Benthic and hyporheic macroinvertebrate distribution within the heads and tails of riffles during baseflow conditions

Kate Mathers, Matthew Hill, Paul Wood

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The distribution of lotic fauna is widely acknowledged to be patchy reflecting the interaction between biotic and abiotic factors. In an in situ field study, the distribution of benthic and hyporheic invertebrates in the heads (downwelling) and tails (upwelling) of riffles were examined during stable baseflow conditions. Riffle heads were found to contain a greater proportion of interstitial fine sediment than riffle tails. Significant differences in the composition of benthic communities were associated with the amount of fine sediment. Riffle tail habitats supported a greater abundance and diversity of invertebrates sensitive to fine sediment such as EPT taxa. Shredder feeding taxa were more abundant in riffle heads suggesting greater availability of organic matter. In contrast, no significant differences in the hyporheic community were recorded between riffle heads and tails. We hypothesise that clogging of hyporheic interstices with fine sediments may have resulted in the homogenisation of the invertebrate community by limiting faunal movement into the hyporheic zone at both the riffle heads and tails. The results suggest that vertical hydrological exchange significantly influences the distribution of fine sediment and macroinvertebrate communities at the riffle scale.
Original languageEnglish
Pages (from-to)17-30
Number of pages13
JournalHydrobiologia
Volume794
Issue number1
DOIs
Publication statusPublished - 19 Jan 2017
Externally publishedYes

Fingerprint

riffle
baseflow
macroinvertebrates
macroinvertebrate
tail
sediments
invertebrates
sediment
invertebrate
homogenization
hyporheic zone
distribution
organic matter
fauna
biotic factor
downwelling
environmental factors
benthos
upwelling
habitats

Cite this

@article{9ab6fbaff1bd4929b9e387751d820286,
title = "Benthic and hyporheic macroinvertebrate distribution within the heads and tails of riffles during baseflow conditions",
abstract = "The distribution of lotic fauna is widely acknowledged to be patchy reflecting the interaction between biotic and abiotic factors. In an in situ field study, the distribution of benthic and hyporheic invertebrates in the heads (downwelling) and tails (upwelling) of riffles were examined during stable baseflow conditions. Riffle heads were found to contain a greater proportion of interstitial fine sediment than riffle tails. Significant differences in the composition of benthic communities were associated with the amount of fine sediment. Riffle tail habitats supported a greater abundance and diversity of invertebrates sensitive to fine sediment such as EPT taxa. Shredder feeding taxa were more abundant in riffle heads suggesting greater availability of organic matter. In contrast, no significant differences in the hyporheic community were recorded between riffle heads and tails. We hypothesise that clogging of hyporheic interstices with fine sediments may have resulted in the homogenisation of the invertebrate community by limiting faunal movement into the hyporheic zone at both the riffle heads and tails. The results suggest that vertical hydrological exchange significantly influences the distribution of fine sediment and macroinvertebrate communities at the riffle scale.",
keywords = "Benthos, Hyporheos, Sedimentation, Connectivity, Hydrological exchange",
author = "Kate Mathers and Matthew Hill and Paul Wood",
year = "2017",
month = "1",
day = "19",
doi = "10.1007/s10750-017-3092-8",
language = "English",
volume = "794",
pages = "17--30",
journal = "Hydrobiologia",
issn = "0018-8158",
publisher = "Springer Netherlands",
number = "1",

}

Benthic and hyporheic macroinvertebrate distribution within the heads and tails of riffles during baseflow conditions. / Mathers, Kate; Hill, Matthew; Wood, Paul.

In: Hydrobiologia, Vol. 794, No. 1, 19.01.2017, p. 17-30.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Benthic and hyporheic macroinvertebrate distribution within the heads and tails of riffles during baseflow conditions

AU - Mathers, Kate

AU - Hill, Matthew

AU - Wood, Paul

PY - 2017/1/19

Y1 - 2017/1/19

N2 - The distribution of lotic fauna is widely acknowledged to be patchy reflecting the interaction between biotic and abiotic factors. In an in situ field study, the distribution of benthic and hyporheic invertebrates in the heads (downwelling) and tails (upwelling) of riffles were examined during stable baseflow conditions. Riffle heads were found to contain a greater proportion of interstitial fine sediment than riffle tails. Significant differences in the composition of benthic communities were associated with the amount of fine sediment. Riffle tail habitats supported a greater abundance and diversity of invertebrates sensitive to fine sediment such as EPT taxa. Shredder feeding taxa were more abundant in riffle heads suggesting greater availability of organic matter. In contrast, no significant differences in the hyporheic community were recorded between riffle heads and tails. We hypothesise that clogging of hyporheic interstices with fine sediments may have resulted in the homogenisation of the invertebrate community by limiting faunal movement into the hyporheic zone at both the riffle heads and tails. The results suggest that vertical hydrological exchange significantly influences the distribution of fine sediment and macroinvertebrate communities at the riffle scale.

AB - The distribution of lotic fauna is widely acknowledged to be patchy reflecting the interaction between biotic and abiotic factors. In an in situ field study, the distribution of benthic and hyporheic invertebrates in the heads (downwelling) and tails (upwelling) of riffles were examined during stable baseflow conditions. Riffle heads were found to contain a greater proportion of interstitial fine sediment than riffle tails. Significant differences in the composition of benthic communities were associated with the amount of fine sediment. Riffle tail habitats supported a greater abundance and diversity of invertebrates sensitive to fine sediment such as EPT taxa. Shredder feeding taxa were more abundant in riffle heads suggesting greater availability of organic matter. In contrast, no significant differences in the hyporheic community were recorded between riffle heads and tails. We hypothesise that clogging of hyporheic interstices with fine sediments may have resulted in the homogenisation of the invertebrate community by limiting faunal movement into the hyporheic zone at both the riffle heads and tails. The results suggest that vertical hydrological exchange significantly influences the distribution of fine sediment and macroinvertebrate communities at the riffle scale.

KW - Benthos

KW - Hyporheos

KW - Sedimentation

KW - Connectivity

KW - Hydrological exchange

U2 - 10.1007/s10750-017-3092-8

DO - 10.1007/s10750-017-3092-8

M3 - Article

VL - 794

SP - 17

EP - 30

JO - Hydrobiologia

JF - Hydrobiologia

SN - 0018-8158

IS - 1

ER -