A multiple-site similarity measure

Diserud, Ola Håvard; Ødegaard, Frode

doi:10.1098/rsbl.2006.0553

Cited by 139 publications

(157 citation statements)

References 21 publications

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“…For a given number of sites T, C T S decreases with increasing number of "rare" species (i.e., species observed in only one or a few sites). Conversely, C T S increases with the increasing number of species observed in several sites (Diserud & Ødegaard 2007).…”

Section: Methodsmentioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

“…The expected frequencies are those that we would hope to fi nd if the null hypothesis (H o = 0) is true, given the total number of observations (Zar 1999). The level of similarity between the seven sites sampled, based on presence of galls, was calculated using a multiplesite similarity measure (range = 0-1), according with Diserud & Ødegaard (2007):Where a i is the number of species in site A i , i = 1, …., T; a ij is the number of species shared by sites A i and A j and a ikj is the number of species shared by the sites Ai, A j and A k , etc. Multiple-site similarity measures provide a more relevant index for a species' spatial distribution.…”

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confidence: 99%

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The importance of beta diversity in local gall-inducing arthropod distribution

Medianero¹,

Ibáñez²,

Nieves‐Aldrey³

2010

Neotrop. entomol.

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-Many studies over the past twenty years have documented the richness of arthropod galling species around the world, and some have proposed hypotheses to explain local and global patterns of galling species richness. However, few studies have been directed toward understanding how the gall-inducing species are locally distributed. The aim of this study was to determine the distribution of gall-inducing arthropods species at Coiba National Park, a tropical habitat on the Pacifi c coast of Panama. Our results suggest that more gall-inducing species had an aggregated distribution, and gall-inducing arthropod diversity shows a strong beta diversity component. Geographic distance was not correlated with similarity in gall-inducing species composition between the studied sites. This fact has important implications when trying to estimate gall-inducing arthropod richness and general patterns, and could cause contradictory results for hypotheses that attempt to explain the local and global patterns of galling species richness.KEY WORDS: Coiba Island, geographic distribution, Panama, plant communityThe induction of plant gall is the result of a complex association between insects and plants (Shorthouse et al 2005). Galls represent a complex series of interactions between the tissues of a plant and another living organism, more frequently an insect. The understanding of these interactions involves studies in many scientifi c fi elds, from systematics to ecology, but also morphology, physiology, biological control, evolutionary biology or agricultural and forest entomology (Mani 1964. Gallinducing species are excellent models for ecological studies due to their abundance, diversity and sessile habit, which make them easier to census than free-feeding herbivores and thus allowing species diversity comparisons among different habitats (Fernandes & Price 1988).During the past twenty years, many studies have documented galling insect lists and galling species richness around the world (see Veldtman & McGeoch 2003. There are also data regarding factors that affect local and regional gall richness and thus infer global patterns in local number of insect galling species . However, few studies have been directed toward understanding how the gall-inducing species are locally distributed. Understanding spatial patterns of species distribution is a crucial topic in ecology and conservation biology; for instance, when predicting species richness from local to regional scales (Gering & Crist 2002). An important problem when comparing studies of gallinducing arthropods richness is the use of different sampling methods (Dalbem & Mendonça 2006). But, independent of sampling methods, one result that remains consistent across all studies is that local distribution of gall-inducing arthropods shows low similarity between the sampled sites (see Blanche & Westoby 1996, Gonçalves-Alvin & Fernandes 2001, Cuevas-Reyes et al 2003, Medianero et al 2003. This low similarity between the sampled sites has important implications when trying t...

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Section: Methodsmentioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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The importance of beta diversity in local gall-inducing arthropod distribution

Medianero¹,

Ibáñez²,

Nieves‐Aldrey³

2010

Neotrop. entomol.

