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Question

1-What causes a fall algae bloom in a mesotrophic lake?. Would you expect the number of algae to be greater during a bloom in a eutrophic lake compared to a mesotrophic lake. Why?

2- Oligotrophic lakes may not have an algae bloom during fall overturn. Why?

3- Discuss the options that are available for restoring a lake that is eutrophic.

Solution

x.

The xxxxxxxxxx xxxxxxxxxxx xx the xxxxxxx is xxxx xxxx xxxx, a xxxxxxxxxxx lake xxxxxxx xxxx xxx love xxxxxxx it xxxxxxxxx xxxxxyx, yxxxxx perch xxx smallmouth xxxx, xx xxxxxy becoming x eutrophic xxxx xxxx xxxxxxxxx to xxxxxxx of xxxx xxxx xxxxxxx disdain.

xx other xxxxx, xxxx xxxx is xxxxxxxx more xxxxxxxy xx xxxxxxx, common xxxx, sheepshead, xxxxx xxxxx, xxxxxxxxxx bass xxx even xxxxxxx xxx xxxxxxxx. White xxxxx, a xxxxxxxx-xxxxx xxxxxxx xxxx the xxxx Coast, xxx xxxxxxxxxy xxxxxxxxx this yxxx.

Jeff xyxxx, xxx xxxx of xxxx Erie xxxxxxxxx xxxxxxxxxx xxx the xxxxxxxx of xxxxxxxx, xxxxxxxxx xxxx as x mesotrophic xxxx, xxxx xxxx contained xxxxxxxx levels xx xxxxxxxxxx, xxxxxxxxx good xxxxxxxxxx of xxxxxx xxxx xxxx. Increased xxxxxx of xxxxxxxxxx, xxxxxxx, xx changing xxxx Erie xxxx x xxxxxxxxx lake xxxx is xxxx xxxxxxxxx xx those xxxxxxx of xxxx xx xxxxxxy catch xxx throw xxxx. xxxx xxxy high xxxxxxxxxxxxxx of xxxxxxxxxx, x xxxxxxxxx lake xxx evolve xxxx x xyxxxxxxxxxxxx lake, xxxxxxx algal xxxxxx xx xxxxxx and xxxx and xxyxxx-xxxxxxx xxxxxx xxxx can xxxxxx in xxxx xxxxx. xx'x an xxxy explanation xxx xxxx xyxxx this xxxxxx in xxxx xxxx xxx Ontario xxxx-xxxxx areas xx xxx xxxxxxx Basin xx Lake xxxx. xxxx xx significant, xxxxxxx largemouth xxxx xxx x creature xx the xxxxxx xxx xxy weed xxxx. Nearby xxxx xxxxxx xxx West xxxxxx are xxxxx xxx xxxxxx fishing xxxxx in xxx xxxxx xxx largemouth xxxx. Most xxxx xxxxxxx xxxx out xx Lake xxxx, xxxxxx, xxxxx smallmouth xxxx have xxxxyx xxxx xxxxxxxx.

2.

xxxxx and xxxxx xxxxxxx xxxxxx are xxxxxxxxxy divided xxxx xxx xx two xyxxx, oligotrophic xxx xxxxxxxxx. xxxxxxxx the xxxxx meaning xx xxxxx xxx terms xxxxxxx on xxx xxxx, xx is xxxxxxxxy agreed xxxx xxxxxxxxxxxx xxxxx are xxxxxxxxxy unproductive xxx xxxxxxx xxxxx amounts xx aquatic xxxxx xxxxxxxxx, xxxxx eutrophic xxxxx are xxxxxy xxxxxxxxxx xxx experience xxxx fluxes xx xxxxxxx xxxxx nutrients.

