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Research Interests: Geography, Ecology, Endangered Species, Population, Wetland, and 3 moreHabitat, IUCN Red List, and Otter
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Giant otters are territorial semi-aquatic mammals. It is common to find several individuals exhibiting wounds and scars due to intraspecific conflicts. Myiasis is a parasitic infestation on living tissues of vertebrates caused by... more
Giant otters are territorial semi-aquatic mammals. It is common to find several individuals exhibiting wounds and scars due to intraspecific conflicts. Myiasis is a parasitic infestation on living tissues of vertebrates caused by dipterous larvae, that usually develops in freshly open wounds and can seriously threaten the host’s health. Ectoparasites seem to be rare among giant otters and myiasis had not been recorded in this species until now. Here, is presented one record of myiasis in a free-ranging giant otter found dead in the Pantanal, Brazil. An ulcerative lesion was found in the frontoparietal region, from which 22 larvae were recovered and identified as Cochliomyia hominivorax. The low occurrence of ectoparasites in giant otters might reflect their semi-aquatic habits and their grooming behavior, which makes it difficult for parasites to remain on the skin. The injured otter probably got the larvae after an intraspecific fight. Agonistic encounters between groups of giant o...
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<p>Parts a, b and c were modified from [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0126073#pone.0126073.ref037" target="_blank">37</a>]. Linear territories are represented... more
<p>Parts a, b and c were modified from [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0126073#pone.0126073.ref037" target="_blank">37</a>]. Linear territories are represented by the gray lines along the rivers. The ellipses do not represent actual areas used, but are used to better vizualize boundaries and overlaps.</p
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Between July 2014 and April 2015, we conducted weekly inventories of the circadian activity patterns of mammals in Passo Novo locality, municipality of Alegrete, southern Brazil. The vegetation is comprised by a grassy-woody steppe... more
Between July 2014 and April 2015, we conducted weekly inventories of the circadian activity patterns of mammals in Passo Novo locality, municipality of Alegrete, southern Brazil. The vegetation is comprised by a grassy-woody steppe (grassland). We used two camera traps alternately located on one of four 1 km transects, each separated by 1 km. We classified the activity pattern of species by the percentage of photographic records taken in each daily period. We identify Cuniculus paca individuals by differences in the patterns of flank spots. We then estimate the density 1) considering the area of riparian forest present in the sampling area, and 2) through capture/recapture analysis. Cuniculus paca, Conepatus chinga and Hydrochoerus hydrochaeris were nocturnal, Cerdocyon thous had a crepuscular/nocturnal pattern, while Mazama gouazoubira was cathemeral. The patterns of circadian activity observed for medium and large mammals in this Pampa region (southern grasslands) may reflect not ...
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IGUANA IGUANA (Green Iguana). COPROPHAGY. Zilca Campos, laboratório de vida selvagem, Embrapa Pantanal, CP 109, Corumbá, MS, 79320-900, Brazil (e-mail: zilca.campos@embrapa.br); Caroline leuchtenberger, Laboratório de vida selvagem,... more
IGUANA IGUANA (Green Iguana). COPROPHAGY. Zilca Campos, laboratório de vida selvagem, Embrapa Pantanal, CP 109, Corumbá, MS, 79320-900, Brazil (e-mail: zilca.campos@embrapa.br); Caroline leuchtenberger, Laboratório de vida selvagem, Embrapa Pantanal, CP 109, Corumbá, ms, 79320-900, Brazil (e-mail: caroleucht@gmail. com); Arnaud l. J. Desbiez, Royal Zoological society of scotland, mur-rayfield, edinburgh, eh12 6Ts, scotland 604; Guilherme Mourão, Embrapa Pantanal (guilherme.mourao@embrapa.br.
