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Lakes Ecosystem Food Web

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Emma Johnston

on 15 April 2013

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Transcript of Lakes Ecosystem Food Web

Minnow
-Carnivore Angler
-Carnivore Heron
-Carnivore Coot
-Carnivore Tertiary Consumers Perch
-Carnivore Dragonfly Nymph
-Carnivore Water Boatman
-Carnivore Great Diving Beetle
-Omnivore Fresh Water Prawn
-Omnivore Primary Consumers Water Snail
-Herbivore Caddies Fly Larva
-Herbivore Water Flea
-Herbivore Mayfly Larva
-Herbivore Rotifer
-Herbivore Producers Bulrush
-Producers Algae
-Producer Dead Plants Matter
-Producers Secondary Consumers
Carnivores Secondary Consumers
Herbivores Fish are consumers
Rain, plants, and living things produces nutrients
Sun is energy
Algae, plants, etc... producers

Biotic Factors
Biotic, meaning of or related to life, are living factors. Plants, animals, fungi, protist and bacteria are all biotic or living factors.

Abiotic Factors
Abiotic, meaning not alive, are nonliving factors that affect living organisms. Environmental factors such habitat (pond, lake, ocean, desert, mountain) or weather such as temperature, cloud cover, rain, snow, hurricanes, etc. are abiotic factors.

The ecosystem of a lake includes biotic (living) plants, animals and microorganisms, as well as abiotic (nonliving) physical and chemical interactions. Lake ecosystems are a prime examples of lentic ecosystems. *Lentic* refers to standing or relatively still water, from the Latin *lentus*, which means sluggish. Lentic waters range from ponds to lakes to wetlands , and much of this article applies to lentic ecosystems in general. Lentic ecosystems can be compared with lotic ecosystems which involve flowing terrestrial waters such as rivers and streams. Together, these two fields form the more general study area of freshwater or aquatic ecology Lentic systems are diverse, ranging from a small, temporary rainwater pool a few inches deep to Lake Baikal which has a maximum depth of 1740 m. The general distinction between pools/ponds and lakes is vague, but Brown states that ponds and pools have their entire bottom surfaces exposed to light, while lakes do not. In addition, some lakes become seasonally stratified (discussed in more detail below.) Ponds and pools have two regions: the pelagic open water zone, and the benthic zone , which comprises the bottom and shore regions. Since lakes have deep bottom regions not exposed to light, these systems have
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