Invasive Species in Freshwater Ecosystems in the Americas

A Special Issue of Diversity (ISSN 1424-2818) belonging to the section "Freshwater Biodiversity".

Deadline for manuscript submissions: 31 October 2026 | Viewed by 4056

Editors


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Guest Editor
Laboratorio de Zoología Acuática, División de Investigación y Posgrado, Universidad Nacional Autónoma de México, Campus Iztacala, Av. de los Barrios # 1, Los Reyes Iztacala, Tlalnepantla CP 54090, Estado de México, Mexico
Interests: lake management; control of toxic cyanobacteria; fish larvae-zooplankton interactions; aquaculture
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Facultad de Estudios Superiores Iztacala, Tlalnepantla, Mexico
Interests: aquatic science; population ecology; rotifers; life expectancy; population growth; zooplankton; Microcystis

Special Issue Information

Dear Colleagues,

Freshwater ecosystems in the Americas are under increasing pressure from invasive species, which threaten native biodiversity, alter ecosystem functioning, and pose significant challenges for conservation. From the spread of invertebrates including zebra mussels in North American lakes to the proliferation of invasive fish like Tilapia and common carp in South American rivers, the biological invasions modify aquatic habitats in complex and often unpredictable ways.

This Special Issue explores the ecological impacts, management strategies, and socio-economic dimensions of invasive species in freshwater environments across the Americas. We invite research works on the following themes:

  • Invasion pathways—How do non-native species establish themselves to spread?
  • Ecological consequences—What are the long-term effects on native species and food webs?
  • Human dimensions—How do invasive species affect fisheries, water quality, and local communities?
  • Innovative solutions—Can biocontrol, policy changes, or community engagement prevent or mitigate invasions?

By bringing together case studies, reviews, and multidisciplinary perspectives, this collection aims to advance our understanding of freshwater invasions and support evidence-based conservation. We invite submissions that highlight both challenges and solutions—because protecting these vital ecosystems requires science, collaboration, and action.

Prof. Dr. Sarma Nandini
Prof. Dr. S.S.S. Sarma
Guest Editors

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Keywords

  • freshwater invasive species
  • aquatic biodiversity in the Americas
  • invasion ecology
  • biosecurity management
  • socio-ecological impacts

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Published Papers (1 paper)

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Research

18 pages, 5294 KB  
Article
Reproductive and Trophic Patterns Associated with Non-Native Fish Dominance in a Mexican Spring Ecosystem
by Arely Ramírez-García, Enid Michelle Escamilla-Espejo, Fhernando Salvador Jacobo-Cabrera, Paola Pedroza-Vargas, Andrea Pérez-Pérez, Alejandro Díaz-Flores, Juan Francisco Cardenas-Menera, Michael Köck and Omar Domínguez-Domínguez
Diversity 2026, 18(5), 311; https://doi.org/10.3390/d18050311 - 21 May 2026
Cited by 1 | Viewed by 3549
Abstract
Biological invasions are among the main threats to freshwater biodiversity, yet ecological patterns associated with assemblage structure and high relative abundances of non-native fishes in spring ecosystems remain insufficiently documented. We evaluated seasonal variation in community composition, reproductive traits, and trophic interactions in [...] Read more.
Biological invasions are among the main threats to freshwater biodiversity, yet ecological patterns associated with assemblage structure and high relative abundances of non-native fishes in spring ecosystems remain insufficiently documented. We evaluated seasonal variation in community composition, reproductive traits, and trophic interactions in La Zarcita springs, part of the Natural Protected Area Laguna de Zacapu, central Mexico. Bimonthly sampling was conducted, including stomach content analysis and reproductive trait assessment. A total of 14 fish taxa were recorded (seven native and seven non-native), with the assemblage numerically dominated by Oreochromis niloticus (30%), Pseudoxiphophorus bimaculatus (24%), and Xiphophorus hellerii (14%). Overall diet composition did not differ significantly between taxa classified as native and non-native (PERMANOVA, p > 0.05), consistent with overlap in resource use within the assemblage. Exploratory assemblage-level analyses detected differences in omnivory index values among taxa grouped according to species origin (LMM, p < 0.05). Reproductive analyses detected variation in fertility values (GLMM, p < 0.05), reproductive activity (Wilcoxon test, p < 0.05), gonadosomatic index values, and Fulton’s condition factor values (LMM, p < 0.01) among taxa within the assemblage. Physicochemical variables varied seasonally but were not significantly associated with trophic composition, condition factor values, or reproductive traits in the statistical analyses performed. Overall, the results document variation in reproductive characteristics and trophic patterns among taxa within this urbanized spring system and highlight the value of assemblage-level ecological studies for understanding fish community structure in small freshwater habitats. Full article
(This article belongs to the Special Issue Invasive Species in Freshwater Ecosystems in the Americas)
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