Ecology3

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Published on February 28, 2014

Author: vannessangel24

Source: slideshare.net

ECOLOGY By: MARIA KRISIA FAE DELOS REYES DE ASIS, BSN-RN

Please bring out any piece of paper and prepare for a quiz..

question: 1. Where are INORGANIC elements primarily held (reservoir)?

question: 2-5. What are the 4 principal elements in living things?

question: 6. Where do the cycling of materials in the ecosystems usually begin?

question: 7. What process in the water cycle involves the release of water vapor into the air by plants?

question: 8. What cycle is closely linked to the carbon cycle?

question: 9. Nitrogen makes up _____% of the atmosphere?

question: 10. What bacteria converts nitrogen gas into ammonia to be used by living organisms?

question: 11. Nitrogen makes up _____% of the atmosphere?

question: 12-15. What are the 5 cycles discussed during the last lecture? 

You have 30 seconds to finalize your answers..

BIOMES – also known as LIFE ZONES - composed of many ecosystems— smaller communities of plants and animals and their habitats within special regions - are sometimes named by the climax vegetation (stable plant communities) of the region

BIOMES – The ecosystems of a particular biome tend to have plants with similar growth forms and animals with similar feeding habits - The characteristics of biomes are a direct result of temperature and rainfall patterns. These patterns result from the features of the Earth (mountains, valleys, etc.)

BIOMES – 2 physical factors: a. Amounts of heat from the sun that reach the different parts of the Earth and seasonal variations of heat b. Global atmospheric circulation and the resulting patterns of oceanic circulation

THE SUN AND ITS EFFECT ON CLIMATE – because the Earth is a SPHERE, some parts receive more energy from the sun than others. -Therefore, the greater the LATITUDE or distance from the equator, the colder the climate -Seasons occur because the earth is tilted on its axis

THE SUN AND ITS EFFECT ON CLIMATE

ATMOSPHERE AND ITS EFFECT ON CLIMATE – the climate of a region is determined primarily by its latitude and wind patterns -These factors interacting with earth features result in particular rainfall patterns -Temperature, rainfall, and altitude result in the vegetative growth of a specific area

LIFE ON LAND: biomes of the world A. TROPICAL RAIN FORESTS B. SAVANNAS C. DESERTS D. TEMPERATE GRASSLANDS E. TEMPERATE DECIDUOUS FORESTS F. TAIGA G. TUNDRA - Arranged by their distance from the equator

TROPICAL RAIN FORESTS - is the most complex biome in the world - found at low elevations in the tropics at the equator where it is warm and wet - characterized by a dense tree canopy—tree top branches and leaves that overlap with each other - The thick canopy allows little sunlight to penetrate, so rain forest soils are nutrient-poor

SAVANNAS - Found near the equator in areas with less annual rainfall - This climate supports grasslands with scattered shrubs and trees - It also supports herds of grazing herbivores such as zebra, buffalo, etc. which are eaten by carnivores

DESERTS - Biomes that have 10 inches or less of precipitation annually - Vegetation is characteristically sparse - Because of a lack of moisture in the soil and low humidity in the atmosphere, most of the sunlight penetrates to the ground

DESERTS - Daytime temperatures can reach 55 C (131 F) in the shade. At night the desert floor radiates heat back to the atmosphere, and the temperature can drop to near freezing - Plants are those with tissues adapted to store water, such as cacti

DESERTS - Daytime temperatures can reach 55 C (131 F) in the shade. At night the desert floor radiates heat back to the atmosphere, and the temperature can drop to near freezing - Plants are those with tissues adapted to store water, such as cacti

DESERTS - Animals have also adapted themselves to cope with limited water, by limiting activity, living in deep burrows and emerging only at night, or storing water in tissues (camels)

TEMPERATE GRASSLANDS - Also known as prairies, steppes, pusztas, veld, or pampa - All grasslands have 10-30 inches of rainfall annually (less than savannas and more than deserts) - Characterized by large quantities of perennial grasses since rainfall is insufficient to supports forests or shrublands

TEMPERATE GRASSLANDS - Often populated by burrowing rodents (prairie dogs), and grazing herbivores - Highly productive when converted to agriculture

TEMPERATE DECIDUOUS FORESTS - Supports the growth of trees that lose their leaves during winter (DECIDUOUS) - Climates in these are areas where summmers are warm, winters are cold, and precipitation is moderate and well distributed throughout the year - Same as tropical forest, but with more vegetation on the forest floor

TAIGA - Characterized by long, cold winters with little precipitation; most of the precipitation falls in the summers - Because of the latitude where taiga occurs, the days are short in winter and long in the summer - Light, warmth, and rainfall of the summer allows plants to grow rapidly

TUNDRA - Encircles the top of the world, covering 1/5 of the earth’s land surface - Dominated by scattered patches of grasses, sedges, and lichens with some small trees - Very low annual precipitation (desert-like levels) which are unavailable to plants because it freezes for most of the year

TUNDRA - In brief summers, some of the ice melts and forms puddles in the ground - Many animal species nest in the tundra in the summer and return to warmer climates for the winter

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