Patch scale response of hyporheic invertebrates to fine sediment removal in two chalk rivers.

Octavian Pacioglu; Peter Shaw; Anne Robertson

Patch scale response of hyporheic invertebrates to fine sediment removal in two chalk rivers.

Octavian Pacioglu, Peter Shaw, Anne Robertson

School of Life and Health Sciences

Research output: Contribution to journal › Article › peer-review

Abstract

Abstract: Groundwater-fed permeable catchments are very susceptible to fi ne sediment infi ltration into the stream bed (colmation), leading to potential reductions in hydraulic conductivity and therefore modification of oxygen
and nutrient exchange between hyporheic and surface waters. We investigated the effect of fi ne sediment (2 mm) removal on invertebrate assemblages in the shallow hyporheic zones of two chalk rivers using a fi eld experimental
approach. We used colonization chambers containing one of two treatments: control and unclogged sediments. Anions, cations and dissolved oxygen did not differ signifi cantly between treatments suggesting good connectivity between surface and hyporheic waters. Total Organic Carbon differed signifi cantly between treatments (p0.01) and was higher in the control. In the hyporheic assemblage only Oligochaeta abundance differed signifi cantly between
treatments (p0.01) and was higher in the control. Overall our study suggests that patch-scale restoration of sediments does not alter hyporheic invertebrate community composition in chalk rivers.

Original language	English
Pages (from-to)	283-288
Number of pages	6
Journal	FUNDAMENTAL AND APPLIED LIMNOLOGY
Volume	181
Publication status	Published - 1 Jul 2012

Keywords

colmation, fi ne sediment removal, hydraulic conductivity, hyporheic zone, patch-scale restoration.

Cite this

@article{e034e03b14bc4405bc335adbd491afaf,

title = "Patch scale response of hyporheic invertebrates to fine sediment removal in two chalk rivers.",

abstract = "Abstract: Groundwater-fed permeable catchments are very susceptible to fi ne sediment infi ltration into the stream bed (colmation), leading to potential reductions in hydraulic conductivity and therefore modification of oxygenand nutrient exchange between hyporheic and surface waters. We investigated the effect of fi ne sediment (2 mm) removal on invertebrate assemblages in the shallow hyporheic zones of two chalk rivers using a fi eld experimentalapproach. We used colonization chambers containing one of two treatments: control and unclogged sediments. Anions, cations and dissolved oxygen did not differ signifi cantly between treatments suggesting good connectivity between surface and hyporheic waters. Total Organic Carbon differed signifi cantly between treatments (p0.01) and was higher in the control. In the hyporheic assemblage only Oligochaeta abundance differed signifi cantly betweentreatments (p0.01) and was higher in the control. Overall our study suggests that patch-scale restoration of sediments does not alter hyporheic invertebrate community composition in chalk rivers.",

keywords = "colmation, fi ne sediment removal, hydraulic conductivity, hyporheic zone, patch-scale restoration.",

author = "Octavian Pacioglu and Peter Shaw and Anne Robertson",

year = "2012",

month = jul,

day = "1",

language = "English",

volume = "181",

pages = "283--288",

journal = "FUNDAMENTAL AND APPLIED LIMNOLOGY",

publisher = "E Schweizerbart Science Publishers",

}

TY - JOUR

T1 - Patch scale response of hyporheic invertebrates to fine sediment removal in two chalk rivers.

AU - Pacioglu, Octavian

AU - Shaw, Peter

AU - Robertson, Anne

PY - 2012/7/1

Y1 - 2012/7/1

N2 - Abstract: Groundwater-fed permeable catchments are very susceptible to fi ne sediment infi ltration into the stream bed (colmation), leading to potential reductions in hydraulic conductivity and therefore modification of oxygenand nutrient exchange between hyporheic and surface waters. We investigated the effect of fi ne sediment (2 mm) removal on invertebrate assemblages in the shallow hyporheic zones of two chalk rivers using a fi eld experimentalapproach. We used colonization chambers containing one of two treatments: control and unclogged sediments. Anions, cations and dissolved oxygen did not differ signifi cantly between treatments suggesting good connectivity between surface and hyporheic waters. Total Organic Carbon differed signifi cantly between treatments (p0.01) and was higher in the control. In the hyporheic assemblage only Oligochaeta abundance differed signifi cantly betweentreatments (p0.01) and was higher in the control. Overall our study suggests that patch-scale restoration of sediments does not alter hyporheic invertebrate community composition in chalk rivers.

AB - Abstract: Groundwater-fed permeable catchments are very susceptible to fi ne sediment infi ltration into the stream bed (colmation), leading to potential reductions in hydraulic conductivity and therefore modification of oxygenand nutrient exchange between hyporheic and surface waters. We investigated the effect of fi ne sediment (2 mm) removal on invertebrate assemblages in the shallow hyporheic zones of two chalk rivers using a fi eld experimentalapproach. We used colonization chambers containing one of two treatments: control and unclogged sediments. Anions, cations and dissolved oxygen did not differ signifi cantly between treatments suggesting good connectivity between surface and hyporheic waters. Total Organic Carbon differed signifi cantly between treatments (p0.01) and was higher in the control. In the hyporheic assemblage only Oligochaeta abundance differed signifi cantly betweentreatments (p0.01) and was higher in the control. Overall our study suggests that patch-scale restoration of sediments does not alter hyporheic invertebrate community composition in chalk rivers.

KW - colmation, fi ne sediment removal, hydraulic conductivity, hyporheic zone, patch-scale restoration.

M3 - Article

VL - 181

SP - 283

EP - 288

JO - FUNDAMENTAL AND APPLIED LIMNOLOGY

JF - FUNDAMENTAL AND APPLIED LIMNOLOGY

ER -