AP BIO: Seasonal turnovers?

<p>I’d like to clarify that it’s King Phillip Came Over For GOOD SOUP. I met him once, and he definitely said he liked good soup.</p>

<p>And yeah, PMAT is a good one too.</p>

<p>;) You silly bio nerds. But yea, I agree with their mneumonics. I remember there was another one for xylem and phloem (like the sieves and stuff) but it slipped my mind.</p>

<p>uh Xylem is Trachids and Vessels … Phloem is Sieve Tube cells and companion cells…but like…wheres the mnuemomic in that? lol</p>

<p>I don’t know, I’ve never heard a mnemonic for xylem and phloem.</p>

<p>OH I REMEMBER ONE!!! It’s the only one I use. LEO the lion goes GER. It’s for Lose Election Oxidation, Gain Electron Reduction.</p>

<p>Although that’s really more chemistry than biology, I learned it in AP Bio for some reason. I think it had to do with cellular respiration and the ETC.</p>

<p>“Lose Election Oxidation,”</p>

<p>So does that mean Gore and Kerry are gonna get…OXIDIZED in the near future? O_O</p>

<p>I’m pretty sure you meant to say “Lose Electron Oxidation”?</p>

<p>haha…oops? I got the reduction part right… >.<</p>

<p>Beats me, xylem. Oh yea, the flat pig hormone one saved my arse quite a few times.</p>

<p>What about Keep Pond Clean Or Fish Get Sick. That’s the way I learned.</p>

<p>of course he meant to say that, I was making a bad political joke. >_<</p>

<p>That’s way more of an environmental question than a bio question… but more specifically than the above posts, turnover is a phenomenon that happens in the fall and the spring as a result of changing temperatures. Lakes are usually marked by thermal stratification, that is bands of water with different temperatures, higher near the surface and lower near the bottom of the lake. In fall when temperatures drop, warm surface waters become more dense and sink, and cooler bottom waters are stirred up along with sediment and nutrients from the bottom of the lake. In spring surface ice melts (remember ice is less dense than water, so it rises to the top) and is once again cooler than lower waters, causing similar effects as those seen in fall. Therefore, it is an “ice thing,” but not exclusively. </p>

<p>Turnover can result in algal blooms as latent sediments are agitated and made accesssible.</p>

<p>during seasonal turnover, there is no thermocline</p>