Pteridium aquilinum performance is driven by climate, soil and land-use in Southwest Asia

Amouzgar, Laleh; Ghorbani, Jamshid; Shokri, M; Marrs, Rob H.; Alday, Josu G.

doi:10.1007/s12224-020-09383-3

Cited by 11 publications

(7 citation statements)

References 61 publications

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“…We selected putative predictors (described further below) for determinants of the intensity of regeneration (i.e., seed germination, seedling establishment, and sapling growth) in timber stands based on available literature (Amouzgar et al, 2020 ; Dolling, 1999 ; Junaedi, 2013 ; Lamsal et al, 2019 ; Ojunga et al, 2020 ; Parthasarathy et al, 2011 ; Prasad, 2012 ; Silva & Matos, 2006 ; Sundaram & Hiremath, 2012 ; Wan et al, 2010 ; Yuan & Wen, 2018 ). We assessed the following variables for each plot; the rationale for their inclusion in the analyses is from literature indicated with the variable: elevation (Arévalo et al, 2005 ), slope (Cerdà & García‐Fayos, 1997 ), aspect (Winkler et al, 2016 ), topographic position index (TPI; Frey & Ashton, 2018 ), terrain ruggedness index (TRI; Rhodes & St. Clair, 2018 ), topographic wetness index (TWI; Petroselli et al, 2013 ), and topographic convergence index (TCI; Bunn et al, 2005 ).…”

Section: Methodsmentioning

confidence: 99%

“…In the Shola Sky Islands, the common understory invasive species include Ageratum conyzoides , Ageratum houstonianum , Ageratina adenophora , Lantana camara , Cestrum aurantiacum , and Pteridium aquilinum (Tamil Nadu policy on invasive alien plant species and ecological restoration of habitats— https://www.forests.tn.gov.in/app/webroot/img/document/news/news/TNPIPER_plants‐1.pdf ). Several of these thrive in habitats across the globe (Amouzgar et al, 2020 ; Junaedi, 2013 ; Lamsal et al, 2019 ; Ojunga et al, 2020 ). In novel or modified habitats of timber stands, we expect the understory invasives to thrive in niche spaces similar to their places of origin.…”

Section: Introductionmentioning

confidence: 99%

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Patterns of understory invasion in invasive timber stands of a tropical sky island

Jobin

Das

Harikrishnan

et al. 2023

Ecology and Evolution

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Current climate and land cover change threaten global mountaintops with increased spread of invasive species. Long‐established plantations of invasive trees on these mountaintops can alter their surroundings, further increasing invader‐facilitated invasion. Identifying the ecological conditions promoting such associations can help develop better management interventions. The Western Ghats's Shola Sky Islands (>1400 m MSL) host vast stretches of invasive tree plantations that sustain the colonization of other invasive woody, herbaceous, and fern species in their understories. Here, we analyzed vegetation and landscape variables from 232 systematically placed plots in randomly selected grids using non‐metric multidimensional scaling and Phi coefficient approaches to examine patterns of association (positive interactions) between understory invasive species with specific invasive overstory species. We also conducted GLMM with zero inflation to determine the influence of environmental variables where such associations occur. We find that understory invasion of multiple species under the canopy of other invasives is widespread across the Shola Sky Islands. Stands of Eucalyptus host the colonization of 70% of non‐native invasive species surveyed across the Shola Sky Islands. In particular, the Lantana camara invasion is strongly associated with Eucalyptus stands. We also found that climatic variables affect the colonization of understory woody invasive species, while invasion by exotic herbaceous species is associated with the density of road networks. Canopy cover impacts all invasives negatively, while fire incidence was negatively associated with invasion by Lantana spp. and the Pteridium spp. While the restoration of natural habitats primarily targets the highly invasive Acacia , less invasive Eucalyptus and Pinus are often not included. Our study suggests that retaining such invasive species in natural habitats, particularly protected areas, can hinder ongoing grassland restoration efforts by facilitating further invasions by multiple woody and herbaceous species.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Patterns of understory invasion in invasive timber stands of a tropical sky island

