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Practice Reading: Reading Fill in the Blanks ID: #6396 Fish Farms
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Coastal  fish  farms  seem  to  do  less  harm  to  nearby  plants  and  animals  than  previously  believed,  a  new  study  .  And  marine  ecosystems  can  recover  from  this  damage    fast.  But  the  analysis  of  a  single  trout  farm  in  a  Faroe  Islands  fjord  over  nearly  a  year  also  shows  that  these  facilities  need  to  be    carefully,  and  that  theres  a  limit  to  how  many  can    in  a  particular  area  before  its  biodiversity  suffers  lasting  harm.  In  coastal  farms,  fish  live  in  large  cages  hanging  from  pontoons  on  the  surface.  Fish  feces  and  uneaten  food  sink  to  the  seabed,  affecting  its  ecosystem.  Badly-managed  farms  can  also  have  serious  effects  on  the  surrounding  water  column.  The  team  monitored  the  cages,    containing  some  770,000  young  trout.  They  measured  the  flow  of  the  vital  nutrients  carbon  and  nitrogen  through  the  system,  also  tracking  the  farmers  activities,  changing  water  conditions  and  the  quantity  of  waste  deposited  on  the  seabed  below.

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