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- W1970610412 abstract "A time series of seston, Secchi depth and chlorophyll a data at a station in Kiel Bight, Western Baltic is evaluated. The time series include 19 years of seston data from 1957 to 1975, 20 years of chlorophyll a data between 1960 and 1989 and 5 years of Secchi depth data between 1965 and 1989. The published chlorophyll a data were corrected according to the results of a comparison of the historic chlorophyll methods with the HPLC method using samples from the location of the reference station. Annual medianLs calculated from logtransformed data from 0 to 15m and between 15 April and 15 October were calculated. The annual medianL seston concentration increased approximately 3.5-fold from 1957 to 1975. The medianLs of Secchi depth decreased from 8.3 m to about 6.1 m between 1965 and 1989 but this trend has low statistical significance because of intra-annual variability. The medianL chlorophyll a concentration shows very strong interannual variation which makes it difficult to quantify a trend in the data, but nevertheless a rank correlation of the chlorophyll medianLs does indicate an increase. The intraannual variability in the chlorophyll data is related to the method used and to the number of data taken per year. It can be concluded that the ecosystem of Kiel Bight has undergone a major change during the period 1957–1975 as demonstrated by seston." @default.
- W1970610412 created "2016-06-24" @default.
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- W1970610412 date "1994-06-01" @default.
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- W1970610412 title "Long-term trends in seston and chlorophyll a in Kiel Bight, Western Baltic" @default.
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- W1970610412 doi "https://doi.org/10.1016/0278-4343(94)90073-6" @default.
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