Jobin

Das

Harikrishnan

et al. 2023

Ecology and Evolution

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“…The bracken fern exhibits a widespread global distribution, recognized as an expansive species due to its ability to thrive across diverse environments [ 40 ]. While not invasive in the traditional sense, bracken fern can become problematic in specific regions where it forms dense stands, outcompeting other plant species, especially in areas with nutrient-poor, acidic soils, and increased humidity [ 25 ].…”

Section: Botanical Aspects Of the Plantmentioning

confidence: 99%

Health and Environmental Hazards of the Toxic Pteridium aquilinum (L.) Kuhn (Bracken Fern)

Malík,

Mika,

Navrátilová

et al. 2023

Plants

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Bracken fern (Pteridium aquilinum (L.) Kuhn) is ubiquitous and acts as a cosmopolitan weed in pastures and similar environments. Despite its historical uses, it presents risks due to toxicity. This study, conducted in the second half of 2023, aimed to assess the environmental and health hazards of P. aquilinum, primarily focusing on its carcinogenic compound, ptaquiloside. The literature was comprehensively reviewed using diverse databases, including PubMed, Web of Science, Scopus, and Google Scholar. Information was synthesized from original research articles, meta-analyses, systematic reviews, and relevant animal studies. Animals grazing on bracken fern face annual production losses due to toxin exposure. The substantial impact on biodiversity, animal health, and human well-being arises from the presence of ptaquiloside and related compounds in milk, meat, and water, along with the increasing global prevalence of P. aquilinum and its swift colonization in acidic soil and fire-damaged areas. The objectives were to identify major bioactive compounds and explore their effects at molecular, cellular, pathological, and population levels. Various cooking techniques were considered to mitigate toxin exposure, although complete elimination remains unattainable. Therefore, the findings emphasize the need for cautious consumption. In conclusion, continued research is necessary to better understand and manage its environmental and health implications.

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“…Variation partitioning has mostly been used for multivariate data (e.g. species composition), but is also applicable to univariate data, such as species' performance variables (Amouzgar et al, 2020 ; Nielsen et al, 2007 ; Volis et al, 2011 ).…”

Section: Introductionmentioning

confidence: 99%

Use climatic space‐for‐time substitutions with care: Not only climate, but also local environment affect performance of the key forest species bilberry along elevation gradient

Auestad,

Rydgren,

Halvorsen

et al. 2023

Ecology and Evolution

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An urgent aim of ecology is to understand how key species relate to climatic and environmental variation, to better predict their prospects under future climate change. The abundant dwarf shrub bilberry (Vaccinium myrtillus L.) has caught particular interest due to its uphill expansion into alpine areas. Species' performance under changing climate has been widely studied using the climatic space‐for‐time approach along elevation gradients, but potentially confounding, local environmental variables that vary along elevation gradients have rarely been considered. In this study, performed in 10 sites along an elevation gradient (200–875 m) in W Norway, we recorded species composition and bilberry performance, both vegetative (ramet size and cover) and reproductive (berry and seed production) properties, over one to 4 years. We disentangled effects of local environmental variables and between‐year, climatic variation (precipitation and temperature), and identified shared and unique contributions of these variables by variation partitioning. We found bilberry ramet size, cover and berry production to peak at intermediate elevations, whereas seed production increased upwards. The peaks were less pronounced in extreme (dry or cold) summers than in normal summers. Local environmental variables explained much variation in ramet size and cover, less in berry production, and showed no relation to seed production. Climatic variables explained more of the variation in berry and seed production than in ramet size and cover, with temperature relating to vegetative performance, and precipitation to reproductive performance. Bilberry's clonal growth and effective reproduction probably explain why the species persists in the forest and at the same time invades alpine areas. Our findings raise concerns of the appropriateness of the climatic space‐for‐time approach. We recommend including both climatic and local environmental variables in studies of variation along elevation gradients and conclude that variation partitioning can be a useful supplement to other methods for analysing variation in plant performance.

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Pteridium aquilinum performance is driven by climate, soil and land-use in Southwest Asia

Cited by 11 publications

References 61 publications

Patterns of understory invasion in invasive timber stands of a tropical sky island

Patterns of understory invasion in invasive timber stands of a tropical sky island

Health and Environmental Hazards of the Toxic Pteridium aquilinum (L.) Kuhn (Bracken Fern)

Use climatic space‐for‐time substitutions with care: Not only climate, but also local environment affect performance of the key forest species bilberry along elevation gradient

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