Презентация "The peculiarity of natural photoautotrophic terraneous and freshwater ecosystems" 9 класс скачать бесплатно

Презентация "The peculiarity of natural photoautotrophic terraneous and freshwater ecosystems" 9 класс


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«Особенности естественных фотоавтотрофных наземных и пресноводных экосистем.

Lesson of Ecology in the 9th form “The peculiarity of natural photoautotrophic terraneous and freshwater ecosystems.”

  • Teacher of Ecology:
  • Pushkina Elena Vladimirovna
  • English Language teacher:
  • Tsatsulina Svetlana Fedorovna
  • Form-9

Special features of formation and population of the forest ecosystems.

  • The main producers are trees, there are a lot of econiches in these ecosystems, dominate detrital food chains with four or less chain links.
  • Circulation of substances is slowed down.

The forest ecosystems.

  • In the broad-leaved forest plant-feeders (elks, hares, deers, roes and a great number of insects) eat only 7-10 % of organic production, no more.

The State of Texas (USA), State of the Lonely Star

  • Natural symbols: a flower - Bluebonnet (literally it is translated as a dark blue hood) - dark blue- purple, from a type of lupines, and the bird-Moskinbirds-mocker, armadillo.

The State of Texas (USA), State of the Lonely Star

  • In the east and the southeast savannas the oak and pine woods remained.
  • The pine woods with impurity of an oak, ficuses, low palm trees, everything is intertwined with evergreen lianas.

The State of Texas (USA), State of the Lonely Star

  • The most numerous animals are coyotes deer and armadillos.

Special features of formation and population of fresh-water ecosystems.

  • The producers are organisms of fitoplankton - algas (green and diatomic) and tsianobakteriya.

The fresh-water ecosystem.

  • . In lakes value of the large plants called macrofits is great. Makrofits are as water plants (duckweeds, water-lilies, jugs), and coastal water - "amphibians" (a cane, a horsetail, a reed).

The fresh-water ecosystem.

  • The main consumers in water ecosystems are zooplankton –phytophagous (cladocerans, e.g. daphnids) and sarcophagous, (e.g. copepods Cyclops).

The fresh-water ecosystem.

  • The fish that form nekton. Among the fish there are
  • phytophages, zoophages and euryphages, and very often fish “tastes” are changing with age.

The fresh-water ecosystem.

  • Many birds such as different species of ducks, seagulls, long-legged, sandpipers, and dabchicks also belong to the consumers of water ecosystems.
  • mammals (beaver, muskrat, mink, and otter).

The fresh-water ecosystem.

  • Amphibians (newt, frog, fire-bellied toad) and reptiles (fresh-water turtle, water snake).

The fresh-water ecosystem.

  • The number of links in the food chain of a lake can amount to six. Three links of the plankton food chain (algae – phytophagous plankton – sarcophagous plankton) is added by three links of nekton (e.g. roach, perch, pike).

The fresh-water ecosystem.

  • The matter cycle in freshwater ecosystems is fast and is measured in months rather than years.

The State of Texas (USA), State of the Lonely Star

  • There are several natural lakes and hundreds of man-made ones in Texas.

The State of Texas (USA), State of the Lonely Star

  • The biggest rivers in Texas are Red River, Trinity, Brothers, Colorado and Rio Grande; a large number of small rivers in the central and western parts often dry up.

The State of Texas (USA), State of the Lonely Star

  • The state of Texas is an annual transient home for great numbers of migrant birds; it guarantees winter habitation for almost all local bird species.