Long-term data on invaders: when the fox is away, the mink will play

Carlsson, Nils O. L.; Jeschke, Jonathan M.; Holmqvist, Niklas; Kindberg, Jonas

doi:10.1007/s10530-009-9470-z

Cited by 64 publications

(47 citation statements)

References 45 publications

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“…3). Due to this type 3 functional response relationship, the system may be exhibiting ''partial'' biotic resistance (Carlsson et al 2010); predators may be able to limit the growth and spread of the invader, though predators are not able to absolutely exclude the invader from establishing in the community (Levine et al 2004).…”

Section: Discussionmentioning

confidence: 99%

Using the functional response of a consumer to predict biotic resistance to invasive prey

Twardochleb

Novák

Moore

2012

Ecological Applications

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Abstract. Predators sometimes provide biotic resistance against invasions by nonnative prey. Understanding and predicting the strength of biotic resistance remains a key challenge in invasion biology. A predator's functional response to nonnative prey may predict whether a predator can provide biotic resistance against nonnative prey at different prey densities. Surprisingly, functional responses have not been used to make quantitative predictions about biotic resistance. We parameterized the functional response of signal crayfish (Pacifastacus leniusculus) to invasive New Zealand mud snails (Potamopyrgus antipodarum; NZMS) and used this functional response and a simple model of NZMS population growth to predict the probability of biotic resistance at different predator and prey densities. Signal crayfish were effective predators of NZMS, consuming more than 900 NZMS per predator in a 12-h period, and Bayesian model fitting indicated their consumption rate followed a type 3 functional response to NZMS density. Based on this functional response and associated parameter uncertainty, we predict that NZMS will be able to invade new systems at low crayfish densities (,0.2 crayfish/m 2 ) regardless of NZMS density. At intermediate to high crayfish densities (.0.2 crayfish/m 2 ), we predict that low densities of NZMS will be able to establish in new communities; however, once NZMS reach a threshold density of ;2000 NZMS/m 2 , predation by crayfish will drive negative NZMS population growth. Further, at very high densities, NZMS overwhelm predation by crayfish and invade. Thus, interacting thresholds of propagule pressure and predator densities define the probability of biotic resistance. Quantifying the shape and uncertainty of predator functional responses to nonnative prey may help predict the outcomes of invasions.

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Section: Discussionmentioning

confidence: 99%

Using the functional response of a consumer to predict biotic resistance to invasive prey

Twardochleb

Novák

Moore

2012

Ecological Applications

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“…According to another, very general formulation of this hypothesis, ecosystems with a high biodiversity and a low level of disturbance should be more resistant to invaders than ecosystems with a low biodiversity and a high level of disturbance (Jeschke and Genovesi 2011). Yet another formulation focuses on disturbance and leaves out diversity (Mack et al 2000), and other factors have also been tested to see if they influence an ecosystem's resistance to invaders, e.g., the presence of keystone predators (Carlsson et al 2010).…”

Section: Invasion Theory: Lack Of Synthesis and Imprecise Hypothesesmentioning

confidence: 99%

Conceptual Frameworks and Methods for Advancing Invasion Ecology

Heger

Pahl

Botta‐Dukát

et al. 2013

AMBIO

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Invasion ecology has much advanced since its early beginnings. Nevertheless, explanation, prediction, and management of biological invasions remain difficult. We argue that progress in invasion research can be accelerated by, first, pointing out difficulties this field is currently facing and, second, looking for measures to overcome them. We see basic and applied research in invasion ecology confronted with difficulties arising from (A) societal issues, e.g., disparate perceptions of invasive species; (B) the peculiarity of the invasion process, e.g., its complexity and context dependency; and (C) the scientific methodology, e.g., imprecise hypotheses. To overcome these difficulties, we propose three key measures: (1) a checklist for definitions to encourage explicit definitions; (2) implementation of a hierarchy of hypotheses (HoH), where general hypotheses branch into specific and precisely testable hypotheses; and (3) platforms for improved communication. These measures may significantly increase conceptual clarity and enhance communication, thus advancing invasion ecology.

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“…oceanica has an adequate response to several exotic species. The traditional view of biotic resistance against invaders has been either black or white, success or failure (Carlsson et al 2010); in the case of invasive ants, they are mostly successful (especially on oceanic islands or in disturbed habitats), but studies showing cases of native ant biotic resistance against invaders are increasing (Rao and Vinson 2004;Wetterer et al 2006;Blight et al 2010;Masciocchi et al 2010).…”

Section: Temperature and Activity Rhythmsmentioning

confidence: 99%

Ant community structure on a small Pacific island: only one native species living with the invaders

et al. 2011

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In most studies about ant communities, species are grouped into competitive hierarchies where top dominants drive the majority of other species away from resources. Nevertheless, in some ecosystems high ground temperatures may disrupt this hierarchical organization. Other changes in community structure are caused by the arrival of invasive ant species, which rapidly disassemble local communities. We studied the effects of competition and temperature on ant community organization on Surprise Island (New Caledonia). Four different habitats were distinguished: a central plain, a sea shore Argusia shrubland, a dense Scaveola shrub, and an arboreal Pisonia strata. Eight ant species were identified from pitfall traps (seven introduced and only one native species, Pheidole oceanica). Ant assemblages in each habitat had a different ecologically dominant species, and a dominant species in one habitat could be non-dominant and less abundant in another. From interactions at baits, we built a competitive hierarchy where the top dominant species was the native Ph. oceanica. Daily foraging activity rhythms of the different species mostly overlapped. The relationship between bait occupation and ground temperature followed a negative linear pattern at all sites and for most species, except for the relatively thermophilous Monomorium floricola. Indices of co-occurrence in pitfall traps indicated that species co-occurred randomly with respect to one another. Conversely, species appeared to be segregated when we examined co-occurrence at baits at the sites where Ph. oceanica was abundant. Oceanic islands are very susceptible to alien species, but on Surprise Island it seems that the sole native species dominates in some habitats when confronted by invasive species.

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Long-term data on invaders: when the fox is away, the mink will play

Cited by 64 publications

References 45 publications

Using the functional response of a consumer to predict biotic resistance to invasive prey

Using the functional response of a consumer to predict biotic resistance to invasive prey

Conceptual Frameworks and Methods for Advancing Invasion Ecology

Ant community structure on a small Pacific island: only one native species living with the invaders

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