Invasiveness and impact of the non-native shrub Baccharis halimifolia in sea rush marshes: fine-scale stress heterogeneity matters

Caño, Lidia; Campos, Juan Antonio; García-Magro, D.; Herrera, Mercedes

doi:10.1007/s10530-014-0648-7

Cited by 15 publications

(5 citation statements)

References 46 publications

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“…This result is, however, consistent with higher cover of B. halimifolia on low salinity soil types (Caño et al. ), or a higher proportion of 100% cover in wet meadows (see Appendix S1), and a linear decrease of community diversity with increasing cover. The observed ‘community effect’ can also result from differences in the resident community composition or in functional diversity, which can lead to different levels of biotic resistance (Byun et al.…”

Section: Discussionsupporting

confidence: 83%

“…Such variations could be associated with different abiotic conditions, as observed in the study of Caño et al. (), who found higher impact of B. halimifolia on native species richness in medium and high salinity community types. The opposite pattern was observed in our study, with higher impacts on communities developing on low salinity soils.…”

Section: Discussionmentioning

confidence: 76%

“…In this study, we investigated the effects of Baccharis halimifolia , a North American shrub invading European coastal salt marshes (Caño et al. ; Fried et al. ), comparing its impacts with those of the native Mediterranean Tamarix gallica.…”

Section: Introductionmentioning

confidence: 99%

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Comparing an exotic shrub's impact with that of a native life form analogue: Baccharis halimifolia vs Tamarix gallica in Mediterranean salt marsh communities

Fried

Panetta

2016

J Vegetation Science

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Nomenclature Tison & de Foucault (2014) for vascular plants, Julve AbstractQuestions: To what extent may impact vary according to the invaded community, region or sites? Do impact thresholds exist, above which native species richness and/or cover declines rapidly? Does impact following invasion by the exotic shrub Baccharis halimifolia differ from that of a native shrub (Tamarix gallica) during natural successions?Location: Mediterranean coast, SE France.Methods: Vegetation was sampled on 120 4-m² quadrats, half of which were in areas invaded by B. halimifolia and the other half in nearby non-invaded areas, in two distinct community types nested in three sites in each of two regions. Mixed models were built to explain variations in impacts on native vegetation according to community types, sites and regions. Next, 85 additional plots variously invaded by B. halimifolia were used to assess the nature of the relationships between B. halimifolia cover and impact in Juncus communities. Linear regressions were compared to polynomial regressions, and when relevant, regression trees were built to identify threshold values. Finally, we compared the vegetation from 90 plots either dominated by B. halimifolia, by T. gallica (a native shrub) or without a shrub layer (control) using dissimilarity indices in wet meadows.Results: The magnitude of B. halimifolia impacts depended mainly on community type, with no differences between regions. Community structure (species richness, Shannon's diversity) declined linearly with increasing cover of B. halimifolia, with the most rapid decline in annual species. Native species cover fitted better with a cubic regression, with an impact threshold of around 86% cover of B. halimifolia. Impact of B. halimifolia on community diversity was higher than that of the native shrub T. gallica. While the magnitude of species composition changes was comparable for both shrubs, the higher nestedness component of dissimilarity found for B. halimifolia may indicate a higher short-term impact.Conclusion: Improved understanding of the impacts of exotic shrubs on community structure and composition can be gained via comparisons with the impacts caused by native shrubs. Higher impacts of the exotic B. halimifolia on Mediterranean salt marsh vegetation are likely explained by a denser canopy, shorter juvenile period and more frequent recruitment.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 76%

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Comparing an exotic shrub's impact with that of a native life form analogue: Baccharis halimifolia vs Tamarix gallica in Mediterranean salt marsh communities

