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

被引：84

作者：

Shumilova, Oleksandra ^{[1
,2
,3
]}

Zak, Dominik ^{[2
,4
,5
]}

Datry, Thibault ^{[6
]}

von Schiller, Daniel ^{[7
]}

Corti, Roland ^{[6
]}

Foulquier, Arnaud ^{[8
]}

Obrador, Biel ^{[9
]}

Tockner, Klement ^{[1
,2
,10
]}

Allan, Daniel C. ^{[11
]}

Altermatt, Florian ^{[12
]}

Isabel Arce, Maria ^{[1
,13
]}

Arnon, Shai ^{[14
]}

Banas, Damien ^{[15
]}

Banegas-Medina, Andy ^{[16
,17
]}

Beller, Erin ^{[18
]}

Blanchette, Melanie L. ^{[19
]}

Blanco-Libreros, Juan F. ^{[20
]}

Blessing, Joanna ^{[21
]}

Boechat, Iola Goncalves ^{[22
]}

Boersma, Kate ^{[23
]}

Bogan, Michael T. ^{[24
]}

Bonada, Nuria ^{[25
]}

Bond, Nick R. ^{[26
]}

Brintrup, Kate ^{[16
,17
]}

Bruder, Andreas ^{[27
]}

Burrows, Ryan ^{[28
]}

Cancellario, Tommaso ^{[29
]}

Carlson, Stephanie M. ^{[30
]}

Cauvy-Fraunie, Sophie ^{[6
]}

Cid, Nuria ^{[25
]}

Danger, Michael ^{[31
]}

de Freitas Terra, Bianca ^{[32
]}

De Girolamo, Anna Maria ^{[33
]}

del Campo, Ruben ^{[1
,34
]}

Dyer, Fiona ^{[35
]}

Elosegi, Arturo ^{[7
]}

Faye, Emile ^{[36
]}

Febria, Catherine ^{[37
,38
]}

Figueroa, Ricardo ^{[16
,17
]}

Four, Brian ^{[39
]}

Gessner, Mark O. ^{[1
,40
]}

Gnohossou, Pierre ^{[41
]}

Cerezo, Rosa Gomez ^{[34
]}

Gomez-Gener, Lluis ^{[42
]}

Graca, Manuel A. S. ^{[43
]}

Guareschi, Simone ^{[34
]}

Guecker, Bjoern ^{[22
]}

Hwan, Jason L. ^{[30
]}

Kubheka, Skhumbuzo ^{[44
]}

Langhans, Simone Daniela ^{[45
,46
]}

机构：

[1] Leibniz Inst Freshwater Ecol & Inland Fisheries I, Berlin, Germany

[2] Freie Univ Berlin FU, Inst Biol, Berlin, Germany

[3] Trento Univ, Dept Civil Environm & Mech Engn, Trento, Italy

[4] Univ Rostock, Inst Landscape Ecol & Site Evaluat, Rostock, Germany

[5] Aarhus Univ, Dept Biosci, Silkeborg, Denmark

[6] Ctr Lyon Villeurbanne, UR RIVERLY, IRSTEA, Villeurbanne, France

[7] Univ Basque Country UPV EHU, Dept Plant Biol & Ecol, Fac Sci & Technol, Bilbao, Spain

[8] Univ Grenoble Alpes, Lab Ecol Alpine LECA, UMR CNRS UGA USMB 5553, Grenoble, France

[9] Univ Barcelona, Dept Evolutionary Biol Ecol & Environm Sci, Fac Biol, Biodivers Res Inst IRBIO, Barcelona, Spain

[10] Austrian Sci Fund FWF, Vienna, Austria

[11] Univ Oklahoma, Dept Biol, Norman, OK 73019 USA

[12] Univ Zurich, Dept Evolutionary Biol & Environm Studies, Zurich, Switzerland

[13] CSIC, CEBAS, Murcia, Spain

[14] Ben Gurion Univ Negev, Zuckerberg Inst Water Res, Jacob Blaustein Inst Desert Res, Beer Sheva, Israel

[15] Univ Lorraine, UR AFPA, Vandoeuvre Les Nancy, France

[16] Univ Concepcion, Fac Environm Sci, Concepcion, Chile

[17] Univ Concepcion, EULA Chile Ctr, Concepcion, Chile

[18] Univ Calif Berkeley, Dept Geog, Berkeley, CA 94720 USA

[19] Edith Cowan Univ, Mine Water & Environm Res Ctr MiWER, Sch Sci, Perth, WA, Australia

