review 12: marine communities, environmental, concerns

why are sea otters important for kelp forest communities?

helps keep kelp safe from urchins; urchins eat kelp

what are the primary producers in hydrothermal vent communiteis?

chemosynthetic bacteria

how long could a dead whale feed a community of organisms in deep sea?

50+ yrs

how are thermal vent communites and whale communtities related?

have similar organisms + chemosynthetis

why coral reef ijmportant?

• super productive

• home to 25% of all marine species

• protects coastlines

• coral reef organisms sued in medicine

what are some threats to coral reefs?

• climate change

• coastal development

• ocean acidification

• nuttrient pollution

• over fishing

what is coral bleaching?

• coral expels brownish-green zoothellae in response to stress

• major stress=extreme high temp

what country imports most seafood in world?

usa

overfishing = harvesting exceeds replacement

waht biggest source of oil that ends up in ocean?

biggset problem is runoff/dumping

oil from parking lots roads - storm drains

waht are sone things u can do to reduce pollution in ocean?

stop overpacking things

swoitch to reusable items

3 reasons y we shouldnt use ballons

1. create trash

2. uses up helium

3. metalic ballons cause power outages + wild fires

did humans start the greenhouse effect? hwo ar ehumans affecting it?

• no bs its always been a thing

• increasing bc adding more greenhousegases + carbon dioxide

why are sea levels rising?

• sea levels aldready rising

• thermal expansion + ice melt

• rising bc of warm water - senser, take up more space

are sea levels risng in sf bay already?

yes

how could the lives on ppl in sf bay be affected by sea level?

• sea level rose also worsens coastal erosion

• flooding