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Flashcards in Aquatic Ecology final Deck (324)
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301

Disinfection by-products and birth weight

∆Birth weight (g) vs Concentration (µg/L)
THM, chloroform - decrease function

302

THM

trihalomethane (chloroform)

303

∂13C as a tracer for water condition

less negative ∂13C (lighter?) -- disturbed watershed
more negative -- pristine water source

304

Caffeine

fecal bacteria enriched with caffeine, linear increasing (ng/L)
Mussel Tissue- high caffeine rates for high ∂15N

305

Ibuprofen (ng/L) vs. Caffeine (ng/L)

lakes all in the low left corner, ocean outfall very high in both

306

molecular fingerprinting

take DNA profile of E. coli and compare to animals- tell which animal produced the e.coli
gut bacteria specific to animal
can tell where specific contaminant came from

307

Shawnigan Lake facts

extensive development since 1900, more since 1970
forest harvesting
septic inputs
changes in fisheries from alien species

308

Sooke Lake facts

protected since 1900
raised three time (1910, 1970, 2002)
Introduction of Leech river water through Deception in 1988

309

chloramination

treatment of drinking water with a chloramine disinfectant. Both chlorine and small amounts of ammonia are added to the water one at a time which react together to form chloramine

310

main nutrient linked to algal blooms and toxins

phosphorous

311

Lake sediments

preserve past records
-can be used to see watershed changes and water quality
-sinking of plankton biomass

312

molecular fingerprinting

take DNA profile of E. coli and compare to animals- tell which animal produced the e.coli
gut bacteria specific to animal
can tell where specific contaminant came from

313

Shawnigan Lake facts

extensive development since 1900, more since 1970
forest harvesting
septic inputs
changes in fisheries from alien species

314

HPLC

High Performance Liquid Chromatography

315

chloramination

treatment of drinking water with a chloramine disinfectant. Both chlorine and small amounts of ammonia are added to the water one at a time which react together to form chloramine

316

main nutrient linked to algal blooms and toxins

phosphorous

317

Lake sediments

preserve past records
-can be used to see watershed changes and water quality
-sinking of plankton biomass

318

sediment core procedure

select study area and sampling site-- take sediment cores-- section sediment core-- data analysis-- analyze data

319

sediment core data analysis

Pigment detection and quantification using HPLC

320

HPLC

High Performance Liquid Chromatography

321

Total algal biomass (mg/g organic matter) vs. year, Sooke and Shawnigan lake sediment cores

Sooke lake relatively straight
Shawnigan 3-10X higher biomass than Sooke, large spikes

322

carotenoid pigment vs. year, Sooke and Shawnigan lake sediment cores

Shawnigan higher than sooke
Sooke watershed protection sustained excellent water quality over 100yrs

323

Zeaxanthin pigment (bluegreen algae mg/g) vs. year, Sooke and Shawnigan lake sediment cores

Sooke pretty close to 0 over most of range, almost entirely less than 0.01
Shawn.- all over 0.01, up to 0.04

324

∂15N vs. year, Sooke and Shawnigan lake sediment cores

~equal until 1920's
both have increased
Shawnigan higher from human/animal loading