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Microcrustacean (Cladocera, Copepoda) source-sink dynamics in a lowland river ecosystem with a dam reservoir

Maciej Karpowicz
Maciej Karpowicz
   | 22 set 2016
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Article Category: Original research paper
Pubblicato online: 22 set 2016
Pagine: 297 - 303
Ricevuto: 04 set 2015
Accettato: 17 nov 2015
DOI: https://doi.org/10.1515/ohs-2016-0026
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© 2016 Faculty of Oceanography and Geography, University of Gdańsk , Poland. All rights reserved
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Map of the study sites with the location of the sampling stations; square: Siemianówka Reservoir (SR) and Narew River (km distance from the dam:10, 25, 55, 90, 120, 130); circle: oxbow lakes (1 - 40)
Map of the study sites with the location of the sampling stations; square: Siemianówka Reservoir (SR) and Narew River (km distance from the dam:10, 25, 55, 90, 120, 130); circle: oxbow lakes (1 - 40)

Figure 2

Similarity between crustacean communities (%) in the Narew River (grey) and oxbow lakes (black) to crustacean communities in the Siemianówka Reservoir
Similarity between crustacean communities (%) in the Narew River (grey) and oxbow lakes (black) to crustacean communities in the Siemianówka Reservoir

Figure 3

Internal preference mapping of the hydrological connectivity and the cover of macrophytes on the crustacean communities (dot – littoral species; square – planktonic species with eurytopic Chydorus sphaericus and Mesocyclops leuckarti; triangle – benthic species)
Internal preference mapping of the hydrological connectivity and the cover of macrophytes on the crustacean communities (dot – littoral species; square – planktonic species with eurytopic Chydorus sphaericus and Mesocyclops leuckarti; triangle – benthic species)

Characteristics of the study stations in the Siemianówka Reservoir (SR) along the Narew River (distance from the dam: 10, 25, 55, 90, 120, 130 km) and in oxbow lakes (according to Grabowska et al. 2013)

Station name Distance from the dam (km) Character of the river Velocity (m s-1) Average discharge (m3 s-1) Number of samples
SR 0 Reservoir - 4.1 19
10 9.1 Meandering 0.52-0.64 4.6 19
25 25.5 Meandering 0.44-0.51 8.2 19
55 56.0 Meandering 0.35-0.42 13.2 19
90 88.2 Meandering 0.65-0.80 15.1 19
120 118.0 Anastomosing 0.40-0.60 16.0 19
130 130.0 Anastomosing 0.62-0.75 18.2 9
OXBOW LAKES
1-6 0.3-90 Meandering 17
7-32 91-130 Anastomosing 72
33-40 131-180 Regulated 12

Average ± SD population density and frequency of planktonic species in the Siemianówka Reservoir (SR), along the Narew River as in Table 1 and in oxbow lakes. Potential for colonization of oxbow lakes by the planktonic species leaving the Siemianówka Reservoir was expressed by the habitat preference index (HPI).

Diaphanosoma brachyurum Daphnia cucullata Chydorus sphaericus Mesocyclops leuckarti
population density (ind. l-1) SR 12 ± 24 17 ± 11 51 ± 77 41 ± 29
10 1.4 ± 2 15 ± 14 51 ± 46 55 ± 106
25 0.3 ± 0.7 3.1 ± 3.6 5.5 ± 6.4 12.4 ± 35
55 0.1 ± 0.3 2.5 ± 5.4 7.4 ± 20 7 ± 16.7
90 0.01 ± 0.04 0.4 ± 1.2 11.2 ± 42 1.3 ± 2.7
110 0.03 ± 0.1 0.3 ± 0.5 4.3 ± 15 1.4 ± 4.8
130 0.4 ± 1 0.2 ± 0.3 1.2 ± 2.1 0.1 ± 0.2
oxbow lakes 0.7 ± 0.9 1.6 ± 4.6 8.3 ± 23.5 3.3 ± 7
frequency SR 79% 100% 100% 100%
10 44% 100% 94% 100%
25 16% 58% 84% 84%
55 11% 37% 79% 68%
90 5% 11% 63% 58%
110 5% 21% 47% 37%
130 11% 33% 33% 22%
oxbow lakes 4% 17% 67% 51%
HPI -0.99 -0.90 -0.63 -0.77
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