conditions among dike positions (downstream, top, upstream) were the major contributors to overall sample variability. Thus, stratified random sampling based on dike position is recommended for future comparative studies. (Author).
Publisher:
ISBN:
Category : Dikes (Training structures)
Languages : en
Pages : 61
Book Description
The aquatic macroinvertebrate assemblage of a dike in the Lower Mississippi River was evaluated by implanting substrate basket samplers into the structure. The resulting data indicated that a diverse (38 taxa) and productive (average density = 101,968.4 organisms/sq. m assemblage was present, and was characterized by net-spinning caddisflies, tube-building chironomids, clinging mayflies, and isopods. A comparison of the surface stones of the basket samplers with adjacent surface stones of the dike indicated that the implanted substrates provided representative estimates of both the composition and structure of the macroinvertebrate assemblage. These data also indicated significant macroinvertebrate activity below the surface substrate of the dike. Differences in habitat conditions among dike positions (downstream, top, upstream) were the major contributors to overall sample variability. Thus, stratified random sampling based on dike position is recommended for future comparative studies. (Author).
Selected Water Resources Abstracts
Assemblage Characteristics and Sampling Considerations for Aquatic Macroinvertebrates Inhabiting a Lower Mississippi River Stone Dike
Author: David B. Mathis
Publisher:
ISBN:
Category : Freshwater invertebrates
Languages : en
Pages : 158
Book Description
Publisher:
ISBN:
Category : Freshwater invertebrates
Languages : en
Pages : 158
Book Description
Status and Trends of the Nation's Biological Resources
Preview of Status and Trends of the Nation's Biological Resources
Author:
Publisher:
ISBN:
Category : Biodiversity
Languages : en
Pages : 48
Book Description
Lists the contents of the full two-volume report, and gives the text of the chapter on the Mississippi River from vol. 1.
Publisher:
ISBN:
Category : Biodiversity
Languages : en
Pages : 48
Book Description
Lists the contents of the full two-volume report, and gives the text of the chapter on the Mississippi River from vol. 1.
Technical Abstract Bulletin
Environmental & Water Quality Operational Studies
Author:
Publisher:
ISBN:
Category : Environmental engineering
Languages : en
Pages : 8
Book Description
Publisher:
ISBN:
Category : Environmental engineering
Languages : en
Pages : 8
Book Description