Ch. 54 Ecology Crossword
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
 
 
Down: 2) gas that exists in the atmosphere with nitrogen and oxygen; vital for plants3) any of the fungi or bacteria that absorb nutrients from nonliving organic matter5) all the organisms in a given area as well as the abiotic factors with which they interact6) an autotroph, which collectively make up the trophic level of an ecosystem that ultimately supports all other levels10) biogeochemical cycle of phosphorus through the lithosphere, hydrosphere, and biosphere11) the amount of chemical energy in consumers' food that is converted to their own new biomass during a given time period12) a member of the trophic level of an ecosystem consusting of carnivores that eat herbivores15) the conversion of nitrates into nitrogen gas which is then released into the atmosphere18) a quantitative estimate of an exposure to one or more pollutants below which significant harmful effects on specified sensitive elements of the environment do not occur according to present knowledge19) the recent increase in the Earth's average atmospheric temperature due to an increase in the levels of greenhouse gases20) the amount of light energy converted to chemical energy by autotrophs in an ecosystem22) Breakdown or decay of organic materials.23) the assimilation of atmospheric nitrogen by soil bacteria and its release for plant use on the death of the bacteria Across: 1) is the increase in concentration of a substance that occurs in a food chain as consequence of persistence, food chain energetics, or low rate of degredation3) dead organic matter4) the gross primary production of an ecosystem minus the energy used by the producers for respiration6) an herbivore; an organism in the trophic level of an ecosystem that eats plants or algea7) theory that predators reduce the abundance of herbivores, allowing plants to flourish 8) a graphical representation to show the relative amounts of biomass at each trophic level. 9) the dry weight of organic matter comprising of a group of organisms in a particular habitat13) the cycling of chemical elements between the atmosphere, hydrosphere, lithosphere, and biosphere 14) any of the several levels of a food chain, whose species are based on their main nutritional source16) a graphical representation in the shape of a pyramid showing the distribution of productivity or flow of energy through the trophic levels. 17) a member of a trophic level of an ecosystem consisting of carnivores that eat mainly otehr carnivores21) the basis of the cost-efficiency of any animal production undertaking24) the rate at which a thing is depleted and replaced 25) the effect that agricultural activism has had on the enviroment26) a consumer that derives its energy from nonliving organic matter27) research over a very long time of ecology28) an organism that obtains organic food molecules by eating other organisms or their bi-products29) the total primary production of an ecosystem30) a factor that controls a process, such as organism growth or species population, size, or distribution31) rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water32) the transfer of energy through tropic levels33) the ecosystem response to the addition of artificial or natural substances, such as nitrates and phosphates, through fertilizers or sewage, to an aquatic system based on different cultures34) the environmental circulation of nitrogen, which passes through the food chain, the soil and the open air environment35) the conversion of organic nitrogen to ammonium (NH4+) by the action of decomposers 36) the distinctive heating effect on the Earth's surface due to the gases in the atmosphere that trap solar radiation and emit infrared radiation. 37) a graphical representation in the form of a pyramid showing the feeding relationship and the number of organisms at each trophic level.
 

 

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