High predatory efficiency and abundance drive expected ecological impacts of a marine invasive fish

2020 ◽  
Vol 637 ◽  
pp. 195-208 ◽  
Author(s):  
EM DeRoy ◽  
R Scott ◽  
NE Hussey ◽  
HJ MacIsaac
Keyword(s):  
Invasive Species ◽  
Native Species ◽  
Ecological Impact ◽  
Marine Species ◽  
Ecological Impacts ◽  
Negative Effects ◽  
Marine Predator ◽  
Eastern Gulf Of Mexico ◽  
Red Grouper ◽  
Per Capita

The ecological impacts of invasive species are highly variable and mediated by many factors, including both habitat and population abundance. Lionfish Pterois volitans are an invasive marine species which have high reported detrimental effects on prey populations, but whose effects relative to native predators are currently unknown for the recently colonized eastern Gulf of Mexico. We used functional response (FR) methodology to assess the ecological impact of lionfish relative to 2 functionally similar native species (red grouper Epinephelus morio and graysby grouper Cephalopholis cruentata) foraging in a heterogeneous environment. We then combined the per capita impact of each species with their field abundance to obtain a Relative Impact Potential (RIP). RIP assesses the broader ecological impact of invasive relative to native predators, the magnitude of which predicts community-level negative effects of invasive species. Lionfish FR and overall consumption rate was intermediate to that of red grouper (higher) and graysby grouper (lower). However, lionfish had the highest capture efficiency of all species, which was invariant of habitat. Much higher field abundance of lionfish resulted in high RIPs relative to both grouper species, demonstrating that the ecological impact of lionfish in this region will be driven mainly by high abundance and high predator efficiency rather than per capita effect. Our comparative study is the first empirical assessment of lionfish per capita impact and RIP in this region and is one of few such studies to quantify the FR of a marine predator.

scholarly journals The pig of the Lençóis Maranhenses, first record of wild boar (Sus scrofa) in Maranhão State, Brazil

Check List ◽  
2019 ◽  
Vol 15 (4) ◽  
pp. 1-1
Author(s):  
Gilberto Nepomuceno Salvador ◽  
Nathali Garcia Ristau ◽  
Isabel Sanches da Silva ◽  
André Nunes
Keyword(s):  
Invasive Species ◽  
Wild Boar ◽  
Sus Scrofa ◽  
Native Species ◽  
National Park ◽  
First Record ◽  
Negative Effects ◽  
The World

The wild boar is one of the most dangerous invasive species. It is widespread in the world, including records for many Brazilian states. However, there is a lack of record from Maranhão state. In the present study, we reported a population of wild boar inside the Lençóis Maranhenses National Park, in Barrerinhas county, State of Maranhão. We discuss about the negative effects of this introduction on native species, including a record of predation by wild boar in nests of endangered turtles.

scholarly journals Animal personality and the ecological impacts of freshwater non-native species

2014 ◽  
Vol 60 (3) ◽  
pp. 417-427 ◽  
Author(s):  
Tristan Juette ◽  
Julien Cucherousset ◽  
Julien Cote
Keyword(s):  
Invasive Species ◽  
Native Species ◽  
Life History Traits ◽  
Animal Personality ◽  
Freshwater Ecosystems ◽  
Personality Types ◽  
Ecological Impacts ◽  
Individual Level ◽  
The Individual ◽  
Taxonomic Groups

Abstract While the ecological impacts of invasive species have been demonstrated for many taxonomic groups, the potential effects of behavioural variation among non-native individuals (i.e. personality) on these impacts have been largely overlooked. This is despite the fact that recent studies have demonstrated that, by nature, the three first stages of biological invasions (i.e. transport, establishment and spread) can lead to personality-biased populations. Freshwater ecosystems provide a unique opportunity to investigate this issue, notably because the ecological impacts of non-native species have been extensively documented and because animal personality has been widely studied using freshwater model species. Here, we aim at developing some perspectives on the potential effects of animal personality on the ecological impacts of freshwater non-native species across levels of biological organizations. At the individual level, personality types have been demonstrated to affect the physiolo- gy, metabolism, life history traits and fitness of individuals. We used these effects to discuss how they could subsequently impact invaded populations and, in turn, recipient communities. We also discussed how these might translate into changes in the structure of food webs and the functioning of invaded ecosystems. Finally we discussed how these perspectives could interact with the management of invasive species.

scholarly journals The Invasive New Zealand Mudsnail, Potamopyrgus Antipodarum, Reduces Growth of the Native Snail, Fossaria SP.