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Birds of the Serra de Maracaju, Mato Grosso do Sul, Brazil. The Serra de Maracaju stands out in the orography of Mato Grosso do Sul as a watershed between the Upper Paraguay and Upper Parana river basins. In this study, we report on the... more
Birds of the Serra de Maracaju, Mato Grosso do Sul, Brazil. The Serra de Maracaju stands out in the orography of Mato Grosso do Sul as a watershed between the Upper Paraguay and Upper Parana river basins. In this study, we report on the occurrence of 413 species of birds based on historical records and field data collected by us. The records of species such as Aburria nattereri, Ictinia mississippiensis, Spizaetus tyrannus, Micrococcyx cinereus, Berlepschia rikeri, Oxyruncus cristatus, Knipolegus lophotes, Myiarchus tuberculifer, Tyrannopsis sulphurea, Tityra semifasciata, Cyanerpes cyaneus, and Poospiza cinerea are the first for the state of Mato Grosso do Sul. The Serra de Maracaju act as an important dispersal corridor for elements of the Amazon and Atlantic Forest in the eastern border of the Pantanal. Fifteen species reported for the area are regarded as globally or nationally endangered, such Harpia harpyja, Alectrurus tricolor, and Sporophila maximiliani. Human impacting activities such as agriculture, monoculture of exotic trees, and conversion of wood into charcoal, seriously threaten the survival of these and other bird species occurring in the region. The creation of a large conservation unit and the proper management of the landscape, so as to maintain the local diversity and habitat structure, are crucial to ensure the conservation these species and, therefore, the biodiversity of the surrounding plateaus and plains of Pantanal.
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Research Interests: Geography and Archaeology
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ABSTRACT The giant otter (Pteronura brasiliensis) is a social species that defends territories along water bodies. Although some researchers have visually monitored otters during long periods at night, no nocturnal activity of the species... more
ABSTRACT The giant otter (Pteronura brasiliensis) is a social species that defends territories along water bodies. Although some researchers have visually monitored otters during long periods at night, no nocturnal activity of the species has been recorded and giant otters are currently believed to be strictly diurnal. In this study, we present information about the activity patterns of groups of giant otters in the Brazilian Pantanal, using radio telemetry and camera trap data. We captured, implanted transmitters in, and monitored three male giant otters from different groups in the Miranda and the Vermelho Rivers between November 2009 and June 2011. The locations and behavior of the group were recorded at 30-min intervals from 05:00 to 19:00. Camera traps were positioned at the active dens and latrines of eight groups of giant otters in the Miranda, Vermelho and Negro Rivers between June 2010 and October 2011. The groups of giant otters were mostly crepuscular and diurnal, but 31% of the camera-trap recordings were nocturnal. Fishing was the most frequent (64%) behavior recorded by telemetry. Giant otters were recorded exiting the den mostly in the early morning (06:00) and entering the den at the end of the day (16:00 to 19:00). Nocturnal activity appeared to be associated with the need to defecate, prey availability nearby the den and predation risk.
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Territoriality carries costs and benefits, which are commonly affected by the spatial and tempo-ral abundance and predictability of food, and by intruder pressure. Giant otters (Pteronura bra-siliensis) live in groups that defend... more
Territoriality carries costs and benefits, which are commonly affected by the spatial and tempo-ral abundance and predictability of food, and by intruder pressure. Giant otters (Pteronura bra-siliensis) live in groups that defend territories along river channels during the dry season using chemical signals, loud vocalizations and agonistic encounters. However, little is known about the territoriality of giant otters during the rainy season, when groups leave their dry season ter-ritories and follow fish dispersing into flooded areas. The objective of this study was to analyze long-term territoriality of giant otter groups in a seasonal environment. The linear extensions of the territories of 10 giant otter groups were determined based on locations of active dens, la-trines and scent marks in each season. Some groups overlapped the limits of neighboring ter-ritories. The total territory extent of giant otters was correlated with group size in both seasons. The extent of exclusive ter...
The giant otter, Pteronura brasiliensis, (Zimmermann, 1780), is a semiaquatic carnivore that feeds mainly on fish. Mercury has high toxicity and high potential for bioaccumulation in tissues and biomagnification in organisms through food... more
The giant otter, Pteronura brasiliensis, (Zimmermann, 1780), is a semiaquatic carnivore that feeds mainly on fish. Mercury has high toxicity and high potential for bioaccumulation in tissues and biomagnification in organisms through food chains. Thus, as a top predator in the trophic chain, the giant otter has the potential to accumulate mercury by biomagnification. The objective of the present study was to measure the total mercury concentration in giant otter fur samples from an area in the southern Brazilian Pantanal. Fur samples from 19 otters from different social groups were collected from captured animals or were sampled with biopsy darts. Total mercury determination was performed by cold steam spectrophotometry. Mercury concentrations found in the giant otter fur were 7.15 ± 3.41 μg·g-1 (2.01 to 12.06 μg·g-1) dry weight. The values are above to the upper limit found in fur samples of otter species not exposed to contamination sources, which typically range from 1 to 5 μg·g-1...
