Ecological Differentiation within a Cosmopolitan Group of Planktonic Freshwater Bacteria (SOL Cluster, Saprospiraceae, Bacteroidetes)
Members of the monophyletic SOL cluster are large filamentous bacteria inhabiting the pelagic zone of many freshwater habitats. The abundances of SOL bacteria and compositions of SOL communities in samples from 115 freshwater ecosystems around the globe were determined by fluorescence in situ hybridization with cluster- and subcluster-specific oligonucleotide probes. The vast majority (73%) of sampled ecosystems harbored SOL bacteria, and all three previously described SOL subclusters (LD2, HAL, and GKS2-217) were detected. The morphometric and chemicophysical parameters and trophic statuses of ecosystems were related to the occurrence and subcluster-specific composition of SOL bacteria by multivariate statistical methods. SOL bacteria did not occur in acidic lakes (pH
The aim of this interpretive qualitative study was to understand how software product management (SPM) activities differ in SMEs (small and medium-sized enterprises) and in large enterprises (LEs). We studied thirteen software organizations representing various types of software products and analyzed the collected data by applying the grounded theory method. As a result, we summarized the observations, explaining the main differences between SMEs and LEs and identified SPM activities that are size-dependent, size-independent, and specific for SMEs and LEs only. Our results indicate that the company size affects goals and activities of SPM. Therefore, companies of different size require different approaches in the adoption of SPM activities.