Hydrological fluctuations determine predator–prey interactions in a semi-arid non-perennial river.
Saved in:
| Title: | Hydrological fluctuations determine predator–prey interactions in a semi-arid non-perennial river. |
|---|---|
| Authors: | Gonçalves-Silva, Milena1,2 (AUTHOR) milenagoncalves.bio@gmail.com, D'Bastiani, Elvira3 (AUTHOR), Datry, Thibault2 (AUTHOR), Rezende, Carla Ferreira1 (AUTHOR) |
| Source: | Hydrobiologia. Feb2026, Vol. 853 Issue 3, p817-834. 18p. |
| Subjects: | Hydrologic cycle, Ephemeral streams, Ecosystem dynamics, Predation, Ecological heterogeneity, Biodiversity, Aquatic habitats |
| Abstract: | Predator–prey interactions in highly dynamic ecosystems such as non-perennial rivers and streams (NPRs) are relevant to understanding the effects of fragmentation and reshaping of aquatic habitat structure in interspecific relationships. In this context, our study offers a temporal snapshot of predator–prey interaction dynamics across different hydrological phases in an NPR. We sampled along 1.15 km of the NPR during flowing (23 sections) and dry (22 isolated pools) phases, identifying 18 fish species (predators) and 11 prey categories. Predator composition and abundance shifted between phases, with higher abundance during the flowing phase and increased environmental heterogeneity among isolated pools in the dry phase. The predator–prey interaction network exhibited a nested pattern, indicating hierarchical organisation where generalist and specialist predators coexist. In the dry phase, interaction patterns across isolated pools varied, including nested, modular, specialised, and/or random structures. Stochastic processes appear to shape interaction networks during the dry phase, as variation in species composition across isolated pools was not explained by predator richness. Our study shows that shifts in hydrological phases restructure predator–prey networks in NPRs. Given increasing climatic and human pressures on flow regimes, conserving natural hydrological variability is important to support biodiversity and ecosystem functioning in these ecosystems. [ABSTRACT FROM AUTHOR] |
| Copyright of Hydrobiologia is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 190887919 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Hydrological fluctuations determine predator–prey interactions in a semi-arid non-perennial river. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Gonçalves-Silva%2C+Milena%22">Gonçalves-Silva, Milena</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> milenagoncalves.bio@gmail.com</i><br /><searchLink fieldCode="AR" term="%22D'Bastiani%2C+Elvira%22">D'Bastiani, Elvira</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Datry%2C+Thibault%22">Datry, Thibault</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rezende%2C+Carla+Ferreira%22">Rezende, Carla Ferreira</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Hydrobiologia%22">Hydrobiologia</searchLink>. Feb2026, Vol. 853 Issue 3, p817-834. 18p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Hydrologic+cycle%22">Hydrologic cycle</searchLink><br /><searchLink fieldCode="DE" term="%22Ephemeral+streams%22">Ephemeral streams</searchLink><br /><searchLink fieldCode="DE" term="%22Ecosystem+dynamics%22">Ecosystem dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Predation%22">Predation</searchLink><br /><searchLink fieldCode="DE" term="%22Ecological+heterogeneity%22">Ecological heterogeneity</searchLink><br /><searchLink fieldCode="DE" term="%22Biodiversity%22">Biodiversity</searchLink><br /><searchLink fieldCode="DE" term="%22Aquatic+habitats%22">Aquatic habitats</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Predator–prey interactions in highly dynamic ecosystems such as non-perennial rivers and streams (NPRs) are relevant to understanding the effects of fragmentation and reshaping of aquatic habitat structure in interspecific relationships. In this context, our study offers a temporal snapshot of predator–prey interaction dynamics across different hydrological phases in an NPR. We sampled along 1.15 km of the NPR during flowing (23 sections) and dry (22 isolated pools) phases, identifying 18 fish species (predators) and 11 prey categories. Predator composition and abundance shifted between phases, with higher abundance during the flowing phase and increased environmental heterogeneity among isolated pools in the dry phase. The predator–prey interaction network exhibited a nested pattern, indicating hierarchical organisation where generalist and specialist predators coexist. In the dry phase, interaction patterns across isolated pools varied, including nested, modular, specialised, and/or random structures. Stochastic processes appear to shape interaction networks during the dry phase, as variation in species composition across isolated pools was not explained by predator richness. Our study shows that shifts in hydrological phases restructure predator–prey networks in NPRs. Given increasing climatic and human pressures on flow regimes, conserving natural hydrological variability is important to support biodiversity and ecosystem functioning in these ecosystems. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Hydrobiologia is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=190887919 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s10750-025-05968-1 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 817 Subjects: – SubjectFull: Hydrologic cycle Type: general – SubjectFull: Ephemeral streams Type: general – SubjectFull: Ecosystem dynamics Type: general – SubjectFull: Predation Type: general – SubjectFull: Ecological heterogeneity Type: general – SubjectFull: Biodiversity Type: general – SubjectFull: Aquatic habitats Type: general Titles: – TitleFull: Hydrological fluctuations determine predator–prey interactions in a semi-arid non-perennial river. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Gonçalves-Silva, Milena – PersonEntity: Name: NameFull: D'Bastiani, Elvira – PersonEntity: Name: NameFull: Datry, Thibault – PersonEntity: Name: NameFull: Rezende, Carla Ferreira IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 02 Text: Feb2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 00188158 Numbering: – Type: volume Value: 853 – Type: issue Value: 3 Titles: – TitleFull: Hydrobiologia Type: main |
| ResultId | 1 |
