A biogeographical evaluation of high-elevation myxomycete assemblages in the northern Neotropics

Rojas, Carlos; Stephenson, Steven L.; Valverde, Randall; Estrada–Torres, Arturo

doi:10.1016/j.funeco.2011.06.005

Cited by 13 publications

(5 citation statements)

References 28 publications

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“…As in fungal endophytes (Langenfeld et al ., ), soil protist assemblages (Foissner, ; Bates et al ., ), and marine ciliates (Stock et al ., ), geographical location best explains the differences in assemblage composition. A biogeographical study of myxomycetes that focused only on tropical highland forests found a similar pattern: a cluster analysis separated myxomycete assemblages recorded from Thailand from those of the Americas (Rojas et al ., ). Although elevation determined habitat availability (Rojas et al ., ; Dagamac et al ., ) and forest types (Novozhilov et al ., ; Rojas et al ., ), the high overlap of species composition between assemblages of lowland and highland areas showed that myxomycetes seem to find in both elevations suitable microhabitats for fruiting.…”

Section: Discussionmentioning

confidence: 97%

Biogeographical assessment of myxomycete assemblages from Neotropical and Asian Palaeotropical forests

Dagamac

Novozhilov

Stephenson

et al. 2017

Journal of Biogeography

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Aim Lowland/highland and Neotropical/Asian Palaeotropical assemblages of myxomycetes were compared to test the null hypothesis that neither species diversity nor species composition differs between the two ecoregions. This can be expected if myxomycetes behave as ubiquists and are capable of unlimited long distance dispersal. Location Four pairs (lowland/highland) of comprehensive regional surveys encompassing c. 7500 specimens were compared; these represented Neotropical (Yasuni/Maquipucuna in Ecuador; Guanacaste/Monteverde in Costa Rica) and Asian Palaeotropical forests (Cat Tien/Bi Dup Nui Ba in Vietnam; Chiang Mai in Thailand/South Luzon in the Philippines). Methods Each survey was carried out in an area characterized by relatively homogenous vegetation consisting of natural or near‐natural forests, and incorporated both field collecting and the use of moist chamber cultures, and all observed fructifications were recorded. Analyses of diversity (i.e. richness) and community composition were carried out with EstimateS and R. Results Between 400 and 2500 records per survey were obtained. Species accumulation curves indicated moderate to nearly exhaustive completeness (70–94% of expected species richness recorded). Multivariate analyses suggest that geographical separation (Neotropic versus Palaeotropic) explained the observed differences in composition of myxomycete assemblages better than habitat differences (lowland versus highland forests). Main Conclusion Both geographically restricted morphospecies and differences in myxomycete assemblages provide evidence that myxomycetes are not ubiquists but tend to follow the moderate endemicity hypothesis of protist biogeography.

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Section: Discussionmentioning

confidence: 97%

Biogeographical assessment of myxomycete assemblages from Neotropical and Asian Palaeotropical forests

Dagamac

Novozhilov

Stephenson

et al. 2017

Journal of Biogeography

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“…In addition, the taxonomic diversity index (TDI) (number of species/number of genera) was calculated for the overall data set. Also, beta diversity analyses were performed for the comparisons among transects and across elevation categories with hierarchical cluster analyses using Bray–Curtis distances as suggested by Rojas et al (2012). In all these cases, the software PAST, v. 3.09 (Hammer et al 2001) was used.…”

Section: Methodsmentioning

confidence: 99%

Does elevation influence the distributional patterns of tropical myxomycetes? A case study in Costa Rica

2016

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In order to test the hypothesis that elevation may be an important factor accounting for the distribution of myxomycetes in tropical forests, this project was designed and conducted in Costa Rica. Two lower elevational belts were selected for this work due to their floristic and structural resemblance. Using the moist chamber technique, 40 different sites located in four different transects in two different macroclimatic regions were surveyed using three substrates during the rainy and the dry periods of 2014 and 2015. The results showed a lack of differences in diversity-based estimators according to elevation using different approaches and taxonomic differences were found across transects, collecting periods and substrates but not in relation with elevation either. Our results suggest that when increased spatial sampling resolution is implemented and floristic elements are common, elevation may not be as important of a factor in shaping the distribution of myxomycetes in tropical forests as commonly believed.

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“…In spite of the former constraint, in recent years several authors have provided evidence to explain the distribution of myxomycetes at large scales under a type of moderate endemicity model (Stephenson et al 2008, Rojas et al 2011b). However, before meaningful distributional patterns can be constructed using the techniques of computational biology, still more field-based information on the occurrence of species in different parts of the world is needed.…”

Section: Introductionmentioning

confidence: 99%

New additions to the myxobiota of Peru

Rojas¹

2011

Mycosphere

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Recent efforts to study myxomycetes in many areas of the world have resulted in a considerable increase in the number and quality of regional species lists, especially during the last decade. However, in South America certain countries such as Peru continue to be highly understudied with respect to this group of organisms. During a series of surveys carried out in 2007 in several different areas of Peru, 49 species of myxomycetes not previously known for this country were recorded. Basic ecological information was also collected and analyzed in the context of available data on myxomycetes for the Neotropics. With the new species reported herein, the myxobiota of Peru is increased to 80 species, which is still a low number when the natural and biogeographical characteristics of Peruvian landscapes are considered.

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A biogeographical evaluation of high-elevation myxomycete assemblages in the northern Neotropics

Cited by 13 publications

References 28 publications

Biogeographical assessment of myxomycete assemblages from Neotropical and Asian Palaeotropical forests

Biogeographical assessment of myxomycete assemblages from Neotropical and Asian Palaeotropical forests

Does elevation influence the distributional patterns of tropical myxomycetes? A case study in Costa Rica

New additions to the myxobiota of Peru

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