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Long-term development of reservoir ecosystems - changes in pelagic food webs and their microbial component
| Content Provider | Semantic Scholar |
|---|---|
| Author | Stra, Vices Vrba, Jaroslav |
| Copyright Year | 2005 |
| Abstract | Reservoirs differ from lakes mostly in three aspects: (i) water residence times usually are not longer than several months, (ii) horizontal heterogeneity induced by the inflowing river water is more pronounced, and (iii) they are historically much younger than lakes. As a consequence, seasonal and long-term dynamics of pelagic food webs reflect the changes in the catchment and hydrological variations more significantly than in lakes, and an ageing and “maturing” of the reservoir ecosystem might affect the pelagic biomass even several decades after filling. Using long-term data sets on pelagic biomass components from canyonshaped reservoirs of different residence time, the following topics are discussed: (1) changes of pelagic bacteria-phytoplankton - zooplankton abundances during ageing as well as longitudinal changes from the river inflow dowstream to the lacustrine part of a reservoir, (2) long-term changes of pelagic bacteria-phytoplankton-zooplankton abundances and seasonal changes of microbial loop in two reservoirs of different residence times. Periods with relative prevalence of bacterial above zooplankton biomass were detected, mostly coinciding with (or following after) the periods with low phytoplankton to zooplankton ratios. |
| Starting Page | 9 |
| Ending Page | 19 |
| Page Count | 11 |
| File Format | PDF HTM / HTML |
| Volume Number | 24 |
| Alternate Webpage(s) | https://ddd.uab.cat/pub/limnetica/02138409v24n1-2/02138409v24n1-2p9.pdf |
| Alternate Webpage(s) | http://www.limnetica.com/Limnetica/Limne24/L24a009_pelagic_food_webs_microbial_reservoir.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
