Shared Flashcard Set

Details

Ecotoxicology 551
UIUC Ecotoxicology Fall 2007 Final
42
Environmental Studies
Graduate
12/13/2007

Additional Environmental Studies Flashcards

 


 

Cards

Term
Major components of aircraft de-icers
Definition
ethylene glycol, propylene glycol, additives
Term
Endocrine-disrupting phenolic compounds found in surfactants incorporated into anti-icers.
Definition
(alkylphenol polyethoxylate) break down into organic micropollutants
Nonylphenol, octylphenol, and bisphenol A
Term
Major anti-corrosive additives to anti-icers found at an airport in Switzerland
Definition
Benzotrialzole and tolytrialoze
Term
Three characteristics of anti-corrosive additive compounds that makes them important freshwater contaminants
Definition
High polarity, low biodegradability, high water solubility
Term
Effects of ethylene glycol on dissolved oxygen concentrations
Definition
High oxygen demand. Impairs aquatic system
Term
Developmental effects of ethylene glycol diethyl ether in rodents (9)
Definition
Reduced maternal weight gain, embryo toxicity, decreased litter size, decreased fetal weight, malformaties, decreased erthocyte counts, decreased hematocrit and hemoglobin, increased blood urea and creatine, histopathologic changes
Term
Kidney as a major target organ of ethylene glycol
Definition
Fatty change in liver
Term
How anti-icers can impact microbial components of soils
Definition
Toxic to microbes
Term
How runoff from soils can be reduced through land management
Definition
Use of plants to remove toxins
Term
Name of herbicide mixture used in Viet Nam war, of which 2,4-D constituted 50%. (The other 50%, made up of 2,4,5-T was contaminated with 2,3,7,8-tetrachlorodibenzodioxin.)
Definition
Agent Orange
Term
Toxic mechanism of action in plants.
Definition
stimulates uncoordinated growth in some areas while inhibiting others
Term
Type of cancer with which 2,4-D has been linked in dogs and humans beings.
Definition
Non-Hodgkin’s Lymphoma in humans and Malignant Lymphoma in canines,
Term
Primary source of exposure to dogs.
Definition
. Exposure occurs via contact with the herbicide on household lawns and owner apparel after application of the chemical. Dogs are fastidious groomers and ingest the herbicide by licking their paws and coats
Term
Specimen in which 2,4-D can readily be detected two days after a dog has been exposed.
Definition
Urine
Term
Body function in a frog species that was impacted by 2,4-D.
Definition
impairs oocyte maturation by blocking meiotic maturation in vitro
Term
Body function in fish that can be impaired by high concentrations of 2,4-D.
Definition
Olfaction
Term
Alternatives to herbicides to help reduce weeds.
Definition
Mulch
Term
Avian species documented in different outbreaks of AVM.
Definition
bald eagles, American coots, mallards, Canada geese, killdeer, buffleheads, ring-necked ducks, great horned owl, American kestrel
Term
How diagnosis of AVM is established & challenge this may represent.
Definition
microscopic examination of brain tissue for microscopic vacuolizatino of white matter and lesions
Term
Classical clinical signs of AVM.
Definition
Clinical signs are typical of central nervous system damage which includes ataxia, the inability or difficulty to fly, walk or swim. Birds affected by this disease are observed swimming in circles or flying into rock walls
Term
How AVM was reproduced in red-tail hawks.
Definition
Fed GI contents of AVM affected coots to hawks
Term
The invasive macrophyte plant on which the toxigenic organism is believed to grow.
Definition
Hydrilla verticillata
Term
Epiphytic cyanobacteria that was implicated in AVM.
Definition
Stigonematales
Term
Category of herbicide to which atrazine belongs (there are several in this group with similar toxicity).
Definition
triazine
Term
Primary crop on which atrazine is applied.
Definition
corn
Term
Urban sites where animals may encounter atrazine
Definition
pasture, parks, golf courses, christmas tree farms
Term
Mechanism of toxic action of atrazine in plants.
Definition
inhibits photosynthesis
Term
States where atrazine is most widely used & trends over the last 15 years in terms of usage.
Definition
Illinois, Iowa, Indiana, Ohio, Nebraska, Delaware
Term
Major effect of atrazine in frogs.
Definition
hermaphorodite (endrocrine disruptor)
Term
Aspects of environmental fate that increase exposures to atrazine
Definition
Water soluble, can evaporate and be redistributed in rain, potential to bioaccumulate, persists in environment for several months
Term
Ecological roles of algae that may be inhibited by atrazine.
Definition
Food, oxygen production, shelter
Term
Parts of the world where atrazine has been banned in agriculture.
Definition
Europe and Central Asia (Denmark, Germany, Norway, Sweden, Slovenia, Angola, South Africa)
Term
How concentrations of PCBs in orcas whales compare to those in other species.
Definition
highest
Term
Why selective retention of PCBs in orcas is a major concern (because the toxicity of the coplanars tends to be greater).
Definition
Low activity of detoxifying enzymes
Term
How different populations of orcas develop different feeding habits & thus exposures.
Definition
transients- eat other marine mammals and have highest PCB concentrations due to trophic level and bioaccumulation in their prey. Residents eat fish and have high PCB's
Term
Why it would be risky, but still a better idea for an orca to swim in a pod than a clan or community of orcas.
Definition
NOT A LOGICAL QUESTION since several pods made a clan and several clans make a community. What was Val thinking?
Term
How some orcas reflect local sources of PCBs, but others reflect those from far away.
Definition
migration? Global PCB transportation? Long Life?
Term
Basis for different adult female & male PCB burdens.
Definition
Females pass 60% of PCB load to offspring
Term
Impacts of birth order on body burdens on orcas
Definition
First born= highest burden (3-8 times higher than younger siblings)
Term
Late period of life when female orca body burdens increase
Definition
after they stop calving (reproductive sensescence)
Term
Body burdens & life expectancy of males compared to females in orcas
Definition
Females live longer
Term
Major constraints on population recovery for orcas globally
Definition
Historic capture for aquaria, Boat traffic, Food supply pressures, Emergine infections, Global migration, suppressed immune system from PCB's
Supporting users have an ad free experience!