Diversity and Evolution of Flowering Plants of the Caatinga Domain

Queiroz, Luciano Paganucci de; Cardoso, Domingos; Fernandes, Moabe Ferreira; Moro, Marcelo Freire

doi:10.1007/978-3-319-68339-3_2

Cited by 200 publications

(234 citation statements)

References 97 publications

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“…The distribution of Lachesiodendron gen. nov. was plotted on a map of the neotropical region prepared in ArcMap v.10.3 (ESRI, 2011), using geographical coordinates of 408 herbarium specimens. To demonstrate the ecological preference of the new genus, we mapped the seasonally dry tropical forests and woodlands (SDTFW) biome as defined by Queiroz & al. (2017), combining the polygons of 38 ecoregions of Olson & al.…”

Section: Methodsmentioning

confidence: 99%

“…Thus, while there is strong evidence to suggest that P. viridiflora forms a lineage distinct from Piptadenia s.str., previous phylogenetic analyses suffer from missing data and lack of support across parts of the phylogeny, suggesting the need for a more comprehensively sampled phylogenetic framework. Furthermore, exploring the morphological evolution in such a heterogeneous collection of mimosoid genera will allow us to firmly place P. viridiflora, an ecologically important species in the neotropical seasonally dry tropical forest and woodland (SDTFW) biome (Pennington & al., 2009;Queiroz, 2009;Oliveira-Filho & al., 2013;DRYFLOR, 2016;Queiroz & al., 2017).…”

Section: Introductionmentioning

confidence: 99%

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Lachesiodendron, a new monospecific genus segregated from Piptadenia (Leguminosae: Caesalpinioideae: mimosoid clade): Evidence from morphology and molecules

Ribeiro

Luckow

Lewis

et al. 2018

TAXON

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The widest historical circumscription of the mimosoid legume genus Piptadenia (Caesalpinioideae: mimosoid clade) previously embraced morphologically disparate species that are currently ascribed to nine different genera. Previous molecular phylogenetic studies have demonstrated that the neotropical dry forest Piptadenia viridiflora is not closely related to Piptadenia s.str. Here we plug gaps in the DNA sequence dataset of a recently published study to build a more comprehensive phylogeny of the Piptadenia group and revise morphological evidence to define the phylogenetic relationship of P. viridiflora. Both morphological and molecular data confirm that P. viridiflora is an isolated lineage, thus warranting the description of the new monospecific genus Lachesiodendron. The new genus is diagnosed by the combination of paired stipular spines (vs. stipules not modified into spines in Piptadenia s.str.), prickles absent (vs. present), flowers in axillary spikes not grouped in compound inflorescences (vs. spikes grouped in compound pseudoracemes or panicles), flowers with a cylindrical corolla long exserted from the calyx (vs. corolla campanulate with petals free or slightly joined at the base) and long green stamens (vs. shorter and white, pale yellow or pink stamens). In addition, Lachesiodendron has pollen aggregated into 8–celled polyads with a hamulate exine, which further contrasts with the 12–celled polyads with a psilate exine in Piptadenia s.str.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lachesiodendron, a new monospecific genus segregated from Piptadenia (Leguminosae: Caesalpinioideae: mimosoid clade): Evidence from morphology and molecules

Ribeiro

Luckow

Lewis

et al. 2018

TAXON

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“…(). This biome encompasses a range of seasonally dry tropical vegetation, from medium stature closed‐canopy deciduous forests – exemplified by Neotropical seasonally dry tropical forests (SDTFs) (Pennington et al ., , , ; Särkinen et al ., ; DRYFLOR, ; Dexter et al ., ; Silva de Miranda et al ., ) – to lower stature open thorn and cactus scrub and thicket vegetation, together grouped as seasonally dry tropical forest and woodland (SDTFW rather than SDTF) (de Queiroz et al ., ). As defined by Schrire et al .…”

Section: Introductionmentioning

confidence: 97%

Global Succulent Biome phylogenetic conservatism across the pantropical Caesalpinia Group (Leguminosae)

