Novedades para la flora del Uruguay: nuevo registro de Agarista (Ericaceae)

Grela, Iván A.; Brussa, Carlos A.

doi:10.1590/s0102-33062005000300011

Cited by 4 publications

(2 citation statements)

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“…These are elevations of about 300 m above mean sea level (rising between 100 m and 150 m with respect to ground level), generally formed by Jurassic sandstones, characterized (from top to bottom) by a flat top, a stone ledge of variable height and a concave or stepped hillside. In its upper layers, this sandstone generally has undergone a silicification process that makes it particularly hardy, resisting the surrounding erosion and leaving a well-defined flat-top (Chebataroff & Zavala, 1975;Grela & Brussa, 2005). Flat-top hills represent a distinctive feature of the Uruguayan landscape with particular cultural importance (Brussa & Grela, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Little is known about the vegetation at the top of these hills, which mostly consists of sparse grasslands, with a varying abundance of trees and shrubs. Previous studies on these formations have focused on woody species (which mainly grow on the slopes of the hills), highlighting their distinctive flora, with the occurrence of several rare or exclusive species within the country (Marchesi, 1997;Grela, 2004;Grela & Brussa, 2005;Brussa & Grela, 2007;Ramos, 2009). However, the herbaceous vegetation, which is dominant in these landforms, has not been properly described to this date.…”

Section: Introductionmentioning

confidence: 99%

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Plants at the summit: characterization of grasslands on cerros chatos of northeastern Uruguay

Pañella,

Mailhos,

Bonifacino

et al. 2023

Darwiniana, nueva serie

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Flat-top hills (“cerros chatos”) stand out as distinct relief formations in northeastern Uruguay. These are elevations of about 300 m above mean sea level, generally formed by Jurassic sandstones, characterized by a flat top, a stone ledge of variable height, and a concave or stepped hillside. Little is known about the vegetation atop these hills, which consists mostly of sparse grasslands with little to no grazing. As such, the aim of this study is to make the first characterization of the vegetation at the top of flat-top hills. In order to achieve this, we describe the vegetation of three emblematic hills in the region: Del Medio Hill, Vigilante Hill and Miriñaque Hill. Plant species composition surveys were carried out in spring 2021 and autumn 2022, identifying and delineating distinct vegetation formations. 315 species belonging to 63 vascular plant families were identified, with Poaceae and Asteraceae ranking as the top two families in terms of species richness. Among the species found, 31 are included in the list of priority species for conservation in Uruguay. Furthermore, Achyrocline marchiorii represents a new record for the Uruguayan flora. Two vegetation formations were present in all three hills: the ledge formation, associated with the rocky outcrops around the perimeter of the hilltops; and the crest formation, associated with the deep soils and low rock cover at the center of the hilltops. A shoulder formation of colluvial origin was also identified in the Miriñaque Hill, showing moderate slope and rockiness. The uncommon flora found on top of these hills is threatened due to the rapid increase of afforestation in the region, and the presence of the alien species Cynodon dactylon, Melinis repens and Pinus taeda. Such evidences emphasize the need for urgent management plans to protect these hills, which are not covered by any conservation program on a national or global scale.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plants at the summit: characterization of grasslands on cerros chatos of northeastern Uruguay

Pañella,

Mailhos,

Bonifacino

et al. 2023

Darwiniana, nueva serie

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Neotropical Arachnological Collections: Basic Tools for the Development of Spider Research

Brescovit

Francke

Laborda

et al. 2017

Behaviour and Ecology of Spiders

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Catalogue of the vascular epiphytic flora of Uruguay

et al. 2019

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We provide an updated list of the vascular epiphytic flora occurring in native environments of Uruguay based on literature review, herbarium specimens, and fieldwork throughout the country. The catalogue provides standardized information for each species, including accepted name, synonyms used within Uruguay, epiphytic category, distribution within the country, habitat, conservation status, observations, and a voucher citation. The effort documented 73 species for the epiphytic flora of Uruguay (3 % of the flora), distributed among 29 genera and 12 families. Bromeliaceae was the richest family (17), followed by Polypodiaceae (16) and Orchidaceae (12). Tillandsia stood out as the most speciose genus with 15 species. Characteristic holoepiphytes was the most diverse ecological category. More than half of the epiphytic species documented for Uruguay (53 %) reach their southernmost geographic distribution in the country, whereas only two mostly epipetric species of Tillandsia-T. arequitae and T. uruguayensis-are endemic to the country. Almost half of the epiphytic species found are presently under categories of threat of extinction, with 60 % of them occurring in national protected areas. Both the richest epiphytic families and the predominance of characteristic holoepiphytes coincide with findings from floristic and ecological studies previously carried out in humid subtropical regions.

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Novedades para la flora del Uruguay: nuevo registro de Agarista (Ericaceae)

Cited by 4 publications

References 0 publications

Plants at the summit: characterization of grasslands on cerros chatos of northeastern Uruguay

Plants at the summit: characterization of grasslands on cerros chatos of northeastern Uruguay

Neotropical Arachnological Collections: Basic Tools for the Development of Spider Research

Catalogue of the vascular epiphytic flora of Uruguay

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