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Article
Environmental Sciences
Rosetta C. Blackman et al.
Summary: Regular monitoring of ecosystems is important for the early detection and management of invasive alien species (IAS). Current monitoring methods for freshwater IAS can be costly and time-consuming. This study compares the effectiveness of environmental DNA (eDNA) metabarcoding and traditional kick-net sampling for monitoring freshwater macroinvertebrate IAS. Both methods have their strengths, with kick-net sampling being more successful for detecting well-known target IAS, while eDNA samples are complementary for detecting unnoticed IAS. The study shows that eDNA is easily implemented in national- and catchment-scale monitoring, but success is dependent on primer choice, species biology, and available markers.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Neil E. Coughlan et al.
Summary: Invasive aquatic macrophytes can reproduce and spread through fragmentary propagules, with fragment size affecting their regrowth and dispersal ability. Apical fragments tend to resume growth more readily than mid-stem sections, but viability does not scale linearly with increasing fragment size. Longer fragments generally produce more shoots and roots, but root production varies among species. These findings have important implications for understanding the dispersal and management of invasive species, suggesting that current control strategies may need to be improved.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Fhatuwani Makherana et al.
Summary: This study conducted an ecological assessment of the invasive alien snail Tarebia granifera at seven sites around Nandoni Reservoir in South Africa, and explored the potential drivers of its population structure. The study found that T. granifera was widespread in sites impacted by human activity, with the highest densities in the most impacted areas and during the summer season. Sediment parameters and water chemistry were found to be important in structuring T. granifera populations. These findings provide important information for the development of management plans for invasive alien snails and predictions of invasion patterns in other regions based on environmental characteristics.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Robert P. Creed et al.
Summary: The dilution effect describes the negative impact of increased host diversity on parasite or pathogen abundance. This effect can occur in many mutualisms if dispersing symbionts encounter noncompetent hosts. The introduction of non-native crayfish may disrupt native crayfish-symbiont systems, leading to a decline in native symbiont abundance.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Gaute Kjaerstad et al.
Summary: The study conducted over five years in a Norwegian watercourse showed only relatively minor short-term effects of the piscicide rotenone on benthic invertebrates, but severe effects on lotic fauna after long-term low-dose exposure. This highlights the importance of long-term monitoring and minimizing exposure time.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Leonidas Vardakas et al.
Summary: Despite extensive research on the ecological impacts of invasive alien species (IAS), their social aspects in freshwater ecosystems have received little attention. This study used a questionnaire survey to assess the perceptions of environmental professionals and non-professionals towards non-indigenous freshwater fish species (NIFS) in a Mediterranean country with high levels of fish species endemism. The majority of respondents considered NIFS to be a threat of national importance, although they ranked it as the least important threat compared to other pressures.
ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Jose Maria Santos et al.
Summary: This study documents the passage of red swamp crayfish through a fish lift, highlighting the importance of considering invasive crayfish species while planning future fishways and the need for continuous monitoring of such facilities to detect the passage of non-native invasive species. Despite the small sample size, the study demonstrates the potential impact of fishways on the dispersal of invasive species.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Jorge Salgado et al.
Summary: The study found that in eutrophic-isolated lakes, the abundance of Elodea canadensis was correlated with water clarity, plant diversity, and plant cover; while in lakes with different levels of connectivity, the abundance of E. canadensis was most strongly related to beta diversity of macrophytes.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Courtney E. Larson et al.
Summary: The study analyzed the population structure and predicted the range expansion of signal crayfish in Northwestern Italy. Results suggest that the species may completely invade the Erro Stream network in 30-40 years, without additional introductions, highlighting the importance of preventing the spread of invasive species.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Sergio Bedmar et al.
Summary: River damming has profound effects on aquatic biodiversity and trophic ecology, promoting biological invasions and altering the diet composition of otters. These effects become more pronounced in the long term.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Lerato T. Maimela et al.
Summary: Rainbow trout has been widely introduced into lakes and rivers in South Africa for sport-fishing purposes. This study assessed the spread debt of rainbow trout in Mpumalanga Province, South Africa, and identified areas with known introductions, the extent of invasion, and potential invasion-free areas. The study demonstrates the challenges of quantifying future invasions and highlights the importance of the invasion debt concept in invasion biology, management, and policy.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Simone Guareschi et al.
Summary: Riverine communities have experienced numerous biological invasions, with crustaceans being a highly successful group. Understanding the factors that make a river system prone to invasion is important for environmental regulators, resource managers, scientists, and society. This study used contemporary distribution data to examine the impact of the invasive species D. haemobaphes on faunal community patterns. It identified characteristics that may help identify sites at risk of future invasion and questioned classic biological invasion hypotheses.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Rossano Bolpagni et al.
Summary: Overexploitation of water, loss of dynamism and climate change are causing increasingly intense and prolonged river drought and baseflow events worldwide, which strongly impacts riverine plant communities. However, data on this key component of river biodiversity are limited, and the role of alien species in riverbeds is expected to be significant.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Antonin Kouba et al.
Summary: Invasive crustaceans, particularly crayfish and crabs, have resulted in increasing economic costs over time, with Europe and North America being major contributors. Main issues include lack of management costs reporting, dominance of damage-related costs, and insufficient data.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Daniel D. Magoulick et al.
Summary: Biological invasions have significant environmental and economic impacts, posing a serious threat to global biodiversity. Invasive crayfish species, including F. neglectus chaenodactylus and some populations of F. neglectus neglectus, have larger chelae sizes, potentially indicating pre-adaptation to the role of invader.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Harry Sanders et al.
