Multiple long-term trends and trend reversals dominate environmental conditions in a man-made freshwater reservoir
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F18%3A43897307" target="_blank" >RIV/60076658:12310/18:43897307 - isvavai.cz</a>
Alternative codes found
RIV/60077344:_____/18:00488010 RIV/60076658:12510/18:43897307
Result on the web
<a href="https://reader.elsevier.com/reader/sd/pii/S0048969717334800?token=5A62C6F1BF0EAD06A4739019A8F83BB08D5F494CCEAC2AC96EE36922A08D3E764802E51FEE17545117FB87E85EC9ED93" target="_blank" >https://reader.elsevier.com/reader/sd/pii/S0048969717334800?token=5A62C6F1BF0EAD06A4739019A8F83BB08D5F494CCEAC2AC96EE36922A08D3E764802E51FEE17545117FB87E85EC9ED93</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.scitotenv.2017.12.061" target="_blank" >10.1016/j.scitotenv.2017.12.061</a>
Alternative languages
Result language
angličtina
Original language name
Multiple long-term trends and trend reversals dominate environmental conditions in a man-made freshwater reservoir
Original language description
Man-made reservoirs are common across the world and provide a wide range of ecological services. Environmental conditions in riverine reservoirs are affected by the changing climate, catchment-wide processes and manipulations with the water level, and water abstraction from the reservoir. Long-term trends of environmental conditions in reservoirs thus reflect a wider range of drivers in comparison to lakes, which makes the understanding of reservoir dynamics more challenging. We analysed a 32-year time series of 36 environmental variables characterising weather, land use in the catchment, reservoir hydrochemistry, hydrology and light availability in the small, canyon-shaped Rimov Reservoir in the Czech Republic to detect underlying trends, trend reversals and regime shifts. To do so, we fitted linear and piecewise linear regression and a regime shift model to the time series of mean annual values of each variable and to principal components produced by Principal Component Analysis. Models were weighted and ranked using Akaike information criterion and the model selection approach. Most environmental variables exhibited temporal changes that included time-varying trends and trend reversals. For instance, dissolved organic carbon showed a linear increasing trend while nitrate concentration or conductivity exemplified trend reversal. All trend reversals and cessations of temporal trends in reservoir hydrochemistry (except total phosphorus concentrations) occurred in the late 1980s and during 1990s as a consequence of dramatic socioeconomic changes. After a series of heavy rains in the late 1990s, an administrative decision to increase the flood-retention volume of the reservoir resulted in a significant regime shift in reservoir hydraulic conditions in 1999. Our analyses also highlight the utility of the model selection framework, based on relatively simple extensions of linear regression, to describe temporal trends in reservoir characteristics. This approach can provide a solid basis for a better understanding of processes in freshwater reservoirs.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
<a href="/en/project/LM2015075" target="_blank" >LM2015075: National Infrastructure for Comprehensive Monitoring of Soil and Water Ecosystems in the Context of Sustainable Use of the Landscape</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Science of the Total Environment
ISSN
0048-9697
e-ISSN
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Volume of the periodical
624
Issue of the periodical within the volume
MAY 15 2018
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
24-33
UT code for WoS article
000426355900004
EID of the result in the Scopus database
2-s2.0-85037674646