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1 Pós-Graduação em Ecologia e Conservação, Universidade Federal de Mato Grosso do Sul. 2 Laboratório de Vida Selvagem, Rua 21 de Setembro, Bairro Nossa Senhora de Fátima, C.P. 109, 79320-900, Corumbá, MS. 3 Instituto das Águas da Serra da... more
1 Pós-Graduação em Ecologia e Conservação, Universidade Federal de Mato Grosso do Sul. 2 Laboratório de Vida Selvagem, Rua 21 de Setembro, Bairro Nossa Senhora de Fátima, C.P. 109, 79320-900, Corumbá, MS. 3 Instituto das Águas da Serra da Bodoquena, Rua 24 de fevereiro, 1507, 2o. Piso, Centro, 79290-000, Bonito, MS. 4 Pós-Graduação em Ecologia e Conservação da Biodiversidade. Universidade Estadual de Santa Cruz, Km 16, Rod. Ilhéus-Itabuna, 45662-900, Ilhéus, BA. 5 MAE (Meio Ambiente Equilibrado), Rua Piauí, 854, Apto. 401, Centro, 86020-390, Londrina, PR. 6 Pós-Graduação em Ecologia e Conservação de Recursos Naturais, Universidade Federal de Uberlândia, Bloco 2D, s/n, 38400-902, Uberlândia, MG. 7 Pós-Graduação em Biologia Animal, Universidade Federal de Mato Grosso do Sul, Cidade Universitária s/n, C.P. 549, 79070-900, Campo Grande, MS. 8 Pós-Graduação em Meio Ambiente e Desenvolvimento Regional, Universidade para o Desenvolvimento do Estado e Região do Pantanal, Rua Ceará, 333, Câm...
... BANCA EXAMINADORA: ARNAU LD DESB I EZ Emygdio Leite de Araujo Monteiro Filho Jerry Penha ... 2007). As principais funções relacionadas com marcações de cheiro envolvem defesa de território (Luque-Larena et al., 2001) e comunicação do... more
... BANCA EXAMINADORA: ARNAU LD DESB I EZ Emygdio Leite de Araujo Monteiro Filho Jerry Penha ... 2007). As principais funções relacionadas com marcações de cheiro envolvem defesa de território (Luque-Larena et al., 2001) e comunicação do status sexual e/ou social ...
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Pteridophytes from two fragments of Seasonal Deciduous Forest in the Taquari River Valley, Rio Grande do Sul State, Brazil - A survey was carried out on the richness of ferns occurring in two fragments of Seasonal Deciduous Forest,... more
Pteridophytes from two fragments of Seasonal Deciduous Forest in the Taquari River Valley, Rio Grande do Sul State, Brazil - A survey was carried out on the richness of ferns occurring in two fragments of Seasonal Deciduous Forest, located in the Taquari River Valley, Rio Grande do Sul, Brazil. In both areas, a total of 56 species, 36 genera and 15 families of ferns were observed. In the Roca Sales forest fragment, 48 species were observed while, 32 species were encountered in the Arroio do Meio. The majority of the observed families were common to both sites, except Gleicheniaceae, Hymenophyllaceae, Osmundaceae and Vittariaceae which were only at Roca Sales observed. Hemycriptophyte was the most common life form in both areas. Most of the species were terrestrial. Polypodiaceae, Pteridaceae and Dryopteridaceae were the most representative families. The studied Seasonal Deciduous Forest fragments in Roca Sales and Arroio do Meio present, respectively, 15% and 10% of the fern species...
Ariranhas, Pteronura brasiliensis , sao sociais, vivendo em grupos monogâmicos sob cooperacao reprodutiva, o que restringe o tamanho populacional efetivo da especie aos casais dominantes. Individuos tornam-se maduros a partir de dois anos... more
Ariranhas, Pteronura brasiliensis , sao sociais, vivendo em grupos monogâmicos sob cooperacao reprodutiva, o que restringe o tamanho populacional efetivo da especie aos casais dominantes. Individuos tornam-se maduros a partir de dois anos de vida, sendo que femeas na natureza reproduzem ate os 11 anos de idade aproximadamente e os machos podem reproduzir ate os 15. Dessa forma, estima-se que o ciclo de tres geracoes da especie represente um periodo aproximado de 20 anos. A especie, que ocorria nos biomas Cerrado, Mata Atlântica, Pantanal e Amazonia, sofreu uma drastica reducao populacional no passado devido principalmente a caca. Atualmente, ha registros isolados no Cerrado e possivelmente na Mata Atlântica, no estado do Parana, sendo que populacoes viaveis da especie estao limitadas a Bacia Amazonica e ao Pantanal. Essas areas, no entanto, serao diretamente impactadas pela destruicao e fragmentacao de areas naturais, bem como pela construcao de hidreletricas de pequeno e grande por...
