Quantitative floristics as a tool for the assessment of plant diversity in Tuscan forests

Chiarucci, Alessandro; Bonini, Ilaria

doi:10.1016/j.foreco.2005.03.041

Cited by 56 publications

(46 citation statements)

References 48 publications

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“…In addition, each sample plot was identified whether it was cut or not within the recent 50 years, and was located with a high precision GPS (eTrex Vista) for determining the altitude and the distances to habitations or roads (Chiarucci and Bonini 2005). The other forest site variables including slope steepness, slope direction (8 directions, N = 1, NE = 2, E = 3, ES = 4, S = 5, SW = 6, W = 7, WN = 8) and slope position (3 grades, upper = 1, middle = 2, bottom = 3) were also recorded ( Table 1, Electronic supplementary material table).…”

Section: Sampling Methodologymentioning

confidence: 99%

Plant diversity of secondary forests in response to anthropogenic disturbance levels in montane regions of northeastern China

Zhu

Man

et al. 2007

Journal of Forest Research

120

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The effects of anthropogenic disturbances on forest structure and plant diversity of secondary forest ecosystems were evaluated based on the classification by site factors in the montane regions of northeastern China. Forty-five sample plots containing 720 sub-plots of overstory species (8 m · 8 m), 1,440 quadrats of understory species (2 m · 2 m), and 1,440 quadrats of herbaceous layer species (1 m · 1 m) were clustered into five groups (G1, G2, G3, G4 and G5) by site variables with Hierarchical Cluster Analysis. Meanwhile, the disturbance levels corresponding to the five groups were determined according to the factors influencing human disturbances (D0-G2, D1-G1, D2-G3, D3-G5, and D4-G4). Species diversities of overstory, understory, herbaceous layer and overall species were evaluated using species number, Margalef index, Pielou index, Shannon-Wiener index, and Simpson index; and b-diversities (Whittaker index, Cody index). Basal area of stands exhibited a decreasing trend along the disturbance level due to a gradual increase in the extraction of timber by the human disturbances. The indices of species diversity suggested that overstory and understory species were distributed evenly among the groups or disturbance levels. There were no absolutely dominant tree species in the secondary forest ecosystems. The differences in site factors and the current disturbance intensities were not intense enough to lead to loose changes in overstory and understory species. The species diversity indices exhibited the maximum values at D3 (G5) for herbaceous layer species; this may suggest that the current disturbance intensities were intense enough to lead the changes of herbaceous layer species. Three rare and endangered species (Juglans mandshurica, Fraxinus mandshurica and Acanthopanax senticosus) were found within the secondary forests. These rare and endangered species appeared in each clustered group or disturbance level, which suggested that the current disturbance intensity in the study area was not strong enough to influence the distribution of rare and endangered species. The current disturbances in the secondary forests may not lead to a decrease in stability and complexity of the overstory and understory species, but the higher disturbance level may be intense enough to change the habitat fitness for the herbaceous species.

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Section: Sampling Methodologymentioning

confidence: 99%

Plant diversity of secondary forests in response to anthropogenic disturbance levels in montane regions of northeastern China

Zhu

Man

et al. 2007

Journal of Forest Research

120

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“…Tree species diversity is one of the most important issues to assess the diversity of a forest community and allows to easily detect relationships with stand age and other characteristics of forest structure [31]. If significant, these relationships highlight increase or decrease of the number of the ecological niches available for the different species.…”

Section: Discussionmentioning

confidence: 99%

Tree Community Ordering by Diversity Profiles: an Application to Chestnut Coppices

Mattioli¹

2014

Forest Res

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SummaryThe ecological and economical relevance of sweet chestnut (Castanea sativa Mill.) has long been related to its widespread geographical distribution and multipurpose product potential. In Italy, chestnut management represents a paradigmatic example of the potential conflict between landowner targets and tree species diversity conservation. Distinctively, the relationships between silvicultural treatment and tree species diversity of chestnut coppices are here investigated by means of diversity profiles to assess tree diversity of six stands in Central Italy. The stands were purposively selected in such a way to be characterized by the same site conditions but with different silvicultural features (age, number of thinning). Plot sampling was performed across the stands and their tree diversity was compared and ordered by means of intrinsic diversity profiles estimated from the sample data. The achieved results suggest alternative suitable options for managing chestnut coppice stands in order to enhance tree biodiversity while maintaining timber production.

