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

Rocha, Keila Cristina de Jesus; Goldenberg, Renato; Meirelles, Julia; Viana, Pedro Lage

doi:10.1590/2175-7860201768336

Cited by 15 publications

(6 citation statements)

References 26 publications

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“…was considered one of the main components of canga vegetation and was also recorded in forest and swamp vegetation, although species of this genus are pollinated by bees (Zappi et al, 2018). The floral characteristics of Miconia undif., such as long and poricidal anthers (Rocha et al, 2017) and mass flowering, favour the high production and dispersal of pollen grains.…”

Section: Discussionmentioning

confidence: 99%

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: Discussionmentioning

confidence: 99%

Hydroclimate influences on modern pollen rain of upland southeastern Amazonia

et al. 2020

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“…Considering the knowledge regarding the plant diversity in the Amazon rainforest in Brazil, it is still being assembled (Morim & Lughadha 2015;Cardoso et al 2017); Pará is no exception and many new species have Rodriguésia 73: e00522020. 2022 been described recently for this state (e.g., Salas et al 2015;Rocha et al 2017;Reis et al 2017b;Silva et al 2019aSilva et al ,b, 2021.…”

Section: Introductionmentioning

confidence: 81%

The genus Justicia (Acanthaceae) in the state of Pará, Amazon, Brazil

et al. 2022

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The taxonomic knowledge for genus Justicia in the Amazonian state of Pará, Brazil, is updated. The study was based on material from important national and international herbaria, as well as specimens collected in different vegetation types within the state, some of them kept under cultivation by the first author. Twenty five species of Justicia were recorded for Pará: J. asclepiadea, J. birae, J. calycina, J. carajensis, J. cayennensis, J. comata, J. distichophylla, J. divergens, J. gendarussa, J. laevilinguis, J. mcdadeana, J. montealegrensis, J. multiglandulosa, J. oldemanii, J. oriximinensis, J. paraensis, J. pectoralis, J. polystachya, J. potamogeton, J. pseudoamazonica, J. riedeliana, J. secunda, J. sphaerosperma, J. sprucei, J. yurimaguensis. Among these, five are new records for the state of Pará (J. asclepiadea, J. cayennensis, J. gendarussa, J. oldemanii, and J. yurimaguensis). Moreover, seven of the accepted names are lectotypified and a new name (J. oriximinensis) is proposed. A species identification key is presented alongside detailed morphological descriptions (including seed analysis), distribution and habitat information, taxonomic comments and illustrations.

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“…The group with the worst performance within our sampling universe was, by far, Melastomataceae, for which we were able to generate sequences only for 26.32% of sampled specimens (and 30.77% of the species). It is important to mention that the Melastomataceae was recorded as the fifth most diverse angiosperm family in the FCC, with a total of 41 species (Mota et al., 2018 ; Rocha et al., 2017 ). Lima et al.…”

Section: Discussionmentioning

confidence: 99%