SAM: a comprehensive application for Spatial Analysis in Macroecology

Rangel, Thiago F.; Diniz‐Filho, José Alexandre Felizola; Bini, Luis Maurício

doi:10.1111/j.1600-0587.2009.06299.x

Cited by 1,070 publications

(785 citation statements)

References 22 publications

(25 reference statements)

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“…Significance was tested for each distance class using 999 random permutations, and it was established using the Bonferroni correction for multiple comparisons, P=0.05/5 distance classes =0.0125. This analysis used the software SAM (Spatial Analysis in Macroecology) developed by Rangel et al (2010).…”

Section: Data Collection and Analysismentioning

confidence: 99%

Spatial distribution of fish assemblages along environmental gradients in the temporary ponds of Northern Pantanal, Brazil

et al. 2013

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Section: Data Collection and Analysismentioning

confidence: 99%

Spatial distribution of fish assemblages along environmental gradients in the temporary ponds of Northern Pantanal, Brazil

et al. 2013

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“…As Moran's I showed very low values in the first (I = -0.033) and last distance classes (I = 0.014), we followed up with the standard simple linear regression analysis to test the abundance-suitability relationship. Spatial autocorrelation analysis and linear regression were performed using SAM 4.0 (Rangel et al 2010).…”

Section: Abundance and Environmental Suitability Data For Anoura Caudmentioning

confidence: 99%

Does environmental suitability explain the relative abundance of the tailed tailless bat, Anoura caudifer?

Weber¹,

Grelle²

2012

NatCon

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Ecological niche modeling (ENM) can be used to find areas of high environmental suitability, which are used as a surrogate of abundance's estimation. However, the relationship between environmental suitability and local abundance has been rarely tested. In this study we tested this relationship for the nectar-feeding bat Anoura caudifer. We ran an ENM using Maxent with 235 presence records and seven environmental variables to obtain suitability values, gathering relative abundance data for 24 sites from published studies. We found a very strong relationship between abundance and suitability for A. caudifer, with suitability predicting 64% of the spatial variation of abundance. When ENM is correlated with spatial variation of abundance, it can be used as a proxy to forecast the impact of changing climate on abundance. We suggest that the positive relationship found for this common species may be applied to rare nectarivore bat species, helping to guide new surveys and to find unknown populations.

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“…The effects of the spatial autocorrelation on diversity and evenness were inferred based on Moranʼs I results for species richness and abundance since such index are originated from simultaneous association of the richness and abundance. The Moranʼs I analysis was performed using the software SAM V.4.0 (Rangel et al, 2010).…”

Section: Methodsmentioning

confidence: 99%

Assemblage of immature Odonata (Insecta, Anisoptera) in streams of the Mato Grosso do Sul State: spatial implications

Soares

Batista-Silva

Boneto

et al. 2015

Iheringia, Sér. Zool.

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ABSTRACT. This study investigated the assemblages attributes (composition, abundance, richness, diversity and evenness) and the most representative genera of Odonata, Anisoptera at Água Boa and Perobão Streams, Iguatemi River basin, Brazil. Both are first order streams with similar length that are impacted by riparian forest removal and silting. Quarterly samplings were conducted from March to December 2008 in the upper, intermediate and lower stretch of each stream. The Mantel test was used to check the influence of spatial autocorrelation on the Odonata composition. Spatial variations in the composition were summarized by the Principal Coordinates Analysis (PCoA) using Mantel test residuals. The effects of spatial correlation on richness and abundance were investigated by the spatial correlogram of Moranʼs I coefficients. The most representative genera in each stream were identified by the Indicator Value Method. The spatial variations in the attributes of the assemblages were assessed using analysis of variance of null models. We collected 500 immature individuals of 23 genera and three families. Among the attributes analyzed only the composition and abundance showed significant spatial differences, with the highest mean abundance found in the Perobão Stream. Miathyria and Zenithoptera were the indicator genera of the Água Boa Stream and Erythrodiplax, Libellula, Macrothemis, Progomphus and Tramea were the indicator genera of the Perobão Stream. KEYWORDS.Aquatic invertebrates, Iguatemi River basin, lotic environments, odonatofauna.RESUMO. Assembleia de imaturos de Odonata (Insecta, Anisoptera) em riachos sul-matogrossenses: implicações espaciais. Este trabalho investigou atributos de assembleias (composição, abundância, riqueza, diversidade e equitabilidade) e os gêneros mais representativos de Odonata, Anisoptera nos riachos Água Boa e Perobão, bacia do rio Iguatemi, MS, Brasil. Os riachos são de primeira ordem, apresentam extensão similar e são impactados pela remoção da mata ripária e assoreamento. As amostragens foram realizadas trimestralmente de março a dezembro/2008 nos trechos superior, intermediário e inferior de ambos os riachos. O teste de Mantel foi utilizado para verificar a influência da autocorrelação espacial sobre a composição de Odonata. Variações espaciais na composição foram sumarizadas através da Análise de Coordenadas Principais (PCoA) utilizando-se os resíduos do teste de Mantel. Os efeitos da correlação espacial na riqueza e abundância foram investigados através do correlograma espacial dos coeficientes do I de Moran. Para identificar os gêneros mais representativos em cada riacho foi utilizado o Método do Valor Indicador. As variações espaciais dos atributos das assembleias foram avaliadas por meio de análises de variância de modelos nulos. Foram coletados 500 indivíduos imaturos distribuídos em 23 gêneros e três famílias. Dentre os atributos analisados, apenas a composição e abundância apresentaram diferenças espaciais significativas, sendo o maior valor médio do último atributo regi...

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SAM: a comprehensive application for Spatial Analysis in Macroecology

Cited by 1,070 publications

References 22 publications

Spatial distribution of fish assemblages along environmental gradients in the temporary ponds of Northern Pantanal, Brazil

Spatial distribution of fish assemblages along environmental gradients in the temporary ponds of Northern Pantanal, Brazil

Does environmental suitability explain the relative abundance of the tailed tailless bat, Anoura caudifer?

Assemblage of immature Odonata (Insecta, Anisoptera) in streams of the Mato Grosso do Sul State: spatial implications

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