The shape of abundance distributions across temperature gradients in reef fishes

Ecology Letters, Год журнала: 2019, Номер 22(4), С. 685 - 696

Опубликована: Фев. 10, 2019

Improving predictions of ecological responses to climate change requires understanding how local abundance relates temperature gradients, yet many factors influence in wild populations. We evaluated the shape thermal-abundance distributions using 98 422 estimates 702 reef fish species worldwide. found that curved ceilings related sea temperatures for most species, where declined from realised thermal 'optima' towards warmer and cooler environments. Although generally supporting abundant-centre hypothesis, also displayed asymmetrical distributions. For tropical abundances did not decline at warm distribution edges due an unavailability environments equator. Habitat transitions coral macroalgal dominance subtropical zones influenced shapes. By quantifying constraining species' abundance, we provide important empirical basis improving community re-structuring a world.

Язык: Английский

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Tracking a killer shrimp: Dikerogammarus villosus invasion dynamics across Europe

Diversity and Distributions, Год журнала: 2022, Номер 29(1), С. 157 - 172

Опубликована: Ноя. 6, 2022

Abstract Aim Invasive alien species are a growing problem worldwide due to their ecological, economic and human health impacts. The “killer shrimp” Dikerogammarus villosus is notorious invasive amphipod from the Ponto‐Caspian region that has invaded many fresh brackish waters across Europe. Understandings of large‐scale population dynamics highly impactful invaders such as D. lacking, inhibiting predictions impact efficient timing management strategies. Hence, our aim was assess trends well its impacts in freshwater rivers streams. Location Methods We analysed 96 European time series between 1994 2019 identified relative abundance (i.e. dominance %) series, set site‐specific characteristics identify drivers determinants changes invasion using meta‐regression modelling. also looked at spread over space estimate speed (km/year) investigated on recipient community metrics abundance, taxa richness, temporal turnover, Shannon diversity Pielou evenness) generalized linear models. Results Population varied series. Nevertheless, increased all frequency occurrences (used proxy for invader spread) described by Pareto distribution, whereby we estimated lag phase introduction spatial expansion) approximately 28 years, followed gradual increase before new declined rapidly long term. change associated with decreased turnover diversity. Main Conclusion Our results show well‐established significantly alters ecological communities. However, multidecadal prior observed expansion suggests initial introductions cryptic, thus signalling need more effective early detection methods.

Язык: Английский

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Assessing impacts of a notorious invader (common carp Cyprinus carpio) on Australia's aquatic ecosystems: Coupling abundance-impact relationships with a spatial biomass model

Biological Conservation, Год журнала: 2024, Номер 290, С. 110420 - 110420

Опубликована: Янв. 12, 2024

Язык: Английский

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Management Policies for Invasive Alien Species: Addressing the Impacts Rather than the Species

BioScience, Год журнала: 2020, Номер 71(2), С. 174 - 185

Опубликована: Окт. 19, 2020

Abstract Effective long-term management is needed to address the impacts of invasive alien species (IAS) that cannot be eradicated. We describe fundamental characteristics policies for IAS, diagnose a major shortcoming, and outline how produce effective IAS management. Key international transnational conflate addressing with controlling populations. This serious purpose–implementation gap can preclude development broader portfolios interventions tackle impacts. posit strategies should directly via impact-based interventions, we propose six criteria inform choice these interventions. review examples focused on tackling impacts, including control, which reveal range available their varying effectiveness in counteracting As caused by increase globally, stakeholders need have access more set tools respond.

Язык: Английский

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On the RIP: using Relative Impact Potential to assess the ecological impacts of invasive alien species

NeoBiota, Год журнала: 2020, Номер 55, С. 27 - 60

Опубликована: Апрель 3, 2020

Invasive alien species continue to arrive in new locations with no abatement rate, and thus greater predictive powers surrounding their ecological impacts are required. In particular, we need improved means of quantifying the invasive under different contexts. Here, develop a suite metrics based upon novel Relative Impact Potential (RIP) metric, combining functional response (consumer per capita effect), proxies for numerical population response), providing quantification impact. These comparative relation eco-evolutionary baseline trophically analogous natives, as well other across multiple populations. Crucially, also reveal how change abiotic biotic While studies focused solely on responses have been successful invasion ecology, RIP retains these advantages while adding vital elements, principally consumer abundance. can be combined propagule pressure quantify overall risk. By highlighting proxies, outline user-friendly method assessing invaders all trophic levels taxonomic groups. We apply metric impact assessment face climate by taking account both changing predator consumption rates prey reproduction rates. proceed application assess resistance against incoming species, effect evolution impacts, interspecific competition, spatio-temporal patterns invasion, inform biological control. propose that provides scientists practitioners user-friendly, customisable and, crucially, powerful technique policy management.

