A medium-spatial scale distribution pattern of Pseudoscorpionida (Arachnida) in a gradient of topography (altitude and inclination), soil factors, and litter in a central Amazonia forest reserve, Brazil

Abstract

AbstrActin Amazonia, nothing is known about the distribution of the invertebrates on a medium-spatial scale pattern. in a trail system of 64 km 2 at ducke reserve, we sampled 72 transects using the hand-sorting method and berlese-tullgren extraction. the reserve possesses ecosystems of "terra-firme" forest and the trail system represents a gradient of topographic soil factors and vegetation, avoiding categorizations. considering the abundance and diversity of pseudoscorpionida, we investigated the relation of the community to environmental factors tested (topography, clay percentage, litter, and soil ph), to the two major drainage basins of the reserve, and if these invertebrates can be used as biological indicators to monitor changes. We registered two species for the first time in the reserve, increasing the known diversity to 17 species. the lack of correlation with the predictor variables and the large home range, indicate that pseudoscorpions are not good biological indicators in the reserve. As the eastern and western watersheds are not separate management units for the community, our results show that they are generalist predators. in spite of our results and lack of knowledge concerning their biology, life history and taxonomy, pseudoscorpions are cosmopolitan and easy to find and measure. compared with previous studies in the reserve, they have a consistent pattern of abundance and diversity throughout the years showing the stability of the community which can be checked mainly by comparison with environmental changes that would occur in the reserve. An investigation on a medium-spatial scale pattern and over a long-term period including other habitats, and also other predictor variables, like humidity, the structure of the vegetation and canopy closure, will be necessary to reinforce the observed tendencies.Keywords: central Amazonia, soil arthropods, medium-spatial scale, biological indicator pseudoscorpionida. na Amazonia, nada é conhecido sobre o padrão de distribuição de invertebrados em escala meso-espacial. em um sistema de trilhas de 64 km 2 na reserva ducke, foram coletados invertebrados em 72 parcelas por meio de coleta manual e método de berlese-tullgren extraction. A reserva possui ecossistemas de florestas terra-firme e as trilhas representam um gradiente de topografia, fatores do solo e vegetação, * part of a master´s degree dissertation of the second author. 792 AguiAr, n. o., guAlberto, t. l. and frAnklin, e. [791][792][793][794][795][796][797][798][799][800][801][802] 2006 evitando categorizações. considerando a abundância e a diversidade de pseudoscorpionida, investigouse a relação da comunidade com os fatores ambientais (topografia, porcentagem de argila, serapilheira e ph do solo), com as duas bacias de drenagem (leste e oeste) da reserva, e se esses invertebrados podem ser usados como indicadores biológicos para monitorar mudanças. foram registradas duas espécies pela primeira vez na reserva, aumentando a diversidade para 17 espécies. A falta de correlação com as variáveis predit...

Aproximación a la fauna de pseudoescorpiones (Arthropoda: Arachnida) del departamento de Sucre, Caribe colombiano

“…Constituyen un grupo mesodiverso de arácnidos (HARVEY, 2013); sin embargo, solo seis especies fueron registradas presentando una baja riqueza para las localidades muestreadas en este estudio, algunos autores como WEYGOLDT (1969); GABBUTT (1970); MORÁIS y ADIS (1997); AGUIAR et al (2006) sugieren una estrecha relación de la abundancia de los pseudoescorpiones con la estructura vegetal de la zona; asimismo, estos arácnidos se encuentran ocupando uno o varios microhábitats BATTIROLA et al, 2017).…”

The Need for Large-Scale, Integrated Studies of Biodiversity - the Experience of the Program for Biodiversity Research in Brazilian Amazonia

“…For ants, soil texture could predict 3 to 31% (depending on the collection method) of species composition (Oliveira et al 2009). Some biological groups, such as pseudo-scorpions (Aguiar et al 2006), were not associated with soil and topography, and the tight control on plot environmental conditions means that these results are not artifacts of sampling.…”

Nuevos registros de pseudoescorpiones (Arachnida: Pseudoscorpiones) de Colombia

“…La mayor parte de los estudios se concentran en la región Andina, principalmente en los departamentos de Cauca, Cundinamarca, Valle del Cauca y región Pacífica. Sin (Aguiar et al, 2006), fue colectado en el interior de un fragmento de bosque secundario a 86 msnm, a unos 8 cm de profundidad. La superficie se encontraba cubierta con hojarasca y pequeños pastizales en zonas cercanas a un pequeño ecosistema léntico.…”

“…Para la identificación de las especies se realizaron montajes no permanentes en glicerina, los cuales se analizaron mediante un microscopio (Carl Zeiss, plus Axiostar, Alemania) usando las claves taxonómicas de familia y géneros (Chamberlin;1931;Harvey, 1992;Mahnert & Adis, 2002;Buddle, 2010) y para la determinación de las especies se usaron las descripciones realizadas por With (1908), Mahnert (1979), y Harvey & Muchmore (2013). El material identificado forma parte de la colección de arácnidos fenómeno de migración vertical por los periodos de alta humedad (Adis & Mahnert, 1993 (Adis & Mahnert, 1993;Mahnert, 2001;Aguiar et al, 2006). Distribución geográfica: Argentina, Brasil, Colombia, Ecuador, Paraguay, Venezuela.…”

“…Algunos autores como Weygoldt (1969), Gabbutt (1970), de Morais et al (1997, o Aguiar et al (2006) sugieren una estrecha relación de la abundancia de los pseudoescorpiones con la estructura vegetal de la zona; asimismo, estos arácnidos se encuentran ocupando uno o varios microhábitats (Murienne et al, 2008;Battirola et al, 2017). Por tanto, con mayor esfuerzo de muestreo explorando otros hábitats y empleando otras técnicas de muestreo, se podrán obtener mayores valores de riqueza de la fauna de pseudoescorpiones (Bedoya-Roqueme et al, 2017b).…”