Madge Pimentel, Iris; Baikova, Daria; Buchner, Dominik; Burfeid Castellanos, Andrea; David, Gwendoline M.; Deep, Aman; Doliwa, Annemie; Hadžiomerović, Una; Mayombo, Ntambwe Albert Serge; Prati, Sebastian; Spyra, Marzena; Vermiert, Anna-Maria; Beisser, Daniela; Dunthorn, Micah; Piggott, Jeremy J.; Beermann, Arne et al:
Assessing the response of an urban stream ecosystem to salinization under different flow regimes
In: Science of the Total Environment, Band 926 (2024), Artikel 171849
2024Artikel/Aufsatz in ZeitschriftOA Hybrid
BiologieFakultät für Biologie » Aquatische ÖkosystemforschungFakultät für Biologie » PhykologieFakultät für Biologie » BiodiversitätForschungszentren » Zentrum für Wasser- und Umweltforschung (ZWU)
Damit verbunden: 1 Publikation(en)
Titel in Englisch:
Assessing the response of an urban stream ecosystem to salinization under different flow regimes
Autor*in:
Madge Pimentel, IrisUDE
LSF ID
61830
Sonstiges
der Hochschule zugeordnete*r Autor*in
korrespondierende*r Autor*in
;
Baikova, Daria
;
Buchner, DominikUDE
GND
1213484421
LSF ID
61668
ORCID
0000-0002-8499-5863ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Burfeid Castellanos, AndreaUDE
LSF ID
61261
ORCID
0000-0002-8556-3157ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
David, Gwendoline M.
;
Deep, Aman
;
Doliwa, Annemie
;
Hadžiomerović, Una
;
Mayombo, Ntambwe Albert SergeUDE
LSF ID
62264
ORCID
0000-0001-6418-1419ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Prati, Sebastian
;
Spyra, MarzenaUDE
LSF ID
60724
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Vermiert, Anna-Maria
;
Beisser, DanielaUDE
GND
1021794848
LSF ID
57561
ORCID
0000-0002-0679-6631ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Dunthorn, MicahUDE
LSF ID
60109
ORCID
0000-0003-1376-4109ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Piggott, Jeremy J.
;
Sures, BerndUDE
GND
173045731
LSF ID
47226
ORCID
0000-0001-6865-6186ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Tiegs, Scott D.
;
Leese, FlorianUDE
GND
136054838
LSF ID
57731
ORCID
0000-0002-5465-913XORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Beermann, ArneUDE
GND
1155182391
LSF ID
58023
ORCID
0000-0003-0403-0322ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
Erscheinungsjahr:
2024
Open Access?:
OA Hybrid
PubMed ID
Scopus ID
Sprache des Textes:
Englisch
Schlagwort, Thema:
Algae ; Fungi ; Macroinvertebrates ; Organic-matter decomposition ; Parasites ; Primary production
Ressourcentyp:
Text

Abstract in Englisch:

Urban streams are exposed to a variety of anthropogenic stressors. Freshwater salinization is a key stressor in these ecosystems that is predicted to be further exacerbated by climate change, which causes simultaneous changes in flow parameters, potentially resulting in non-additive effects on aquatic ecosystems. However, the effects of salinization and flow velocity on urban streams are still poorly understood as multiple-stressor experiments are often conducted at pristine rather than urban sites. Therefore, we conducted a mesocosm experiment at the Boye River, a recently restored stream located in a highly urbanized area in Western Germany, and applied recurrent pulses of salinity along a gradient (NaCl, 9 h daily of +0 to +2.5 mS/cm) in combination with normal and reduced current velocities (20 cm/s vs. 10 cm/s). Using a comprehensive assessment across multiple organism groups (macroinvertebrates, eukaryotic algae, fungi, parasites) and ecosystem functions (primary production, organic-matter decomposition), we show that flow velocity reduction has a pervasive impact, causing community shifts for almost all assessed organism groups (except fungi) and inhibiting organic-matter decomposition. Salinization affected only dynamic components of community assembly by enhancing invertebrate emigration via drift and reducing fungal reproduction. We caution that the comparatively small impact of salt in our study can be due to legacy effects from past salt pollution by coal mining activities >30 years ago. Nevertheless, our results suggest that urban stream management should prioritize the continuity of a minimum discharge to maintain ecosystem integrity. Our study exemplifies a holistic approach for the assessment of multiple-stressor impacts on streams, which is needed to inform the establishment of a salinity threshold above which mitigation actions must be taken.