Worralletal2014_accepted.pdf (1.97 MB)
Download file

The identification of hydrological indices for the characterization of macroinvertebrate community response to flow regime variability

Download (1.97 MB)
journal contribution
posted on 24.04.2015, 11:00 authored by Thomas P. Worrall, Michael J. Dunbar, Chris A. Extence, Cedric L.R. Laize, Wendy A. Monk, Paul WoodPaul Wood
The importance of flow regime variability for maintaining ecological functioning and integrity of river ecosystems has been firmly established in both natural and anthropogenically modified systems. River flow regimes across lowland catchments in eastern England are examined using 47 variables, including those derived using the Indicators of Hydrologic Alteration (IHA) software. A principal component analysis method was used to identify redundant hydrological variables and those that best characterized the hydrological series (1986–2005). A small number of variables (<6) characterized up to 95% of the statistical variability in the flow series. The hydrological processes and conditions that the variables represent were found to be significant in structuring the in-stream macroinvertebrate community Lotic-invertebrate Index for Flow Evaluation (LIFE) scores at both the family and species levels. However, hydrological variables only account for a relatively small proportion of the total ecological variability (typically <10%). The research indicates that a range of other factors, including channel morphology and anthropogenic modification of in-stream habitats, structure riverine macroinvertebrate communities in addition to hydrology. These factors need to be considered in future environmental flow studies to enable the characterization of baseline/reference conditions for management and restoration purposes.

Funding

TW acknowledges the support of a Loughborough University Department of Geography scholarship with a CASE award from the Centre for Ecology and Hydrology (CEH) and the Environment Agency of England and Wales (EA).

History

School

  • Social Sciences

Department

  • Geography and Environment

Published in

HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES

Volume

59

Issue

3-4

Pages

645 - 658 (14)

Citation

WORRALL, T.P. ... et al, 2014. The identification of hydrological indices for the characterization of macroinvertebrate community response to flow regime variability. Hydrological Sciences Journal, 59 (3-4), pp. 645 - 658.

Publisher

Taylor and Francis / © IAHS Press

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2014

Notes

This is an Accepted Manuscript of an article published by Taylor & Francis Group in Hydrological Sciences Journal on 17/04/2014, available online: http://www.tandfonline.com/10.1080/02626667.2013.825722

ISSN

0262-6667

Language

en