Explaining disjunct distributions in the flora of southern South America: evolutionary history and biogeography of <i>Myrceugenia</i> (Myrtaceae)

Murillo‐A., José; Stuessy, Tod F.; Ruíz, Eduardo

doi:10.1111/jbi.12702

Cited by 25 publications

(14 citation statements)

References 66 publications

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“…On the other hand, an important component of the southern flora and/or cloud forest of eastern Brazil have migrated from the Andes (Rambo, 1951;Safford, 2007). This pattern is shared by Fuchsia, Ericaceae, Drimys, Berberis, Myrceugenia, among others (references in Safford, 2007;Fiaschi & Pirani, 2009;Murillo-A et al, 2016). Although dispersions from Andes to eastern Brazil have been noticed across several groups, the opposite dispersal route, as observed in Leandra s.str., is less frequent.…”

Section: Discussionmentioning

confidence: 92%

“…It is believed that in many cases such patterns are the result of dispersal events, rather than fragmentation of a wider distribution, but some cases may be explained by vicariance (reviewed in Fiaschi & Pirani, 2009). Disjunctions between the Atlantic Forest and the Amazon are the most emphasized in the literature (Mori et al, 1981;Costa, 2003;Fouquet et al, 2012;Batalha-Filho et al, 2013;Sobral-Souza et al, 2015;Ledo & Colli, 2017), while few studies have investigated the other patterns (Perret et al, 2006;Fritsch et al, 2015;Murillo-A et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Pleistocene range expansions might explain striking disjunctions between eastern Brazil, Andes and Mesoamerica inLeandras.str. (Melastomataceae)

Reginato

Michelangeli

2019

J of Sytematics Evolution

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Leandra s.str. clade has around 200 species nearly restricted to eastern Brazil. Most species in this group are narrow endemics, but a few present striking disjunct distributions between eastern Brazil and Andes or Mesoamerica. Given the predominantly “montane” distribution observed in most Leandra s.str., we hypothesized that cyclical range expansions during colder Pleistocene periods, followed by local extinctions during warmer interglacial periods, could have shaped the distribution of the disjunct species in this clade. In order to gather support for this biogeographical scenario in a phylogenetic framework, the species that occur outside eastern Brazil were identified, ages of the dispersal events estimated, climatic niche models for the disjuncts were generated, and the climatic envelope of these species compared. Our results place all dispersal events from eastern Brazil to Andes or Mesoamerica during the Pleistocene. Climatic niche modeling indicates a potential range expansion during the Pleistocene colder times for the disjunct species. Although the surpassing of the “dry diagonal” could have been facilitated during glacial periods, this open corridor is an effective barrier for Leandra, given the reduced number of species that dispersed beyond an eastern Brazilian origin. Additionally, the disjunct species do not present significant differences in their climatic envelopes to the non‐disjunct species. Our results provide support to a short‐dispersion/stepping‐stone migration scenario to account for the observed disjunctions in this clade. Range expansions during Pleistocene colder periods followed by local extinctions during interglacial periods could have shaped the distribution of Leandra s.str.

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Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Pleistocene range expansions might explain striking disjunctions between eastern Brazil, Andes and Mesoamerica inLeandras.str. (Melastomataceae)

Reginato

Michelangeli

2019

J of Sytematics Evolution

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“…Ferreira et al 2016;Silva et al 2017). About half of all Myrceugenia species that occur in Brazil are found in araucaria forests in Santa Catarina State , reinforcing the role of these forests as a center of endemism for this genus (Landrum 1981;Murillo-A et al 2016). The tree fern D. sellowiana, like A. angustifolia, is frequently abundant in araucaria forests at high altitudes (Meyer et al 2013;Sehnem 1978) and sometimes forms monodominant communities (Gasper et al 2011).…”

Section: Discussionmentioning

confidence: 99%

Species diversity, community structure and ecological traits of trees in an upper montane forest, southern Brazil

et al. 2019

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Upper montane ecosystems in Brazil are little known, and their structural and functional aspects poorly understood. Our goals were to describe tree species diversity and community structure, and to characterize tree species in relation to their ecological traits, phytogeographic history and conservation status in an upper montane araucaria forest remnant. A total of 26 species belonging to 18 families were found in a 1-hectare permanent plot. The tree community mainly comprised trees with diameters of less than 20 cm and heights of between 6.5 and 9.5 m. Drimys angustifolia and Myrceugenia regnelliana had the highest importance values. Most species were shade tolerant while most individuals were pioneers. Most species and individuals presented zoophily and zoochory. Most sampled species and individuals were related to araucaria forests. Seven species are threatened to some degree while one species, Crinodendron brasiliensis, besides threatened, is also endemic to the region. The presence of endemic and endangered species demonstrates that the studied area serves important conservation purposes. Furthermore, the present study demonstrates the important role that upper montane regions have for conservation and describes the structural patterns of still poorly studied habitats, reinforcing the importance such systems have in maintaining species diversity at high elevations.

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“…Berg., Gunnera L., Escallonia Mutis ex L. f., and Schizolobium parahyba (Vell.) S. F. Blake (Landrum, 1981; Margis et al, 2011; Zorzanelli et al, 2016; Murillo-A, Stuessy & Ruiz, 2016). …”

Section: Discussionmentioning

confidence: 99%

Herbarium-based studies on taxonomy, biogeography and ecology ofPsilochilus(Orchidaceae)

Kolanowska

Naczk

Jaskuła

2016

PeerJ

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BackgroundPsilochilus is a poorly studied orchid genus distributed from southern Mexico to south-eastern Brazil. A taxonomic revision of this Neotropical endemic based on morphological data is presented.Material and MethodsOver 170 dried herbarium specimens and flowers preserved in liquid of Psilochilus were analyzed. Morphological variation among examined taxa was described based on multivariate analysis. To evaluate the similarity between niches occupied by various Psilochilus species ecological niche modeling (ENM) was applied. Species richness and the distribution patterns of Psilochilus representatives were analyzed based on squares of 5° latitude and longitude while similarities among floras between biogeographical units were measured using the Bray-Curtis index for presence/absence data.Results and DiscussionA new species of the P. physurifolius-complex is described based on Central American material. Psilochilus crenatifolius is reduced to the rank of variety as P. macrophyllus var. crenatifolius. A key to 18 accepted Psilochilus species is provided. The illustrations of perianth segments of all recognized taxa are presented. The climatic niches preferred by the particular Psilochilus representatives are well separated based on ecological niche modeling analysis. Their distribution is limited mainly by the isothermality and temperature seasonality. The highest Psilochilus species richness is observed in the North Andean, Panamanian, Brazilian Planalto and Central American biogeographical provinces. A high level of endemism is observed in all those regions as well as Yungas biogeographical province. Most Psilochilus species occur in areas above 800 m of elevation. The populations were most often reported from the tropical rain forest and tropical moist deciduous forest.

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Explaining disjunct distributions in the flora of southern South America: evolutionary history and biogeography of Myrceugenia (Myrtaceae)

Cited by 25 publications

References 66 publications

Pleistocene range expansions might explain striking disjunctions between eastern Brazil, Andes and Mesoamerica inLeandras.str. (Melastomataceae)

Pleistocene range expansions might explain striking disjunctions between eastern Brazil, Andes and Mesoamerica inLeandras.str. (Melastomataceae)

Species diversity, community structure and ecological traits of trees in an upper montane forest, southern Brazil

Herbarium-based studies on taxonomy, biogeography and ecology ofPsilochilus(Orchidaceae)

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