2005 ◽  
Vol 29 ◽  
pp. 42-48
Author(s):  
Amy Krist ◽  
Mark Dybdahl
Keyword(s):  
Invasive Species ◽  
New Zealand ◽  
Biological Invasions ◽  
Native Species ◽  
Rapid Evolution ◽  
Potamopyrgus Antipodarum ◽  
Ecological Impacts ◽  
Or Gene ◽  
New Zealand Mud Snail ◽  
The Impact

Invasive species are one of the greatest threats to global biodiversity. Hence, understanding the role of invasive species is of grave importance to managing and minimizing the impact of biological invasions. To date, the ecological impacts of biological invasions have received significant attention, but little effort has been made to address the evolutionary impact (Sakai et al. 2001, Cox 2004). This is despite the fact that evolutionary impacts are likely to be widespread; invasive species have been shown to alter patterns of natural selection or gene flow within native populations (Parker et al. 1999), and many of the best examples of rapid evolution involve invasive species interacting with native species (Reznick and Ghalambor 2001, Strauss et al. 2006). We have begun to address some of the evolutionary consequences of the invasion of the New Zealand mud snail, (Potamopyrgus antipodarum) on a species of native snail in the Greater Yellowstone Area (GYA).

scholarly journals Environmental Aspects of Cooperation in Atomic Industry at the Post-Soviet Space

2019 ◽  
Vol 12 (5) ◽  
pp. 82-89
Author(s):  
E. L. Moreva
Keyword(s):  
Negative Impact ◽  
Technological Development ◽  
Ecological Impact ◽  
National Level ◽  
Ecological Impacts ◽  
Negative Effects ◽  
Vital Functions ◽  
Soviet Space ◽  
Institutional Construction ◽  
Post Soviet Space

The importance of the research lies in crucial significance of atomic industry ecological effects for people vital functions that can greatly restrict the sector’s development. Overcoming unfavorable atomic industry environmental impact is often seen in a way of technical technological development when it is possible to prevent, mitigate and/or neutralize the negative effects from its operating. But this is just part of the solution. The subject of this research addresses the ecological impact of atomic operations on the economic activity of the atomic industry enterprises in the post-soviet space and on the ways of optimizing their productive institutional construction at different levels of trans-border regions.The purpose of the work is to define the meaning of negative impact anticipating for the growth and development of the atomic industry while implementing innovative projects of local / national levels; participating in international competition and interaction for integration on the post-soviet space.It is concluded that inventory-making has crucial importance for atomic industry development. At the local/national level within two-side contacts it is expressed in stimulating the subjects of the industry to transform and perfect by national stakeholders and foreign competitors. At the level of trans-border connections such influence has not become the basis for productive integration interaction and atomic complex development because of the specificity of their subjects’ interests. The adequate inventory-making in institutional construction could allow using the possible ecological impacts of atomic production for their development and consolidating as a driver of social economic development at the postsoviet space.

scholarly journals Ship traffic connects Antarctica’s fragile coasts to worldwide ecosystems

2022 ◽  
Vol 119 (3) ◽  
pp. e2110303118
Author(s):  
Arlie H. McCarthy ◽  
Lloyd S. Peck ◽  
David C. Aldridge
Keyword(s):  
Invasive Species ◽  
Marine Species ◽  
South Shetland Islands ◽  
Spatially Explicit ◽  
Negative Effects ◽  
Ship Traffic ◽  
Shetland Islands ◽  
Antarctic Waters ◽  
Gateway Cities ◽  
The Antarctic

Antarctica, an isolated and long considered pristine wilderness, is becoming increasingly exposed to the negative effects of ship-borne human activity, and especially the introduction of invasive species. Here, we provide a comprehensive quantitative analysis of ship movements into Antarctic waters and a spatially explicit assessment of introduction risk for nonnative marine species in all Antarctic waters. We show that vessels traverse Antarctica’s isolating natural barriers, connecting it directly via an extensive network of ship activity to all global regions, especially South Atlantic and European ports. Ship visits are more than seven times higher to the Antarctic Peninsula (especially east of Anvers Island) and the South Shetland Islands than elsewhere around Antarctica, together accounting for 88% of visits to Southern Ocean ecoregions. Contrary to expectations, we show that while the five recognized “Antarctic Gateway cities” are important last ports of call, especially for research and tourism vessels, an additional 53 ports had vessels directly departing to Antarctica from 2014 to 2018. We identify ports outside Antarctica where biosecurity interventions could be most effectively implemented and the most vulnerable Antarctic locations where monitoring programs for high-risk invaders should be established.

scholarly journals Comparative feeding behaviour of native and introduced terrestrial snails tracks their ecological impacts

