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▪ Abstract The hyporheic zone is an active ecotone between the surface stream and groundwater. Exchanges of water, nutrients, and organic matter occur in response to variations in discharge and bed
Parallels and contrasts in the effects of drought on stream macroinvertebrate assemblages
SUMMARY 1. It is axiomatic that unusually long dry periods (droughts) adversely affect aquatic biota. Recovery after drought is rapid by macroinvertebrates that possess strategies to survive drying
Flow variability and the ecology of large rivers
This paper identifies 11 relatively independent measures of hydrological variability that help categorize river types and are each associated with aspects of fish biology that enhance the value of the Flood Pulse Concept for river conservation, management and restoration.
Ecology and management of the hyporheic zone: stream–groundwater interactions of running waters and their floodplains
Abstract Over the last 25 y, stream ecosystem theory has expanded to include explicitly the vertical dimension of surface–groundwater linkages via the hyporheic zone and below alluvial floodplains.
A review of methodology used to measure leaf litter decomposition in lotic environments: Time to turn over an old leaf?
It is recommended that newly fallen, naturally abscissed leaves, bound in leaf packs and tethered to natural substrata, be used in studies attempting to simulate natural leaf decomposition, and some important decisions that must be made in experimental design and implementation are discussed.
An overview of river health assessment: philosophies, practice, problems and prognosis
Assessment of river health should be accurate, timely (warning of deterioration instead of waiting until the patient is terminal), rapid, rapid, and inexpensive, and the connectedness of running waters with their floodplains and catchments must be explicitly recognized.
Invertebrate resistance and resilience to intermittency in a desert stream
Invertebrate responses to water loss were investigated during drying, dry and rewetting phases in Sycamore Creek, an intermittent Sonoran Desert stream. Some taxa were resistant to drying because
Hyporheic rehabilitation in rivers: restoring vertical connectivity
Summary 1. The hyporheic zone below the channel and banks of many rivers where surface water and ground water exchanges plays a crucial functional role in the biogeochemical transformation of
A global experiment suggests climate warming will not accelerate litter decomposition in streams but might reduce carbon sequestration.
It is found that climate warming will likely hasten microbial litter decomposition and produce an equivalent decline in detritivore-mediated decomposition rates, which implies consequences for global biogeochemistry and a possible positive climate feedback.
Biodiversity, functional roles and ecosystem services of groundwater invertebrates
Examples from Australian and New Zealand alluvial aquifers reveal knowledge gaps in understanding the functional importance of most stygofauna, hampering effective protection of currently undervalued groundwater ecosystem services.