xxx problem xx xxxxxxxx xxxxx terms, xxxxxxxxxxxx and xxxxxxxxx, xx xxxxxxx to xxx fact xxxx xxxx xxxxxxx scientists xxx them xx xxxxx xxxy to xxx flux xx xxxxxxx xxxxx nutrients, xxxxx others xxx xxxx xx describe xxx amounts xx xxxxx xxx/xx animal xxxxxxxxxx. Still xxxxxx xxx xxxx to xxxxxx nutrient xxxx xx xxxxx quality. xx reality, xxxx xxx xxxxxxxxxx, the xxxxxxx definitions xxx xxx xxxxxxxxxxy the xxxx since xxxx xxxxxxxx xxxxxx result xx higher xxxxx xxx xxxxxx production xxx decreased xxxxx xxxxxxy. xxxxxxxxxxxx lakes xxxxxxx small xxxxxxx xx xxxxxxxxx but xxxy different xxxxxxx xx xxxxxxx plants xxx animals. xxxxxxxxx xxxxx xxx generally xxxxxxx to xxxxxxx xxxxx xxxxxxx of xxxxxxx plants xxx xxxxxxx xx a xxx species. xxxxxx xxxxxxxx xxxxx to xxxxxxxx that xxxxxxxxx xxxxx xxy contain xx many xxxxxxxxx xxxxxxx xx oligotrophic xxxxx. The xxxxxxxxxx xxxxxxx xxx two xx primarily xxxx xx xxxxxxxxx lakes xxxxx tends xx xx xxx or xxx species xxxx xxxxxxxx xxx population. xxxxxxxy, lakes xxxx xxx xxxxxxxxxxxy deep xx develop x xxxxxxxxxxx (xxx-xxyxx system xxx to xxxxxxy xxxxxxxxxxx xx a xxxxxx of xxx xxxxxxx xxxxxxxxx) and xxxx a xxxxxxx xx xxxxxxxx depletion xx dissolved xxyxxx xx xxx hypolimnion (xxxxxx layer) xxx xxxxxxxxxx xx eutrophic, xxxxx those xxxx xxxxxxxx xxx oxygen xx the xyxxxxxxxxx xxxxxxxxxx xxx period xx thermal xxxxxxxxxxxxxx xxx xxxxxxxxxxxx. T xxx oxygen xxxxxxxxx xx xxx bottom xxxxxx of x xxxx xx dependent xx amounts xx xxxxxxx xxxxxx that xxxxxxx in xxx xxxxxxx xxxxx and xxx morphology xx xxx xxxx. For xxxxx with x xxxxx xxxxxx of xxxxxxx plant xxxxxxxxxx xx xxx epilimnion (xxxxxxx layer), xxxxx xxxx x large xyxxxxxxxxxx volume xxxx xx xxxx the xxyxxx concentration xxxxxxxx xx x lesser xxxxxx than xxxxx xxxx x smal xyxxxxxxxxxx volume. xxxx xxx xxxxxxxxxx, the xxxxxx of xxxxxxx xxxxxx xxxxxxxx in x lake xx xxxxxxxxxx xx the xxxxxxx waters xxxxx xxxxx xxxxxxxxxxx is xxxxxxy restricted xx xxxxxxxxxxx xxxxxx.

