A statistical analysis of coral community responses to the 1982?83 El Ni�o in the Thousand Islands, Indonesia

Warwick, R.M.; Clarke, K.R.; Suharsono, _

doi:10.1007/bf00265008

Cited by 157 publications

(105 citation statements)

References 13 publications

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“…In the second case, data were collected from 10 transects collected before and after an El Nino induced coral bleaching event from Indonesia (Warwick et al 1990) and re-analyzed using a variety of b-diversity metrics in Anderson et al (2011). Following the bleaching event, there was a marked decrease in a-diversity (data not shown), and a large increase in b-diversity, as measured using Jaccard's dissimilarity index (Fig.…”

Section: An Illustration Of the Utility Of Null Models In Bdiversitymentioning

confidence: 99%

“…Left panels (a, b) represent data from 20 experimental ponds, ten of which were subjected to experimental drought conditions, and ten of which were controls (data from Chase 2007). Right panels (c, d) represent data from ten transects of coral species composition from off of the Tikus Islands, Indonesia (data from Warwick et al 1990) sampled prior to (1981) and following (1983) an El Niño bleaching event (modified from Anderson et al 2011).…”

Section: Acknowledgmentsmentioning

confidence: 99%

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Using null models to disentangle variation in community dissimilarity from variation in α-diversity

Chase

Kraft

Smith³

et al. 2011

Ecosphere

800

950

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Abstract. b-diversity represents the compositional variation among communities from site-to-site, linking local (a-diversity) and regional (c-diversity). Researchers often desire to compare values of bdiversity across localities or experimental treatments, and to use this comparison to infer possible mechanisms of community assembly. However, the majority of metrics used to estimate b-diversity, including most dissimilarity metrics (e.g., Jaccard's and Sørenson's dissimilarity index), can vary simply because of changes in the other two diversity components (a or c-diversity). Here, we overview the utility of taking a null model approach that allows one to discern whether variation in the measured dissimilarity among communities results more from changes in the underlying structure by which communities vary, or instead simply due to difference in a-diversity among localities or experimental treatments. We illustrate one particular approach, originally developed by Raup and Crick (1979) in the paleontological literature, which creates a re-scaled probability metric ranging from À1 to 1, indicating whether local communities are more dissimilar (approaching 1), as dissimilar (approaching 0), or less dissimilar (approaching À1), than expected by random chance. The value of this metric provides some indication of the possible underlying mechanisms of community assembly, in particular the degree to which deterministic processes create communities that deviate from those based on stochastic (null) expectations. We demonstrate the utility of this metric when compared to analyses of Jaccard's dissimilarity index with case studies from disparate empirical systems (coral reefs and freshwater ponds) that differ in the degree to which disturbance altered a-diversity, as well as the selectivity by which disturbance acted on members of the community.

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Section: An Illustration Of the Utility Of Null Models In Bdiversitymentioning

confidence: 99%

Section: Acknowledgmentsmentioning

confidence: 99%

Using null models to disentangle variation in community dissimilarity from variation in α-diversity

Chase

Kraft

Smith³

et al. 2011

Ecosphere

800

950

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“…Carribbean Sea (Roberts 1987;Williams et al 1987), Florida (Fitt et al 1993), Panama (Glynn 1983;Glynn 1988), Java Sea (Brown and Suharsono 1990;Warwick et al 1990), Great Barrier Reef (Harriott 1985). As species of corals varied remarkably in both rates of bleaching and mortality (see Table 1), they were classified into the following four categories:…”

Section: Species Of Montiporamentioning

confidence: 99%

“…In the last few decades, bleaching damage on corals has been reported in many tropical and subtropical waters of the Pacific and Atlantic Oceans; Hawaii (Jokiel and Coles 1974;Coles 1975;Jokiel and Coles 1990), Carribbean Sea (Jaap 1979;Roberts 1987;Williams et al 1987;Cook et al 1990;Gates 1990;Vicente 1990;Knowlton et al 1992;William et al 1993), Panama (Glynn 1983;Glynn 1988; Glynn and D'Croz 1990), Florida (Fitt et al 1993), California (Reyes-Bonilla 1993), Java Sea (Brown and Suharsono 1990;Warwick et al 1990;Hoeksema 1991), and Great Barrier Reef (Harriott 1985). Furthermore, wide scale severe bleaching that resulted in extensive destruction of coral reefs world-wide occurred in 1982-83 and 1986-88 during remarkably strong El Nino-Southern Oscillation (ENSO) events (Brown 1990;Brown 1997).…”

Section: Introductionmentioning

confidence: 99%

Mass destruction of the hermatypic corals during a bleaching event in Ishigaki Island, southwestern Japan

Fujioka

1999

Journal of the Japanese Coral Reef Society

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“…The species/functional groups contributing the most to dissimilarities among sites and districts were identified using the similarity percentage (SIMPER) routine (Warwick et al 1990). Multivariate analyses were run using the Primer ver.…”

Section: Statistical Analysesmentioning

confidence: 99%

Variability of ant community composition in cork oak woodlands across the Mediterranean region: implications for forest management

Verdinelli¹,

Yakhlef²,

Cossu³

et al. 2017

iForest

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We evaluated the potential use of ants as a powerful tool for environmental monitoring, together with the applicability of the functional group approach as an alternative method for studying ant communities in cork oak woodlands. Variations in ant community composition, diversity and functional groups were studied in two cork oak forested sites across the Mediterranean region. Ants were sampled using pitfall traps placed along linear transects at 12 sites located in the main cork districts of Italy and Morocco (Gallura in Sardinia, and Maâmora, east of Rabat). A total of 13,501 specimens were collected, belonging to 38 species (five shared species). A distinct separation in the NMDS plots between Gallura and Maâmora ant assemblages was clearly visible. Ant species composition was widely different between the two districts and significant differences were detected within the Gallura district at the species level. Opportunist species were well represented in Gallura (about 27% of average BrayCurtis similarity) as well as cryptic species (over 23%). In the Maâmora forest, generalized Myrmicinae, hot climate specialists and opportunists contributed equally to the average similarity (together about 53%). Multi-scale ant diversity showed that the true turnover was higher in Gallura than in Maâmora. These findings support the idea that the functional group approach, rather than species diversity per se, could be considered as a valuable tool to detect the response of the ant community to environmental changes in Mediterranean cork oak woodlands. Using ants as bioindicators could help not only in detecting early warning signs of habitat disturbance, but also in defining a useful management strategy to increase the resilience of agroforestry systems under future global change scenarios.

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A statistical analysis of coral community responses to the 1982?83 El Ni�o in the Thousand Islands, Indonesia

Cited by 157 publications

References 13 publications

Using null models to disentangle variation in community dissimilarity from variation in α-diversity

Using null models to disentangle variation in community dissimilarity from variation in α-diversity

Mass destruction of the hermatypic corals during a bleaching event in Ishigaki Island, southwestern Japan

Variability of ant community composition in cork oak woodlands across the Mediterranean region: implications for forest management

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