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Galictis cuja e encontrada em uma ampla variedade de ambientes, ocorrendo em densidades variadas. Sua populacao total nao apresenta indicio de declinio, a despeito do desconhecimento das causas das aparentes flutuacoes populacionais, do... more
Galictis cuja e encontrada em uma ampla variedade de ambientes, ocorrendo em densidades variadas. Sua populacao total nao apresenta indicio de declinio, a despeito do desconhecimento das causas das aparentes flutuacoes populacionais, do efeito do alto indice de atropelamentos a que esta submetida e de sua sensibilidade a doencas oriundas de animais domesticos. Salienta-se a importância de pesquisas voltadas a sua dinâmica populacional e conservacao. Ha conectividade com as populacoes dos paises vizinhos, porem nao existem informacoes sobre a dinâmica fontesumidouro. Dessa forma, a especie foi classificada como Menos preocupante (LC).
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Giant otters Pteronura brasiliensis are semiaquatic mammals that mainly eat fish, the abundance of which is affected by seasonal flooding and habitat structure. The piscivorous habits of giant otters lead to negative human perception and... more
Giant otters Pteronura brasiliensis are semiaquatic mammals that mainly eat fish, the abundance of which is affected by seasonal flooding and habitat structure. The piscivorous habits of giant otters lead to negative human perception and conflicts with fisheries. We compared giant otter feeding habits between seasons and habitats in the Southern Pantanal, Brazil, by analyzing feces collected between September 2008 and June 2011.We investigated whether habitat and season affected P. brasiliensis diet composition and prey size. We calculated the frequency of occurrence, relative frequency, and overlap of fish species eaten by giant otters and caught by fishermen. The giant otters had a more diverse assemblage of fish prey than the offtake in the fisheries. We did not find strong seasonality in otter diets, but diet composition and prey size differed between rivers and lakes. The giant otter diet had higher overlap with the offtake of sport than with professional fishermen. Although th...
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Abstract. Mammalian carnivores are considered a key group in maintaining ecologicalhealth and can indicate potential ecological integrity in landscapes where they occur. Carni-vores also hold high conservation value and their habitat... more
Abstract. Mammalian carnivores are considered a key group in maintaining ecologicalhealth and can indicate potential ecological integrity in landscapes where they occur. Carni-vores also hold high conservation value and their habitat requirements can guide managementand conservation plans. The order Carnivora has 84 species from 8 families in the Neotropicalregion: Canidae; Felidae; Mephitidae; Mustelidae; Otariidae; Phocidae; Procyonidae; andUrsidae. Herein, we include published and unpublished data on native terrestrial Neotropicalcarnivores (Canidae; Felidae; Mephitidae; Mustelidae; Procyonidae; and Ursidae). NEOTRO-PICAL CARNIVORES is a publicly available data set that includes 99,605 data entries from35,511 unique georeferenced coordinates. Detection/non-detection and quantitative data wereobtained from 1818 to 2018 by researchers, governmental agencies, non-governmental organi-zations, and private consultants. Data were collected using several methods including cameratrapping, museum collections, roadkill, line transect, and opportunistic records. Literature(peer-reviewed and grey literature) from Portuguese, Spanish and English were incorporated inthis compilation. Most of the data set consists of detection data entries (n = 79,343; 79.7%) butalso includes non-detection data (n = 20,262; 20.3%). Of those, 43.3% also include count data(n = 43,151). The information available in NEOTROPICAL CARNIVORES will contribute tomacroecological, ecological, and conservation questions in multiple spatio-temporal perspec-tives. As carnivores play key roles in trophic interactions, a better understanding of their distri-bution and habitat requirements are essential to establish conservation management plans andsafeguard the future ecological health of Neotropical ecosystems. Our data paper, combinedwith other large-scale data sets, has great potential to clarify species distribution and relatedecological processes within the Neotropics. There are no copyright restrictions and no restric-tion for using data from this data paper, as long as the data paper is cited as the source of theinformation used. We also request that users inform us of how they intend to use the data. Key words: canidae; carnivores; conservation; data paper; felidae; mammal; neotropical region;occurrence; predator; species distribution
