Flora das cangas da Serra dos Carajás, Pará, Brasil: Poaceae

Viana, Pedro Lage; Rocha, Antônio Elielson Sousa da; Silva, Christian; Afonso, Edgar Augusto Lobato; Oliveira, Reyjane Patrícia de; Oliveira, Regina Célia de

doi:10.1590/2175-7860201869330

Cited by 11 publications

(13 citation statements)

References 33 publications

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“…The species P. densum occurred in the lagoon borders and canga vegetation. According to Viana et al (2018), P. densum habitats, such as swamps and temporary lakes, have humid conditions, similar to the study area. In the studied site, Panicum sp.…”

Section: Relationship Between the Composition Of Modern Pollen Rain Asupporting

confidence: 61%

“…Aparisthmium/Alchornea and Poaceae undif. can occur in open areas such as canga and forest patches, in the transition between cangas and forests, and in forest interiors (Da-Costa et al, 2018; Viana et al, 2018). In addition, these plants are anemophilous, that is, they have pollination strategies and flower structures associated with high pollen productivity (Gosling et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

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Hydroclimate influences on modern pollen rain of upland southeastern Amazonia

et al. 2020

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For accurate interpretations of palaeopalynological data, it is important to understand the influence of the current vegetation composition and characteristics on the formation of the palynological assemblage recorded in artificial or natural pollen traps. Therefore, in this study, modern pollen rain was characterized using artificial pollen traps under different ecological conditions and climatic seasons in Trilha da Mata Lake, Carajás North Ridge, southeastern Amazonia. The collection of pollen rain data comprises the total period from September 2015 to August 2016. There were two periods of low rainfall (September to December 2015 and May to August 2016) and one period of high rainfall (January to April 2016). The first two periods were represented by a predominance of canga vegetation pollen relative to forest pollen. Under dry conditions, the associations among the taxa Aparisthmium/Alchornea, Myrcia and Bellucia dichotoma were considered important for forest ecosystems, while those among Pleroma, Hyptis parkeri, Borreria and Perama carajensis were considered important for canga ecosystems. Under wet conditions, the forests were well represented by Schefflera, Anthurium lindmanianum, Pseudopiptadenia suaveolens and Glycydendron, and the most represented canga vegetation in the pollen rain were Poaceae undif., Miconia, M. acutistipula var. ferrea and Psychotria. Aparisthmium/Alchornea and Poaceae undif. Aparisthmium/Alchornea was related to periods of low water availability, and Poaceae undif. was associated with marshy or flooded environments. Thus, an increase in the influx of Poaceae undif. pollen grains was determined by variations in the extension of flooded areas, indicating an increase in the amount of rainfall and not the opposite case. Thus, future studies on vegetation reconstruction must consider modern pollen assemblages to precisely determine paleoenvironmental and paleoclimate conditions during sediment deposition.

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Section: Relationship Between the Composition Of Modern Pollen Rain Asupporting

confidence: 61%

Section: Discussionmentioning

confidence: 99%

Hydroclimate influences on modern pollen rain of upland southeastern Amazonia

et al. 2020

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“…(Monteiro, 2018), Poaceae, 4 spp. (Viana et al, 2018), Rubiaceae, 7 spp. (Zappi et al, 2017a), Rutaceae, 1 sp.…”

Section: List Comparisonmentioning

confidence: 99%

Edaphic Endemism in the Amazon: Vascular Plants of the canga of Carajás, Brazil

et al. 2019

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Amazonia is one of the most diverse biomes worldwide, and, as well as luxuriant forest, it includes mountain areas which, despite their small surface area, display fascinating endemism. In these regions, the specificity of edaphic factors is mirrored by a highly specialised, isolated flora adapted to survive adverse conditions. The Serra dos Carajás in the Brazilian state of Pará is one of world's largest iron ore reserves. Known locally as canga, this ironstone formation occupies an area of 115.9 km 2 , and supports campo rupestre of canga vegetation on outcrops that are mostly in the Floresta Nacional de Carajás (FLONA of Carajás) and Parque Nacional dos Campos Ferruginosos (PNCF). The recent publication of the Flora of the cangas of Carajás lists 856 species of seed plants and 186 species of ferns and lycophytes. This project assessed the canga endemic species growing in the region, and further expeditions guided by SDM were carried out in order to ascertain their distribution outisde the area. Departing from an initial list of 58 putative endemics, the final list comprises 38 species of vascular plants (c. 4% of the local flora). These are distributed in 31 genera and 22 families, including three monotypic genera: Carajasia (Rubiaceae), Monogereion and Parapiqueria (Asteraceae). From these, 24 are classified as Rare Species for Brazil and seven as Highly Restricted Endemic (EEO < 100 km 2). An illustrated account is provided, as well as further SDM to detect other possible areas of distribution based on the studied species. The knowledge generated is aimed at directing appropriate conservation plans for the area.

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“…Overall, grasses are recognized for their adaptations to warm and dry environments, including high carbon assimilation and water use efficiency [ 18 , 19 ]. The two grass species Axonopus longispicus and Paspalum cinerascens were the most common and were found to be widely distributed, covering large open areas of grasslands and identified amid the canga shrublands [ 20 ]. Both species are perennial, have fast growth rates during the wet season, form large bunches, and are not restricted to canga physiognomies [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

“…The two grass species Axonopus longispicus and Paspalum cinerascens were the most common and were found to be widely distributed, covering large open areas of grasslands and identified amid the canga shrublands [ 20 ]. Both species are perennial, have fast growth rates during the wet season, form large bunches, and are not restricted to canga physiognomies [ 20 ]. These native grasses could be used to build strips over steep slopes inside mines and on piles of waste substrates.…”

Section: Introductionmentioning

confidence: 99%

Native Amazonian Canga Grasses Show Distinct Nitrogen Growth Responses in Iron Mining Substrates

Caldeira¹,

Lima²,

Ramos³

et al. 2021

Plants

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Native species may have adaptive traits that are advantageous for overcoming the adverse environmental conditions faced during the early stages of mine land rehabilitation. Here, we examined the nitrogen (N) growth responses of two native perennial grasses (Axonopus longispicus and Paspalum cinerascens) from canga in nutrient-poor iron mining substrates. We carried out vegetative propagation and recovered substantial healthy tillers from field-collected tussocks of both species. These tillers were cultivated in mining substrates at increasing N levels. The tillering rates of both species increased with the N application. Nonetheless, only in P. cinerascens did the N application result in significant biomass increase. Such growth gain was a result of changes in leaf pigment, stomatal morphology, gas exchanges, and nutrients absorption that occurred mainly under the low N additions. Reaching optimum growth at 80 mg N dm−3, these plants showed no differences from those in the field. Our study demonstrates that an input of N as fertilizer can differentially improve the growth of native grasses and that P. cinerascens plants are able to deposit high quantities of carbon and protect soil over the seasons, thus, making them promising candidates for restoring nutrient cycling, accelerating the return of other species and ecosystem services.

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Flora das cangas da Serra dos Carajás, Pará, Brasil: Poaceae

Cited by 11 publications

References 33 publications

Hydroclimate influences on modern pollen rain of upland southeastern Amazonia

Hydroclimate influences on modern pollen rain of upland southeastern Amazonia

Edaphic Endemism in the Amazon: Vascular Plants of the canga of Carajás, Brazil

Native Amazonian Canga Grasses Show Distinct Nitrogen Growth Responses in Iron Mining Substrates

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