Summary: The predatory impacts of invasive crayfish on native and invasive bivalve populations were studied in mesocosm predation choice experiments. The results showed that all bivalves were actively preyed upon, but there was no consistent difference in the biomass of invasive versus native bivalves consumed. However, the effects of consumption were consistently different, with invasive bivalves being more resistant to predation and native bivalves receiving nonlethal damage.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Rinku Singh et al.
Summary: This study assessed people's perceptions of invasive alien plants (IAPs) in the riparian zone of the Ganga River in Varanasi, India. The results showed that residents were aware of IAPs and perceived them both positively and negatively. Socio-demographic factors such as age and education influenced people's perceptions of IAPs. Fire was commonly used as a management practice for IAPs.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Kate L. Mathers et al.
Summary: It has been traditionally believed that abiotic forces dominate the dynamics of fluvial sediment. However, recent studies suggest that biological energy also plays a significant role. In this study, the researchers investigated the impact of invasive signal crayfish on the transport and storage of fine sediment in a river. The study found clear evidence of diurnal fluctuations in turbidity associated with crayfish presence and an increase in fine sediment loadings. These findings highlight the importance of considering biological energy in sediment dynamic models.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Marine & Freshwater Biology
Daniel Simberloff
Summary: Efforts to manage freshwater invasions have seen both successes and failures, with some invasive species being effectively controlled while others prove challenging. In contrast, marine invasions have proven more difficult to manage, with only a few eradication successes and no long-term management strategies established. The rapid development of genetic technologies may provide new opportunities for controlling both terrestrial and aquatic invaders.
Article
Biodiversity Conservation
Hanno Seebens et al.
Summary: The study used a new model to simulate future numbers of alien species and projected a 36% increase in established alien species numbers per continent from 2005 to 2050. Particularly strong increases were projected for Europe, followed by North America, South America, and Asia, while a decline in growth rate was projected for Australasia.
GLOBAL CHANGE BIOLOGY
(2021)
Article
Biodiversity Conservation
Simone Guareschi et al.
Summary: This study explores the response of freshwater macroinvertebrate communities to biological invasion by examining the performance of biomonitoring tools and community functional indices before and after the colonization of the invasive species Dikerogammarus haemobaphes. Results show that the invasion by D. haemobaphes significantly reduces WHPT index and functional diversity metrics, suggesting it should be considered a significant pressure to riverine communities. The research highlights the importance of using community functional measures in characterizing the effects of invasive species and the need to consider the broader threats they pose to freshwater ecosystems.
JOURNAL OF APPLIED ECOLOGY
(2021)
Article
Environmental Sciences
Ross N. Cuthbert et al.
Summary: Research indicates that the global economic cost of aquatic invasive alien species has reached $345 billion, with the majority attributed to invertebrates, vertebrates, and plants. The highest costs were reported in North America and Asia, primarily due to resource damages. The costs of aquatic invasive species have increased exponentially in recent decades, but are likely underreported.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Ecology
Peter E. Jones et al.
Summary: Aquatic invasive species pose a significant threat to freshwater biodiversity, leading to the increased use of exclusion barriers as a management strategy. However, the effectiveness of these barriers is context dependent and can impact native organisms. Global studies show that barriers have been successful in limiting the passage of AIS, but more research is needed to understand their long-term impacts on native species and to improve their effectiveness as a management tool.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2021)
Letter
Biodiversity Conservation
Ana Novoa et al.
Article
Biodiversity Conservation
E. R. C. Smith et al.
BIOLOGICAL INVASIONS
(2020)
Review
Ecology
Eric R. Larson et al.
FRONTIERS IN ECOLOGY AND THE ENVIRONMENT
(2020)
Article
Ecology
Daniel S. Chapman et al.
GLOBAL ECOLOGY AND BIOGEOGRAPHY
(2020)
Article
Biodiversity Conservation
Kate L. Mathers et al.
JOURNAL OF APPLIED ECOLOGY
(2020)
Article
Biology
Petr Pysek et al.
BIOLOGICAL REVIEWS
(2020)
Article
Ecology
Kate L. Mathers et al.
FUNCTIONAL ECOLOGY
(2020)
Article
Ecology
Luca Carraro et al.
ECOLOGY AND EVOLUTION
(2020)
Article
Environmental Sciences
Ross T. Shackleton et al.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2019)
Article
Environmental Sciences
Simone Guareschi et al.
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Biodiversity Conservation
Alec P. Christie et al.
JOURNAL OF APPLIED ECOLOGY
(2019)
Article
Fisheries
Mark A. Kirk et al.
TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY
(2018)
Article
Multidisciplinary Sciences
Hanno Seebens et al.
NATURE COMMUNICATIONS
(2017)
Article
Biodiversity Conservation
Olaf Booy et al.
BIOLOGICAL INVASIONS
(2017)
Article
Ecology
Rosetta C. Blackman et al.
Article
Biodiversity Conservation
Mathieu Rouget et al.
DIVERSITY AND DISTRIBUTIONS
(2016)
Article
Marine & Freshwater Biology
John E. Havel et al.
Article
Biodiversity Conservation
Matthew P. J. Oreska et al.
BIOLOGICAL INVASIONS
(2011)
Article
Biodiversity Conservation
Jane A. Catford et al.
JOURNAL OF APPLIED ECOLOGY
(2011)
Article
Biodiversity Conservation
Ingolf Kühn et al.
Article
Biodiversity Conservation
Kurt D. Fausch et al.
CONSERVATION BIOLOGY
(2009)
