J 2019

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

SHUMILOVA, Oleksandra, Dominik ZAK, Thibault DATRY, Daniel VON SCHILLER, Roland CORTI et. al.

Basic information

Original name

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

Authors

SHUMILOVA, Oleksandra, Dominik ZAK, Thibault DATRY, Daniel VON SCHILLER, Roland CORTI, Arnaud FOULQUIER, Biel OBRADOR, Klement TOCKNER, Daniel C. ALLAN, Florian ALTERMATT, Maria ARCE, Shai ARNON, Damien BANAS, Andy BANEGAS-MEDINA, Erin BELLER, Melanie L. BLANCHETTE, Juan F. BLANCO-LIBREROS, Joanna BLESSING, Iola Goncalves BOECHAT, Kate BOERSMA, Michael T. BOGAN, Nuria BONADA, Nick R. BOND, Kate BRINTRUP, Andreas BRUDER, Ryan BURROWS, Tommaso CANCELLARIO, Stephanie M. CARLSON, Sophie CAUVY-FRAUNIE, Nuria CID, Michael DANGER, Bianca DE FREITAS TERRA, Anna Maria DE GIROLAMO, Ruben DEL CAMPO, Fiona DYER, Arturo ELOSEGI, Emile FAYE, Catherine FEBRIA, Ricardo FIGUEROA, Brian FOUR, Mark O. GESSNER, Pierre GNOHOSSOU, Rosa Gomez CEREZO, Lluis GOMEZ-GENER, Manuel A. S. GRACA, Simone GUARESCHI, Bjoern GUCKER, Jason L. HWAN, Skhumbuzo KUBHEKA, Simone Daniela LANGHANS, Catherine LEIGH, Chelsea J. LITTLE, Stefan LORENZ, Jonathan MARSHALL, Angus MCINTOSH, Clara MENDOZA-LERA, Elisabeth Irmgard MEYER, Marko MILISA, Musa C. MLAMBO, Marcos MOLEON, Peter NEGUS, Dev NIYOGI, Athina PAPATHEODOULOU, Isabel PARDO, Petr PAŘIL (203 Czech Republic, guarantor, belonging to the institution), Vladimir PESIC, Pablo RODRIGUEZ-LOZANO, Robert J. ROLLS, Maria Mar SANCHEZ-MONTOYA, Ana SAVIC, Alisha STEWARD, Rachel STUBBINGTON, Amina TALEB, Ross VANDER VORSTE, Nathan WALTHAM, Annamaria ZOPPINI and Christiane ZARFL

Edition

Global Change Biology, Hoboken, USA, Wiley, 2019, 1354-1013

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10617 Marine biology, freshwater biology, limnology

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 8.555

RIV identification code

RIV/00216224:14310/19:00108916

Organization unit

Faculty of Science

UT WoS

000465103600004

Keywords in English

biofilms; leaching; leaf litter; rewetting; sediments; temporary rivers

Tags

Tags

International impact, Reviewed
Změněno: 11/3/2020 15:29, Mgr. Marie Šípková, DiS.

Abstract

V originále

Climate change and human pressures are changing the global distribution and the extent of intermittent rivers and ephemeral streams (IRES), which comprise half of the global river network area. IRES are characterized by periods of flow cessation, during which channel substrates accumulate and undergo physico-chemical changes (preconditioning), and periods of flow resumption, when these substrates are rewetted and release pulses of dissolved nutrients and organic matter (OM). However, there are no estimates of the amounts and quality of leached substances, nor is there information on the underlying environmental constraints operating at the global scale. We experimentally simulated, under standard laboratory conditions, rewetting of leaves, riverbed sediments, and epilithic biofilms collected during the dry phase across 205 IRES from five major climate zones. We determined the amounts and qualitative characteristics of the leached nutrients and OM, and estimated their areal fluxes from riverbeds. In addition, we evaluated the variance in leachate characteristics in relation to selected environmental variables and substrate characteristics. We found that sediments, due to their large quantities within riverbeds, contribute most to the overall flux of dissolved substances during rewetting events (56%-98%), and that flux rates distinctly differ among climate zones. Dissolved organic carbon, phenolics, and nitrate contributed most to the areal fluxes. The largest amounts of leached substances were found in the continental climate zone, coinciding with the lowest potential bioavailability of the leached OM. The opposite pattern was found in the arid zone. Environmental variables expected to be modified under climate change (i.e. potential evapotranspiration, aridity, dry period duration, land use) were correlated with the amount of leached substances, with the strongest relationship found for sediments. These results show that the role of IRES should be accounted for in global biogeochemical cycles, especially because prevalence of IRES will increase due to increasing severity of drying events.

Links

LTC17017, research and development project
Name: Validace bioindikačních metod jako nástrojů pro udržitelný management středoevropských vysychavých toků a přenos těchto metod do praxe (Acronym: InterStreaM)
Investor: Ministry of Education, Youth and Sports of the CR, INTER-COST