An evaluation of different diameter diversity indices based on criteria related to forest management planning

Lexerød, Nils L.; Eid, Tron

doi:10.1016/j.foreco.2005.10.046

Cited by 198 publications

(193 citation statements)

References 35 publications

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“…1a,b) and its shift from 2000 to 2012. This observation is in accordance with Lexerød and Eid (2006), who showed the highest discriminant ability and best logical ranking for the Gini index. Also Valbuena et al (2012) pointed out a certain inconsistency of diversity indices when comparing forest structural types and recommended measures of equitability of tree sizes.…”

Section: Discussionsupporting

confidence: 91%

“…An additional advantage of these three selected indices is that the index value does not change when the density of each diameter class is raised in the same proportion. This makes it possible to compare diameter diversity in different stands or in one stand over time, independently of the stand density (Lexerød, Eid 2006). Indices ranging between 0 and 1 are also easy to interpret and allow a quick comparison between each other.…”

Section: Discussionmentioning

confidence: 99%

“…The Gini coefficient quantifies the deviation from perfect equality, and has a minimum value of zero, when all trees are of equal size, and a theoretical maximum of one in an infinite population in which all trees except one have a value of zero (Lexerød, Eid 2006).…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

On the way to continuous cover forest at middle elevations - the question of forest structure and specific site characteristics

Bílek¹,

Remeš²,

Švec³

et al. 2013

J. For. Sci.

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ABSTRACT:The transformation process of even-aged forest stands to irregular forest stands on waterlogged sites after 20 years effort was analysed. Data from two 1-ha PRP was analysed with special focus on structural (Shannon Evenness Index, Simpson Index and Gini Index) and species (Shannon Evenness Index and Simpson Index) diversity. Different development on study plots confirmed that the highest structural diversity is not often compatible with the concept of species diversity. On PRP 1 high diameter differentiation has led to lower values of species diversity, while on PRP 2 rather moderate diameter differentiation supported higher species diversity in lower DBH classes. The Gini Index was confirmed to be the best indicator for monitoring the diameter differentiation in the course of stand transformation.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

On the way to continuous cover forest at middle elevations - the question of forest structure and specific site characteristics

Bílek¹,

Remeš²,

Švec³

et al. 2013

J. For. Sci.

View full text Add to dashboard Cite

show abstract

“…DBH) (Lexerød, Eid 2006;Sterba 2008;Zenner et al 2015). It can take values in the range of GI Î (0, 1), wherein the low values indicate that the trees are characterised by, for example, a diameter close to the mean (little variation in the characteristic), whilst higher values indicate greater GI diversity in the population's analysed characteristics.…”

Section: Methodsmentioning

confidence: 99%

Structural diversity of selected oak stands (Quercus roburL.) on the Krotoszyn Plateau in Poland

Szmyt

2017

Forest Research Papers

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Abstract. The oak forests growing on the Krotoszyn Plateau are the biggest and most valuable oak forest complexes in Poland. The purpose of this study was to analyze the structural diversity of oak (Q. robur l.) stands older than 140 years. two natural stands located within the forest reserve as well as two managed stands were chosen for investigation. Species and tree size diversity were analyzed using different measures and spatially explicit and inexplicit indices. The results indicate that the structural diversity of the protected oak forests did not differ significantly from that of managed stands. On the contrary, undisturbed natural processes in protected forests can result in a low diversity of some structural attributes in such stands. Although most indices pointed towards a higher structural diversity in protected forests, the differences were not large, especially in the case of spatially explicit indices. The spatial arrangement of live trees was either random, aggregated or regular, with the latter clearly dominating managed, poorly mixed oak stands. Furthermore, a lack of natural disturbances strong hornbeam expansion, in which case strict protection is not favorable for oak sustainability as it creates unsuitable conditions for oak regeneration beneath the hornbeam canopy.

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“…Compared with other measures of stand structure diversity, the two stand structural diversity indexes described above offer many advantages, among which are their ease of calculation and wide usage, an important requisite for adoption by practitioners (Latham et al 1998, Schulte & Buongiorno 1998, Lexerød & Eid 2006.…”

Section: Measurementioning

confidence: 99%

Assessment of hedge stand types as determinants of woody species richness in rural field margins

Sitzia¹,

Trentanovi²,

Marini³

et al. 2013

iForest

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The woody component along field edges often provides the only permanent elements of structural and biological diversity in landscapes that have lost much of their naturalness to agriculture and urban use. The main aims of this study were (i) to investigate how four hedge stand types, i.e., systems of management distinguished on the basis of the natural and managed growth forms of trees and shrubs (low single-storied, high single-storied, two-storied and multi-storied), differ in their biometric parameters and (ii) to identify the primary management-related determinants of native woody species richness. The study used a large dataset of hedgerows (n=538) sampled in seven sites in Northern Italy. The four hedge stand types exhibited highly significant differences in size and biometric parameters. The multi-storied hedges, associated with the highest stand structural diversity index values, supported the highest number of tree species, followed by high single-storied hedges. The low single-storied hedge stand type contained the lowest number of species. We found a positive effect of hedge area as well as a marginal negative effect of basal area on native woody species richness. The management implications addressed by our study include conversion of single-storied into two- or multi-storied types, increasing hedge size and controlling hedge stand basal area

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An evaluation of different diameter diversity indices based on criteria related to forest management planning

Cited by 198 publications

References 35 publications

On the way to continuous cover forest at middle elevations - the question of forest structure and specific site characteristics

On the way to continuous cover forest at middle elevations - the question of forest structure and specific site characteristics

Structural diversity of selected oak stands (Quercus roburL.) on the Krotoszyn Plateau in Poland

Assessment of hedge stand types as determinants of woody species richness in rural field margins

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