Fried

Panetta

2016

J Vegetation Science

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“…We measured height, canopy width and basal stem diameter of the mother shrubs as surrogates of maternal shrub size. Age was estimated by stem node counts in the longest branch of the shrubs, as shown in previous research (Caño et al, 2014; Lázaro‐Lobo et al, 2020). We also randomly selected a maximum of 12 inflorescences in the mother shrubs to measure inflorescence length and width and count the number of flower heads per inflorescence as well as the number of seeds within a maximum of 24 intact flower heads, depending on the number of inflorescences and flower heads available.…”

Section: Methodsmentioning

confidence: 99%

Phenotypic differentiation among native, expansive and introduced populations influences invasion success

Lázaro-Lobo

Moles

Fried

et al. 2021

Journal of Biogeography

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Aim Humans influence species distributions by modifying the environment and by dispersing species beyond their natural ranges. Populations of species that have established in disjunct regions of the world may exhibit trait differentiation from native populations due to founder effects and adaptations to selection pressures in each distributional region. We compared multiple native, expansive and introduced populations of a single species across the world, considering the influence of environmental stressors and transgenerational effects. Location United States Gulf and Atlantic coasts, United States interior, European Atlantic and Mediterranean coasts, east coast of Australia. Taxon Baccharis halimifolia L. (eastern baccharis). Methods We monitored seed germination, seedling emergence, survival and early growth in a common garden experiment, conducted with over 18,200 seeds from 80 populations. We also evaluated the influence of environmental stress and maternal traits on progeny performance. Results Introduced European Atlantic populations had faster germination and early growth than native populations. However, this was not the case for the more recently naturalized European Mediterranean populations. Introduced Australian populations grew faster than native populations in non‐saline environments but had lower survival in saline conditions commonly encountered in the native range. Similarly, expansive inland US populations germinated faster than coastal native populations in non‐saline environments but grew and germinated more slowly in saline environments. Maternal inflorescence and plant size were positively related with seed germination and seedling survival, whereas flower abundance was positively correlated with seedling early growth and survival. However, maternal traits explained a much lower fraction of the total variation in early demographic stages of B. halimifolia than did distributional range. Main conclusions Phenotypic differentiation could allow B. halimifolia to adapt to different biotic and abiotic selection pressures found in each distributional range, potentially contributing to its success in introduced and expansive ranges.

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“…Entretanto, o cultivo da espécie B. halimifolia exige cuidado, pois ela se encontra atualmente na lista consolidada de IAS of Union Concern (Regulamento UE 1262/2019), em razão da sua densa supressão sob a vegetação nativa nas dunas costeiras do Atlântico. Esta espécie apresenta alto efeito negativo sobre a estrutura das comunidades de plantas nativas, pressão competitiva sobre outras espécies de plantas, promovendo, inclusive, o desaparecimento de espécies de plantas nativas, além de afetar a alimentação, descanso e nidificação de algumas espécies de pássaros (CAMPOS et al, 2004;HERRERA E CAMPOS 2010;ARIZAGA UNAMUNO E CLARABUCH, 2013;CAÑO et al, 2014). Uma outra característica negativa da espécie, é que o arbusto apresenta resinas inflamáveis, logo, apresenta um perigo de incêndio, principalmente em épocas quentes do ano.…”

Section: Pesquisas Realizadas Porunclassified

Análise da prospecção tecnológica por meio de revisão sistemática seguida de meta análise das patentes do gênero Baccharis

Amancio,

Silva,

García

et al. 2023

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Invasiveness and impact of the non-native shrub Baccharis halimifolia in sea rush marshes: fine-scale stress heterogeneity matters

Cited by 15 publications

References 46 publications

Comparing an exotic shrub's impact with that of a native life form analogue: Baccharis halimifolia vs Tamarix gallica in Mediterranean salt marsh communities

Comparing an exotic shrub's impact with that of a native life form analogue: Baccharis halimifolia vs Tamarix gallica in Mediterranean salt marsh communities

Phenotypic differentiation among native, expansive and introduced populations influences invasion success

Análise da prospecção tecnológica por meio de revisão sistemática seguida de meta análise das patentes do gênero Baccharis

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