After an extensive forest fire, an affected region of the forest shows signs of ecological succession. Place the steps of succession in the correct order.
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- The orderly progress of communities, starting from bare rock with no soil or traces of a previous community, is calleda. primary succession.b. secondary succession.c. subclimax community.d. climax community.Secondary succession occurs more quickly than primary succession mainly because O a. disturbances in the community exposes more soil b. sunlight is more available C. improved soil is present from the start d. nitrogen-fixing bacteria are present e. rocky areas contain more mineralsChoose the correct statement. a. Secondary succession can occur where the disturbance has left the soil intact. b. Secondary succession occurs when no soil exists in a place. c. Primary succession can take place only when soil is left after a disturbance. d. Sometimes, during a succession, local species inhibits the growth of newcomers, a phenomenon termed as facilitation.
- Primary”succession is succession that:a.involves establishment of primary producers where there were none.b.leads to establishment of a climax community dominated by primaryproducers.c.occurs on newly exposed geologic substrates, not organic soil.d.occurs where organic soils have been exposed but not destroyed bydisturbance.e.occurs after fire or agricultural abandonment.b. After a forest fire O c. After a drought ) d. After snow melts in the spring 6. In which scenario would secondary succession occur? a. After a volcanic eruption b. After a forest fire O c. After a drought O d. After snow melts in the spring 7. Fill in the blanks: succession happens more qu a. Primary, there is no soil. b. Primary, there is soil already. nis no soilVegetationin bajadas of the Arizona Sonoran Desert:a.is largely uniform, as are the soils it grows on.b.is largely uniform, despite variation in the soils it grows on.c.varies in space, primarily reflecting a mosaic of ancient and recentlydisturbed patches.d.varies in space, primarily reflecting a mosaic of soil types.e.varies in space, primarily reflecting patchy enrichment by agriculturalfertilization.
- It is that change is the of the und threat from the of trees as a of change? A Desert B Tropical Rainforest Tundra C. Taiga Grassland E. In which biome would you expect to see plants adapted to fire? Choose at least one correct answer Temperate forest A. Tundra Tropical rainforest C. Grassland Desert E. In which biome would you expect to see darkly pigmented leaves and low plant growth forms Choose at least one correct answer A Taiga Tundra B. C. c) Tropical Rainforest Grassland D. Desert E.Riparian”refers to plant communities occurring:a.in the tropics.b.at high altitudes.c.along the edges of deserts.d.in permanently flooded areas.e. in transitions between riverbanks and uplandareas.Therate of decomposition of leaf litter in woodlands can be strongly influencedby:a.moisture.b.nitrogen content.c.leaf toughness.d. allof the choices apply.e. noneof the choices apply
- The biome that is mostly covered by grass and scatteredtrees, with warm temperatures year-round and pronouncedwet and dry seasons, is thea. tropical deciduous forest.b. savanna.c. desert.d. tropical scrub forest.Why is the destruction of tropical forests so devastating?A. Tropical forests are considered a non-renewable resource due to the amountof time it takes for reforestation to occur.B. Tropical forests cover much less of the surface of the earth than other types offorests and are eliminated faster as a result.C. Tropical forests contain the habitats of the vast majority of life on earth. D. Tropical forests are the primary source of income for many corporations andbusinesses. Why has food production increased despite a net degradation in soil?A. The productivity of the land being used has increased, so more food is beingproduced.B. The widespread use of fertilizers enables more food to be grown than inprevious years.C. Many countries have programs that reward farmers who practice soilconservation techniques.D. Farmers are developing more cropland from wilderness areas now comparedto the past.An example of a pioneer species in primary succession and a pioneer species in secondary succession, respectively, are Select one: a. lichens and grass b. moss and insects c. lichens and trees d. grass and shrubs