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“…Queste curve sono state utilizzate per in terpretare la diversità vegetale a scala regionale in Svizzera (Koellner et al 2004) e per quantificare la diversità floristica a diverse scale spaziali nelle fore ste della Toscana (Chiarucci & Bonini 2005). Il loro utilizzo in questo lavoro, oltre che per testare l'effi cienza del campionamento (Fattorini 2007), è stato quello di rendere confrontabili aree con estensioni molto differenti.…”

Section: Analisi Comparativa Della Diversità Tra Riserveunclassified

Additive partition of diversity as standard for the selection of protected areas: the natural reserves network of the Siena province (Italy)

Marcantonio¹,

Bacaro²,

Filibeck³

et al. 2010

Forest@

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IntroduzioneL'istituzione di reti di aree protette rappresenta, ad oggi, un mezzo indispensabile per la conservazione della biodiversità (Battisti 2004, Bonn & Gaston 2005. La selezione di nuove aree protette da destina re alla conservazione delle risorse naturali, richiede l'uso di strategie scientificamente valide, soprattutto per fornire una concreta protezione della biodiversi Forest@ 7: 28-43 (2010) , Scoppola A, Nonis D, Gasparini P, Rocchini D, Santi E, Landi S, Maccherini S, Chiarucci A(1) BIOCONNET, Biodiversity and Conservation Network, Dip.to di Scienze Ambientali "G. Sarfatti" Università di Siena, v. Mattioli 4,; (2) Abstract: Additive partition of diversity as standard for the selection of protected areas: the natural reserves network of the Siena province (Italy).Estimating the effects of the spatial components on species diversity represents an important step to establish the conservation "capacity" in a network of protected areas. A clear evaluation on how α, β, and γ diversity are partitioned among and within spatial (and temporal) scales can help us to drive managing decisions and provide methods for monitoring species diversity. Moving from these concepts, a probabilistic sample was applied here: (1) for quantifying plant species diversity at different spatial scales within the network of protected areas existing in the Siena Province (Central Italy); and (2) to evaluate the ef fects on the species diversity of the whole network due to the addition of two new protected areas (Ripa d'Orcia and Bogatto). Focusing on both common species and those defined as "focal" (included in regional, national or continental "red" lists), our results indicated that species richness of the protected areas differed each other independently from the sampling efforts. Diversity partitioning indicated that most of the diversi ty within the network is due to larger-scale β-diversity, i.e., the differences in species composition among re serves. Moreover, total β-diversity was decomposed into two components: β area (due to the differences in area among reserves) and β replacement (due to the compositional differences across protected areas). β area was particularly important for all species, while β replacement was the most important factor for the set of focal spe cies. Noteworthy, the analyzed variation in diversity components due to the inclusion of the two new natu ral reserves into the network (Ripa d'Orcia and Bogatto) resulted in a proportional increase in β Area for the whole network, and, on the other hand, in a reduction for β replacement diversity component. Based on these quantitative results, criteria for the selection and the inclusion of protected areas in existing networks of na tural reserves (such as the Natura 2000 Network) can be achieved.Keywords: Additive partitioning, Conservation biology, Focal species, Plant diversity, Reserve selection, Siena provinceReceived: Sep 14, 2009; Accepted: Feb 11, 2010 Citation: Marcantonio M, Bacaro G, Filibeck G, Scoppola A, Nonis D, Gasparini P, Rocchin...

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Quantitative floristics as a tool for the assessment of plant diversity in Tuscan forests

Cited by 56 publications

References 48 publications

Plant diversity of secondary forests in response to anthropogenic disturbance levels in montane regions of northeastern China

Plant diversity of secondary forests in response to anthropogenic disturbance levels in montane regions of northeastern China

Tree Community Ordering by Diversity Profiles: an Application to Chestnut Coppices

Additive partition of diversity as standard for the selection of protected areas: the natural reserves network of the Siena province (Italy)

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