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“…For example, Jaccard's (1900) similarity index is z 2 /(2z 1 Ϫ z 2 ), and Sørensen's (1948) index is z 2 /z 1 . For multiple-assemblage similarity metrics, Koch's (1957) index of dispersity (i.e., taxonomic homogeneity) is (z 1 /S n Ϫ 1/n)/(1 Ϫ 1/n), and Diserud and Ødegaard's (2007) index is (n Ϫ S n /z 1 )/(n Ϫ 1). Clearly, pairwise indices are a combination of z 1 and z 2 only and do not consider higher-order z components (z i where i ≥ 3).…”

Section: Occupancy Frequency Distributionsmentioning

confidence: 99%

“…The few existing multiple-assemblage, incidence-based measures have shortcomings (Koch 1957;Diserud and Ødegaard 2007). These include (1) inference problems as a consequence of averaging nonindependent pairwise val- With an increase in number of samples, the number of unknown species gradually declines to S ϱ Ϫ S n .…”

Section: Introductionmentioning

confidence: 99%

Zeta Diversity as a Concept and Metric That Unifies Incidence-Based Biodiversity Patterns

Hui

McGeoch

2014

The American Naturalist

143

261

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Online enhancements: appendix, zip file. abstract: Patterns in species incidence and compositional turnover are central to understanding what drives biodiversity. Here we propose zeta (z) diversity, the number of species shared by multiple assemblages, as a concept and metric that unifies incidence-based diversity measures, patterns, and relationships. Unlike other measures of species compositional turnover, zeta diversity partitioning quantifies the complete set of diversity components for multiple assemblages, comprehensively representing the spatial structure of multispecies distributions. To illustrate the application and ecological value of zeta diversity, we show how it scales with sample number, grain, and distance. Zeta diversity reconciles several different biodiversity patterns, including the species accumulation curve, the species-area relationship, multispecies occupancy patterns, and scaling of species endemism. Exponential and power-law forms of zeta diversity are associated with stochastic versus niche assembly processes. Zeta diversity may provide new insights on biodiversity patterns, the processes driving them, and their response to environmental change.

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A comparative analysis reveals weak relationships between ecological factors and beta diversity of stream insect metacommunities at two spatial levels

Heino

Melo

Bini

et al. 2015

Ecology and Evolution

171

148

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The hypotheses that beta diversity should increase with decreasing latitude and increase with spatial extent of a region have rarely been tested based on a comparative analysis of multiple datasets, and no such study has focused on stream insects. We first assessed how well variability in beta diversity of stream insect metacommunities is predicted by insect group, latitude, spatial extent, altitudinal range, and dataset properties across multiple drainage basins throughout the world. Second, we assessed the relative roles of environmental and spatial factors in driving variation in assemblage composition within each drainage basin. Our analyses were based on a dataset of 95 stream insect metacommunities from 31 drainage basins distributed around the world. We used dissimilarity-based indices to quantify beta diversity for each metacommunity and, subsequently, regressed beta diversity on insect group, latitude, spatial extent, altitudinal range, and dataset properties (e.g., number of sites and percentage of presences). Within each metacommunity, we used a combination of spatial eigenfunction analyses and partial redundancy analysis to partition variation in assemblage structure into environmental, shared, spatial, and unexplained fractions. We found that dataset properties were more important predictors of beta diversity than ecological and geographical factors across multiple drainage basins. In the within-basin analyses, environmental and spatial variables were generally poor predictors of variation in assemblage composition. Our results revealed deviation from general biodiversity patterns because beta diversity did not show the expected decreasing trend with latitude. Our results also call for reconsideration of just how predictable stream assemblages are along ecological gradients, with implications for environmental assessment and conservation decisions. Our findings may also be applicable to other dynamic systems where predictability is low.

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A multiple-site similarity measure

Cited by 139 publications

References 21 publications

The importance of beta diversity in local gall-inducing arthropod distribution

The importance of beta diversity in local gall-inducing arthropod distribution

Zeta Diversity as a Concept and Metric That Unifies Incidence-Based Biodiversity Patterns

A comparative analysis reveals weak relationships between ecological factors and beta diversity of stream insect metacommunities at two spatial levels

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