Relative importance of exotic species traits in determining invasiveness across levels of establishment: Example of freshwater fish

Functional Ecology, Год журнала: 2023, Номер 37(9), С. 2358 - 2370

Опубликована: Июнь 26, 2023

Abstract Understanding the factors responsible for success of exotic species is a prevalent issue in invasion biology. Although ecological traits are known to play major role, it still unknown which different dimensions invasiveness among vertebrates. Here, we assessed ecological, morphological and behavioural profile 222 freshwater fish along levels establishment, defined by number basins established location establishment. Using trait‐based multidimensional space complemented trait‐by‐trait analysis, attempted classified vertebrates given their intrinsic across establishment ranging from with low super‐established species. We found that were clustered trait space, showing similar characterized low‐temperature amplitude, no parental care zoobenthic diet. By contrast, had broader range functional strategies, high proportion having multiple diets level care. Overall, overlap other at higher Our findings highlight importance considering variability species' more accurately anticipate ability establish spread. Read free Plain Language Summary this article on Journal blog.

Язык: Английский

---

Negative effects of an allelopathic invader on AM fungal plant species drive community‐level responses

Ecology, Год журнала: 2020, Номер 102(1)

Опубликована: Сен. 24, 2020

Abstract The mechanisms causing invasive species impact are rarely empirically tested, limiting our ability to understand and predict subsequent changes in invaded plant communities. Invader disruption of native mutualistic interactions is a mechanism expected have negative effects on species. Specifically, plant‐fungal mutualisms may provide non‐mycorrhizal invaders an advantage over mycorrhizal plants. Invasive Alliaria petiolata (garlic mustard) produces secondary chemicals toxic soil microorganisms including fungi, known induce physiological stress reduce population growth rates forest understory Here, we report 11‐yr manipulative field experiment replicated plots testing if the removal garlic mustard community support mutualism hypothesis within entire herbaceous community. We compare responses for two functional groups: vs. Our results show that weeding alters composition, decreases evenness, increases abundance herbs associate with fungi. Conversely, has no significant Consistent hypothesis, demonstrate allelochemical producing modify by disproportionately impacting also importance incorporating causal biological invasion elucidate patterns community‐level responses.

Язык: Английский

---

Different functional characteristics can explain different dimensions of plant invasion success

Journal of Ecology, Год журнала: 2020, Номер 109(3), С. 1524 - 1536

Опубликована: Дек. 19, 2020

Abstract The success of invasive plant species can be evaluated using different dimensions, such as, range size, abundance and impact. These dimensions do not always covary but are rarely separated, suggesting an urgency to disentangle the functional mechanisms behind them. A dataset leaf traits four invasion (i.e. local abundance, impact on native diversity) were compiled for 395 non‐native in US Europe. Associations among between analysed with general linear models (LMs) supplemented by phylogenetic generalized least square (PGLS) models, which control relatedness across species. pair‐wise associations most pairs weak or neutral. only exception was association diversity, strongly positive. Traits that have large sizes associated a high metabolic rate; whereas, abundant had strong at scale low rate. In addition, size having impacts acquisitive strategies; diversity conservative strategies. Synthesis . Different traits. Invasion regional related promote rapid colonization; potentially less preferred herbivores. Some locally successful invaders even possessed facilitate stress tolerance strategy, similar Therefore, ambiguous definition ‘invasion success’ mechanism‐related studies may produce inconsistent controversial conclusions, highlighting importance separately studying success.

Язык: Английский

---

Evaluation of camera trap‐based abundance estimators for unmarked populations

Ecological Applications, Год журнала: 2021, Номер 31(7)

Опубликована: Июль 13, 2021

Abstract Estimates of species abundance are critical to understand population processes and assess select management actions. However, capturing marking individuals for estimation, while providing robust information, can be economically logistically prohibitive, particularly with cryptic behavior. Camera traps used collect data at temporal spatial scales necessary estimating abundance, but the use camera comes limitations when target not uniquely identifiable (i.e., “unmarked”). Abundance estimation is useful in invasive species, herpetofauna being recognized as some most pervasive detrimental vertebrate species. these taxa presents additional challenges relevancy across multiple taxa. It often lures attract animals order obtain sufficient observations, yet lure attraction influence species’ landscape potentially induce bias estimators. We investigated assessed feasibility obtaining reliable estimates using camera‐trapping on a brown treesnakes ( Boiga irregularis ) Guam. Data were collected an enclosed area where snakes subject high‐intensity capture–recapture effort, resulting presumed 116 (density = 23/ha). then applied count, random encounter staying time, space event, instantaneous sampling estimators photo‐capture estimate compared our abundance. found that all unmarked populations performed poorly, inaccurate or imprecise limit their usefulness this system. further sensitivity violating assumption animal behavior unchanged by sampling) density simulation study. Increasing effective distances attraction) both resulted biased estimates. Each estimator rarely recovered truth suffered from convergence issues. Our results indicate that, limited lures, alone unlikely produce utility treesnake management.

Язык: Английский

---

The right tree in the right place? A major economic tree species poses major ecological threats

Biological Invasions, Год журнала: 2022, Номер 25(1), С. 39 - 60

Опубликована: Авг. 13, 2022

Abstract Tree species in the Pinaceae are some of most widely introduced non-native tree globally, especially southern hemisphere. In New Zealand, plantations radiata pine ( Pinus D. Don) occupy c . 1.6 million ha and form 90% planted forests. Although has naturalized since 1904, there is a general view Zealand that this not invaded widely. We comprehensively review where throughout Zealand. used combination observational data climate niche modelling to reveal invasion occurred nationally. Climate demonstrates while current occurrences patchy, up 76% land area (i.e. 211,388 km 2 ) climatically capable supporting populations. Radiata mainly grasslands shrublands, but also Notably, it lower-statured vegetation, including three classes naturally uncommon ecosystems, primary successions secondary successions. Overall, our findings demonstrate pervasive ongoing outside plantations. The relatively high growth rates per individual effects may result strong on ecosystems alter successional trajectories. Local central government currently manage invasions propagule pressure from existing new grows, hence greater emphasis warranted both managing proactively preventing future invasions. therefore recommend levy conifer offset costs invasions, stricter regulations protect vulnerable ecosystems. A economic uses invasive alongside could be adopted measure avert negative impacts.

Язык: Английский

---