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Patterns of Development and Abnormalities among Tadpoles in a Constructed Wetland Receiving Treated Wastewater

Constructed wetlands are promoted for effectiveness at treating   wastewater and potential value as wildlife habitat; however,   wildlife performance studies in treated wastewater wetlands are   limited. We used repeated surveys of larval amphibians along three   wetland systems and four reference sites to test the hypothesis that   bullfrog tadpoles exposed to direct inputs of treated wastewater   develop slower, show a higher frequency of abnormalities, and are   smaller at metamorphosis compared to tadpoles from reference ponds.   Bullfrog tadpoles from wastewater wetlands were similar in size at   metamorphosis compared to tadpoles from reference sites; however,   they did show a much higher frequency of abnormalities including   severe edema, scoliosis, and extreme calcinosis of soft tissues.   Calcinosis was novel to the literature on amphibian abnormalities,   the most frequent abnormality, and restricted exclusively to   treatment wetlands. Within the constructed wetlands, tadpole   development was slower and the frequency of scoliosis and calcinosis   was higher in those cells receiving direct inputs of treated   wastewater. Our results suggest that portions of constructed   wetlands that directly receive treated wastewater may be poor   amphibian habitat.

Status
In progress
Type
Project
Start Date
End Date
Researchers
John MaerzPrincipal Investigator
Associated with 1 projects
Agencies

Funding 1 projects for a total of $-3.00
Scope of Study
Field Investigation
Scale of Phenomena
Ecosystem
Processes
Natural Ecological Processes
Treatment / Manufacturing Processes
Land Use and Habitat
Wetlands
Lake Basin Connecting Channels
Lake Erie
State Province
Ontario
Region Being Monitored
Coastal Wetlands
Resource Being Monitored
Wildlife
Beneficial Use Impairment Assessments
Bird or Animal Deformities or Reproduction Problems
Annex Numbers
Remedial Action Plans and Lakewide Management Plans
Research & Development
Annex 17
Impact of water quality and AIS on fish and wildlife populations and habitats
General
Monitoring
Annex
  • Annex Numbers
    Annex Numbers
    Remedial Action Plans and Lakewide Management Plans
    Research & Development
  • Annex 17
    Annex 17
    Impact of water quality and AIS on fish and wildlife populations and habitats

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