Plant Life of the Dolomites

Pignatti, Erika; Pignatti, Sandro

doi:10.1007/978-3-642-31043-0

Cited by 31 publications

(18 citation statements)

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“…Fieldwork was conducted at the Baita Torino field station in the Passo del Pura, Ampezzo, Friuli-Venezia Giulia, Italy (46°25.5433'N, 12°44.5167'E (DDM), 1400 m asl) between 11:00 and 13:00 on 9, 11 and 12 July 2019. The area is part of the Carnic Alps, which are characterised by high plant biodiversity and endemism (Pignatti and Pignatti 2014). We selected four study sites in the vicinity of the Baita Torino.…”

Section: Site Selectionmentioning

confidence: 99%

Light intensity affects leaf morphology in a wild population of Adenostyles alliariae (Asteraceae)

Francis¹,

Gilman

2019

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Low light conditions can impose environmental stress on plants, and plants often respond adaptively by increasing their leaf area. Light stress on plants can also result in developmental instability, which can manifest as increased fluctuating asymmetry in leaves or other organs. The relationship between light conditions and fluctuating asymmetry has been documented in experimental populations, but has been less frequently observed in the wild. Here, we studied how leaf surface area and fluctuating asymmetry correlate with light intensity in a wild population of Adenostyles alliariae (Asteraceae). We found strong evidence that leaf surface area increases and weak evidence that fluctuating asymmetry increases as light intensity decreases. Our results help to elucidate the relationship between light stress and developmental instability under naturally occurring conditions.

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Section: Site Selectionmentioning

confidence: 99%

Light intensity affects leaf morphology in a wild population of Adenostyles alliariae (Asteraceae)

Francis¹,

Gilman

2019

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“…Augusto et al (2003) reported thicker litter with higher C/N ratios and lower pH for soils under A. alba compared to those under F. sylvatica, although these differences were moderate; likewise, they reported that herb species beneath A. alba were typical of moderately more acidic and nutrient-poor conditions compared to herbs growing under F.sylvatica.Woziwoda and Kopeć (2015) reported similar changes in the herb layer in stands that experienced a long-term loss of A. alba and replacement by broadleaf species; they documented an increase in nitrophilous species and a decline in species that tolerate more nutrient-poor and acidic conditions, presumably due to the decline in conifer litter and the increase in easily decomposable broad leaf litter. According to phytosociological literature, herb species that are typically associated with moderately acidic conditions or a larger component of A. alba include species such as Dryopteris filix-mas, Oxalis acetosella, and Festuca altissima(Leuschner & Ellenberg, 2017;Pignatti & Pignatti, 2013), all of which significantly declined across the study sites. However, because we do not have data on soil chemistry from the initial inventory, this interpretation should be treated with caution.…”

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confidence: 99%

Cascading effects of canopy mortality drive long‐term changes in understorey diversity in temperate old‐growth forests of Europe

Nagel

Iacopetti

Javornik

et al. 2019

J Vegetation Science

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Questions We investigated the influence of protracted mortality of a dominant canopy tree (Abies alba) on long‐term understorey dynamics. We ask (a) how tree regeneration and understorey species diversity and composition changed over 32 years; and (b) whether the observed changes were mainly driven by mortality of A. alba. Location Three old‐growth forest reserves dominated by A. alba and Fagus sylvatica in the Dinaric Mountains of Slovenia. Method Tree layer and understorey regeneration and herbs were surveyed in 147 plots across the three forest reserves in 1983 and 2015. Soils were also sampled in 2015. The study period coincides with a protracted period of increased A. alba mortality in the canopy layer associated with anthropogenic emissions. Results Between 1983 and 2015, the decline in canopy layer A. alba caused a recruitment pulse of F. sylvatica regeneration to the subcanopy tree layer across the three reserves. These changes were accompanied by a significant decline in plot level herb species richness. A model‐based analysis of beta‐diversity revealed significant community convergence during the study period, mainly caused by the loss of rare species. Ellenberg values indicate that these changes were mainly driven by loss of understorey light, while an increase in soil pH may have played a role also. Conclusions This observational study suggests that the long‐term decline of A. alba resulted in a cascade of processes — widespread F. sylvatica recruitment that impeded penetration of light to the forest floor, and possibly a change in soil conditions due to the decline of coniferous litter. These changes caused a significant loss of herb diversity and homogenization of the understorey community across the three sites. This study sheds light on the potential cascading consequences triggered by episodes of increased tree mortality resulting from global‐change‐type drivers.

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“…( In our previous research into alpine vegetation we did not discuss in more detail the swards with dominant Salix serpyllfolia that we found on slightly moist sites on ridges or immediately under them on several high summits in the Julian Alps. Other authors (Grabherr & Mucina 1993, Englisch 1999, E. Pignatti & S. Pignatti 2014 do not report similar communities in other parts of the Southern, Southeastern and Eastern Alps. Only in Englisch et al (1993: 315) there is a note on a Salix serpillifolia community, which belongs to Seslerietalia albicantis, and in Englisch (1999: 179) a note on a Salix serpillifolia form of the association Crepidetum terglouensis Seibert 1977.…”

Section: Izvlečekmentioning

confidence: 90%

Phytosociological analysis of alpine swards with dominant Salix serpillifolia in the Julian Alps (NW Slovenia, NE Italy) / Fitocenološka analiza alpinskih trat s prevladujočo timijanovolistno vrbo (Salix serpillifolia) v Julijskih Alpah (...)

Dak̇skobler

2018

Folia Biologica Et Geologica

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Phytosociological analysis of alpine swards with dominant Salix serpillifolia in the Julian Alps (NW Slovenia, NE Italy) In the alpine belt of the Julian Alps (Mts. Kukova Špica, Triglav, Pihavec, Razor, Jalovec, Mangart and Lopa) we conducted a phytosociological analysis of swards on ledges, ridges and rock faces with dominant Salix serpillifolia. These sites are typically relatively moist and the snow cover there is usually very persistent, despite their location on or just below ridges. In terms of species composition the studied community is transitional between snow-bed communities of the order Arabidetalia caeruleae and communities of windward ridges from the alliance Oxytropido-Elynion that we classify into the class Elyno-Seslerietea. Based on the analysis of proportions of diagnostic species we classify the studied community into the alliance Oxytropido-Elynion and into the new eastern-Alpine association Gentiano pumilae-Salicetum serpillifoliae. In the article we also provide a slightly modified phytosociological table of another alpine community in the Julian Alps, Crepido terglouensis-Potentilletum nitidae.

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Plant Life of the Dolomites

Cited by 31 publications

References 0 publications

Light intensity affects leaf morphology in a wild population of Adenostyles alliariae (Asteraceae)

Light intensity affects leaf morphology in a wild population of Adenostyles alliariae (Asteraceae)

Cascading effects of canopy mortality drive long‐term changes in understorey diversity in temperate old‐growth forests of Europe

Phytosociological analysis of alpine swards with dominant Salix serpillifolia in the Julian Alps (NW Slovenia, NE Italy) / Fitocenološka analiza alpinskih trat s prevladujočo timijanovolistno vrbo (Salix serpillifolia) v Julijskih Alpah (...)

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