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Previous issue date: 2015-04-20 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / As brom?lias constituem importante microhabitat para a herpetofauna, pois s?o
bastante utilizadas como abrigo contra predadores, al?m de sua arquitetura foliar
possibilitar manuten??o de umidade e temperatura relativamente constantes no seu
interior, compondo um ambiente favor?vel para os anf?bios e r?pteis, especialmente em
?reas sob estresse h?drico. No entanto, os estudos que tratam dessa rela??o ainda s?o
incipientes e mais concentrados sobre as brom?lias fitotelmatas acumuladoras de ?gua.
No caso das brom?lias rup?colas n?o fitotelmatas do g?nero Encholirium, que se
desenvolvem em afloramentos rochosos e abrigam esp?cies de regi?es semi?ridas como
as Caatingas, as rela??es animais-plantas s?o praticamente desconhecidas. Nesse
contexto, este estudo teve como objetivos estudar a fauna herpetol?gica habitante das
brom?lias macambiras, Encholirium spectabile, analisando a ocupa??o e uso destas
brom?lias pelos diferentes t?xons, e a ecologia comportamental do largarto Psychosaura
agmosticha, buscando identificar os fatores associadas com esta rela??o estrita em ?rea
de Caatinga. Uma ampla revis?o da literatura mundial acerca do tema lagartos em
brom?lias subsidiou este estudo sob a perspectiva ecol?gica dessa associa??o. O trabalho
de campo foi realizado na Fazenda Tanques, munic?pio de Santa Maria/RN, mesorregi?o
do Agreste potiguar, com as observa??es e/ou coletas diurnas e noturnas efetuadas
mensalmente, durante tr?s dias consecutivos, de Janeiro de 2011 a Agosto de 2012,
totalizando 450 horas.homem de esfor?o amostral. Registraram-se dezesseis esp?cies,
seis de lagartos (Fam?lias Mabuyidae, Tropiduridae, Gekkonidae e Phyllodactylidae), seis
de serpentes (Fam?lias Boidae e Dipsadidae) e quatro de anf?bios da Fam?lia Hylidae. O
efeito da borda da mata sobre a distribui??o das esp?cies ao longo do afloramento foi
significativo, com a maioria das esp?cies encontradas nas bordas do afloramento.
Constataram-se diferen?a significativa entre alguns pares de esp?cies com rela??o ao uso
2
das brom?lias, e sobreposi??o de nicho quase total no uso de microhabitat. 62.5% das
esp?cies s?o de h?bito noturno e utilizaram essas plantas para abrigo, reprodu??o e
alimenta??o. Quanto ?s rela??es entre o lagarto Psychosaura agmosticha e as brom?lias
macambiras, foram registrados os comportamentos de termorregula??o e de forrageio nas
esta??es seca e chuvosa. Os per?odos de atividade foram concentrados entre 07 e 10 h e
entre 15 e 17 horas nas duas esta??es, demostrando um padr?o claramente bimodal. A
esp?cie usou basicamente as folhas verdes e n?o houve diferen?as significativas entre
machos e f?meas na utiliza??o das brom?lias. Associa??es positivas foram encontradas
entre a temperatura do corpo e temperaturas das brom?lias e do ar. Esta esp?cie passou
em m?dia 1.95 ? 3.8% do tempo em movimento (PTM) e se movimentou em m?dia 0.36
? 2.1 segundos por minuto (MPM), com diferen?as significativas entre as esta??es
chuvosa e seca para PTM, e tamb?m entre o tempo m?dio da parada e dura??o m?dia dos
movimentos, sendo considerada forrageadora sedent?ria. Psychosaura agmosticha, na
?rea estudada, ? bromel?cola, utilizando as macambiras principalmente para
termorregula??o e forrageio. Os resultados deste estudo destacam as brom?lias rup?colas
Encholirium spectabile como elementos chaves para a manuten??o de anf?bios e r?pteis
a ela associados, e uma clara associa??o vantajosa para a conserva??o dos grupos
envolvidos. / Bromeliads are an important microhabitat for the herpetofauna, for being widely
used as refuge from predators and their leaf architecture allows humidity maintenance
and relatively constant temperature inside, setting a favorable environment for
amphibians and reptiles, especially in areas under hydric stress. However, studies
addressing this relationship are still incipient and more concentrated in fitotelmatas
bromeliad. For non-fitotelmatas rupicolous bromeliads of the gender Encholirium, which
develops into rocky outcrops and contains species of semi-arid regions such as the
Caatinga, animal-plant relationships are almost unknown. In this context, this study aimed
to know the herpetological fauna inhabitant of macambiras bromeliads, Encholirium
spectabile, analyzing occupation and use of these bromeliads by different taxa, and the
behavioral ecology of the lizard Psychosaura agmosticha, seeking to identify factors
associated with this strict relationship in Caatinga. An extensive review of the world
literature on the subject ?lizards in bromeliads? subsidized this study from the ecological
perspective of this association. The field work was carried out at Fazenda Tanques,
municipality of Santa Maria / RN, mesoregion of Agreste Potiguar. The observations
and/or data collection in daytime and in the evening was conducted monthly during three
consecutive days, from January 2011 to August 2012, totaling 450 hour.man of sampling
effort. Sixteen species were registered: six lizards (Mabuyidae, Tropiduridae, Gekkonidae
and Phyllodactylidae Families), six snakes (Boidae and Dipsadidae Families) and four of
amphibians of Hylidae Family. The effect of the forest edge on the distribution of species
along the outcrop was significant, with most species found in outcrop edges. Significant
difference was found between some pairs of species concerning use of bromeliads, and
almost total niche overlap in the use of microhabitat. 62.5% of the species are nocturnal
and use these plants for sheltering, breeding and feeding. Regarding the relations between
4
the lizard Psychosaura agmosticha and macambiras bromeliads, behaviors of
thermoregulation and foraging in the dry and wet seasons were recorded. Activity periods
were concentrated between 7 and 10 am and between 3 and 5 pm in both seasons, showing
a clear bimodal pattern. The species basically used the green leaves and there were no
significant differences between males and females in the use of bromeliads. Positive
associations were found between body temperature and temperatures of bromeliads and
air. This species spent 1.95% ? 3.8 of the time moving (PTM) and moved on average 0:36
? 2.1 seconds per minute (MPM), with significant differences between the wet and dry to
PTM, and between the average time of stop and average duration of movements, being
considered a sedentary forager. Psychosaura agmosticha, in the study area, is
bromelicolous and uses macambiras primarily for thermoregulation and foraging. The
results of this study elevate the rupicolous bromeliads Encholirium spectabile as key
elements for the maintenance of amphibians and reptiles associated with it, and a clear
advantageous association for the conservation of the groups involved.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/19848 |
| Date | 20 April 2015 |
| Creators | Jorge, Jaqueiuto da Silva |
| Contributors | 10843175400, http://lattes.cnpq.br/6388455734228621, Miranda, Maria de F?tima Arruda de, 09453997404, http://lattes.cnpq.br/4654421846443562, Vrcibradic, Davor, 03416820711, http://lattes.cnpq.br/0745234893730812, Freire, Eliza Maria Xavier |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM PSICOBIOLOGIA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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