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Research Interests: Biology, Ecology, Biodiversity, Databases, DISTRIBUTION, and 15 moreBiodiversity Conservation, Atlantic Forest, Big Data, Biodiversity Hotspots, Atlantic Forest og South America, Armadillo, Dasypodidae, Armadillos, Brazilian Atlantic forest, Distribution, Ecological Applications, Dataset, Giant Anteater, Anteaters, and Bradypodidae
is considered locally threatened in some parts of its range mainly because of hunting pressure and habitat loss. The species is widely distributed in South and Central America. Agouti’s distribution in Brazil is broad, although there is... more
is considered locally threatened in some parts of its range mainly because of hunting pressure and habitat loss. The species is widely distributed in South and Central America. Agouti’s distribution in Brazil is broad, although there is no information on its occurrence in the Northeast region and in the western part of Rio Grande do Sul state. The species presents a marginal distribution in northeastern Uruguay. Here, we describe 16 new records of the species in the Pampa region, including the western part of Rio Grande do Sul state, Brazil and Uruguay, expanding the
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ABSTRACT Giant otters live in family groups, formed by an alpha couple and their offspring of different ages. The objectives of this research were to investigate the association between individuals, the fidelity of groups to their... more
ABSTRACT Giant otters live in family groups, formed by an alpha couple and their offspring of different ages. The objectives of this research were to investigate the association between individuals, the fidelity of groups to their territories and to investigate if there were changes in the numbers of individuals and groups, and the size and distribution of their territories between two consecutive lowwater seasons, in an area of the Pantanal of Brazil. We monitored giant otter groups monthly, between July/2006 and November/2007, on the Vermelho River and on one section of the Miranda River, over a total of 75.8 km. We identified 43 individuals in seven groups. Most association indices between individuals of the same group varied from 1.0 to 0.5. The association levels between the individuals in the two low-water seasons were not random; i.e. groups persisted across seasons. We observed more dispersion of individuals and establishment of new groups during the low-water seasons, and this contributed to the decrease in association of individuals. The average linear size of territories was an 11.4 km stretch of river. There was an average of 10.8 km between the centers of group territories. There was no significant correlation between group size and territory size (r=0.35, n=12). However, the number of latrines (F(1,11) = 13.846, P=0.003; r2=0.56) and the number of scent-marks (F(1,11) = 13.236, P=0.004; r2=0.55) increased linearly with the territory size. During the low-water season of 2007, the groups generally maintained the same territories used during the low-water season of 2006, but two of them apparently exchanged their territories. The number of groups was stable in the study area since 2003, suggesting that the giant otter population is near carrying capacity in the area and has recovered from depletion caused by the poaching from the 1980’s in the Pantanal.
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:Circadian use of time is an important, but often neglected, part of an animal&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s niche. We compared the... more
:Circadian use of time is an important, but often neglected, part of an animal&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s niche. We compared the activity patterns of the Neotropical otterLontra longicaudisin two different areas in Brazil using camera traps placed at the entrance of holts. We obtained 58 independent photos in the Atlantic Forest (273 camera trap-days) and 46 photos in Pantanal (300 camera trap-days). We observed different kernel density probabilities on these two areas (45.6% and 14.1% overlap between the 95% and 50% density isopleths respectively). We observed the plasticity in Neotropical otter activity behaviour with different activity patterns in the two areas. In the Pantanal, the Neotropical otter selected daylight (Ivlev = 0.23) and avoided night (Ivlev = −0.44), while in the Atlantic Forest it selected dawn (Ivlev = 0.24) and night (Ivlev = 0.14), avoiding daylight (Ivlev = −0.33). We believe that this pattern can be due to human activity or shifts in prey activity.
