Flutuação populacional da mesofauna em fragmentos de mata na região de Dourados - MS

Abstract

RESUMOComo a abundância e diversidade da mesofauna edáfica em ecossistemas florestais é grande, objetivou-se, no presente estudo avaliar a flutuação e o número populacional de indivíduos da mesofauna, entre eles Acari e Collembola, em três fragmentos de matas situados na aldeia Bororó e Jaguapiru e o outro na fazenda Azulão na Região de Dourados-MS. O experimento foi conduzido em delineamento inteiramente casualizado, em esquema fatorial 3 (fragmentos) x 5 (indivíduos) x 15 (épocas de amostragem), com 10 repetições. As amostragens foram realizadas quinzenalmente, no período de fevereiro a setembro de 2005. Os indivíduos foram coletados através do funil de Berlesse modificado. Os ácaros Oribatida (Arachinida: Acari) foram os que apresentaram maiores números populacionais, diferindo estatisticamente dos Gamasida (Arachinida: Acari) e dos indivíduos Enthomobriidae (Collembola), no período de março, maio e agosto de 2005, em todos os fragmentos analisados. O porcentual de indivíduos da fauna edáfica, nos três fragmentos, diferiram estatisticamente, sendo maior no fragmento Azulão.Termos para indexação: Ácaros, mesofauna edáfica, flutuação populacional. ABSTRACTAs the abundance and diversity of soil mesofauna in forest ecosystems is large, the aim of this present study was to evaluate the fluctuation and the populational number of individuals from mesofauna, amongst them Acari and Collembola, in three parts of forests placed in Bororó and Jaguapiú tribes and another one in Azulão farm, in a region of Dourados-MS. The experiment was led in a totally random outline in factorial 3 (fragment) x 5 (individuals) x 15 (period of sampling) with 10 repetitions. The samplings were carried out fortnightly, from February to September of 2005. The individuals were collected through a modified Berlesse funnel. Individuals Oribatida (Arachinida: Acari) were those which presented the highest populational numbers, differing statistically from Gamasida (Arachinida: Acari) and individuals Enthomobriidae (Collembola) during march, may and august of 2005, in all analysed parts. The individuals percentage from soil fauna in the three parts differed themselves statistically, being higher in Azulão area.

Soil fauna as an indicator of soil quality in forest stands, pasture and secondary forest

“…Two evaluations were performed: stands in each seasons and seasons in each stand. To explain the fluctuation in the population of soil fauna individuals (Mussury et al, 2008), multivariate cluster analysis was performed by the Ward method with software STATISTICA 7.0 (StatSoft, 2004). Clustering was done based on abundance in the rainy season, as the differences between management systems were greater in this season (Moço et al, 2005).…”

Fauna Edáfica Na Dinâmica Sucessional Da Mata Atlântica Em Floresta Estacional Semidecidual Na Bacia Do Rio Paraíba Do Sul - Rj

“…Essa influência da sazonalidade na comunidade edáfica, como relatado anteriormente, tem sido estudada por diversos autores (MOÇO et al, 2005;GOMES et al, 2007;MUSSURY et al, 2008;MENEZES et al, 2009;CALVI et al, 2010;CUNHA-NETO et al, 2012). O padrão de maior número de organismos no verão não foi constatado nesse estudo, sendo os maiores valores encontrados em agosto, mês que compreende o período seco.…”

Edaphic fauna in a vegetation gradient in the Sete Cidades National Park

“…Several studies have shown a pattern of increase of these variables as a function of successional advancement or environmental preservation as compared with anthropic lands (Tews et al, 2004;Moço et al, 2005;Gomes et al, 2007;Mussury et al, 2008;Machado et al, 2015). These authors concluded that the structural complexity of the vegetation in terms of diversity, led to higher deposition and better quality of litter, providing more favorable conditions of food resources, shelter and reproduction.…”

“…In general, studies that provide information on the Cerrado soil fauna address the way in which the fauna diversity responds to changes depending on the land use (Gomes et al, 2007;Mussury et al, 2008), since these invertebrates are sensitive to the changes generated by the creation of agroecosystems (Decaens et al, 2004). On the other hand, few studies have evaluated the fauna behavior in soils under preserved environments (Pereira et al, 2013).…”