Язык: Английский

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Invasive plants negatively impact native, but not exotic, animals

Global Change Biology, Год журнала: 2019, Номер 25(11), С. 3694 - 3705

Опубликована: Авг. 7, 2019

Abstract Despite our growing understanding of the impacts invasive plants on ecosystem structure and function, important gaps remain, including whether native exotic species respond differently to plant invasion. This would elucidate basic ecological interactions inform management. We performed a meta‐analytic review effects resident animals. found that reduced abundance native, but not exotic, varied by animal phyla, with reducing annelids chordates, mollusks or arthropods. dissimilar among “wet” “dry” ecosystems, trophic levels. Additionally, impact increased over time, this did vary nativity. Our no studies considered nativity differences, most identify animals species. call for more rigorous invaded community across taxa, importantly, explicit consideration biogeographic origin. provide an first insight into how invasion, consequences which may facilitate cascading disruptions further exacerbating global change function.

Язык: Английский

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Non‐native species have multiple abundance–impact curves

Ecology and Evolution, Год журнала: 2020, Номер 10(13), С. 6833 - 6843

Опубликована: Июнь 4, 2020

Abstract The abundance–impact curve is helpful for understanding and managing the impacts of non‐native species. Abundance–impact curves can have a wide range shapes (e.g., linear, threshold, sigmoid), each with its own implications scientific management. Sometimes, has been viewed as property species, single I argue that determined jointly by species ecosystem it invades, so may multiple curves. Models invasive mussel Dreissena show how multiple, noninterchangeable To extent characteristics determine curve, based on horizontal designs (space‐for‐time substitution) be misleading should used great caution, at all. It important scientists managers to correctly specify when considering Diverting attention from invading invaded ecosystem, especially interaction between could improve our affect ecosystems reduce uncertainty around effects management populations

Язык: Английский

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Neophyte invasions in European grasslands

Journal of Vegetation Science, Год журнала: 2021, Номер 32(2)

Опубликована: Март 1, 2021

Abstract Questions The human‐related spread of alien plants has serious environmental and socioeconomic impacts. Therefore, it is important to know which habitats are most threatened by invasion why. We studied a wide range European grasslands assess: (a) species the successful invaders in grasslands; (b) how levels differ across regions (countries or their parts) biogeographical regions; (c) habitat types invaded. Location Europe. Methods selected 97,411 grassland vegetation plots from Vegetation Archive (EVA) assigned native status each 8,212 vascular plant found these plots. considered only neophytes (alien introduced after 1500 AD), we further divided according origin. compared using relative neophyte richness pool, cover per plot, percentages invaded among habitats. Results Only 536 species, representing 6.5% all were classified as neophytes. These mostly therophytes hemicryptophytes with low specificity. Most them present very few plots, while three recorded more than 1% ( Onobrychis viciifolia , Erigeron annuus canadensis ). Although generally low, Boreal Continental regions. When considering non‐European neophytes, Pannonian region was Among different habitats, sandy invaded, alpine oromediterranean least Conclusions In general, natural semi‐natural have relatively invasions human‐made alluvial forests, well on other continents. typical invading broad ecological niches.

Язык: Английский

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Non‐native plants have greater impacts because of differing per‐capita effects and nonlinear abundance–impact curves

Ecology Letters, Год журнала: 2019, Номер 22(8), С. 1214 - 1220

Опубликована: Май 21, 2019

Invasive, non-native species can have tremendous impacts on biotic communities, where they reduce the abundance and diversity of local species. However, it remains unclear whether arise from their high or each individual has a disproportionate impact - that is, higher per-capita effect co-occurring compared to by native Using long-term study wetlands, we asked how temporal variation in dominant plants impacted richness other recipient community. Non-native reached abundances than natives had greater effects. The abundance-impact relationship between plant was nonlinear. Compared with increasing abundance, associated steeper declines because effects nonlinearities relationship. Our supports eco-evolutionary novelty non-natives as driver outsized communities.

Язык: Английский

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Taming the terminological tempest in invasion science

Опубликована: Сен. 6, 2023

Standardized terminology in science is important for clarity of interpretation and communication. In invasion — a dynamic quickly evolving discipline the rapid proliferation technical has lacked standardized framework its language development. The result convoluted inconsistent usage terminology, with various discrepancies descriptions damages interventions. A therefore needed clear, universally applicable, consistent to promote more effective communication across researchers, stakeholders, policymakers. Inconsistencies stem from exponential increase scientific publications on patterns processes biological invasions authored by experts disciplines countries since 1990s, as well legislators policymakers focusing practical applications, regulations, management resources. Aligning standardizing stakeholders remains prevailing challenge science. Here, we review evaluate multiple terms used (e.g. 'non-native', 'alien', 'invasive' or 'invader', 'exotic', 'non-indigenous', 'naturalized, 'pest') propose simplified terminology. streamlined translate into 28 other languages based (i) denoting species transported beyond their natural biogeographic range, (ii) 'established non-native', i.e. those non-native that have established self-sustaining populations new location(s) wild, (iii) 'invasive non-native' recently spread are spreading rapidly invaded range actively passively without human mediation. We also highlight importance conceptualizing 'spread' classifying invasiveness 'impact' management. Finally, protocol (1) dispersal mechanism, (2) origin, (3) population status, (4) impact. Collectively introducing present aims facilitate collaboration species.

Язык: Английский

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