Briófitas da caatinga 1: Estação Experimental do IPA, Caruaru - PE

Pôrto, Kátia Cavalcanti; Silveira, Maria de Fátima Galdino da; Sá, Patrícia Sheyla de Almeida

doi:10.1590/s0102-33061994000100008

Cited by 21 publications

(14 citation statements)

References 4 publications

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“…The annual species compensate for this water loss by producing a large number of spores and using their ornamentation to attract animals for their dispersion (Glime 2007;Vanderpoorten & Goffinet 2009). As in the present study, other floristic studies of bryophytes in the caatinga (Pôrto et al 1994;Bastos et al 1998b) have shown low species richness, with representative species typically being tolerant of exposure to intense light and heat, such as those of the families Pottiaceae and Ricciaceae. A little over one third of the species recorded in the present study were also included in the flora listed in the literature cited above.…”

Section: Resultssupporting

confidence: 61%

“…In the campos rupestres, bryophytes have been studied in the state of Minas Gerais-in the Serra do Cipó (Yano 1987), Serra da Piedade (Yano & Carvalho 1995) and Grão Mogol (Yano & Peralta 2009)-and in the state of Bahia, specifically within the Chapada Diamantina ecoregion (Harley 1995;Bastos et al 1998aBastos et al , 2000. Studies of bryophytes in the caatinga have been conducted in the states of Pernambuco (Pôrto et al 1994) and Bahia (Bastos et al 1998b).…”

Section: Introductionmentioning

confidence: 99%

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Species richness and distribution of bryophytes within different phytophysiognomies in the Chapada Diamantina region of Brazil

2013

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The Chapada Diamantina ecoregion is within the caatinga (shrublands) biome of Brazil. Environmental factors determine the phytophysiognomies that distinguish the ecoregion from the surrounding areas. This study aimed to investigate the distribution of bryophyte flora in this ecoregion, by phytophysiognomy and elevational zone. Analyzing specimens we collected from five municipalities in the region, together with specimens (previously collected from the region) in herbaria, we identified 400 taxa. The phytophysiognomies that presented the highest species richness and the greatest numbers of exclusive taxa were forests and campos rupestres (dry, rocky grasslands), which respectively accounted for 51% and 40% of the taxa, compared with only 5% and 4%, respectively, for the caatinga and cerrado (savanna). Species richness and the numbers of exclusive taxa were highest in the lower and upper montane zones. There was a predominance of neotropical taxa and a significant number of disjunct species found in Brazil and in the Andes region. We conclude that the Chapada Diamantina region is an important center of bryophyte diversity, harboring not only a great number of species overall but also a considerable number of species exclusive to the region, primarily in forests and campos rupestres at elevations above 800 m.

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Section: Resultssupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Species richness and distribution of bryophytes within different phytophysiognomies in the Chapada Diamantina region of Brazil

2013

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“…Concerning the vascular flora, there are some more or less constant species like the legumes Caesalpinia microphylla and Mimosa caesalpiniaefolia, the belly trees Cavanillesia arborea and Chorisia crispifolia, the Capparidaceae Capparis yco, several cacti of the genera Cereus and Opuntia, the Euphorbiaceae Jathropa and Cnidosculus phyllacanthus, the Apocynaceae Aspidosperma pyrifolium, the Rhamnaceae Ziziphus joazeiro, and the Anacardiaceae Spondias tuberosa (Rizzini, 1979;Ferri, 1980). Caatinga bryoflora has been poorly studied with the only reference being that of Pôrto et al (1994) The relation of families and species, with comments on the ecology and distribution is given below, as well as a summary table (Tab. 1).…”

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confidence: 99%

<p><strong>Bryophytes from some Caatinga areas in the state of Bahia (Brazil)</strong></p>

Bastos

Albertos

Bôas

1998

BDE

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Abstract:The caatinga is a deciduous and xerophilous vegetation that covers large areas in Brazil. An irregular rainfall with a marked dry period is a characteristic feature. This paper represents the first contribution to the knowledge of the bryoflora from caatinga vegetation in the State of Bahia. The survey was carried out in several areas from Bahia in which eigthteen species of bryophytes were found (15 mosses and 3 liverworts). The bryoflora from caatinga is composed mainly of generalists and xerophilous taxa, but even some hygrophilous species can be found. A number of species including Hyophiladelphus agrarius, Hyophila involuta, Calymperes palisotii ssp. richardii, Bryum argenteum, Entodontopsis leucostega, Octoblepharum albidum, Frullania ericoides also occur in other vegetation types. However, there are a number of species restricted to this type of vegetation, such as Helicophyllum torquatum and Riccia vitalii, at least in Bahia. Most moss species were acrocarpous with erect and short (short-turf) growth-form, whereas the foliose hepaticae were of incubous, and thallose forms.

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“…Bryophytes have greater species richness in wet tropical forest than in dry tropical forests (see Delgadillo & Cárdenas 1990;Pôrto et al 1994;Pôrto & Bezerra 1996;Glime 2007;Silva & Germano 2013;Silva et al 2014). Despite soil islands being one of the richest microhabitats of rocky outcrops of xeric environments (Silva et al 2014), the richness of bryophytes is naturally low in these habitats (Silva & Germano 2013;Silva et al 2014), probably because of the low tolerance of bryophytes to water deficit.…”

Section: Discussionmentioning

confidence: 99%

Bryophyte richness of soil islands on rocky outcrops is not driven by island size or habitat heterogeneity

et al. 2018

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Th e species-area relationship (SAR) is one of the oldest and most studied ecological models, having even served as the foundation of the Th eory of Island Biogeography. Nevertheless, the relative importance of habitat heterogeneity to SAR remains poorly understood. Our aim was to test the relative importance of habitat heterogeneity to the SAR of bryophyte assemblages of soil islands of rocky outcrops in the semi-arid region of Brazil. We randomly selected 15 to 20 soil islands on each of four outcrops for a total of 59 soil islands, and calculated the area, mean depth, and number of substrates for each. We used Generalized Linear Models (GLM) to test the SAR with two models, one using species richness and another using life-form richness as the dependent variables. We found no positive relationship between area and habitat heterogeneity, nor any evidence of a SAR, such as a positive relationship between area and species or life-form richness neither between habitat heterogeneity and species richness. However, our fi ndings did show that life-form richness is related to bryophyte species richness on the soil islands. We conclude by suggesting that not only can microclimate infl uence bryophyte richness, but opportunistic colonization by bryophytes is also important.

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Briófitas da caatinga 1: Estação Experimental do IPA, Caruaru - PE

Cited by 21 publications

References 4 publications

Species richness and distribution of bryophytes within different phytophysiognomies in the Chapada Diamantina region of Brazil

Species richness and distribution of bryophytes within different phytophysiognomies in the Chapada Diamantina region of Brazil

<p><strong>Bryophytes from some Caatinga areas in the state of Bahia (Brazil)</strong></p>

Bryophyte richness of soil islands on rocky outcrops is not driven by island size or habitat heterogeneity

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