Assessment of Organochlorine Pesticide Exposures in Riparian Ecosystems and Environmental Education in Southeastern Mexico
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Miami University / OhioLINK
2014
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=miami1401975159 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-miami14019751592021-08-03T06:25:18Z Assessment of Organochlorine Pesticide Exposures in Riparian Ecosystems and Environmental Education in Southeastern Mexico Herrera-Herrera, Jose Rafael Agricultural Chemicals Animal Sciences Conservation Ecology Environmental Education Environmental Science Wildlife Conservation Zoology Attitude Bioaccumulation Bird conservation Cricket DDE Elementary student Environmental education Estuary Knowledge Laguna de Terminos Mangrove forest Mexico Organochlorine Preserve Riparian ecosystem Sediment Spider Warblers Workshop Assessments of organochlorine pesticide (OCP) residues in tropical riparian ecosystems improve our understanding of how pollutants move through riparian food webs. We assessed OCP residues in two species of mangrove-specialist warblers of the Laguna de Terminos (LT) preserve in southeastern Mexico: the resident mangrove warbler and the migratory northern waterthrush. We concurrently evaluated OCP levels in spiders, mosquitoes, oysters, and sediments during both summer and winter periods. Resident birds showed significantly higher concentrations of OCPs than migrants, and both species had individuals accumulating different parental OCPs above risk thresholds for other wildlife. Mean values of ΣOCPs in sediments were elevated 3 to 6 orders of magnitude above previously published concentrations for the LT region. Mosquitoes had the highest concentrations of OCPs and the second highest number of ΣOCPs. Oysters showed mean concentration of ΣOCPs four orders of magnitude higher than previous records for the LT region and do not comply with the federal regulations of Mexico for human consumption. Results indicate that localized polluted sites along the migration route of passerines in the tropics deserve ecotoxicological monitoring strategies.We assessed the uptake and accumulation of p,p'-DDE (DDE) in spiders and crickets using DDE-contaminated food in the laboratory. Spiders and crickets accumulated significant levels of DDE after six weeks of exposure. Growth rate and dose rate were important parameters in determining DDE at steady state in crickets. Neither spiders nor crickets biomagnified DDE above levels in their food. Mechanistic studies on OCP trophic transfer contribute to our understanding of the movement of and putative fate for bioaccumulative pollutants in the ecosystems.We assessed the effects of a one-day environmental education (EE) workshop on rural fourth graders' ecological knowledge and environmental attitude in southeastern Mexico. The results revealed that students increased their knowledge and pro-environmental attitude following the workshop and retained their knowledge for up to eight weeks. The results support the notions that the utilization of non-traditional interactive techniques in one-day EE workshops is effective and the implementation of this kind of EE workshops in school curricula of Mexican rural elementary students is feasible. 2014-06-06 English text Miami University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=miami1401975159 http://rave.ohiolink.edu/etdc/view?acc_num=miami1401975159 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Agricultural Chemicals Animal Sciences Conservation Ecology Environmental Education Environmental Science Wildlife Conservation Zoology Attitude Bioaccumulation Bird conservation Cricket DDE Elementary student Environmental education Estuary Knowledge Laguna de Terminos Mangrove forest Mexico Organochlorine Preserve Riparian ecosystem Sediment Spider Warblers Workshop |
| spellingShingle |
Agricultural Chemicals Animal Sciences Conservation Ecology Environmental Education Environmental Science Wildlife Conservation Zoology Attitude Bioaccumulation Bird conservation Cricket DDE Elementary student Environmental education Estuary Knowledge Laguna de Terminos Mangrove forest Mexico Organochlorine Preserve Riparian ecosystem Sediment Spider Warblers Workshop Herrera-Herrera, Jose Rafael Assessment of Organochlorine Pesticide Exposures in Riparian Ecosystems and Environmental Education in Southeastern Mexico |
| author |
Herrera-Herrera, Jose Rafael |
| author_facet |
Herrera-Herrera, Jose Rafael |
| author_sort |
Herrera-Herrera, Jose Rafael |
| title |
Assessment of Organochlorine Pesticide Exposures in Riparian Ecosystems and Environmental Education in Southeastern Mexico |
| title_short |
Assessment of Organochlorine Pesticide Exposures in Riparian Ecosystems and Environmental Education in Southeastern Mexico |
| title_full |
Assessment of Organochlorine Pesticide Exposures in Riparian Ecosystems and Environmental Education in Southeastern Mexico |
| title_fullStr |
Assessment of Organochlorine Pesticide Exposures in Riparian Ecosystems and Environmental Education in Southeastern Mexico |
| title_full_unstemmed |
Assessment of Organochlorine Pesticide Exposures in Riparian Ecosystems and Environmental Education in Southeastern Mexico |
| title_sort |
assessment of organochlorine pesticide exposures in riparian ecosystems and environmental education in southeastern mexico |
| publisher |
Miami University / OhioLINK |
| publishDate |
2014 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=miami1401975159 |
| work_keys_str_mv |
AT herreraherrerajoserafael assessmentoforganochlorinepesticideexposuresinriparianecosystemsandenvironmentaleducationinsoutheasternmexico |
| _version_ |
1719436376749899776 |