NeoBiota ◽  
2019 ◽  
Vol 47 ◽  
pp. 81-94 ◽  
Author(s):  
Tedi Hoxha ◽  
Steve Crookes ◽  
Ian MacIsaac ◽  
Xuexiu Chang ◽  
Mattias Johansson ◽  
...  
Keyword(s):  
Functional Response ◽  
Feeding Behaviour ◽  
Native Species ◽  
Ecological Impact ◽  
Land Snails ◽  
Ecological Impacts ◽  
Food Type ◽  
Indigenous Species ◽  
Competitive Abilities ◽  
Non Indigenous Species

A developing body of theory and empirical evidence suggest that feeding behaviour as measured by the functional response (FR) can assist researchers in assessing the relative potential, ecological impacts and competitive abilities of native and introduced species. Here, we explored the FRs of two land snails that occur in south-western Ontario, one native (Mesodonthyroidus) and one non-indigenous (Cepaeanemoralis) to Canada. The non-indigenous species appears to have low ecological impact and inferior competitive abilities. Consistent with theory, while both species conformed to Type II functional responses, the native species had a significantly higher attack rate (5.30 vs 0.41, respectively) and slightly lower handling time (0.020 vs 0.023), and hence a higher maximum feeding rate (50.0 vs 43.5). The non-indigenous species exhibited a significantly longer time to contact for a variety of food types, and appeared less discriminating of paper that was offered as a non-food type. The non-indigenous species also ate significantly less food when in mixed species trials with the native snail. These feeding patterns match the known low ecological impact of the introduced snail and are consistent with the view that it is an inferior competitor relative to the native species. However, field experimentation is required to clarify whether the largely microallopatric distributions of the two species in south-western Ontario reflect competitive dominance by the native species or other factors such as habitat preference, feeding preferences or predator avoidance. The relative patterns of feeding behaviour and ecological impact are, however, fully in line with recent functional response theory and application.

scholarly journals Exploiting intraspecific competitive mechanisms to control invasive cane toads ( Rhinella marina )

2012 ◽  
Vol 279 (1742) ◽  
pp. 3436-3442 ◽  
Author(s):  
Michael R. Crossland ◽  
Takashi Haramura ◽  
Angela A. Salim ◽  
Robert J. Capon ◽  
Richard Shine
Keyword(s):  
Invasive Species ◽  
Communication Systems ◽  
Native Species ◽  
Negative Effects ◽  
Specific Chemical ◽  
Rhinella Marina ◽  
Invasive Species Control ◽  
Tropical Australia ◽  
Competitive Mechanisms ◽  
Species Specific

If invasive species use chemical weapons to suppress the viability of conspecifics, we may be able to exploit those species-specific chemical cues for selective control of the invader. Cane toads ( Rhinella marina ) are spreading through tropical Australia, with negative effects on native species. The tadpoles of cane toads eliminate intraspecific competitors by locating and consuming newly laid eggs. Our laboratory trials show that tadpoles find those eggs by searching for the powerful bufadienolide toxins (especially, bufogenins) that toads use to deter predators. Using those toxins as bait, funnel-traps placed in natural waterbodies achieved near-complete eradication of cane toad tadpoles with minimal collateral damage (because most native (non-target) species are repelled by the toads' toxins). More generally, communication systems that have evolved for intraspecific conflict provide novel opportunities for invasive-species control.

scholarly journals Non-native Species Surrounding Protected Areas Influence the Community of Non-native Species Within Them

2021 ◽  
Vol 8 ◽  
Author(s):  
Kathrin Holenstein ◽  
William D. Simonson ◽  
Kevin G. Smith ◽  
Tim M. Blackburn ◽  
Anne Charpentier
Keyword(s):  
Protected Areas ◽  
Native Species ◽  
Negative Binomial ◽  
Ecological Impact ◽  
Negative Binomial Regression ◽  
Ecological Impacts ◽  
Conservation Strategies ◽  
Negative Binomial Regression Model ◽  
Binomial Regression ◽  
Surrounding Areas