[20] Univ Antioquia, Inst Biol ELICE RESTORES, Medellin, Colombia

[21] Queensland Govt, Dept Environm & Sci, Brisbane, Qld, Australia

[22] Univ Fed Sao Joao del Rei, Dept Geosci, Sao Joao Del Rei, Brazil

[23] Univ San Diego, Dept Biol, San Diego, CA 92110 USA

[24] Univ Arizona, Sch Nat Resources & Environm, Tucson, AZ USA

[25] Univ Barcelona, Grp Recerca Freshwater Ecol Hydrol & Management F, Dept Biol Evolut Ecol & Ciencies Ambientals, Inst Recerca Biodiversitat IRBio, Barcelona, Spain

[26] La Trobe Univ, Ctr Freshwater Ecosyst, Wodonga, Vic, Australia

[27] Univ Appl Sci & Arts Southern Switzerland, Lab Appl Microbiol, Bellinzona, Switzerland

[28] Griffith Univ, Australian Rivers Inst, Nathan, Qld, Australia

[29] Univ Navarra, Biodivers Data Analyt & Environm Qual Grp, Dept Environm Biol, Pamplona, Spain

[30] Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA

[31] Univ Lorraine, LIEC, Metz, France

[32] Univ Estadual Vale Acarau, Ctr Ciencias Agr & Biol, Sobral, Brazil

[33] Natl Res Council IRSA CNR, Water Res Inst, Rome, Italy

[34] Univ Murcia, Dept Ecol & Hydrol, Reg Campus Int Excellence Campus Mare Nostrum, Murcia, Spain

[35] Univ Canberra, Inst Appl Ecol, Canberra, ACT, Australia

[36] CIRAD, UPR HortSys, Montpellier, France

[37] Univ Canterbury, Sch Biol Sci, Christchurch, New Zealand

[38] Univ Windsor, Great Lakes Inst Environm Res, Windsor, ON, Canada

[39] Ctr Rech Nancy, INRA, UAR 1275 DEPT EFPA, Champenoux, France

[40] TU Berlin, Berlin Inst Technol, Dept Ecol, Berlin, Germany

[41] Univ Parakou, Fac Agron, Dept Amenagement & Gest Ressources Nat, Parakou, Benin

[42] Umea Univ, Dept Ecol & Environm Sci, Umea, Sweden

[43] Univ Coimbra, MARE Marine & Environm Sci Ctr, Dept Life Sci, Coimbra, Portugal

[44] Ezemvelo KZN Wildlife, Pietermaritzburg, South Africa

[45] Univ Otago, Dept Zool, Dunedin, New Zealand

[46] BC3, Leioa, Spain

[47] Queensland Univ Technol, ARC Ctr Excellence Math & Stat Frontiers ACEMS, Brisbane, Qld, Australia

[48] Queensland Univ Technol, Inst Future Environm, Sch Math Sci, Brisbane, Qld, Australia

[49] Eawag, Dept Aquat Ecol, Swiss Fed Inst Aquat Sci & Technol, Dubendorf, Switzerland

[50] Julius Kuehn Inst, Inst Ecol Chem Plant Anal & Stored Prod Protect, Berlin, Germany

来源：

GLOBAL CHANGE BIOLOGY | 2019年 / 25卷 / 05期

基金：

欧盟地平线“2020”; 瑞士国家科学基金会;

关键词：

biofilms; leaching; leaf litter; rewetting; sediments; temporary rivers; LEAF-LITTER DECOMPOSITION; FRESH-WATER; FLUORESCENCE SPECTROSCOPY; BIOGEOCHEMICAL PROCESSES; MICROBIAL COMMUNITIES; CLIMATE-CHANGE; FLOW; NITROGEN; DYNAMICS; SEDIMENT;

D O I：

10.1111/gcb.14537

中图分类号：

X176 [生物多样性保护];

学科分类号：

090705 ;

摘要：

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.

引用

页码：1591 / 1611

页数：21

共 100 条

[1] Heterogeneity in leaf litter decomposition in a temporary Mediterranean stream during flow fragmentation [J].