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- Figure 1.16 seems at first to be simply a description of thephysical and chemical properties of a lake. Outline how livingorganisms participate in determining the physical and chemical(i.e., temperature and O2) patterns. Consider organisms livingboth in the lake and on the land surrounding the lake. Consideralso a research report that shows that dense populations of algaesometimes change the temperature structure of lakes by raisingthe thermocline and thereby increasing the thickness of the deep,cold layer; how could algal populations do this, and what couldbe the consequences for deep-water animals?(D) cold winter months4. The oceans affect the biosphere in all of the following waysexcept(A) producing a substantial amount of the biosphere’s oxygen.(B) removing carbon dioxide from the atmosphere.(C) moderating the climate of terrestrial biomes.(D) regulating the pH of freshwater biomes and terrestrialgroundwater.Temperate Semiarid Arid % mm % mm % mm Total precipitation 100 500-1,500 100 200-500 100 0-200 Surface evaporation 33 160-500 50 100-250 70 0-140 Groundwater recharge 34 160-500 20 40-100 0-2 Surface runoff 33 160-500 30 60-150 29 0-60 Data courtesy of Prof. François Zwahlen, Hydrogeology Center, University of Neuchâtel, Switzerland. The amounts of evaporation, groundwater recharge, and surface runoff differ among the different climate regions. Referring to the percentages given in the table, use the following dropdown menus to rank the variability of each component, from lowest to highest. Surface runoff < Groundwater recharge ▼ < Surface runoff Given these data, you can conclude that freshwater from precipitation is distributed unevenly v in the world. Which climate region will likely suffer the least with increasing freshwater shortages? O Arid regions O Semiarid regions O Temperate regions
- As a rule of thumb, each 1% of soil organic matter by weight contains about 1,000 pounds of nitrogen in the plow layer. For a plow layer with 2% soil organic matter, one can expect the amount of N to be mineralized per growing season to equal about: over 120 pounds less than 10 pounds 15 pounds 120 pounds 40 poundsExplain how streams can cleanse themselves andhow these cleansing processes can be overwhelmed.What is wastewater? Describe the state of streampollution in more- and less-developed countries.Give two reasons why lakes cannot cleanse themselves as readily as streams can. Distinguish betweeneutrophication and cultural eutrophication. Listways to prevent or reduce cultural eutrophication.Explain why groundwater cannot cleanse itself verywell. What are the major sources of groundwatercontamination in the United States? List ways to prevent or clean up groundwater contamination. Listsome ways to purify drinking water. Describe the environmental problems caused by the widespread useof bottled water.Location: Australia Precipitation and Temperature ranges Determine the maximum and minimum monthly precipitation amounts and temperatures What producers are found in Australian Desert?? List at leas 3
- Every type of organism in the upper ocean contributes to both recycling of organic matter and sinking of organic matter. Briefly describe 2 interactions between organisms that result in both the recycling and sinking of organic matter. a) Interaction 1: - Brief description of how this interaction results in both the recycling of organic matter in the upper ocean and the sinking of organic matter: b) Interaction 2: - Brief description of how this interaction results in both the recycling of organic matter in the upper ocean and the sinking of organic matter:.Please select any ten (10) of the following terms and provide brief, but complete definitions (1-2 sentences) of: Freshwater wetland, hydric soil, obligate hydrophyte, facultative hydrophyte, halophyte, oligohaline esturarine wetland, spring high tide, low salt marsh, zonation, N.W.I., Ramsar, wetland restorationThe ecosystem of a lake or pond can be divided into 3 zones. Which zone is very cold and consists of the dead remain of organisms?
- What climatic effects on ecosystems are occurring in your climate zone (Texas) including aquatic ecosystems as applicable?Most North American has been converted to cropland O tundra O prairie O boreal forest O desertThe population of Desert Paradise (DP; a fictitious town) hasbeen doubling every 7 years. Most of the new inhabitants are“snowbirds,” people escaping the cold winters of northerlylatitudes. There are no permanent streams or lakes anywherenear DP. In fact, the only standing water occurs in the ponds ofthe many golf courses that have been built recently. The water inthese ponds needs to be replenished almost constantly, or theponds will dry up. The golf courses and yards of the suburbanstyle developments of DP all have lawns of green grass. DP hasbeen growing on a flat, sediment-filled basin between two smallmountain ranges. Much of the water supply of DP comes fromwells. What do you predict will happen to the water table of thearea in coming years, and how might the land surface change asa consequence? Might you suggest a policy to the residents ofDP that could slow the process of change?