et al. 2019

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Summary The extent to which phylogenetic biome conservatism vs biome shifting determines global patterns of biodiversity remains poorly understood. To address this question, we investigated the biogeography and trajectories of biome and growth form evolution across the Caesalpinia Group (Leguminosae), a clade of 225 species of trees, shrubs and lianas distributed across the Rainforest, Succulent, Temperate and Savanna Biomes. We focused especially on the little‐known Succulent Biome, an assemblage of succulent‐rich, grass‐poor, seasonally dry tropical vegetation distributed disjunctly across the Neotropics, Africa, Arabia and Madagascar. We reconstructed a time‐calibrated phylogeny, assembled species occurrence data and assigned species to areas, biomes and growth forms. These data are used to estimate the frequency of transcontinental disjunctions, biome shifts and evolutionary transitions between growth forms and test for phylogenetic biome conservatism and correlated evolution of growth forms and biome shifts. We uncovered a pattern of strong phylogenetic Succulent Biome conservatism. We showed that transcontinental disjunctions confined within the Succulent Biome are frequent and that biome shifts to the Savanna, Rainforest and Temperate Biomes are infrequent and closely associated with shifts in plant growth forms. Our results suggest that the Succulent Biome comprises an ecologically constrained evolutionary arena spanning large geographical disjunctions across the tropics.

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“…These narrow areas around the slabs present floristic similarities with some tropical forests existing in highlands environments in the Brazilian semiarid [24,86]. This study reveals that cover of plant species considered exclusive of (sub)humid biomes in Brazil extends beyond highlands in the semiarid, associated with the high soil organic carbon content and water retention capacity of more developed soils than the typical of the Caatinga.…”

Section: Discussionmentioning

confidence: 61%

Tropical forest refuge in peripheral soils of slags in Caatinga

Jjll

et al. 2018

Preprint

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18The influence of environmental factors on the structure and composition of plant 19 communities in the Caatinga is complex and poorly explored. Spatial variation of 20 biodiversity in Caatinga is poorly know and strictly attributed to climatic conditions. 21 We investigated the influence of slags on floristic composition and structure of a 22 shrubby-arboreal community in one of the driest region in Brazil. Chemical and 23 physical analyses of soils were performed in samples of seven plots from savannic 24 formations and from forest formations. Vegetation was characterized floristically and 25 structurally in all plots. Habitats were structurally distinct, and diversity differed 2 26between peripheral and non-peripheral areas of slags. Nine of the ninety-seven species 27 identified are reported to (sub)humid biomes. Soils are dominantly shallow, eutrophic 28 and sandy loam. However, soils in the periphery of slags are more developed once 29 paludization, melanization and bioturbation were verified. Our results suggest that soil 30 fertility did not influence vegetable cover in Caatinga. The cover of plant species 31 considered exclusive of (sub)humid biomes in Brazil extends beyond highlands in the 32 semiarid, associated with high soil organic carbon content and water retention capacity 33 of more developed soils than the typical of the Caatinga. 34 35 36 Dryland biomes cover 41.5 % of the Earth's surface, with seasonally dry tropical 37 forests occupying approximately 1,327 million hectares within this area [1]. The largest 38 area of continuous dry tropical rainforests in Latin America occurs in Brazil, with 39 approximately 800.00 km². Popularly called as Caatinga (Mata Branca), most trees and 40shrubs lose their leaves in the dry season, which can last up to nine months a year in 41 certain regions [2]. 42 Caatinga is a Brazilian exclusive biome composed by different plant formations 43 [3] and its diversity is considered one of the most biodiverse among semiarid biomes 44 [4,5]. Among the several ecosystems that exist in the Caatinga, granitic intrusions in the 45 form of inselbergs, massive, slags (lajedos in portuguese) and bornhardts cover 15 % of 46 the total area of the northern Brazilian Northeast [6]. 47Low developed, shallow and eutrophic soils are dominant in Caatinga due to 48 tropical dry climate. However, high local diversity of soils has been attributed to 49 variance of lithology and, or, relief by recent studies [7]. Understood soil diversity is a 50 relevant task, especially considering that plant distribution is conditionate by soil 3 51 properties [8,9]. Soil influences plant physiognomies in Brazilian Savanna (Cerrado) 52[10], Restinga forest [11], Amazonia rainforest [12,13], Tundra [14] and other biomes 53 around the world [15,16]. However, species diversity in Caatinga is poorly know [17] 54 and strictly attributed to climatic conditions [18][19][20]. 55The purpose of this study was to investigate a vegetation gradient at preserved 56 slabs in Caatinga, and t...

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Diversity and Evolution of Flowering Plants of the Caatinga Domain

Cited by 200 publications

References 97 publications

Lachesiodendron, a new monospecific genus segregated from Piptadenia (Leguminosae: Caesalpinioideae: mimosoid clade): Evidence from morphology and molecules

Lachesiodendron, a new monospecific genus segregated from Piptadenia (Leguminosae: Caesalpinioideae: mimosoid clade): Evidence from morphology and molecules

Global Succulent Biome phylogenetic conservatism across the pantropical Caesalpinia Group (Leguminosae)

Tropical forest refuge in peripheral soils of slags in Caatinga

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