In xxxxxxxx to xxxxxxxxxxx xx xxx total xxxxxxx of xxxxxxx xxxxx xxx animal xxxxxxxxxx and xxx xxxxxxx xx types (xxxxxxx) of xxxx, xxx xxx types xx lakes xxxy xx xx the xyxx of xxxxxxxxx xxxxxxxx. xxxxxxxx no xxxxxxxxx species xxxx xxxx xxxxx that xxx only xxxxxxx xx xxx type xx lake, xx xx xxxxxxxxy observed xxxx eutrophic xxxxx xxxx xxxxxxx numbers xx blue-green xxxxx xxx xxxxx fish xxxx as xxxx. xx xxxxx, statements xxxxxx in xxx xxxxxxx xxxxx that x eutrophic xxxx, xxxx xxxx Erie, xx dead. xxxxxxxy, xxxx xx exactly xxxxxxxx to xxx xxxx xxxxxxxxx in xxxx eutrophic xxxxx xxxxxx xxxx problems xxx to xxxxxxxxx xxxxxxx xx life xx all xxxxx. xxx xxxxxxxzxxxxx of x body xx xxxxx xxxxxxxxx all xxxxx of xxxx xxxx xxx planktonic (xxxxxy suspended) xxxxx, xxxxxxxx xxxxx and xxxxxx higher xxxxxx xxxx xxxxxxx in xxxxxxxxx water xx xxx zxxxxxxxxxx, benthic xxxxxxxxx and xxxx. xxxxxxxxxxxx xxxxx arc xxxxxxy deeper xxxx xxxxxxxxx xxxxx. However, xxxx characteristic xx xxxxxy xxxxxxxx and xx is xxxxxxxy xxxx xx state xxxx shallow xxxxx xxx xxxxxxxxxy eutrophic xxx that xx xx xxxxxxxxxxxx lake xxxxx due xx xxxxxxxxxx xx sediments, xx will xxxxxx xxxx xxxxxxxxx.

The xxxxxx of xx xxxxxxxxxxx xxxxxxxx lake xxxxxxxxxxx measure xxxxxx xxxxxxx xx assessment xx its xxxxxxxxx xxxxxxx xx the xxxxxxxxxxx of xxxxxxxxx xxxxxxxyxxx xx prevent xxxxxxx of xxx xxxxxxxxxxx xxx to x lack xx xxxxxxxyxx xxxxxxxxxxxxxx or xxxx development. xxxxxxx xxxxxxxx xx needed xx elucidate xxx xxxxxxx xx a xxxxxx of xxxxxx xxxxxxxxxxx xxxxxxxx on xxx development xx xxxxxxxxx xxxxxxxyxxx.

Using xxx step-by-step xxxxxxxxx, xx xxxxxxxxxx of xxxxxxxxx chances xxx xxx xxxxxx of xxx development xx xxxxxxxxx xxxxxxxyxxx in xxxxxxxx, turbid xxxxxxx xxxxx xxxxx an xxxxxxxx of xxx xxxxx xxxxxxxxxxxy is xxxxxxxx. However, xxx xx xxx complex xxxxxx of xxxxxxx xxxxxxxxxxx xxx occurrence, xxxxxxxxxxxx and xxxxxxx xxxxxxxxxxx xx submerged xxxxxxxyxxx, predictions xxx xxxxx xxxxxxx.

3.

xx the xx-xxxxxxxxxxxxx xx xxxxxxxxx macrophytes xx essential xxx xxx xxxx-xxxx success xx a xxxxxxxxxxx xx xxxxxxx lakes, xxxxxxxx for xxxxx xxxxxxx xx case xx a xxxxxxxx xxxxxxx xx-xxxxxxxxxxxxx and xxxxxxxxxx measures xx xxxx xx mass xxxxxxxxxxxx should xx xxxxxxx xx advance xx any xxxxxxxxxxx xxxxxx. xxx growing xxxxxxx, such xx xxxy xxxxx species, xxx the xxxxxxx xxxxxxxxxx xxx lakes xxxx extensive xxxxxxxxxxxx xxx. xxxxxxxxxx with xxxxxxxx to xxxxxx xx xxxx a xxxxxxxxxxx vegetation, xxxxxxx, xxx xxxxxxx and xxxxxxx research xx xxxxxx xx find xxxxxxxxxx solutions xxx xxxxxxx xxxxx where xxxx developments xx xxxxxxxxx xxxxxxxyxxx result xx conflicts xxxx xxxx xxxxx. In xxxxxx, the xxxxxx xx xxxxx with xxxxxxxxxxx macrophyte xxxx xxxxxxxxxxxx xxy increase xx Germany xx xxx xxxxxxxxx of xxxxxxxx nutrient xxxxx xxy xxxxxxy result xx improved xxxxxxxxxx xxx xxxxxxxyxx growth xxxx in xxxxx xxxxxxx xxxxxxxxxx internal xxxxxxxx.

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