Protozoan communities in chalk streams

Hydrobiologia ◽  
1992 ◽  
Vol 248 (1) ◽  
pp. 53-64 ◽  
Author(s):  
M. A. Sleigh ◽  
B. M. Baldock ◽  
J. H. Baker
Keyword(s):  
Chalk Streams

Assessing the ecological effects of groundwater abstraction on chalk streams: Three examples from Eastern England

1993 ◽  
Vol 8 (1-2) ◽  
pp. 121-134 ◽  
Author(s):  
Melanie Bickerton ◽  
Geoffrey Petts ◽  
Patrick Armitage ◽  
Emmanuel Castella
Keyword(s):  
Ecological Effects ◽  
Groundwater Abstraction ◽  
Chalk Streams

Long-term investigations of trophic relationships in southern chalk streams

1990 ◽  
Vol 23 (1) ◽  
pp. 113-117 ◽  
Author(s):  
M. LADLE
Keyword(s):  
Trophic Relationships ◽  
Chalk Streams

scholarly journals Habitat use by the fish assemblages of two chalk streams

1997 ◽  
Vol 51 (1) ◽  
pp. 64-79 ◽  
Author(s):  
J. Prenda ◽  
P. D. Armitage ◽  
A. Grayston
Keyword(s):  
Habitat Use ◽  
Fish Assemblages ◽  
Chalk Streams

scholarly journals Watercress and Water Quality: The Effect of Phenethyl Isothiocyanate on the Mating Behaviour ofGammarus pulex

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
Melanie J. Dixon ◽  
Peter J. Shaw
Keyword(s):  
Mating Behaviour ◽  
Sublethal Effect ◽  
Reproductive Behaviour ◽  
Wash Water ◽  
Ex Situ ◽  
Phenethyl Isothiocyanate ◽  
Chalk Streams ◽  
Mean Time

Watercress releases phenethyl isothiocyanate (PEITC) upon wounding as a defence against herbivores. PEITC levels released from watercress farms are elevated due to cropping, washing, and processing and are thought to lead to adverse effects onGammarus pulexin chalk streams. This study elucidates the sublethal effect of PEITC on reproductive behaviour ofG. pulex, employingex situtests to investigate the disruption of precopular pairing under conditions simulatingin situexposure. Mean time to separation of precopular pairs was 89 ± 6 minutes for watercress wash water (1 g watercress per litre water) and 81 ± 15 minutes for pure PEITC (1 μL/L). Re-exposure to watercress wash water to simulate the pulsed operation at a watercress farm did not alter behavioural response. The repeated interruption of reproductive behaviour underin situconditions would impair long-term reproductive success and could explain in part low abundance ofG. pulexdownstream of watercress farms.

The prediction of water temperatures in chalk streams from air temperatures

Hydrobiologia ◽  
1991 ◽  
Vol 210 (3) ◽  
pp. 183-189 ◽  
Author(s):  
A. P. Mackey ◽  
A. D. Berrie
Keyword(s):  
Air Temperatures ◽  
Chalk Streams

Suspended sediment fluxes in chalk streams in the Hampshire Avon catchment, U.K.

Hydrobiologia ◽  
2003 ◽  
Vol 494 (1-3) ◽  
pp. 111-117 ◽  
Author(s):  
M. J. T. Heywood ◽  
D. E. Walling
Keyword(s):  
Suspended Sediment ◽  
Sediment Fluxes ◽  
Chalk Streams

scholarly journals Exploring the Capability of Natural Flood Management Approaches in Groundwater-Dominated Chalk Streams

Water ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2212
Author(s):  
Imogen Barnsley ◽  
Rebecca Spake ◽  
Justin Sheffield ◽  
Julian Leyland ◽  
Tim Sykes ◽  
...  
Keyword(s):  
Positive Impact ◽  
Flood Management ◽  
Evidence Base ◽  
Hydrological Models ◽  
Headwater Catchments ◽  
Management Interventions ◽  
Management Application ◽  
Flow Pathways ◽  
Chalk Streams ◽  
Management Approaches

This study aims to address the gap in the Natural Flood Management (NFM) evidence base concerning its implementation potential in groundwater-dominated catchments. We generated a typology of 198 chalk catchments using redundancy analysis and hierarchical clustering. Three catchment typologies were identified: (1) large catchments, (2) headwater catchments with permeable soils, and (3) catchments with impermeable soils and surfaces (urban and suburban land uses). The literature suggests that natural flood management application is most effective for catchments <20 km2, reducing the likelihood of significant flood mitigation in large catchments. The relatively lower proportion of surface runoff and higher recharge in permeable catchments diminishes natural flood management’s likely efficacy. Impermeable catchments are most suited to natural flood management due to a wide variety of flow pathways, making the full suite of natural flood management interventions applicable. Detailed groundwater flood maps and hydrological models are required to identify catchments where NFM can be used in a targeted manner to de-synchronise sub-catchment flood waves or to intercept runoff generated via groundwater emergence. Whilst our analysis suggests that most chalk groundwater-dominated catchments in this sample are unlikely to benefit from significant flood reductions due to natural flood management, the positive impact on ecosystem services and biodiversity makes it an attractive proposition.

The importance of aquatic margins to invertebrates in English chalk streams

2000 ◽  
Vol 149 (2) ◽  
pp. 213-240 ◽  
Author(s):  
Simon S. C. Harrison
Keyword(s):  
Chalk Streams
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