Luis Henrique Zanini Branco

Luis Henrique Zanini Branco
São Paulo State University | Unesp · Department of Zoology and Botany, Sao Jose do Rio Preto campus

PhD

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80
Publications
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Publications

Publications (80)
Article
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The cyanobacterial genus Nostoc is an important contributor to carbon and nitrogen bioavailability in terrestrial ecosystems and a frequent partner in symbiotic relationships with non-diazotrophic organisms. However, since this currently is a polyphyletic genus, the diversity of Nostoc -like cyanobacteria is considerably underestimated at this mome...
Article
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Biological soil crusts or biocrusts have critical ecological roles in dryland ecosystems including soil stabilization, erosion control and nutrient cycling. Global environmental changes are expected to impact terrestrial ecosystems, including biocrust communities. Thus, a growing number of studies have focused on investigating the diversity of bioc...
Article
The saline-alkaline lakes (soda lakes) are the habitat of the haloalkaliphilic cyanobacterium Anabaenopsis elenkinii , the type species of this genus. To obtain robust phylogeny of this type species, we have generated whole-genome sequencing of the bloom-forming Anabaenopsis elenkinii strain CCIBt3563 isolated from a Brazilian soda lake. This strai...
Article
In the uppermost millimeters of soils is commonly found a thin layer of cryptobiotic organisms, including cyanobacteria, microalgae, lichens, mosses, fungi, bacteria and archaea. These communities are called Biological Soil Crusts (BSCs) or biocrusts and perform important ecological functions, mainly attributed to their capacity of providing soil s...
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The last decade was marked by efforts to define and identify the main cyanobacterial players in biological crusts around the world. However, not much is known about biocrusts in Brazil’s tropical savanna (cerrado), despite the existence of environments favorable to their development and ecological relevance. We examined the community composition of...
Article
A new Phormidium‐like genus was found during an investigation of Oscillatoriales diversity in Brazil. Eight aerophytic populations from south and southeastern regions were isolated in monospecific cultures and submitted to polyphasic evaluation. The populations presented homogeneous morphology with straight trichomes, not attenuated, and apical cel...
Article
Studies on cyanobacterial diversity in bromeliad phytotelmata are scarce, despite their ecological importance in this environment, including N 2 fixation for bromeliad nutrition. Here we discuss the morphological and ecological aspects of 18 cyanobacteria species collected in tank bromeliads in Bahia State, northeastern Brazil. The material examine...
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Knowledge of algal and cyanobacterial diversity of phytotelmata remains poorly-known, especially for bromeliads from different vegetation formations. We investigated the microalgae communities of four species of tank bromeliads from different vegetation formations in Bahia State, Northeast Brazil, highlighting the composition, richness and diversit...
Article
The order Trentepohliales represents one of the most prominent algal groups in terrestrial habitats but its taxonomy and phylogeny are still poorly understood. During a survey of Trentepohliales in different Brazilian biomes, some trentepohlialean populations were found in mixed forest localities growing on the bark of the gymnosperm Araucaria angu...
Article
Tropical ecosystems worldwide host very diverse microbial communities, but are increasingly threatened by deforestation and climate change. Thus, characterization of biodiversity in these environments, and especially of microbial communities that show unique adaptations to their habitats, is a very urgent matter. Information about representatives o...
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Variations in microbial communities promoted by alterations in environmental conditions are reflected in similarities/differences both at taxonomic and functional levels. Here we used a natural gradient within mangroves from seashore to upland, to contrast the natural variability in bacteria, cyanobacteria and diazotroph assemblages in a pristine a...
Article
Several new genera originally classified as the genus Phormidium, a polyphyletic and taxonomically complex genus within the Oscillatoriales, were recently described. The simple morphology of Phormidium does not reflect its genetic diversity and the delimitation of a natural group is not possible with traditional classification systems based on morp...
Article
The genus Wilmottia was described based on polyphasic studies of Phormidium murrayi populations that revealed them not closely related to other Phormidium species, despite their morphological similarity. The genus contained one species, W. murrayi, found exclusively in cold and temperate areas of the world. Other species morphologically similar to...
Article
Trentepohliales is one of the most diverse and abundant algal group of the terrestrial microflora in tropical regions; however, information about composition, richness and distribution of these algae in Neotropical regions are scarce. We described the flora and evaluated species richness and composition of Trentepohliales in four Brazilian differen...
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Phormidium Kützing ex Gomont, a common genus of Cyanobacteria, is widely known as a problematic group. Its simple morphology is not congruent with its genetic heterogeneity and several new generic entities have been described based on 16S rRNA gene analyses from populations with similar morphology. During a study about the diversity of Phormidioide...
