Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Chris A. Extence"'
Publikováno v:
River Research and Applications. 33:1596-1605
Sedimentation of river beds is a key pressure impacting riverine ecological communities. Research has identified the need for new approaches to help demonstrate and quantify the impacts of excessive fine-sediment deposition on benthic macroinvertebra
Autor:
Chris A. Extence, David Leeming, John Murray-Bligh, Drew Constable, Judy England, Richard P. Chadd, Michael J. Dunbar, Paul J. Wood
Publikováno v:
Ecological Indicators. 82:344-356
In rivers, the ecological effects of drought typically result in gradual adjustments of invertebrate community structure and functioning, punctuated by sudden changes as key habitats, such as wetted channel margins, become dewatered and dry. This pap
Autor:
Chris A. Extence, Richard E. Brazier, Gary Bilotta, Richard P. Chadd, G. Arbociute, Matt D. Turley
Publikováno v:
River Research and Applications. 33:1585-1595
Deposited fine sediment is an essential component of freshwater ecosystems. Nonetheless, anthropogenic activities can modify natural fine sediment levels, impacting the physical, chemical and biological characteristics of these ecosystems. An ability
Publikováno v:
Journal of Geophysical Research: Earth Surface. 121:890-906
Sediment transport is regarded as an abiotic process driven by geophysical energy, but zoogeomorphological activity indicates that biological energy can also fuel sediment movements. It is therefore prudent to measure the contribution that biota make
Publikováno v:
Ecological Indicators. 63:23-28
Invasive species represent one of greatest threats to aquatic biodiversity globally and are widely acknowledged to be instrumental in modifying native community structure. Despite this, little is known about how the increasing range expansion of inva
Publikováno v:
Ecological Indicators. 54:82-86
The Proportion of Sediment-sensitive Invertebrates (PSI) index is a biomonitoring tool that is designed to identify the degree of sedimentation in rivers and streams. Despite having a sound biological basis, the tool has been shown to have only a mod
Evaluation of a fine sediment biomonitoring tool across a wide range of temperate rivers and streams
Publikováno v:
Freshwater Biology. 59:2268-2277
SUMMARY 1. Elevated levels of fine sediment (suspended and deposited) are a common cause of ecological degradation in freshwater ecosystems. However, it is time-consuming and expensive to monitor these parameters to support national and international
Autor:
Thomas P. Worrall, Michael J. Dunbar, Cedric Laize, Paul J. Wood, Wendy A. Monk, Chris A. Extence
Publikováno v:
Hydrological Sciences Journal. 59:645-658
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. In this paper we examine river flow regimes across
Publikováno v:
Cuadernos de Investigación Geográfica, Vol 40, Iss 1, Pp 7-28 (2014)
The role of biotic forcing in fluvial geomorphology is understudied.This paper investigates the suggestion that the activities of signal crayfish(Pacifastacus leniusculus) can increase suspended sediment fluxes in rivers.Previous field work, supporte
Publikováno v:
Freshwater Biology. 59:353-367
Summary Sedimentation is a major cause of river impairment and water pollution worldwide. However, setting an ecologically meaningful sedimentation target is proving challenging due to significant gaps in the understanding of quantitative links betwe