Number of source populations as a potential driver of pine invasions in Brazil

Zenni, Rafael Dudeque; Simberloff, Daniel

doi:10.1007/s10530-012-0397-4

Cited by 44 publications

(32 citation statements)

References 66 publications

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“…A national database of invasive alien species in Brazil has been constructed (Zenni and Ziller, 2013)-with information on taxonomy, biology, introduction history, impacts, and occurrences-but the data are mostly observational presence records without measures of local abundance, extent, spread, and are often not linked to physical herbarium records. Parallel to this large-scale rough collection of cases of invasions, a few studies are starting to be published with local detailed evaluations of invasions abundance, extent, spread, and impact (de Abreu and Durigan 2011; Mengardo et al 2012;Zenni and Simberloff 2013). With more time and more work, the local more detailed studies will start to feed regional and national assessments of invasions to improve management, research, and public policy.…”

Section: Discussionmentioning

confidence: 99%

A standardized set of metrics to assess and monitor tree invasions

et al. 2013

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Scientists, managers, and policy-makers need functional and effective metrics to improve our understanding and management of biological invasions. Such metrics would help to assess progress towards management goals, increase compatibility across administrative borders, and facilitate comparisons between invasions. Here we outline key characteristics of tree invasions (status, abundance, spatial extent, and impact), discuss how each of these characteristics changes with time, and examine potential metrics to describe and monitor them. We recommend quantifying tree invasions using six metrics: (a) current status in the region; (b) potential status; (c) the number of foci requiring management; (d) area of occupancy (AOO) (i.e. compressed canopy area or net infestation); (e) extent of occurrence (EOO)(i.e. range size or gross infestation); and (f) observa-tions of current and potential impact. We discuss how each metric can be parameterised (e.g. we include a practical method for classifying the current stage of invasion for trees following Blackburn's unified framework for biological invasions); their potential management value (e.g. EOO provides an indication of the area over which management is needed); and how they can be used in concert (e.g. combining AOO and EOO can provide insights into invasion dynamics; and we use potential status and threat together to develop a simple risk analysis tool). Based on these metrics, we propose a standardized template for reporting tree invasions that we hope will facilitate cross-species and inter-regional comparisons. While we feel this represents a valuable step towards standardized reporting, there is an urgent need to develop more consistent metrics for impact and threat, and for many specific purposes additional metrics are still needed (e.g. detectability is required to assess the feasibility of eradication).

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Section: Discussionmentioning

confidence: 99%

A standardized set of metrics to assess and monitor tree invasions

et al. 2013

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“…Also, invasive populations of Pinus radiata in Australia are scarce, despite being widely planted (Williams and Wardle 2007), while in South Africa and New Zealand, where P. radiata was extensively planted during the 19th and 20th centuries, invasive populations are common (Richardson 1998, Simberloff et al 2010). In Argentina, P. radiata is well established in some regions but fails to establish in others, and in southern Brazil and Uruguay plantations of P. radiata exist but there is no record of naturalized populations outside plantations (Simberloff et al 2010, Zenni and Simberloff 2013).…”

Section: Failed Invasions and Propagule Pressurementioning

confidence: 99%

The elephant in the room: the role of failed invasions in understanding invasion biology

Zenni

Núñez

2013

Oikos

194

156

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Most species introductions are not expected to result in invasion, and species that are invasive in one area are frequently not invasive in others. However, cases of introduced organisms that failed to invade are reported in many instances as anecdotes or are simply ignored. In this analysis, we aimed to find common characteristics between non‐invasive populations of known invasive species and evaluated how the study of failed invasions can contribute to research on biological invasions. We found intraspecific variation in invasion success and several recurring explanations for why non‐native species fail to invade; these included low propagule pressure, abiotic resistance, biotic resistance, genetic constraints and mutualist release. Furthermore, we identified key research topics where ignoring failed invasions could produce misleading results; these include studies on historical factors associated with invasions, distribution models of invasive species, the effect of species traits on invasiveness, genetic effects, biotic resistance and habitat invasibility. In conclusion, we found failed invasions can provide fundamental information on the relative importance of factors determining invasions and might be a key component of several research topics. Therefore, our analysis suggests that more specific and detailed studies on invasion failures are necessary.

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“…Some biomes (e.g., Cerrado and Pampa) may be highly susceptible to invasions by some of the most common tree plantations (Abreu and Durigan 2011). The invasive potential can be related to a larger size of planted species in relationship to native vegetation (Pysĕk et al 2014), to adaptations possessed by some tree species (Zenni et al 2014), and to ecological and physiological characteristics of planted species (Zenni et al 2013). For instance, P. eliotti Engelm.…”

Section: Discussionmentioning

confidence: 99%

Ecological impacts of non-native tree species plantations are broad and heterogeneous: a review of Brazilian research

Valduga

Zenni

Vitule

2016

An. Acad. Bras. Ciênc.

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Non-native tree plantations represent 7% of the world's forests and 1.24% of the Brazilian vegetation. Planted areas are expected to increase in the near future; thus, it is important to systematize existing knowledge on the ecological effects of plantations to aid forest management and biodiversity conservation. Here, we conducted a systematic review of the ecological literature associated with planted Pinus and Eucalyptus species in Brazil. We compared publication metrics with geographical distribution of species, ecosystems, biomes, studied taxa, and ecological impacts. We found 152 publications from 1992 to 2012. Number of publications positively correlated with area planted, number of plantations with forest certification, number of researchers, and richness of studied kingdoms. Most studies were in terrestrial ecosystems (92.1%), the Atlantic Forest biome (55.3%), and the kingdom Animalia (68.2%). Most impacts of non-native tree plantations were negative (55.9%), followed by positive (27%), and mixed (17.1%). Negative impacts were declines in species richness and abundance, seed bank diversity, and natural regeneration. Positive impacts were increase or mainteinance of seed bank diversity and natural regeneration. Mixed impacts were increases in abundance of native tree plantation pests. Taken together, results suggest forest management can help maintain biodiversity if it considers previous environmental conditions and integrates plantations with surrounding habitats.

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Number of source populations as a potential driver of pine invasions in Brazil

Cited by 44 publications

References 66 publications

A standardized set of metrics to assess and monitor tree invasions

A standardized set of metrics to assess and monitor tree invasions

The elephant in the room: the role of failed invasions in understanding invasion biology

Ecological impacts of non-native tree species plantations are broad and heterogeneous: a review of Brazilian research

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