Cross-ecosystem effects of light pollution and invasive signal crayfish on riparian spiders
Ecosystems face multiple abiotic and biotic stressors that interact and extend beyond ecosystem boundaries. Both artificial light at night (ALAN) and invasive species are major threats to freshwater biodiversity in Europe. We used a riparian stream mesocosm facility, with 16 replicated units each co...
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| Language: | English |
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Elsevier
2025-08-01
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| Series: | Global Ecology and Conservation |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2351989425001787 |
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| author | Alessandro Manfrin Jens Schirmel Marina Arias Martin H. Entling Julian Hoffmann Maike Huszarik Sebastian Kolb Anne Schrimpf Thomas Schmidt Mirco Bundschuh Ralf Schulz |
| author_facet | Alessandro Manfrin Jens Schirmel Marina Arias Martin H. Entling Julian Hoffmann Maike Huszarik Sebastian Kolb Anne Schrimpf Thomas Schmidt Mirco Bundschuh Ralf Schulz |
| author_sort | Alessandro Manfrin |
| collection | DOAJ |
| description | Ecosystems face multiple abiotic and biotic stressors that interact and extend beyond ecosystem boundaries. Both artificial light at night (ALAN) and invasive species are major threats to freshwater biodiversity in Europe. We used a riparian stream mesocosm facility, with 16 replicated units each containing an artificial flume and adjacent terrestrial habitat, to investigate the effects of ALAN, the invasive signal crayfish Pacifastacus leniusculus and their interaction. We specifically addressed their impact on aquatic insect emergence and the potential bottom-up control of riparian spiders. As expected, crayfish reduced insect emergence by 35 % after one-week, while ALAN had no significant effect. Moreover, spider numbers, particularly of riparian Tetragnathidae Pachygnatha degeeri and Tetragnatha extensa, correlated positively with insect emergence, indicating indirect negative effects of the crayfish. During the first week of our experiment, spider numbers increased by 22 % in pitfall traps exposed to ALAN, but decreased by 25 % in suction samples. This difference is likely driven by differences in species composition between the two sampling methods. All in all, the direction and strength of crayfish and ALAN effects were taxon- and time-dependent. This study provides evidence that the impact of signal crayfish can extend beyond aquatic systems and suggests that the effects of crayfish invasion and ALAN are largely independent. |
| format | Article |
| id | doaj-art-c4fe4d65a711469c82f69ec0df8368d7 |
| institution | OA Journals |
| issn | 2351-9894 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
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| series | Global Ecology and Conservation |
| spelling | doaj-art-c4fe4d65a711469c82f69ec0df8368d72025-08-20T01:55:31ZengElsevierGlobal Ecology and Conservation2351-98942025-08-0160e0357710.1016/j.gecco.2025.e03577Cross-ecosystem effects of light pollution and invasive signal crayfish on riparian spidersAlessandro Manfrin0Jens Schirmel1Marina Arias2Martin H. Entling3Julian Hoffmann4Maike Huszarik5Sebastian Kolb6Anne Schrimpf7Thomas Schmidt8Mirco Bundschuh9Ralf Schulz10iES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Fortstraße 7, Landau D-76829, Germany; Corresponding author.iES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Fortstraße 7, Landau D-76829, Germany; Eußerthal Ecosystem Research Station (EERES), RPTU Kaiserslautern-Landau, Birkenthalstraße 13, Eußerthal D-76857, GermanyiES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Fortstraße 7, Landau D-76829, Germany; Instituto de Limnología “Dr. Raúl A. Ringuelet” (ILPLA), UNLP-CONICET-FCNyM, Boulevard 120 y 62, CC 712, La Plata, Buenos Aires CP1900, ArgentinaiES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Fortstraße 7, Landau D-76829, GermanyiES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Fortstraße 7, Landau D-76829, GermanyiES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Fortstraße 7, Landau D-76829, Germany; Field Station Fabrikschleichach, Chair of Conservation Biology and Forest Ecology, Biocenter, University of Würzburg, Glashüttenstraße 5, Rauhenebrach D-96181, GermanyiES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Fortstraße 7, Landau D-76829, GermanyiES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Fortstraße 7, Landau D-76829, GermanyiES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Fortstraße 7, Landau D-76829, Germany; Eußerthal Ecosystem Research Station (EERES), RPTU Kaiserslautern-Landau, Birkenthalstraße 13, Eußerthal D-76857, GermanyiES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Fortstraße 7, Landau D-76829, Germany; Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Lennart Hjelms väg 9, Uppsala SWE-75007, SwedeniES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Fortstraße 7, Landau D-76829, Germany; Eußerthal Ecosystem Research Station (EERES), RPTU Kaiserslautern-Landau, Birkenthalstraße 13, Eußerthal D-76857, GermanyEcosystems face multiple abiotic and biotic stressors that interact and extend beyond ecosystem boundaries. Both artificial light at night (ALAN) and invasive species are major threats to freshwater biodiversity in Europe. We used a riparian stream mesocosm facility, with 16 replicated units each containing an artificial flume and adjacent terrestrial habitat, to investigate the effects of ALAN, the invasive signal crayfish Pacifastacus leniusculus and their interaction. We specifically addressed their impact on aquatic insect emergence and the potential bottom-up control of riparian spiders. As expected, crayfish reduced insect emergence by 35 % after one-week, while ALAN had no significant effect. Moreover, spider numbers, particularly of riparian Tetragnathidae Pachygnatha degeeri and Tetragnatha extensa, correlated positively with insect emergence, indicating indirect negative effects of the crayfish. During the first week of our experiment, spider numbers increased by 22 % in pitfall traps exposed to ALAN, but decreased by 25 % in suction samples. This difference is likely driven by differences in species composition between the two sampling methods. All in all, the direction and strength of crayfish and ALAN effects were taxon- and time-dependent. This study provides evidence that the impact of signal crayfish can extend beyond aquatic systems and suggests that the effects of crayfish invasion and ALAN are largely independent.http://www.sciencedirect.com/science/article/pii/S2351989425001787Light pollutionInvasive speciesAquatic-terrestrial linkageInsectsAquatic subsidiesFood webs |
| spellingShingle | Alessandro Manfrin Jens Schirmel Marina Arias Martin H. Entling Julian Hoffmann Maike Huszarik Sebastian Kolb Anne Schrimpf Thomas Schmidt Mirco Bundschuh Ralf Schulz Cross-ecosystem effects of light pollution and invasive signal crayfish on riparian spiders Global Ecology and Conservation Light pollution Invasive species Aquatic-terrestrial linkage Insects Aquatic subsidies Food webs |
| title | Cross-ecosystem effects of light pollution and invasive signal crayfish on riparian spiders |
| title_full | Cross-ecosystem effects of light pollution and invasive signal crayfish on riparian spiders |
| title_fullStr | Cross-ecosystem effects of light pollution and invasive signal crayfish on riparian spiders |
| title_full_unstemmed | Cross-ecosystem effects of light pollution and invasive signal crayfish on riparian spiders |
| title_short | Cross-ecosystem effects of light pollution and invasive signal crayfish on riparian spiders |
| title_sort | cross ecosystem effects of light pollution and invasive signal crayfish on riparian spiders |
| topic | Light pollution Invasive species Aquatic-terrestrial linkage Insects Aquatic subsidies Food webs |
| url | http://www.sciencedirect.com/science/article/pii/S2351989425001787 |
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