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Abstract Acoustic variation can convey identity information, facilitate social interactions among individuals and may be useful in identifying sex and group affiliation of senders. Giant otters live in highly cohesive groups with... more
Abstract Acoustic variation can convey identity information, facilitate social interactions among individuals and may be useful in identifying sex and group affiliation of senders. Giant otters live in highly cohesive groups with exclusive territories along water bodies defended by the entire group by means of acoustic and chemical signals. Snorts are harsh alarm calls, emitted in threat contexts, which commonly elicit the cohesion and the alert behaviour of the members of the group. The aim of this study was to determine whether giant otter snorts have potential to be used for individual discrimination. We tested this hypothesis by verifying if the acoustic characteristics of snorts vary between two study areas, among social groups and individuals, and between males and females. Snort acoustic variables did not differ significantly among study areas, but varied significantly among groups, individuals and between sexes, with higher discrimination between sexes. The frequency of formants (F1–F5) and formant dispersion (DF) potentially allow identity coding among groups, individuals and sexes. The stronger sex discrimination of snorts may be related to information on body size carried by formant frequencies and dispersion, indicating acoustic sexual dimorphism in giant otters. Acoustic differences among groups and individuals are more likely learned, since we did not find evidence for a genetic signal encoded in the snort variables measured. We conclude that the snorts carry information that could be used for individual or group recognition.
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Group-living in carnivores is mostly associated with cooperative hunting and anti-predator defense. Giant otters (Pteronura brasiliensis) live in monogamous and cooperative breeding groups, where mechanisms other than cooperative foraging... more
Group-living in carnivores is mostly associated with cooperative hunting and anti-predator defense. Giant otters (Pteronura brasiliensis) live in monogamous and cooperative breeding groups, where mechanisms other than cooperative foraging may be driving group maintenance in the species. We herein describe three interactions between giant otters and jaguars (Panthera onca) observed in the wild, two of which involved groups of otters and one, a lone individual. In the two group instances, the otters mobbed the jaguar until it left the area. The mobbing behavior displayed in these instances likely reinforces the advantages of living in groups, reducing predation risk and promoting group cohesion, with resulting territorial and fitness benefits.
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Recebido em 21.VIII.2006. Aceito em 22.I.2009. RESUMO – Foi realizado um levantamento da riqueza de pteridófitas encontradas em dois fragmentos de Floresta Estacional Decidual, situados na Região do Vale do Taquari, Rio Grande do Sul. Nas... more
Recebido em 21.VIII.2006. Aceito em 22.I.2009. RESUMO – Foi realizado um levantamento da riqueza de pteridófitas encontradas em dois fragmentos de Floresta Estacional Decidual, situados na Região do Vale do Taquari, Rio Grande do Sul. Nas duas áreas estudadas, foram registradas 56 espécies, 36 gêneros e 15 famílias. No remanescente situado no interior do município de Roca Sales foram encontradas 48 espécies e no remanescente situado em Arroio do Meio, 32 espécies. A maior parte das famílias observadas foi encontrada em ambas as áreas, com exceção de Gleicheniaceae, Hymenophyllaceae, Osmundaceae e Vittariaceae que foram restritas ao remanescente Roca Sales. A forma de vida hemicriptófita foi a mais comum nas duas áreas. Reptante foi a forma de crescimento mais freqüente em Roca Sales e rosulada em Arroio do Meio. As famílias Polypodiaceae, Pteridaceae e Dryopteridaceae foram predominantes em número de espécies nos dois remanescentes estudados. Os remanescentes estudados em Roca Sales...
Cyathea atrovirens (Langsd. & Fisch.) Domin is a tree fern that occurs in the state of Rio Grande do Sul from sea level to an altitude of 300m. We monitored a population of 10 individuals of C. atrovirens affected by burning in the... more
Cyathea atrovirens (Langsd. & Fisch.) Domin is a tree fern that occurs in the state of Rio Grande do Sul from sea level to an altitude of 300m. We monitored a population of 10 individuals of C. atrovirens affected by burning in the municipality of Campo Bom, Rio Grande do Sul, Brazil. The objective of this study was to analyze the responses of a Cyathea atrovirens population after the occurrence of a fire, considering the following aspects: frond production, annual rates of relative growth of caudex length, and the production, maturation and release of spores. The sporophytes of larger size produced more fronds than the smaller ones. We observed a significant relationship between caudex length and relative growth (TCR) in individuals of smaller size. In the first year, after the fire, all individuals produced new fronds. The spore production was asynchronic. The species apparently demonstrated its capacity to support the occurrence of quick fires, since the post-fire frond productio...