Two New Species of <i>Eriocaulon</i> from the Tocantins-Araguaia River Basin, Brazil

Oliveira, Adriana Luiza Ribeiro de; Bove, Claudia Petean

doi:10.1600/036364411x583592

Cited by 8 publications

(4 citation statements)

References 3 publications

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“…Collections were made randomly, primarily along state roads (MT-100, MT-126, MT-326, GO-164, GO-184, GO-173, GO-221, GO-324, GO-334, and GO-530) and federal roads (BR-070, BR-158, BR-242 and BR-251); in both, rainy and dry seasons (1997, 1999, 2004, 2006, and 2007). Part of this material has been used in previous studies (Gil et al 2007, Koehler and Bove 2001, Koehler and Bove 2004, Oliveira and Bove 2011), which overlap some portion of the study area for the present study. Surveyed habitats included rivers, streams, seasonally and permanently flooded areas (Fig.…”

Section: Methodsmentioning

confidence: 99%

Checklist of aquatic and marshy Monocotyledons from the Araguaia River basin, Brazilian Cerrado

Oliveira¹,

Bove²

2016

BDJ

1,514

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BackgroundThe Araguaia River basin runs through the states of Goiás, Mato Grosso, Tocantins, and Pará, covering 373,000 Km2, mostly within the Brazilian Cerrado. The region has a wide variety of wetlands. The climate is characterized by high temperatures and strongly seasonal precipitation. There are two well defined seasons: the dry season (winter-spring) and the rainy season (summer- fall). The Araguaia River basin is dominated by plinthosoils that are found in low flat areas, poorly drained and prone to flooding, yielding wetland habitats of high plant diversity. Since the 1970s, human activities have led to reduction in both the diversity and area of wetlands. The construction of the Belém-Brasília highway and hydroelectric dams, as well as the expansion of agricultural and mining activities, have had major impacts on the region.New informationThe flora diversity data of the Araguaia River basin was developed through field work, herbarium research, and use of a database (Species Link). The resulting checklist of 162 aquatic and marshy monocotyledons from the Araguaia River basin represents 20 families and 50 genera. Cyperaceae (51 spp.), Poaceae (39 spp.), and Eriocaulaceae (16 spp.) are the most representative families. Life form analysis indicates that helophytes predominate (98 spp.; 60.5%). One hundred one species are native to tropical and/or subtropical America and twenty one are endemic to Brazil. Ninety-three species are new occurrences for the Araguaia River basin. Among them, three species are reported in the Brazilian Cerrado for the first time. This work contributes to the understanding of aquatic plant diversity in the Cerrado and other savanna-like vegetation physiognomies; environments and habitats poorly understood taxonomically and undercollected generally.

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Section: Methodsmentioning

confidence: 99%

Checklist of aquatic and marshy Monocotyledons from the Araguaia River basin, Brazilian Cerrado

Oliveira¹,

Bove²

2016

BDJ

1,514

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“…Several systematic studies have focused on Eriocaulon in Australia [9,10] and India [12] using the molecular and morphological evidence. In the last ten years, many new Eriocaulon species have been described in India [13][14][15][16][17], Southeast Asia [18][19][20][21], and Brazil [22][23][24].…”

mentioning

confidence: 99%

Insights into the phylogeny and chloroplast genome evolution of Eriocaulon (Eriocaulaceae)

Liu

Deng

et al. 2023

BMC Plant Biol

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Background Eriocaulon is a wetland plant genus with important ecological value, and one of the famous taxonomically challenging groups among angiosperms, mainly due to the high intraspecific diversity and low interspecific variation in the morphological characters of species within this genus. In this study, 22 samples representing 15 Eriocaulon species from China, were sequenced and combined with published samples of Eriocaulon to test the phylogenetic resolution using the complete chloroplast genome. Furthermore, comparative analyses of the chloroplast genomes were performed to investigate the chloroplast genome evolution of Eriocaulon. Results The 22 Eriocaulon chloroplast genomes and the nine published samples were proved highly similar in genome size, gene content, and order. The Eriocaulon chloroplast genomes exhibited typical quadripartite structures with lengths from 150,222 bp to 151,584 bp. Comparative analyses revealed that four mutation hotspot regions (psbK-trnS, trnE-trnT, ndhF-rpl32, and ycf1) could serve as effective molecular markers for further phylogenetic analyses and species identification of Eriocaulon species. Phylogenetic results supported Eriocaulon as a monophyletic group. The identified relationships supported the taxonomic treatment of section Heterochiton and Leucantherae, and the section Heterochiton was the first divergent group. Phylogenetic tree supported Eriocaulon was divided into five clades. The divergence times indicated that all the sections diverged in the later Miocene and most of the extant Eriocaulon species diverged in the Quaternary. The phylogeny and divergence times supported rapid radiation occurred in the evolution history of Eriocaulon. Conclusion Our study mostly supported the taxonomic treatment at the section level for Eriocaulon species in China and demonstrated the power of phylogenetic resolution using whole chloroplast genome sequences. Comparative analyses of the Eriocaulon chloroplast genome developed molecular markers that can help us better identify and understand the evolutionary history of Eriocaulon species in the future.

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“…Because this species has a small area of occupancy (< 500 km 2 ), few locations are known (≤5) and it suffers an increasing of human pressure with continuing decline of area of occupancy, the conservation rating of Endangered Category (ENB2) is proposed. Eriocaulon araguaiense was included in Critically Endangered category in the original description (Oliveira & Bove 2011) This species occurs in the Pampas (RS) and Uruguay. It was not found in conservation units.…”

Section: Eriocaulon Alto-gibbosummentioning

confidence: 99%

ERIOCAULON L. from Brazil: An annotated checklist and taxonomic novelties

Oliveira

Bove

2015

Acta Bot. Bras.

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Eriocaulon is an aquatic and cosmopolitan genus with 478 species. It is characterized by diplostemonous flowers and free petals with a black gland at the apex. There are few taxonomists studying Eriocaulon from Brazil. The species of this genus remain barely delimited, with inconsistent descriptions, and nomenclatural types not assigned or located. The analysis of nomenclatural types, specimens in scientific collections, and protologues enabled the recognition of 53 species of Eriocaulon from Brazil. Thirteen new synonyms and the elevation of five varietes to species level are proposed. Comments on taxonomy, geographic distribution, habitat, life form, and conservation category are provided.

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Two New Species of Eriocaulon from the Tocantins-Araguaia River Basin, Brazil

Cited by 8 publications

References 3 publications

Checklist of aquatic and marshy Monocotyledons from the Araguaia River basin, Brazilian Cerrado

Checklist of aquatic and marshy Monocotyledons from the Araguaia River basin, Brazilian Cerrado

Insights into the phylogeny and chloroplast genome evolution of Eriocaulon (Eriocaulaceae)

ERIOCAULON L. from Brazil: An annotated checklist and taxonomic novelties

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