Презентация "The peculiarity of natural photoautotrophic terraneous and freshwater ecosystems" 9 класс
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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
- 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.
- 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.
- 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.
- 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 most numerous animals are coyotes deer and armadillos.
- The producers are organisms of fitoplankton - algas (green and diatomic) and tsianobakteriya.
- . 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 main consumers in water ecosystems are zooplankton –phytophagous (cladocerans, e.g. daphnids) and sarcophagous, (e.g. copepods Cyclops).
- The fish that form nekton. Among the fish there are
- phytophages, zoophages and euryphages, and very often fish “tastes” are changing with age.
- 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).
- Amphibians (newt, frog, fire-bellied toad) and reptiles (fresh-water turtle, water snake).
- 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 matter cycle in freshwater ecosystems is fast and is measured in months rather than years.
- There are several natural lakes and hundreds of man-made ones in Texas.
- 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 is an annual transient home for great numbers of migrant birds; it guarantees winter habitation for almost all local bird species.
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