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Two coccoid cyanobacteria isolated from South Atlantic Ocean continental shelf deep water and from a marine green algae inhabiting the Admiralty Bay, King George Island, Antarctica were investigated based on morphological and ultrastructural traits, phylogeny of 16S rRNA gene sequences, secondary structure of the 16S-23S ITS regions and phylogenomi...
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During a study about the diversity of Phormidioideae (Phormidiaceae, Oscillatoriales) in Brazil, seven strains from southern and southeastern regions were isolated in monospecifc cultures and submitted to polyphasic evaluation (morphological, ecological, cytological and molecular studies). The populations studied were found to be morphologically si...
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Cyanobacteria dwelling on the salt-excreting leaves of the mangrove tree Avicennia schaueriana were isolated and characterized by ecological, morphological, and genetic approaches. Leaves were collected in a mangrove with a history of oil contamination in the coastline of São Paulo state, Brazil, and isolation was achieved by smearing leaves on the...
Article
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The novel chroococcalean cyanobacterium strain CENA595 was isolated from the deep chlorophyll maximum layer of the continental shelf of the South Atlantic Ocean. Here, we report the draft genome sequence for this strain, consisting of 60 contigs containing a total of 5,265,703 bp and 3,276 putative protein-coding genes.
Article
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Mangroves are subject to the effects of tides and fluctuations in environmental conditions, which may reach extreme conditions. These ecosystems are severely threatened by human activities despite their ecological importance. Although mangroves are characterized by a highly specialized but low plant diversity in comparison to most other tropical ec...
Article
Most of the knowledge about cyanobacteria toxin production is traditionally associated with planktonic cyanobacterial blooms. However, some studies have been showing that benthic cyanobacteria can produce cyanotoxins. According to this, we aimed to evaluate the production of microcystins and saxitoxins in benthic cyanobacteria isolated from aquatic...
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In the last three decades, several studies have suggested that the structure of stream macroalgal communities is shaped by local environmental variables, but some recent papers have shown that the relevance of the environment on these communities may be overestimated. Using Partial Redundancy Analysis (pRDA), we analyzed macroalgal communities (con...
Article
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Abstract: Aerophytic cyanobacteria are commonly found growing on rocks, tree trunks and soil, but the diversity of these organisms is still poorly known. This complex group is very problematic considering the taxonomic arrangement and species circumscription, especially when taking into account tropical populations. In this work, 20 samples of aero...
Article
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Aerophytic cyanobacteria are commonly found growing on rocks, tree trunks and soil, but the diversity of these organisms is still poorly known. This complex group is very problematic considering the taxonomic arrangement and species circumscription, especially when taking into account tropical populations. In this work, 20 samples of aerophytic cya...
Chapter
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Characteristics of the northwest region of São Paulo State and of the remnant forest fragments studied - Characteristics of the northwest region of São Paulo State (climate, relief and soil) are described. The limits of the northwest region, as defined in this study, include the whole drainage basins of Turvo-Grande and São José dos Dourados, and p...
Chapter
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Landscape metrics as species richness indicators for several animal and plant groups in remnant forest fragments of the northwest region of São Paulo State - The use of landscape metrics as species richness indicators has become more frequent in ecological studies during the last decades, particularly for prioritizing areas for biodiversity conserv...
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Distribution patterns of species richness and abundance of several animal and plant groups in remnant forest fragments in the northwest region of São Paulo State - The processes possibly involved in the distribution of species richness and abundance of 14 groups of animals and plants, inventoried in 18 fragments of semideciduous seasonal forest in...
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This study describes and illustrates non-heterocytous filamentous cyanobacteria found in lagoon systems on the coastal plains of Rio Grande do Sul State. Collections were carried out in different freshwater bodies along the eastern (Casamento Lake area) and western (Tapes City area) margins of the Patos Lagoon (UTM 461948-6595095 and 542910-6645535...
Article
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Cyanobacteria are common in aquatic environments but are also well-adapted to terrestrial habitats where they are represented by a diversified flora. The present study aimed to contribute to our taxonomic knowledge of terrestrial cyanobacteria by way of a floristic survey of the main components of corticolous communities found in seasonal semidecid...
Article
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Considering the great ecological importance of the cyanobacteria and the need for more detailed information about these organisms in Brazilian waters, this paper provides taxonomic information about the unicellular cyanobacteria flora in lagoon systems along the coastal plains of Rio Grande do Sul State. Sampling was performed in different freshwat...
Article
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Seventeen streams in 12 forest fragments were sampled during the dry season (June to August of 2007 and of 2008). Sixteen species belonging to 14 genera were found. Cyanophyta and Chlorophyta were the best represented algal division (44 and 38%, respectively), followed by Rhodophyta (12%) and Heterokontophyta (6%). Global species number was low, pr...
