![]() ![]() However, the meta-analysis showed that taxonomic richness is positively related with dissolved oxygen concentration. The qualitative analysis did not show strong consistent effects of either dissolved oxygen concentration or temperature on diversity. For the meta-analysis, we could only use raw data of a few papers in generalized linear models. ![]() For the qualitative part of this systematic review, we used results on patterns of taxonomic richness and multivariate ordination analyses to expose effects of temperature and dissolved oxygen concentration on biodiversity. We accessed two literature repositories and assessed papers for eligibility using a set of predetermined criteria. Here, we undertook a systematic review, consisting of both qualitative and quantitative analyses, to disentangle these two drivers. A complicating factor is that two of the main drivers, oxygen and temperature, are correlated, and hence studies towards drivers of lotic diversity are confounded. Despite ongoing loss of diversity in freshwater ecosystems, and despite mitigation measures to halt this loss, it is still not clear what ecological drivers underlies lotic biodiversity. ![]()
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