Estuaries Flashcards

1
Q

estuary

A

a semi-enclosed body of water that has a free connection with the open sea and within which seawater is diluted measurably with freshwater that is derived from land drainage such as a river

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2
Q

regions of the estuary

A

lower-free connection with open sea, middle-exposure to wide range of salinities, lots of tidal mixing, upper-very low salinity but experiences tides

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3
Q

flocculation

A

particles clump and sink, ionically bound metals also sink, also due to slower flows.high flux of DOC/POC to sediments, detrital food web, creation of mudflat habitats, anoxia due to decomposition, ion substitution/desorption of toxic heavy metals

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4
Q

stenohaline

A

marine organisms able to tolerate only a minimal variation in salinity

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5
Q

euryhaline

A

marine organisms able to tolerate a wide range of salinity variation

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6
Q

anadromy

A

spends most of life feeding in the open ocean but migrates to spawn in freshwater

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7
Q

catadromy

A

spawns in seawater but feeds and spends most of life in estuarine or fresh water

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8
Q

osmoregulator

A

an organism that regulates the concentration of dissolved ions in its body fluids irrespective of changes in the external medium

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9
Q

osmoconformer

A

an organism whose body fluids change directly with a change in the concentrations of dissolved ions in the external medium

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10
Q

hypoxia

A

presence of low concentrations of oxygen in the water that is stressful to marine organisms

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11
Q

allochthonous

A

not from the place

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12
Q

autochthonus

A

from that place

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13
Q

retention time

A

the time a unit of water remains in a water body such as an estuary before being mixed into an outside water body such as the shelf

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14
Q

turnover time

A

the number of phases for the water to be stratified. how long for the bivalves to filter the body of water. if it is longer than retention time….

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