Author: Richard H. Greenwood
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
Book Description
Most recent proposals for the upper Great Lakes would extend the commercial shipping season to January 31 + or - 2 weeks. Adverse environmental effects resulting from navigation season extension, particularly to the narrow connecting waters of the Great Lakes such as the St. Marys River System, are a major concern. Ecological information necessary to evaluate the impacts of navigation season extension have been lacking for the St. Marys River, particularly for the portion above the Soo Locks. Baseline environmental studies were begun in the late 1970's, concentrating mainly on the lower portions of the river. The purpose of this field reconnaissance was to provide qualitative data in an attempt to help characterize the biological communities in this part of the river. Benthic macroinvertebrates of 35 taxa (gross taxonomic categories) were identified from 87 analyzed Ponar grab samples. The taxonomic assemblages and numbers of macrobenthic organisms found to be present in the upper St. Marys River are indicative of a very high quality and productive environment. The rich and diverse benthic community present is capable of supporting many important fish and wildlife resources, particularly fish and migratory waterfowl. Results of this effort support previously expressed concerns regarding environmental impacts to the St. Marys River potentially resulting from the navigation season extension, as well as additional dredging/disposal and operation of longer and/or deeper draft vessels alternatives being considered. (edc).
Survey of Macrobenthos of the Upper St. Marys River. Field Reconnaissance Report Great Lakes - St. Lawrence Seaway. Navigation Season Extension Program
Author: Richard H. Greenwood
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
Book Description
Most recent proposals for the upper Great Lakes would extend the commercial shipping season to January 31 + or - 2 weeks. Adverse environmental effects resulting from navigation season extension, particularly to the narrow connecting waters of the Great Lakes such as the St. Marys River System, are a major concern. Ecological information necessary to evaluate the impacts of navigation season extension have been lacking for the St. Marys River, particularly for the portion above the Soo Locks. Baseline environmental studies were begun in the late 1970's, concentrating mainly on the lower portions of the river. The purpose of this field reconnaissance was to provide qualitative data in an attempt to help characterize the biological communities in this part of the river. Benthic macroinvertebrates of 35 taxa (gross taxonomic categories) were identified from 87 analyzed Ponar grab samples. The taxonomic assemblages and numbers of macrobenthic organisms found to be present in the upper St. Marys River are indicative of a very high quality and productive environment. The rich and diverse benthic community present is capable of supporting many important fish and wildlife resources, particularly fish and migratory waterfowl. Results of this effort support previously expressed concerns regarding environmental impacts to the St. Marys River potentially resulting from the navigation season extension, as well as additional dredging/disposal and operation of longer and/or deeper draft vessels alternatives being considered. (edc).
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
Book Description
Most recent proposals for the upper Great Lakes would extend the commercial shipping season to January 31 + or - 2 weeks. Adverse environmental effects resulting from navigation season extension, particularly to the narrow connecting waters of the Great Lakes such as the St. Marys River System, are a major concern. Ecological information necessary to evaluate the impacts of navigation season extension have been lacking for the St. Marys River, particularly for the portion above the Soo Locks. Baseline environmental studies were begun in the late 1970's, concentrating mainly on the lower portions of the river. The purpose of this field reconnaissance was to provide qualitative data in an attempt to help characterize the biological communities in this part of the river. Benthic macroinvertebrates of 35 taxa (gross taxonomic categories) were identified from 87 analyzed Ponar grab samples. The taxonomic assemblages and numbers of macrobenthic organisms found to be present in the upper St. Marys River are indicative of a very high quality and productive environment. The rich and diverse benthic community present is capable of supporting many important fish and wildlife resources, particularly fish and migratory waterfowl. Results of this effort support previously expressed concerns regarding environmental impacts to the St. Marys River potentially resulting from the navigation season extension, as well as additional dredging/disposal and operation of longer and/or deeper draft vessels alternatives being considered. (edc).
Final Environmental Impact Statement
Author: United States. Army. Corps of Engineers. Detroit District
Publisher:
ISBN:
Category : Harbors
Languages : en
Pages : 836
Book Description
Publisher:
ISBN:
Category : Harbors
Languages : en
Pages : 836
Book Description
The St. Marys River, Michigan
Author: Walter G. Duffy
Publisher:
ISBN:
Category : Estuarine ecology
Languages : en
Pages : 160
Book Description
Publisher:
ISBN:
Category : Estuarine ecology
Languages : en
Pages : 160
Book Description
Great Lakes-St.Lawrence Seaway Navigation Season Extension Interim Feasibility Study
Author:
Publisher:
ISBN:
Category : Environmental impact statements
Languages : en
Pages : 312
Book Description
Publisher:
ISBN:
Category : Environmental impact statements
Languages : en
Pages : 312
Book Description
Biological Report
Technical Reports Awareness Circular : TRAC.
Great Lakes Connecting Channels and Harbors
Author:
Publisher:
ISBN:
Category : Channels (Hydraulic engineering)
Languages : en
Pages : 596
Book Description
Publisher:
ISBN:
Category : Channels (Hydraulic engineering)
Languages : en
Pages : 596
Book Description
Final Survey Study for Great Lakes and St. Lawrence Seaway Navigation Season Extension
Survey Study for Great Lakes and St. Lawrence Seaway Navigation Season Extension
Author: United States. Army. Corps of Engineers. Detroit District
Publisher:
ISBN:
Category : Great Lakes (North America)
Languages : en
Pages : 332
Book Description
Publisher:
ISBN:
Category : Great Lakes (North America)
Languages : en
Pages : 332
Book Description