Conservation assessment of an extremely restricted bromeliad highlights the need for population-based conservation on granitic inselbergs of the Brazilian Atlantic Forest

Hmeljevski, Karina Vanessa; Freitas, Leandro; Domingues, R.; Pereira, Alba Regina; Cancio, Aline S; Andrade, Antônio Carlos Silva de; Machado, M. A.; Viccini, Lyderson Facio; Forzza, Rafaela Campostrini

doi:10.1016/j.flora.2014.03.004

Cited by 19 publications

(17 citation statements)

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“…Genetic differentiation related to landscapes was also reported for many other species within a wider habitat range. Some of landscape features which may act as geographic barriers are rivers (Moreira 2015) and cliffs (Cursach et al 2012;Garfi et al 2013;Hmeljevski et al 2014;Agullo et al 2015). For example, in Saxifraga aizoides, large spatial gaps existed between small remnant populations within regions, resulted in the considerable genetic differentiation (Lutz et al 2000).…”

Section: Genetic Differentiation Of Sandalwoodmentioning

confidence: 99%

“…Furthermore, the transformation history of landscapes (Craft and Ashley 2007;Schmidt et al 2009;Garfi et al 2013;Moreira et al 2015) and the human activities (Warburton et al 2000;Kettle et al 2007;Agullo et al 2015), as well as the occurrence of physical barriers i.e. mountains, cliffs or oceans (Byrne et al 2003;Bottin et al 2007;Craft and Ashley 2007;Rao et al 2007;Dani et al 2011;Cursach et al 2012;Hmeljevski et al 2014), may cause habitat isolation which restrict gene flow and lead to the genetic structuring. Recent genetic differentiation may also be caused by drift and gene flow in the past (Lutz et al 2000).…”

Section: Introductionmentioning

confidence: 99%

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Gene flow and selection evidence of sandalwood (Santalum album) under various population structures in Gunung Sewu (Java, Indonesia), and its effects on genetic differentiation

et al. 2017

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Ratnaningrum YWN, Indrioko S, Faridah E, Syahbudin A. 2017. Gene flow and selection evidence of sandalwood (Santalum album) under various population structures in Gunung Sewu (Java, Indonesia), and its effects on genetic differentiation. Biodiversitas 18: 1493-1505. Field observations on population structures and isoenzyme analysis were conducted to determine gene flow and selection evidence of sandalwood under various population structures in Gunung Sewu, and its effects on genetic differentiation. Sandalwood (Santalum album Linn., Santalaceae) is origin to the south-eastern islands but recently emerged as new landraces in Java Island, Indonesia. Results suggested that (i) natural barriers contributed to habitat fragmentation and disrupted gene flow among populations; (ii) gene flow affected selection processes regarding bottleneck effects and genetic drifts, which determined allelic richness and population diversity; and (iii) variation on gene flow and selection processes affected genetic differentiation among populations. Gene flow restriction and genetic drift occurred when population had lower genetic base, highly clonalized, fragmented, and/or more inbreeding in mating. Genetic differentiation was highest between populations within Timor island, and between Gunung Sewu (Java Island) and Sumba-Timor islands. Populations were not clustered based on geographical sites, but more by the similarity of genetic structures. Genetic differentiations were the combined effect of the differences on genetical processes regarding gene flow and selection events. Both differences existed due to differences on (i) population structures including landscape, clonality and parental genetic composition, and (ii) the disturbance histories of population, which affected the equilibrium between gene flow and drift. These findings emphasized the importance of larger gene flow and genetic base to naturally maintain genetical processes of sandalwood population under various landscapes structures.

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Section: Genetic Differentiation Of Sandalwoodmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Gene flow and selection evidence of sandalwood (Santalum album) under various population structures in Gunung Sewu (Java, Indonesia), and its effects on genetic differentiation

et al. 2017

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“…This could have resulted in the evolution of species that were efficiently adapted to withstand the harsh environmental conditions in the canopy and further on rock outcrops (Porembski et al ., ). Many functional traits of bromeliad species related to morphology, physiology and ecology, such as those linked to epiphytism, the tank habit, the xerophytic habit, water and nutrient absorptive leaf trichomes, Crassulacean acid metabolism (CAM) photosynthesis, anatomical characters and clonal reproduction, might have helped them to adapt and radiate in either rain forests or arid regions and to speciate intensively in both regions (Smith, ; Benzing, ; Crayn, Winter & Smith, ; Schulte, Horres & Zizka, ; Schulte, Barfuss & Zizka, ; Santos‐Silva et al ., ; Givnish et al ., ; Hmeljevski et al ., ; Crayn et al ., ; de Paula et al ., ). Further investigations are needed to understand the extent to which epiphytic bromeliads, belonging to the regional species pool, would have shared similar habitat preferences with inselberg rupicolous elements.…”

