Aquatic Life Zones: 2 major categories 1.Marine (saltwater) Or 2.Freshwater Types of organisms...
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Aquatic Life Zones: 2 major categories 1. Marine (saltwater) Or 2. Freshwater Types of organisms determined by: • Salinity • Temperature • Sunlight availability • D.O. (dissolved oxygen) • Nutrient availability
Aquatic Life Zones: 2 major categories 1.Marine (saltwater) Or 2.Freshwater Types of organisms determined by: Salinity Temperature Sunlight availability
Aquatic Life Zones: 2 major categories 1.Marine (saltwater) Or
2.Freshwater Types of organisms determined by: Salinity Temperature
Sunlight availability D.O. (dissolved oxygen) Nutrient
availability
Slide 2
Major types of Organisms Plankton: small free-floating
organisms Phytoplankton: plant-like Photosynthetic diatoms,
protists, etc
Slide 3
- Zooplankton: animal-like Heterotrophic Protozoans Larvae
Copopods, cnidarians, krilletc. - Ultraplankton : TINY (less than 2
micrometers) includes bacteria
Slide 4
Benthos (benthic organisms): bottom dwellers anchor to one
spot, burrow, or walk along bottom
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Nekton: active swimmers dont follow currents
Slide 6
Slide 7
Baleen whales: filter feeders Plates (baleen) hang from upper
jaw filter plankton from water includes: humpbacks and blue
whales
Slide 8
Toothed whales: teeth used to bite and chew food includes:orca
(killer whale) and sperm whale
Slide 9
Marine Lifezone: Subcategories: * Coastal * Open Ocean (Sea)
euphotic zone bathyal zone abyssal zone
Slide 10
Subcategory: Coastal High tide to Continental shelf (Ample
sunlight) high NPP 90% of all marine species
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1. Coral reefs: MOST biodiverse areas of all aquatic life zones
The Aquatic Rainforest Hundreds of thousands of coral polyps
excrete CaCO 3 skeletons
Removal (aquariums/jewelry) Pollution Damage (tourists,
anchors, natural disasters) Overfishing Cyanide/dynamite fishing 1
m 2 of reef killed for every fish caught
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2. Intertidal zone: shoreline between low and high tide Tides
caused by gravitational pull of moon Organisms adapted to HARSH
conditions
Slide 15
3. Barrier Islands: islands separated from the mainland by a
shallow sound, bay, or lagoon
Slide 16
Constantly shifting beaches due to erosion Can be helped with a
jetty
Slide 17
Dunes backbone that provides stability Plants hold sand in
place Protect from natural disasters
5. Estuary: where freshwater meets saltwater (mouth of a
river)
Slide 20
Slide 21
Marine Lifezone: Subcategories: * Coastal * Open Ocean (Sea)
euphotic zone bathyal zone abyssal zone
Slide 22
Subcategory: Open Ocean 1. Euphotic zone: top Sunlight layer:
phtyoplankton = photosynthesis: HIGH D.O. (dissolved oxygen) and
low dissolved CO 2, big fish and mammals 2. Bathyal zone: middle
Dimly lit little/no producers, zooplankton, smaller fish 3. Abyssal
zone: bottom Dark, cold, little D.O., nutrients on floor
Chemosynthetic bacteria at hydrothermal vents