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Based on the literature about the cyanobacteria from Brazil and particularly from São Paulo State, the list of Brazilian flora and the data bank of herbaria collections, a total of 460 species were referred to Brazil and 378 to São Paulo State. Taking into account that the group of cyanobacteria presents around 2800 species, these numbers represent...
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Genus Ecballocystis was proposed by Bohlin in 1897 starting from the description of type species Ecballocystis pulvinata, gathered in Brazil (Rio Grande do Sul State). Genus is considered of rare occurrence in the world. In Brazil, the species E. pulvinata has been cited more frequently. Several specimens identified as E. pulvinata gathered from di...
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Algas e cianobactérias podem colonizar uma grande variedade de ambientes terrestres e a composição florística das comunidades desses habitats é praticamente desconhecida. Durante o estudo das algas e cianobactérias aerofíticas de fragmentos florestais na região noroeste do estado de São Paulo, seis populações de cianobactérias não puderam ser ident...
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Macroalgae are typically benthic organisms that a mature, discreet and recognizable naked eye thallus, and microscopic identification is necessary. Several studies have been carried out aiming to the taxonomic knowledge in Brazilian streams, however works dealing with algae from springs are rare. Monthly sampling were carried out from February to S...
Article
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The algae inhabit a wide variety of terrestrial environments and substrates; however the taxonomic knowledge for tropical regions is still scarce. This survey was conducted in ten forest remnants in São Paulo State where visible growths of algae and bryophytes were collected and studied for the main algal components of the communities. Results reve...
Article
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During a study on stream macroalgae from highland areas of southeastern Brazil ("Serra do Cipó", Minas Gerais State), populations of Pulvinularia suecica were found. Study of the specimens provided a detailed description of the pseudodichotomous branch formation, in which the bifurcation is originated by one cell that remains at the basis of the br...
Article
Because algae are primarily aquatic, it seems almost paradoxical that there should exist a relatively diversified soil flora where aerophytic cyanoprokaryotes are especially abundant. However, there appear to be relatively few studies on this topic. This paper aims to improve the taxonomic knowledge on the chroococcalean and oscillatorialean cyanop...
Article
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Estudos florísticos das comunidades de macroalgas lóticas no Brasil são quase que exclusivamente baseadas em material do Estado de São Paulo. Informações sobre macroalgas de riachos são virtualmente ausentes no Estado do Paraná. Considerando a carência de trabalhos sobre estes importantes produtores primários de ambientes lóticos, foi realizado um...
Article
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Surveys of stream macroalgal communities in Brazil are almost exclusively based on data from São Paulo State. There are no extensive studies concerning stream macroalgae in Paraná state. Having in mind the scarcity of works treating these important primary producers in lotic ecosystems, a more comprehensive study was carried out in order to increas...
Article
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Itatiaia National Park (INP) includes two kinds of Brazilian vegetation within its limits: Atlantic tropical rainforest (AF) and highland grassland (HG). Fourteen sites were sampled, seven in each region (AF and HG), in two seasons (summer and winter). Twenty nine species of macroalgae were surveyed, from which 15 in AF and 19 in HG, with only five...
Article
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Ecological distribution of stream macroalgal communities from " Parque Nacional de Itatiaia " , states of Minas Gerais and Rio de Janeiro, Brazil). Itatiaia National Park (INP) includes two kinds of Brazilian vegetation within its limits: Atlantic tropical rainforest (AF) and highland grassland (HG). Fourteen sites were sampled, seven in each regio...
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Schizomeris leibleinii Kützing is an algal species commonly found in eutrophic freshwater or in water polluted by organic nutrients and shows high potential as an organic pollution indicator. S. leibleinii was grown at different nitrate and phosphate concentrations for 50 days. Biomass was determined by quantifying chlorophyll a concentrations for...
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Sirocladium foi descrito por Randhawa (espécie tipo Sirocladium kumaoense) a partir de amostras de uma alga que crescia sobre o solo úmido às margens de uma queda d'água na Índia. O gênero é considerado terrestre e é caracterizado pela presença de apenas dois cloroplastos de forma laminar, bem como pela ocorrência de conjugação sem a formação de tu...
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New aerophytic morphospecies of Nostoc (Cyanobacteria) from São Paulo State, Brazil). Brazilian aerophytic biotopes are almost completely unknown regarding to cyanobacterial flora. During the study of this special flora, three morphospecies of the genus Nostoc from different habitats in the State of São Paulo, Brazil, were found. Based on their mor...
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Sirocladium was described by Randhawa (type species S. kumaoense) on the basis of algal samples from damp soil at the margins of a waterfall in India. The genus is considered to be terrestrial and it is characterized by the presence only of two plate-like chloroplasts as well as by the occurrence of conjugation without tube formation. Currently, Si...
