Repository logo
 
Publication

Historical food-web changes in invaded fish communities in the lower Guadiana basin

2022-06-01Conference object Open access
Simple item page
dc.contributor.authorGkenas, Christos
dc.contributor.authorMartelo, Joana
dc.contributor.authorCucherousset, Julien
dc.contributor.authorRibeiro, Filipe
dc.contributor.authorGago, João
dc.contributor.authorAlves, Maria Judite
dc.contributor.authorRibeiro, Diogo
dc.contributor.authorCheoo, Gisela
dc.contributor.authorMagalhães, M. F.
dc.date.accessioned2023-01-31T14:38:13Z
dc.date.available2023-01-31T14:38:13Z
dc.date.issued2022-06-01
dc.description.abstractFreshwater ecosystems are increasingly being reshaped by biological invasions, leading to biotic homogenization and biodiversity loss. However, the extent to which novel species may drive changes in food-web structure over time remains poorly understood. Clarifying changes in historical ecological processes is critical to inform conservation and restoration efforts in recipient ecosystems. Here, we address food-web changes associated with fish invasions in the Lower Guadiana Basin (LGB) over the past 40 years, by contrasting feeding relationships between museum-archived and contemporary specimens, using stable carbon (δ13C) and nitrogen (δ15N) ratios. Specifically, trophic niches of museum-archived fishes sampled throughout 1978–1987 and 1999–2004 corresponding to the initial establishment and spread of non-native fishes, respectively, were compared with those of fishes sampled in 2019, characterizing the integration of non-native species in the recipient ecosystem. We focused on five native species (Anaecypris hispanica, Cobitis paludica, Iberochondrostoma lemmingii, Squalius pyrenaicus and Squalius alburnoides) and four non-native species (Lepomis gibbosus, Australo heros facetus, Micropterus salmoides and Gambusia holbrooki) with potential to cover multiple trophic positions in the food-webs. We approached historical baseline resources using prey items in gut con tents of the museum-archived fishes and characterized primary producers and macroinvertebrates in 2019. Prior to analysis, samples were normalized for high lipid content and corrected for preservation. We found considerable asymmetries in niche partitioning among species as invasion progressed. Over time, native species tended to be displaced to lower trophic levels, while non-native species showed significantly higher trophic niches, driven mainly by increases in trophic (δ15N) range. Our study highlights that stable isotopes may provide important insights on historical food-web structure and particularly on processes underpinning ecological changes associated with anthropogenetic pressures on freshwater ecosystems.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGkenas, C.; Martelo, J.; Cucherousset, J.; Ribeiro, F.; Gago, J.; Alves, M.J.; Ribeiro, D.; Cheoo, G.; Magalhães, M.F. (2022). Historical food-web changes in invaded fish communities in the lower Guadiana basin. Biology and Life Sciences Forum, 13 (1): 2. https://doi.org/10.3390/blsf2022013002pt_PT
dc.identifier.doihttps://doi.org/10.3390/blsf2022013002pt_PT
dc.identifier.eissn2673-9976
dc.identifier.urihttp://hdl.handle.net/10400.15/4281
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationProject Lisboa 2020—Programa Operacional Regional de Lisboa - LISBOA- 01-0145-FEDER-029105 - FEDERpt_PT
dc.relationProject PTDC/CTA-AMB/29105/2017 - FCTpt_PT
dc.relation.publisherversionhttps://www.mdpi.com/2673-9976/13/1/2pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectFood-webspt_PT
dc.subjectStable isotopespt_PT
dc.subjectMuseum specimenspt_PT
dc.subjectTrophic nichept_PT
dc.subjectNon-native speciespt_PT
dc.titleHistorical food-web changes in invaded fish communities in the lower Guadiana basinpt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlacePortopt_PT
oaire.citation.issue1pt_PT
oaire.citation.titleThe IX Iberian Congress of Ichthyologypt_PT
oaire.citation.volume13pt_PT
person.familyNameAndré Evaristo de Matos Gago
person.givenNameJoão
person.identifier.ciencia-idB013-AE6E-192F
person.identifier.orcid0000-0003-3893-5920
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublication406ec75e-4f7c-4086-8c18-2e47234287b9
relation.isAuthorOfPublication.latestForDiscovery406ec75e-4f7c-4086-8c18-2e47234287b9

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
blsf-13-00002-with-cover.pdf
Size:
259.73 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Publicações de encontros científicos_ESAS