scholarly journals Simulating rewetting events in intermittent rivers and ephemeral streams: A global analysis of leached nutrients and organic matter

2019 ◽  
Vol 25 (5) ◽  
pp. 1591-1611 ◽  
Author(s):  
Oleksandra Shumilova ◽  
Dominik Zak ◽  
Thibault Datry ◽  
Daniel Schiller ◽  
Roland Corti ◽  
...  
Keyword(s):  
Organic Matter ◽  
Global Analysis ◽  
Ephemeral Streams ◽  
Intermittent Rivers

scholarly journals Climate Drivers and Sources of Sediment and Organic Matter Fluxes in Intermittent Rivers and Ephemeral Streams (IRES) of a Subtropical Watershed, USA

Climate ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 117
Author(s):  
Janet Dewey ◽  
Jeff Hatten ◽  
Byoungkoo Choi ◽  
Clay Mangum ◽  
Ying Ouyang
Keyword(s):  
Organic Matter ◽  
River Networks ◽  
Minor Effect ◽  
Ephemeral Streams ◽  
Hydrological Models ◽  
Intermittent Rivers ◽  
Flow Through ◽  
Flux Increase ◽  
Storm Characteristics ◽  
Induced Changes

Climate-driven hydrological models rarely incorporate intermittent rivers and ephemeral streams (IRES) due to monitoring difficulties and their perceived minor effect on river networks. Worldwide, IRES represent approximately 50% of river networks and up to 60% of annual flow and are recognized as conduits and processors of organic matter (OM). Climate induced changes in precipitation and discharge (Q) may impact OM fluxes from IRES. We assessed storm-driven source and flux of total suspended solids (TSS) and OM from small IRES in Mississippi, USA. We used linear Pearson correlations to evaluate relationships between water and storm characteristics (e.g., discharge). Stepwise regression was used to predict change in flux. Dissolved OM was derived from saturated flow through soil whereas particulate OM was derived from channel extension during storms. A power log relationship between Q and materials flux indicated that Q was the driver for flux. A 5% increase in Q within IRES may result in flux increase of 2% TSS and 1.7–2.8% OM. Climate change projections of increased storm intensity over a shorter water year will increase channel extension and soil water transfer resulting in higher material flux to downstream reaches. Climate-driven hydrological models of OM flux should incorporate IRES.

scholarly journals Hydrological, Environmental and Taxonomical Heterogeneity during the Transition from Drying to Flowing Conditions in a Mediterranean Intermittent River

Biology ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 316
Author(s):  
Andy Banegas-Medina ◽  
Isis-Yelena Montes ◽  
Ourania Tzoraki ◽  
Luc Brendonck ◽  
Tom Pinceel ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Base Flow ◽  
Ephemeral Streams ◽  
Biogeochemical Processes ◽  
Flow Conditions ◽  
Intermittent Rivers ◽  
Terrestrial Biodiversity ◽  
Turn Over ◽  
Zero Flow ◽  
Intermittent River

Intermittent rivers and ephemeral streams (IRES) are increasingly studied because of their often-unique aquatic and terrestrial biodiversity, biogeochemical processes and associated ecosystem services. This study is the first to examine the hydrological, physicochemical and taxonomic variability during the dry-wet transition of an intermittent river in the Chilean Mediterranean Zone. Based on 30-years of river monitoring data and the TREHS tool, the hydrology of the river was characterised. Overall, the river shows a significant reduction in streamflow (−0.031 m3/s per year) and a substantial increase of zero flow days (+3.5 days per year). During the transition of hydrological states, variations were observed in the environmental conditions and invertebrate communities. During the drying phase, abundance, richness, and diversity were highest, while species turn-over was highest during base flow conditions. The disconnected pools and the flow resumption phases were characterised by high proportions of lentic taxa and non-insects, such as the endemic species of bivalves, gastropods, and crustaceans, highlighting the relevance of disconnected pools as refuges. Future climatic change scenarios are expected to impact further the hydrology of IRES, which could result in the loss of biodiversity. Biomonitoring and conservation programmes should acknowledge these important ecosystems.

scholarly journals Unlocking our understanding of intermittent rivers and ephemeral streams with genomic tools

2021 ◽  
Author(s):  
Rosetta C Blackman ◽  
Florian Altermatt ◽  
Arnaud Foulquier ◽  
Tristan Lefébure ◽  
Maïlys Gauthier ◽  
...  
Keyword(s):  
Ephemeral Streams ◽  
Intermittent Rivers ◽  
Genomic Tools

scholarly journals Science and Management of Intermittent Rivers and Ephemeral Streams (SMIRES)

2017 ◽  
Vol 3 ◽  
pp. e21774 ◽  
Author(s):  
Thibault Datry ◽  
Gabriel Singer ◽  
Eric Sauquet ◽  
Dídac Jorda-Capdevila ◽  
Daniel Von Schiller ◽  
...  
Keyword(s):  
Ecological Status ◽  
Global Scale ◽  
Research Network ◽  
River Networks ◽  
Ephemeral Streams ◽  
Catchment Scale ◽  
Water Demands ◽  
Raising Awareness ◽  
Intermittent Rivers ◽  
Working Groups

More than half of the global river network is composed of intermittent rivers and ephemeral streams (IRES), which are expanding in response to climate change and increasing water demands. After years of obscurity, the science of IRES has bloomed recently and it is being recognised that IRES support a unique and high biodiversity, provide essential ecosystem services and are functionally part of river networks and groundwater systems. However, they still lack protective and adequate management, thereby jeopardizing water resources at the global scale. This Action brings together hydrologists, biogeochemists, ecologists, modellers, environmental economists, social researchers and stakeholders from 14 different countries to develop a research network for synthesising the fragmented, recent knowledge on IRES, improving our understanding of IRES and translating this into a science-based, sustainable management of river networks. Deliverables will be provided through i) research workshops synthesising and addressing key challenges in IRES science, supporting research exchange and educating young researchers, and ii) researcher-stakeholder workshops translating improved knowledge into tangible tools and guidelines for protecting IRES and raising awareness of their importance and value in societal and decision-maker spheres. This Action is organized within six Working Groups to address: (i) the occurrence, distribution and hydrological trends of IRES; (ii) the effects of flow alterations on IRES functions and services; (iii) the interaction of aquatic and terrestrial biogeochemical processes at catchment scale; (iv) the biomonitoring of the ecological status of IRES; (v) synergies in IRES research at the European scale, data assemblage and sharing; (vi) IRES management and advocacy training.

Genetic, Evolutionary, and Biogeographical Processes in Intermittent Rivers and Ephemeral Streams

2017 ◽  
pp. 405-431 ◽  
Author(s):  
Núria Bonada ◽  
Stephanie M. Carlson ◽  
Thibault Datry ◽  
Debra S. Finn ◽  
Catherine Leigh ◽  
...  
Keyword(s):  
Ephemeral Streams ◽  
Intermittent Rivers
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