Does stream structure affect dispersal by water? A case study of the invasive tree Ailanthus altissima in Spain

Cabra-Rivas, Isabel

doi:10.3391/mbi.2014.5.2.11

Cited by 13 publications

(10 citation statements)

References 32 publications

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“…Streams as vectors follow in the order of risk. In this case the preventive measures are more complex and the effort should be directed at monitoring of the banks in search of points of entry of species (Cabra-Rivas et al 2014). In general terms, the search actions should focus on streams that correspond to watersheds originating outside the reserve, concentrating the training efforts of personnel dedicated to detection on the set of species transportable by this vector, which clearly increases the chances of an efficient identification.…”

Section: Discussionmentioning

confidence: 99%

Vector analysis: a tool for preventing the introduction of invasive alien species into protected areas

Brancatelli¹,

Zalba²

2018

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Citation: Brancatelli GIE, Zalba SM (2018) Vector analysis: a tool for preventing the introduction of invasive alien species into protected areas. Nature Conservation 24: 43-63. https://doi. AbstractInvasive alien species are the main agent of biodiversity loss in protected natural areas. Prevention is the most appropriate management tool for addressing this challenge, however, virtually all ongoing management efforts are focused on established populations. Although invasion processes include stochastic components, it is possible to compare the different vectors of introduction that operate in a particular area in terms of their potential to transport species of high risk of invasion efficiently and, once identified, to establish strategies of prevention, early detection and rapid action. This study proposes a system of prioritization of vectors of alien plant dispersal for optimizing the efforts for preventing invasion. The system was developed for the Ernesto Tornquist Provincial Park (province of Buenos Aires, Argentina), but it is directly applicable to other areas. Natural and anthropogenic vectors were evaluated and lists of the species potentially transported by each vector were elaborated according to the characteristics of their propagules. The system analyzes the relative importance of each vector according to: 1) the severity of the potential impact of transportable species, 2) the difficulty of controlling these species, and 3) the volume of transportable propagules. In the case under study, the maximum value of risk corresponds to cargo, followed by vehicles, streams, unintentional human transport, intentional human transport, wind and finally, animals. This analysis can lead to prevention strategies, mapping of dispersal routes and actions of early detection and rapid response.

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Section: Discussionmentioning

confidence: 99%

Vector analysis: a tool for preventing the introduction of invasive alien species into protected areas

Brancatelli¹,

Zalba²

2018

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“…Streams can also act as corridors for invasions by carrying plant propagules downstream and sideways (e.g. during floods) (Cabra-Rivas, Alonso & Castro-Díez, 2014;Catford & Jansson, 2014;Kuglerová et al, 2015;Cuda et al, 2017). On the other hand, human activities such as forestry, agriculture and urbanization often compete for space with riparian forests leading to their degradation (Pennington, Hansel & Gorchov, 2010).…”

Section: Introductionmentioning

confidence: 99%

Invasion of temperate deciduous broadleaf forests by N‐fixing tree species – consequences for stream ecosystems

et al. 2021

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Biological invasions are a major threat to biodiversity and ecosystem functioning. Forest invasion by alien woody species can have cross-ecosystem effects. This is especially relevant in the case of stream-riparian forest meta-ecosystems as forest streams depend strongly on riparian vegetation for carbon, nutrients and energy. Forest invasion by woody species with dissimilar characteristics from native species may be particularly troublesome. The invasion of temperate deciduous broadleaf forests with low representation of nitrogen (N)-fixing species by N-fixers has the potential to induce ecosystem changes at the stream level. Although effects of tree invasion on stream ecosystems have been under assessed, knowledge of native and invasive tree characteristics allows prediction of invasion effects on streams. Here we present a conceptual model to predict the review of the literature addressing effects of increasing cover of N-fixing species on streams suggests a wide application of the model, while it highlights the need to consider differences in the type of system and species when making generalizations. Changes induced by N-fixing species invasion on streams can jeopardize multiple ecosystem services (e.g. good quality water, hydroelectricity, leisure activities), with relevant social and economic consequences.

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“…For secondary anemochory, it is known that most winged seeds could be transported between 30 m (Venturas et al, 2014) and less than high wind conditions, which could conceivably provide a mechanism for the transport of samaras occasionally over larger distances. For secondary hydrochory, it is well established that samaras are capable of floating (Kowarik & Säumel, 2008;Säumel & Kowarik, 2010, but potential travel distances have not been measured in any species except Ailanthus altissima (Kaproth & McGraw, 2008;Säumel & Kowarik, 2013;Cabra-Rivas, Alonso & Castro-Diez, 2014). The effect of saltwater submersion on germination must also be understood if we are to determine whether samaroid seeds can disperse long-distances across seas or oceans.…”

Section: Future Researchmentioning

confidence: 99%

Secondary dispersal mechanisms of winged seeds: a review

Weduwen

Ruxton

2019

Biological Reviews

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Winged seeds, or samaras, are believed to promote the long‐distance dispersal and invasive potential of wind‐dispersed trees, but the full dispersive potential of these seeds has not been well characterised. Previous research on the ecology of winged seeds has largely focussed on the initial abscission and primary dispersal of the samara, despite it being known that the primary wind dispersal of samaras is often over short distances, with only rare escapes to longer distance dispersal. Secondary dispersal, or the movement of the seeds from the initial dispersal area to the site of germination, has been largely ignored despite offering a likely important mechanism for the dispersal of samaras to microhabitats suitable for establishment. Herein, we synthesise what is known on the predation and secondary dispersal of winged seeds by multiple dispersive vectors, highlighting gaps in knowledge and offering suggestions for future research. Both hydrochory and zoochory offer the chance for samaroid seeds to disperse over longer distances than anemochory alone, but the effects of the wing structure on these dispersal mechanisms have not been well characterised. Furthermore, although some studies have investigated secondary dispersal in samaroid species, such studies are scarce and only rarely track seeds from source to seedling. Future research must be directed to studying the secondary dispersal of samaras by various vectors, in order to elucidate fully the invasive and colonisation potential of samaroid trees.

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Does stream structure affect dispersal by water? A case study of the invasive tree Ailanthus altissima in Spain

Cited by 13 publications

References 32 publications

Vector analysis: a tool for preventing the introduction of invasive alien species into protected areas

Vector analysis: a tool for preventing the introduction of invasive alien species into protected areas

Invasion of temperate deciduous broadleaf forests by N‐fixing tree species – consequences for stream ecosystems

Secondary dispersal mechanisms of winged seeds: a review

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