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Blennothrix was proposed by Kützing in 1843, but it was suppressed in the taxonomic starting point of the group. However, Hydrocoleum species with discoid cells and with a special type of branching were transferred to Blennothrix, which was then revalidated. Its species occur in tropical and temperate regions of the world and can be found in saltwa...
Article
In 1898, Kirchner raised the sub-genus Symplocastrum of Schizothrix to genus level but this taxonomic scheme has not been followed in the most classical monographies. However, it is actually considered a valid genus and placed in the family Phormidiaceae. During different studies on aerophytic cyanoprokaryotes from Brazil, some populations of Sympl...
Article
The new cyanobacterial species Cyanoarbor violascens was found and described from subaerophytic habitats (wet lateritic soils) in the northwest region of Sao Paulo State, Brazil. The phenotypic generic features of the population were confirmed and the genus Cyanoarbor Wang 1989 was revised with four species recognized. Cyanoarbor rupestris Wang was...
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The succession dynamics of a macroalgal community in a tropical stream was investigated after disturbance by a sequence of intensive rains. High precipitation levels caused almost complete loss of the macroalgal community attached to the substratum and provided a strong pressure against its immediate re-establishment. After this disturbance, a week...
Article
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The succession dynamics of a macroalgal community in a tropical stream (20º58' S and 49º25' W) was investigated after disturbance by a sequence of intensive rains. High precipitation levels caused almost complete loss of the macroalgal community attached to the substratum and provided a strong pressure against its immediate re-establishment. After...
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Schizomeris Kützing is a filamentous alga without ramifications and with differentiated basal attachment system. The genus contains the type species Schizomeris leibleinii Kützing and the two poorly known species S. irregularis Fritsch & Rich and S. indicum (Ghose) Fritsch & Rich. The species are differentiated mostly by the basal attachment system...
Article
Two cyanoprokaryote populations (Phormidium allorgei and Porphyrosiphon martensianus) were monthly sampled from May 1998 to May 1999 in order to study the stability of specific characteristics of the populations and to evaluate the role of running water forces on the morphological expression of the specimens. 10 sampling units (15 cm diameter circl...
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Mangroves are characterized by their wide environmental variations (mainly of salinity, irradiance and oxygen content) and by the relatively unstable substratum. These conditions demand specific adaptations of the organisms to successfully inhabit this environment. The main objective of the present study was to contribute with the knowledge of the...
Article
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Manguezais caracterizam-se por apresentarem amplas variações ambientais (principalmente de salinidade, irradiância e teor de oxigênio) e possuírem substrato relativamente instável, o que exige adaptações específicas dos organismos para habitar com sucesso este ambiente. O presente estudo procura, principalmente, contribuir com o conhecimento da bio...
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Twelve stream segments were sampled four times in 1998-1999 (one sampling per season) in the drainage basin of the upper São Francisco River (19 masculine 45'-21 masculine 25'S, 49 masculine 05'-51 masculine 30'W), situated in Serra da Canastra National Park, at altitudes ranging from 1,175 to 1,400 m. The macroalgae survey resulted in 30 species,...
Article
1 72 stream segments were sampled for the presence of Chaetophoraceae representatives among macroalgal communities from May to October in 1992-1993 and 1996-1997 in five natural regions (parts of biomes or selected geological areas) and one disturbed area of São Paulo State, southeastern Brazil ( 1 9°45 '-2 1 °25 'S, 49°45 '-5 1 °30 'W). This study...
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Macroalgal communities and environmental variables were analyzed seasonally along a polluted tropical stream in São Paulo State, Brazil. We aimed to improve the knowledge of tropical macroalgal communities, to study the longitudinal and seasonal dynamics of these communities in influenced environments, to evaluate the relationship of algal frequenc...
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A hundred seventy two stream reaches from six distinct natural regions (parts of biomes or geological areas) in São Paulo State (Atlantic Rainforest, Cerrado, Hard Water regions, Northwest region, Subtropical Rainforest, and Tropical Rainforest) were searched for the most representative macroscopic Cyanophyceae of phytobenthic communities. Selected...
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Distribution of Rhodophyta was investigated in 172 stream segments, which were sampled from May to October in 1992-1993 and 1996-1997 in six natural regions (parts of biomes or geological areas) of Sao Paulo State, southeastern Brazil. Red algae occurred in 60.5 % of stream segments sampled, a high frequency in comparison with other major surveys i...
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A new occurrence of the genus Doliocatella (Cyanophyceae, Cyanobacteria) is reported. The type species of the genus, D. formosa, is described from a stream of the tropical Amazonian rainforest (Manaus, Amazonas State, Brazil). A detailed taxonomic description with photomicrographs and ecological characteristics are provided based on the three world...