Lentic Ecosystems explained with a Cup of War

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Across
  1. 2. You spill a nutrient pack into the old cup and then it's filled with algae just stretching out of the cup. You test the water to see what the algae did and you find that its quality is atrocious.
  2. 8. You notice that the old cup grows a bit wide, and to the edges of the cup you see more plant growth of both emergent and submerging plants. You notice that they become habitats too! But what is this called?
  3. 11. You notice that one of the plants in the terrarium was put under the water before the sapling could grow much, but you find that its evolved to work as a marine plant. This is called ___.
  4. 15. You take a week-long vacation and come back to the cup to see that the water has become a bit more foggier and the nutrient levels rose moderately.
  5. 17. After your intensive cup-water research, you know that the animals originate from cool, still freshwater, like invertebrates and aquatic plants. Therefore the cup has animals that are exclusive to it. These are called ___.
  6. 19. Learning from your past mistakes, you make sure to maintain the cup's water clarity and regulate the nutrient levels in order to prevent ___.
  7. 20. You sink the water in a terrarium because you woke up in the middle of the night and were honestly so tired you felt like doing random things. In the morning, you notice that you left it at an angle and the water and it has become a transition zone between your fishes and Mike, The Peaceful Salamander. This is called ___.
  8. 21. The upper part of the cup seems a lot warmer. You're know that it's related to another answer in the crossword, and that this is a definition of a part within that word. But what is it?
  9. 22. The cup is large, deep, complex, with multiple variables changing it exponentially... no, this is not about philosophy. It's colder at the bottom and hotter at the top.
  10. 23. Congratulations! Click see answers and claim your prize!
  11. 24. You research what happened to the cup and discover that it can happen with other underwater plants. You find that the term used to describe this is ____! You did it!
  12. 25. You know that the wide, short, and old cup has a lot of habitats and plants growing at the edges. In scientific terms, this is called ___.
Down
  1. 1. You realize that the the top corner of the cup has become a habitat for some fish and they seem to gather and speak with other organisms there. You know this to be called ___.
  2. 3. You accidentally drop a bunch of small predatory species into it one day and check the cup two days later to find everything is dead. Swearing that you'll never let it happen again, you become a world-trotting vigilante who hunts down ____ ____, known as Seahorse Man!
  3. 4. You leave the cup outside for an hour or two and notice that birds with an Ant-Man size changer have started swimming in the water and using it for shelter/foraging. You realize these are called ___.
  4. 5. It shifts back to being large, and the cup has differing temperatures, and it seems to have a different density the deeper you dip your finger. What is this called?
  5. 6. The cup shifts to be very wide and long but doesn't have any height. The temperature stays the same and the objects in the water seems very simplistic. What is it?
  6. 7. The cup is being held upright, salinity is low or non-existent and the water is nice and stable. What ecosystem is this?
  7. 9. You notice small, pelagic fish at the top of the water, and you grab a microscope and notice that there's phytoplankton there. After studying to become a sworn devotee of protecting the cup, you know the scientific term for this: ___.
  8. 10. You notice that after a few hours the dirt at the top of the water has sunk down to the bottom. You know this to be ___.
  9. 12. After tending the cup for a week, the plant and animal life seem to prosper, the water becomes clearer, and the nutrient levels are lower.
  10. 13. You abandon the cup for a while and you realize that the cup has become so old that its bottom is covered by soil and sediments, and tiny little fish and tadpoles lay at the bottom. And is that... moss? Ew. What monster could let this so terribly!?
  11. 14. After cleaning the old cup you discover that it looks foggier than before. You notice that it's effecting the light that the plants inside receive. You realize that the algae had caused ____!
  12. 16. You realize that the animals in the water have been doing living so long due to its exposure to O2 and that lead to the creation of ___.
  13. 18. You notice that after taking the cup out for a few weeks the edges of the cup started to erode. You notice mini-waves and currents have eroded the already cracked cup edges. This is called ___.