Ecological Traits and Genetic Variation in Amazonian by N. Bergholz
By N. Bergholz
Read or Download Ecological Traits and Genetic Variation in Amazonian Populations of the Neotropical Millipede Poratia Obliterata PDF
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Extra resources for Ecological Traits and Genetic Variation in Amazonian Populations of the Neotropical Millipede Poratia Obliterata
2), sheltered against solar radiation and rainfall by a roof (Fig. 15a). To protect the millipedes from predatory ants, all a b Fig. 15a-b. Cultivation of Poratia obliterata. a – the animals were kept in plastic boxes and maintained in outdoor enclosures at ambient temperature, sheltered by a roof. R. Bergholz). 3. ECOLOGICAL TRAITS 51 boxes were arranged on supports within plastic basins filled with water (Fig. 15b). The animals in the ‘constant temperature’ treatment were kept in a climate chamber at a constant temperature of 24 °C, like in the investigations on gonad dormancy in P.
Residuals were shown to be normally distributed. The total number of millipedes in the flooding experiment cannot be referred to since data for the specimens dwelling in the soil is not available. Instead of relative frequencies, the maximum number of adults and juveniles observed at a specific location (litter, bark and container walls) per month was considered for interpretation. The proportion of the respective abundance in the first month (control) to that in the second month (treatment) was used to compare relative migratory responses to flooding.
Field studies were comple- The second chapter addresses whether the observed adaptive ecological traits involve ecological speciation processes. Allozyme data provide an effective tool not only to assess cryptic speciation but also adaptive divergence among populations in diverse biotopes. Therefore, I employed allozyme 2. THESIS OUTLINE 33 diagnostics in order to reveal effects of the different biotope types on the genetic constitution of local populations in P. obliterata. Since both biotope quality and geographic distance influence the genetic differentiation between subpopulations, spatial connectivity and migration were also considered.