Chapter 8: Aquatic Biodiversity

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Euphotic zone

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64 Terms

1

Euphotic zone

________: Phytoplankton, nutrient level low, dissolved oxygen levels high.

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2

Formation

Tiny animals (polyps) and algae have mutualistic relationships

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3

Warmer ocean temperatures leading to coral bleaching

Kill algae and thus the polyps

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4

Saltwater

The global ocean is divided into 4 areas

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5

Freshwater

Any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids

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6

Saltwater life zones (marine life zones)

Oceans, estuaries, coastlands, shorelines, coral reefs, and mangrove forests

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7

Freshwater life zones

Lakes, rivers, streams, and inland wetlands

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8

Plankton

Free floating

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9

Phytoplankton

Primary producers for most aquatic food webs

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10

Zooplankton

Primary and secondary consumers

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11

Ultraplankton

Tiny photosynthetic bacteria

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12

Nekton

Strong swimmers

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13

Examples

Fish, turtles, whales, etc

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14

Benthos

Bottom dwellers

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15

Examples

Oysters, sea stars, clams, lobsters, crabs, etc

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16

Decomposers

Mostly bacteria

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17

Turbidity

Degree of cloudiness in the water, inhibits photosynthesis

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18

Coastal zone

Warm, nutrient-rich, shallow

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19

Estuaries/Coastal Wetlands

Where rivers meet the sea and seawater mixes with freshwater (ex

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20

Seagrass Beds

Grow underwater in shallow areas, support a variety of marine species, stabilize shorelines, and reduce wave impact

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21

Mangrove forests

Along tropical and subtropical coastlines, 69 different tree species grow in saltwater

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22

Intertidal zone

Rocky shores or sandy shores which have barrier beaches

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23

Euphotic zone

Phytoplankton, nutrient level low, dissolved oxygen levels high

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24

Bathyal zone

Dimly lit, zooplankton and smaller fishes

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25

Abyssal zone

Dark and cold, high levels of nutrients, little dissolved oxygen, deposit feeders, filter feeders

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26

Point source pollution

Discharge pollutants at specific locations

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27

Standing (lentic) bodies of freshwater

Lakes, ponds, inland wetlant=ds

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28

Flowing (lotic) systems of freshwater

Streams and rivers

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29

Littoral zone

Near shore where rooted plants grow, high biodiversity,

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30

Examples

Turtles, frogs, crayfish, and some fish

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31

Limnetic zone

Sunlight area away from shore, main photosynthetic zone, some larger fish

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32

Profundal zone

Deepwater too dark for photosynthesis, low oxygen levels, with some fish

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33

Benthic zone

Decomposers, detritus feeders, and some fish, nourished primarily by dead matter

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34

Oligotrophic Lakes

Low levels of nutrients and low NPP with very clear water

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35

Eutrophic Lakes

High levels of nutrients and high NPP and murky water with high turbidity

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36

Mesotrophic Lakes

Commonly clear water lakes and ponds with beds of submerged aquatic plants and medium levels of nutrients

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37

Cultural Eutrophication

This occurs when sewage, detergents, fertilizers, and other nutrient sources are introduced into the ecosystem as a result of human water pollution, accelerating the aging process

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38

Freshwater

Any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids.

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39

Saltwater life zones (marine life zones)

Oceans, estuaries, coastlands, shorelines, coral reefs, and mangrove forests.

New cards
40

Freshwater life zones

Lakes, rivers, streams, and inland wetlands

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41

Phytoplankton

Primary producers for most aquatic food webs

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42

Zooplankton

Primary and secondary consumers. Single-celled to large invertebrates like jellyfish

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43

Ultraplankton

Tiny photosynthetic bacteria

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44

Benthos

Bottom dwellers

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45

Turbidity

Degree of cloudiness in the water, inhibits photosynthesis

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46

Coastal zone

Warm, nutrient-rich, shallow. Shore to the edge of a continent shelf.

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47

Estuaries/Coastal Wetlands

Where rivers meet the sea and seawater mixes with freshwater (ex. river mouths, inlets, bays, sounds, salt marshes, and mangrove forests.)

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48

Seagrass Beds

Grow underwater in shallow areas, support a variety of marine species, stabilize shorelines, and reduce wave impact.

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49

Mangrove forests

Along tropical and subtropical coastlines, 69 different tree species grow in saltwater

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50

Intertidal zone

Rocky shores or sandy shores which have barrier beaches

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51

Euphotic zone

Phytoplankton, nutrient level low, dissolved oxygen levels high.

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52

Bathyal zone

Dimly lit, zooplankton and smaller fishes

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53

Abyssal zone

Dark and cold, high levels of nutrients, little dissolved oxygen, deposit feeders, filter feeders

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54

Point source pollution

Discharge pollutants at specific locations

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55

Standing (lentic) bodies of freshwater

Lakes, ponds, inland wetlands

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56

Flowing (lotic) systems of freshwater

Streams and rivers

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57

Littoral zone

Near shore where rooted plants grow, high biodiversity,

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58

Limnetic zone

Sunlight area away from shore, main photosynthetic zone, some larger fish

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59

Profundal zone

Deepwater too dark for photosynthesis, low oxygen levels, with some fish

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60

Benthic zone

Decomposers, detritus feeders, and some fish, nourished primarily by dead matter

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61

Oligotrophic Lakes

Low levels of nutrients and low NPP with very clear water

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62

Eutrophic Lakes

High levels of nutrients and high NPP and murky water with high turbidity

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63

Mesotrophic Lakes

Commonly clear water lakes and ponds with beds of submerged aquatic plants and medium levels of nutrients

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64

Cultural Eutrophication

This occurs when sewage, detergents, fertilizers, and other nutrient sources are introduced into the ecosystem as a result of human water pollution, accelerating the aging process.

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