![BG - The influences of historic lake trophy and mixing regime changes on long-term phosphorus fraction retention in sediments of deep eutrophic lakes: a case study from Lake Burgäschi, Switzerland BG - The influences of historic lake trophy and mixing regime changes on long-term phosphorus fraction retention in sediments of deep eutrophic lakes: a case study from Lake Burgäschi, Switzerland](https://bg.copernicus.org/articles/17/2715/2020/bg-17-2715-2020-avatar-web.png)
BG - The influences of historic lake trophy and mixing regime changes on long-term phosphorus fraction retention in sediments of deep eutrophic lakes: a case study from Lake Burgäschi, Switzerland
![Roger Federer of Switzerland returns the ball to Carlos Moya of Spain during their CA-Trophy final match in Vienna October 12, 2003. REUTERS/Heinz-Peter Bader REUTERS HPB Stock Photo - Alamy Roger Federer of Switzerland returns the ball to Carlos Moya of Spain during their CA-Trophy final match in Vienna October 12, 2003. REUTERS/Heinz-Peter Bader REUTERS HPB Stock Photo - Alamy](https://c8.alamy.com/comp/2D3NT6H/roger-federer-of-switzerland-returns-the-ball-to-carlos-moya-of-spain-during-their-ca-trophy-final-match-in-vienna-october-12-2003-reutersheinz-peter-bader-reuters-hpb-2D3NT6H.jpg)
Roger Federer of Switzerland returns the ball to Carlos Moya of Spain during their CA-Trophy final match in Vienna October 12, 2003. REUTERS/Heinz-Peter Bader REUTERS HPB Stock Photo - Alamy
![David Nalbandian of Argentina reacts after losing his match against Stanislas Wawrinka of Switzerland during the BA-CA Tennis Trophy second round in Vienna October 11, 2007. REUTERS/Herbert Neubauer (AUSTRIA Photo Stock - David Nalbandian of Argentina reacts after losing his match against Stanislas Wawrinka of Switzerland during the BA-CA Tennis Trophy second round in Vienna October 11, 2007. REUTERS/Herbert Neubauer (AUSTRIA Photo Stock -](https://c8.alamy.com/compfr/2e7njjx/david-nalbandian-of-argentina-reacts-after-losing-his-match-against-stanislas-wawrinka-of-switzerland-during-the-ba-ca-tennis-trophy-second-round-in-vienna-october-11-2007-reuters-herbert-neubauer-austria-2e7njjx.jpg)
David Nalbandian of Argentina reacts after losing his match against Stanislas Wawrinka of Switzerland during the BA-CA Tennis Trophy second round in Vienna October 11, 2007. REUTERS/Herbert Neubauer (AUSTRIA Photo Stock -
![Roger Federer of Switzerland wipes away a tear as he stands next to Austria's Juergen Melzer (R) during the flower ceremony after the CA trophy final in Vienna October 13, 2002. Federer Roger Federer of Switzerland wipes away a tear as he stands next to Austria's Juergen Melzer (R) during the flower ceremony after the CA trophy final in Vienna October 13, 2002. Federer](https://c8.alamy.com/comp/2D4CCB0/roger-federer-of-switzerland-wipes-away-a-tear-as-he-stands-next-to-austrias-juergen-melzer-r-during-the-flower-ceremony-after-the-ca-trophy-final-in-vienna-october-13-2002-federer-won-6-4-6-1-3-6-6-4-aginst-jiri-novak-of-the-czech-republic-while-melzer-received-a-special-prize-as-best-placed-austrian-reutersheinz-peter-bader-hpws-2D4CCB0.jpg)