دورية أكاديمية
Dredging impact on an urbanized Florida bayou: effects on benthos and algal-periphyton.
| العنوان: | Dredging impact on an urbanized Florida bayou: effects on benthos and algal-periphyton. |
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| المؤلفون: | Lewis MA; US Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Gulf Ecology Division, 1 Sabine Island Drive, Gulf Breeze, FL 32561-5299, USA. lewis.michael@epa.gov, Weber DE, Stanley RS, Moore JC |
| المصدر: | Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2001; Vol. 115 (2), pp. 161-71. |
| نوع المنشور: | Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
| اللغة: | English |
| بيانات الدورية: | Publisher: Elsevier Applied Science Publishers Country of Publication: England NLM ID: 8804476 Publication Model: Print Cited Medium: Print ISSN: 0269-7491 (Print) Linking ISSN: 02697491 NLM ISO Abbreviation: Environ Pollut Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Barking, Essex, England : Elsevier Applied Science Publishers, c1987- |
| مواضيع طبية MeSH: | Crustacea/*drug effects , Eukaryota/*drug effects , Geologic Sediments/*chemistry , Metals, Heavy/*analysis , Seawater/*chemistry , Soil Pollutants/*toxicity, Animals ; Crustacea/growth & development ; Environment ; Environmental Monitoring ; Eukaryota/growth & development ; Geologic Sediments/analysis ; Soil Pollutants/analysis ; United States ; United States Environmental Protection Agency ; Urbanization ; Water Movements |
| مستخلص: | Environmental effects of dredging events have been uncommonly reported for shallow, residential estuaries characteristic of the Gulf of Mexico region. The objective of this study was to determine the impact of hydraulic dredging on an urbanized estuary. Physicochemical quality, benthic community composition, whole sediment toxicity, periphytic algal community composition and trace metal tissue quality were determined prior to and after dredging. The effects on surface water pH, dissolved oxygen, and temperature were negligible but photosynthetically active radiation was decreased at several stations. Dredging significantly reduced benthic diversity and density (P < 0.05). However, the sediments were not acutely toxic to the epibenthic, Americamysis bahia (formerly Mysidopsis bahia); survival averaged 93% (post-dredging) and to 98% (pre-dredging). There were several post-dredging taxonomic structural changes in the diatom-dominated, periphyton community but differences in mean density and three diversity indices were not significant. Trace metal concentration in periphyton after dredging were reduced from an average of 4-65% and significantly for mercury, zinc and chromium in several areas. It was concluded that the environmental impact of small-scale dredging events in urbanized near-coastal areas, based on the selected parameters, are likely to be localized and of short-term environmental consequence. The choice of the target biota, response parameters and chemical analysis are important considerations in the environmental impact assessment of these periodic episodic events. |
| المشرفين على المادة: | 0 (Metals, Heavy) 0 (Soil Pollutants) |
| تواريخ الأحداث: | Date Created: 20011115 Date Completed: 20020403 Latest Revision: 20190901 |
| رمز التحديث: | 20231215 |
| DOI: | 10.1016/s0269-7491(01)00118-x |
| PMID: | 11706789 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 0269-7491 |
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| DOI: | 10.1016/s0269-7491(01)00118-x |