Section: Discussionmentioning

confidence: 98%

Sugar Loaf Landin south-eastern Brazil: a centre of diversity for mat-forming bromeliads on inselbergs

et al. 2016

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Inselbergs sensu lato are isolated, mainly granitic and gneissic, rock outcrops, forming old landscape elements on crystalline continental shields on all continents. Mats consisting mainly of monocots occur on open rocky slopes, forming a conspicuous habitat on these outcrops. Brazilian lowland inselbergs consist of species-rich mats with large numbers of endemics and Bromeliaceae standing out as characteristic elements in these communities. For the first time, we provide a checklist of mat-forming bromeliads on lowland inselbergs in Brazil and investigate whether the regional species pool influences the species diversity of inselberg mats. Furthermore, through modelling analysis, we looked for the potential distribution of bromeliads endemic to inselbergs, expecting that they would show a narrower niche width than non-endemic species. Our data indicate the existence of a particular phytogeographical region in the Atlantic Forest in south-eastern Brazil, comprising inselbergs harbouring a highly diverse flora of Bromeliaceae, which we call Sugar Loaf Land. In addition, our projections reveal smaller predicted areas for bromeliads endemic to inselbergs compared with non-endemic species, the former apparently being mainly controlled by climatic factors. In addition to climate and regional species pools, the island-like character of inselbergs seems to play an important role in the speciation of rupicolous Bromeliaceae.

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“…Strong genetic differentiation amongst populations is widely reported for plants endemic to granite outcrops (Wyatt et al 1992;Barbará et al 2007;Byrne and Hopper 2008;Tapper et al 2014;Hmeljevski et al 2017), although some populations do maintain connectivity (Gevaert et al 2013;Gonçalves-Oliveira et al 2017). Much less is known about the immediate effects of recruitment on the population genetics of granite-endemic flora, perhaps due to the sporadic and sometimes inefficacious nature of recruitment (Vlasáková 2013;Hmeljevski et al 2014). Harsh environmental conditions that characterise rocky habitats, such as high radiation, extreme temperatures, high runoff and low soil moisture may impede recruitment or cause high mortality of new recruits (Szarzynski 2000).…”

Section: Introductionmentioning

confidence: 99%

Corrigendum to: Wild seedlings of a tree endemic on granite outcrops show no evidence of inbreeding depression

Bezemer¹

2019

Aust. J. Bot.

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The publisher regrets that an element of the reference list was incorrect in the original publication. Reference 29 should read: Gonçalves-Oliveira RC, Wöhrmann T, Benko-Iseppon AM, Krapp F, Alves M, Wanderley MdGL, Weising K (2017) Population genetic structure of the rock outcrop species Encholirium spectabile (Bromeliaceae): the role of pollination vs. seed dispersal and evolutionary implications. American Journal of Botany 104, 868-878. Instead of the original Gonçalves-Oliveira RC, Wöhrmann T, Benko-Iseppon AM, Krapp F, Alves M (2017) Maria das Graças LW, Weising K (2017) Population genetic structure of the rock outcrop species Encholirium spectabile (Bromeliaceae): the role of pollination vs. seed dispersal and evolutionary implications.Abstract. Plant communities on granite outcrops are characterised by high biodiversity and endemism, and strong population genetic structuring. The floristic diversity and structure of inselberg flora receives much attention in international conservation research, yet our understanding of how recruitment influences population genetic structure of plants endemic to granite outcrops is limited. To determine the immediate genetic consequences of recruitment and to quantify mating and dispersal patterns by parentage analysis, I conducted an opportunistic study following a wildfire in a stand of the lignotuberous tree Eucalyptus caesia Benth. (Myrtaceae) at Boyagin Nature Reserve. The entire adult stand (n = 180) plus seedlings (n = 115) were genotyped with 14 microsatellite loci. Compared with adults, seedlings had low heterozygosity and a high inbreeding co-efficient, but similar levels of allelic diversity. There was no evidence of post-germination selection against homozygous seedlings over the 20 month survey period. Seedlings that resulted from cross-pollination were more heterozygous than seedlings resulting from selfing, but could not be distinguished based on height measurements or survivorship. Parentage analysis in CERVUS revealed mostly limited seed dispersal, assuming that candidate parents closest to seedlings were the maternal parent. By comparison, pollen movement was more extensive, yet still restricted to plants within the stand. Recruitment has increased the population size, but appears insufficient to enhance genetic diversity in the Boyagin stand of E. caesia. Nonetheless, E. caesia appears adept at persisting as extremely small populations.

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Conservation assessment of an extremely restricted bromeliad highlights the need for population-based conservation on granitic inselbergs of the Brazilian Atlantic Forest

Cited by 19 publications

References 58 publications

Gene flow and selection evidence of sandalwood (Santalum album) under various population structures in Gunung Sewu (Java, Indonesia), and its effects on genetic differentiation

Gene flow and selection evidence of sandalwood (Santalum album) under various population structures in Gunung Sewu (Java, Indonesia), and its effects on genetic differentiation

Sugar Loaf Landin south-eastern Brazil: a centre of diversity for mat-forming bromeliads on inselbergs

Corrigendum to: Wild seedlings of a tree endemic on granite outcrops show no evidence of inbreeding depression

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