446 Aquatic Ecology Flashcards Preview

Biology > 446 Aquatic Ecology > Flashcards

Flashcards in 446 Aquatic Ecology Deck (279)
Loading flashcards...
271

why does NPGO affect survival

directly impacts ∂13C
indirectly: SST--copepods--zooplankton--∂13C--survival

272

what does PDO affect?

leads to ∂15N (trophic level), not connected to survival

273

effects of changing SST

shift species distribution, bring new species, new copepods, effect salmon species?

274

climate change effects

intensify winds, stronger upwelling - may increase productivity, change migration patterns, affect precipitation patterns

275

effects of changes in precipitation

warm dry summers lethal to salmon stock
truck fish from lake to river/ocean?

276

ocean acidification

CO2 sink
CO2 + H2O -- HCO3 + H
decreasing pH
affect critical life stages
killing VI shellfish stocks

277

jack salmon

Chinooks that return to the fresh water one or two years earlier than their counterpart

278

most consisten eutrophication effects

shifts in algal species composition
increased frequency/intensity of nuisance blooms

279

carrying capacity definition

maximum number of individuals of a given species that an area's resources can sustain indefinitely without significantly depleting or degrading those resources