Niches and Biodiversity

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by Dazyle Cagampang2 views·Updated Mar 22, 2021
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  1. Good evening, everyone.
  2. I'm being liberal.
  3. Be Eliana and I'm to report to you about bio
  4. geochemical cycles and biological magnification.
  5. Bio geochemical cycle Any of the natural pathways by which
  6. essential elements of living matter are circulated Bio reference to
  7. live G.
  8. You reverse to the earth, and chemical refers to the
  9. chemicals in cycles that go in circles.
  10. What we're talking about is our earth cycles that involve
  11. living organisms and chemicals the sixth most common elements associated
  12. with organic molecules.
  13. Carbon, hydrogen, nitrogen oxygen both for us and so for
  14. take a variety of chemical forms and may exist for
  15. long periods in the atmosphere, on land, in water or
  16. beneath Earth's surface.
  17. The C W NPS cycles to be easily remembered.
  18. This is an pneumonic for carbon cycle water cycle.
  19. Nitrogen cycle costs for a single.
  20. So for a cycle, carbon cycle.
  21. Carbon dioxide gas exists in the atmosphere, and it's the
  22. salt and water for us, and this is it.
  23. Converts. Carbon dioxide, gas, organic carbon and respirator respiration cycles
  24. the organic carbon back into carbon dioxide.
  25. Does long term storage of organic carbon occurs when mother
  26. from living organisms is buried deep underground and becomes fossilized
  27. volcanic activity and, more recently, human emissions.
  28. Bring the stored carbon back into the carbon cycle.
  29. Water cycle water from the land in oceans.
  30. And there's the atmosphere by evaporation or sublimation, where it
  31. condenses into clouds and falls as rain or snow precipitated.
  32. Water may enter freshwater bodies or infiltrate the soil.
  33. The cycle is complete with surface or groundwater.
  34. In there is the ocean nitrogen cycle.
  35. Nitrogen enters the living from world from the atmosphere via
  36. nitrogen fixing bacteria.
  37. This nitrogen and nitrogenous waste from animals is then processed
  38. back into gas.
  39. Use nitrogen by soil Bacteria, which also supply terrestrial food
  40. webs with organic nitrogen they need was for a cycle
  41. in nature.
  42. Phosphorus exists as the phosphate iron B 0 43.
  43. Weathering of rocks, volcanic activity, religious force weight into the
  44. soil, water and air, where it becomes available to terrestrial
  45. food. Webs, phosphate.
  46. And there's the ocean in surface runoff, groundwater flow and
  47. river flow.
  48. Post made dissolved in ocean water cycles into marine food
  49. webs. Some phosphate from the marine food webs fall to
  50. the ocean floor with forms sediment.
  51. So for a cycle, so for dioxide from the atmosphere
  52. becomes available to terrestrial and marine ecosystems when it dissolved
  53. in precipitation as weak, so for acid or when it
  54. falls. The regulatory as fallout weathering of rocks also make
  55. self. It's available to terrestrial ecosystems.
  56. The composition of living organisms returns so fits to the
  57. ocean, soil and atmosphere, biological magnification or bio magnification, like
  58. a magnifying glass that makes things look bigger.
  59. Biological magnification makes a toxin get bigger or stronger as
  60. well, that this happens when a toxin is ingested or
  61. eaten and move up the food chain from one living
  62. thing to the next.
  63. As it moves up the food chain, that toxin gets
  64. magnified or more concentrated.
  65. This happens because when larger animals, it's smaller.
  66. Animals are prey.
  67. They don't just eat one or two of these animals
  68. during their lifetime.
  69. Sometimes they eat thousands or millions.
  70. Not only are these animals and ingesting their prey, they're
  71. also interesting.
  72. All of their praise toxins best decides.
  73. Let's look at pesticide.
  74. For example, pesticides are toxic or poisonous chemicals that are
  75. used to kill past Some pesticides, like the chemical DDT,
  76. which began used in 1945 creates serious problems for the
  77. environment and our health For over 25 years, DDT was
  78. sprayed on farm crops to kill, damaging and sex.
  79. It was also spread in homes in an airplane cabins
  80. to kill any mosquitoes that might have been inside carrying
  81. the malaria various virus for many years.
  82. Scientists thought DDT was safe to use.
  83. They let they later learned that this was not true.
  84. Although DDT was effective in killing certain tests and slowing
  85. the spread of malaria, it was damaging to the environment
  86. and other living things.
  87. DDT in FOOD Chain When did it t was sprayed
  88. on farm crops.
  89. Some of it ended up nearby in streams, rivers and
  90. oceans. Tiny ocean organisms called plankton that contaminated or polluted
  91. with DDT.
  92. When shellfish eight the plankton, the shellfish became contaminated, too.
  93. Bigger fish would eat the shellfish and see us with
  94. the bigger fish.
  95. These sea creatures also become contaminated when a killer whale
  96. ate the seal it to that point on.
  97. But at time DDT had gotten into the killer whale.
  98. However, it was millions of times stronger than when it's
  99. very contaminated.
  100. The plankton.
  101. This is because toxins like DDT can get started in
  102. build up, accumulates in the fat or fatty tissue of
  103. animals. When animals eat other animals, they're also ingesting the
  104. toxin. Start in the praise fat.
  105. For example, if in one they are little fish, it's
  106. 1000 clanton in a well, it's 1000 little fish, 1000
  107. little fish.
  108. The whale is investing all the toxins that we're in.
  109. A million plant in 1000 times 1000 equals one million.
  110. Life at the top of the food chain, in this
  111. example, plankton at the bottom of the food chain.
  112. Shellfish eat the plankton.
  113. Bigger fish is the shellfish seals it, the bigger fish
  114. and killer whales at the seal.
  115. Since nothing is the killer whale, it sits at the
  116. top of the food chain.
  117. That may sound like goodness for the killer will, but
  118. it isn't due to biological magnification and being at the
  119. top of the food chain.
  120. It suffers most from poisons.
  121. By the time the killer well, it's the contaminated seal.
  122. It's also eating the pesticides from thousands of contaminated fish,
  123. shellfish and plant on the great part of the sales
  124. food chain.
  125. This is how biological magnification happens.
  126. The presence of toxins in flooded this year increases or
  127. magnifies as it goes up the food chain.
  128. Sadly, when baby killer whales nurse from their mothers that
  129. are poisonous chemicals, they can get very sick and die.
  130. Our health in human beings are also at the top
  131. of the food chain.
  132. We can be affected by biological magnification to if we
  133. eat fish that come from contaminated waters.
  134. Our bodies observed the toxins.
  135. If too many toxins in their bodies, it can lead
  136. to serious illness like cancer birth defects.
  137. Some of the worst chemicals activity have been banned or
  138. legal to you, as in the United States.
  139. Legal to use in the United States, scientists and lawmakers
  140. realize that these chemicals are too toxic to the environment.
  141. DDT is one of the famous toxic chemicals, but there
  142. are other toxic pesticides and chemicals that are still legal
  143. to use.
  144. Remember, just because something is legal to use doesn't mean
  145. it's safe.
  146. To use the good news, we have the power to
  147. make, um, we have the power to make choices that
  148. can help protect our health and the environment.
  149. Choose to use less toxic materials whenever possible, learn about
  150. eating organic food and use less toxic pest control.
  151. Ask many products, body care products and other household items.
  152. Together, we can make a big difference, That's all.
  153. Thank you.