Volume 61 of Advances in Limnology contains 12 peer reviewed, original papers focusing on the hyporheic zone of running waters (the transient zone in fluvial sediments between ground water and surface water).
The papers of this special issue address new studies carried out in the River Lahn (Germany), a right-bank tributary in the middle reach of the River Rhine. The studies were conducted in order
(i) to perform interdisciplinary research as a basis for understanding the processes relevant to hyporheic zone ecology,
(ii) to identify relevant spatial and temporal scales of abiotic and biological processes and
(iii) to consider a river ecosystem located in a landscape with “average” human impact.
12 original papers deal with four major topics:
Hydrology and hydraulics, emphasizing near bottom and hyporheic flows including bed load transport and colmation (reduction of hydraulic conductivity) of the river bed.
Spatial and temporal dynamics of water constituents and coupling with hydraulic exchange processes.
Microbiology and conversion of water constituents and considering community respiration and nitrification/denitrification processes.
The taxonomic and functional structure of meio- and macrobenthic communities in the hyporheic zone was studied and related to abiotic factors (1-3 above). Special attention was given to biological colmation and decolmation processes of hyporheic interstices and the reproductive success of gravel spawning fish in relation to eutrophication patterns.
The results presented here emphasize the important role of the hyporheic zone as a critical factor of the ecological integrity of many streams and rivers. Therefore, in both river ecology and water resources management, the hyporheic zone must be considered in detail and very carefully in order to analyze its relevance for the ecological functioning of running waters.
The papers address students and scientists at universities and research institutions, managers of aquatic ecosystems and watersheds.
Table of Contents
Borchardt, D. & Pusch, M.:An integrative, interdisciplinary research
approach for the identification of patterns, processes and bottleneck
functions of the hyporheic zone of running waters (with 2 figures and
1 table) 1-7
Saenger, N. & Zanke, U.C.E.: A depth-oriented view of hydraulic
exchange patterns between surface water and the hyporheic zone:
analysis of field experiments at the River Lahn (Germany) (with 8
figures and 2 tables) 9-27
Wawra, B., Saenger, N., Montenegro, H. & Zanke, U.C.E.: Driving forces
for solute transport in the hyporheic zone of the River Lahn
(Germany): numerical simulations (with 6 figures and 2 tables) 29-44
Vollmer, S., Träbing, K. & Nestmann, F.: Hydraulic exchange processes
between surface and subsurface water: determination of spatial and
temporal variability (with 10 figures) 45-65
Seydell, I., Ibisch, R.B. & Zanke, U.C.E.: Intrusion of suspended
sediments into gravel riverbeds: influence of bed topography studied
by means of field and laboratory experiments (with 8 figures and 5
Ibisch, R.B., & Seydell, I. & Borchardt, D.: Influence of periphyton
biomass dynamics on biological colmation processes in the hyporheic
zone of a gravel bed river (River Lahn, Germany) (with 4 figures and 2
Fischer, J., Borchardt, D., Ingendahl, D., Ibisch, R.B., Saenger,
N.,Wawra, B. & Lenk, M.: Vertical gradients of nutrients in the
hyporheic zone of the River Lahn (Germany): relevance of surface
versus hyporheic conversion processes (with 3 figures and 1 table)
Ingendahl, D., ter Haseborg, E., van Der Most, O. & Werner, D.:
Influence of interstitial flow velocity on hyporheic oxygen
consumption and nitrate production (with 3 figures and 3 tables)
ter Haseborg, E., Meier, M., Ingendahl, D. &Werner, D.: Denitrifying
bacterial populations in the hyporheic zone of the River Lahn
(Germany): spatial and temporal distribution and the significance of
external inputs (with 3 figures and 3 tables) 139-159
Altmoos, U.M., Schmidt, J., Bohle, H.-W., Ibisch, R.B. & Borchardt,
D.: Abundance and spatial variability of invertebrate communities in
the River Lahn (Germany) and their relation to hyporheic properties
(with 6 figures and 4 tables) 161-184
Schmidt, J., Borchardt, D., Ibisch., R.B. & Bohle, H.-W.: Direct
measurement of respiration and decolmation activity of hyporheic
meiofauna: first results from a new approach using anesthetizing
substances (with 7 figures and 2 tables) 185-203
Hübner, D., Borchardt, D. & Fischer, J.: Cascading effects of
eutrophication on intragravel life stages of European Grayling
(Thymallus thymallus L.) (with 5 figures and 3 tables) 205-224