Protected areas (PAs) are a key element of global conservation strategies aiming to protect habitats and species from various threats such as non-natives species (NNS) with negative ecological impacts. Yet little is known about the mechanisms by which PAs are colonized by NNS, and more specifically the role of colonizing events from surrounding areas. Here, we compared terrestrial and freshwater non-native plants and animals recorded in Norwegian PAs and in 5-km belts around them, using the database of the Norwegian Biodiversity Information Centre Species Map Service. Our analysis included 1,602 NNS and 671 PAs. We found that NNS were recorded in only 23% of the PAs, despite the fact that 90% of the 5-km belts were colonized by at least one NNS. A Zero-inflated negative binomial regression model showed that the number of NNS in the 5-km belts was a strong explanatory variable of the NNS richness inside PAs. Other significant variables included the surface area of the PA, mean human population density in the PA, main type of habitat and accessibility of PAs. We also observed similarity in the species in and around the PAs, with, on average, two thirds of the NNS present in a specific PA also present in its 5-km belt. Furthermore, NNS were recorded in PAs on average 4.5 years after being recorded in the 0–5 km belts, suggesting a dynamic of rapid colonization from the belts to the PAs. Invasive NNS represented 12% of NNS in the belts but 40% in the PAs. This difference was related to the higher abundance of invasive NNS in the belts. Our results highlight the necessity of expanding the focus of NNS management in PAs beyond their boundaries, in particular to prevent incursions of NNS with high negative ecological impact.

scholarly journals Habitat formed by the invasive macroalga Caulerpa filiformis (Suhr) Hering (Caulerpales, Chlorophyta) alters benthic macroinvertebrate assemblages in Peru

2021 ◽  
Author(s):  
Silvia Aguilar ◽  
Pippa J. Moore ◽  
Roberto A. Uribe
Keyword(s):  
Invasive Species ◽  
Benthic Macroinvertebrates ◽  
Ecological Impact ◽  
Ecological Impacts ◽  
Benthic Macroinvertebrate ◽  
Soft Sediment ◽  
Taxonomic Richness ◽  
Macroinvertebrate Assemblages ◽  
Peruvian Coast ◽  
The Impact

Abstract The green macroalga Caulerpa filiformis has been spreading on shallow soft sediment habitats along the Peruvian coast, colonizing previously unvegetated sediments to create monospecific meadows. We examined the nature of the impact of C. filiformis meadows on the density, taxonomic richness and assemblage structure of epifaunal and infaunal benthic macroinvertebrates. Specifically, we tested whether the spread of C. filiformis has resulted in different macroinvertebrate assemblages than those formed by the dominant native macroalgae (i.e., Rhodymenia spp.) and unvegetated sediments. Surveys were undertaken in two bays in each of two locations, in central and southern Peru, during winter 2017 and summer 2018. In general, our results show that macroinvertebrate assemblages were similar across all three habitats, although there were some differences, related to location and season, but with no clear patterns observed. Taxonomic richness and density was generally higher in the vegetated habitats than the unvegetated habitat, and where there were differences between the two vegetated habitats there was no consistent pattern of which habitat supported the highest richness or density. Given invading C. filiformis is primarily colonizing unvegetated habitats it would appear that this species is creating a new niche which supports similar assemblages, but higher taxonomic richness and density than unvegetated habitats. While our study suggests that C. filiformis is having a limited ecological impact we recommend that actions be put in place to limit the spread of this invasive species at the same time as increasing monitoring of the ecological impacts of this species as lags in the ecological impacts of invasive species are common.

scholarly journals Habitat connectivity and resident shared predators determine the impact of invasive bullfrogs on native frogs in farm ponds

2014 ◽  
Vol 281 (1786) ◽  
pp. 20132621 ◽  
Author(s):  
Takashi Atobe ◽  
Yutaka Osada ◽  
Hayato Takeda ◽  
Misako Kuroe ◽  
Tadashi Miyashita
Keyword(s):  
Invasive Species ◽  
Common Carp ◽  
Native Species ◽  
Interspecific Interactions ◽  
Management Strategies ◽  
Habitat Connectivity ◽  
Negative Effects ◽  
The Face ◽  
The Difference ◽  
The Impact

Habitat connectivity is considered to have an important role on the persistence of populations in the face of habitat fragmentation, in particular, for species with conservation concern. However, it can also impose indirect negative effects on native species through the spread of invasive species. Here, we investigated direct and indirect effects of habitat connectivity on populations of invasive bullfrogs and native wrinkled frogs and how these effects are modified by the presence of common carp, a resident shared predator, in a farm pond system in Japan. The distribution pattern analysis using a hierarchical Bayesian modelling indicated that bullfrogs had negative effects on wrinkled frogs, and that these negative effects were enhanced with increasing habitat connectivity owing to the metapopulation structure of bullfrogs. The analysis also suggested that common carp mitigated these impacts, presumably owing to a top-down trophic cascade through preferential predation on bullfrog tadpoles. These presumed interspecific interactions were supported by evidence from laboratory experiments, i.e. predation by carp was more intense on bullfrog tadpoles than on wrinkled frog tadpoles owing to the difference in refuge use. Our results indicate that metacommunity perspectives could provide useful insights for establishing effective management strategies of invasive species living in patchy habitats.

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