Environmental Variables Influencing Chironomid Assemblages (Diptera: Chironomidae) in Lowland Rivers of Central Poland
| Autor: | Małgorzata Dukowska, Łukasz Głowacki, Maria Grzybkowska, Joanna Leszczyńska |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
River continuum concept 010603 evolutionary biology 01 natural sciences Chironomidae Rivers Animals Organic matter Ecosystem Ecology Evolution Behavior and Systematics chemistry.chemical_classification Ecology biology 010604 marine biology & hydrobiology Aquatic ecosystem Bayes Theorem biology.organism_classification Substrate (marine biology) chemistry Benthic zone Insect Science Poland Species richness Environmental Monitoring |
| Zdroj: | Environmental Entomology. 48:988-997 |
| ISSN: | 1938-2936 0046-225X |
| Popis: | Chironomids (Diptera: Chironomidae) are a family of dipterans with a global distribution. Owing to their great functional diversity and ability to adapt to a wide range of environmental conditions, they often dominate in freshwater macroinvertebrate communities, playing a key role in the cycling of organic matter and the flow of energy in aquatic ecosystems. Our aim was to analyze the structure of chironomid assemblages and identify the environmental factors, including current velocity, river width, water depth, water temperature, dissolved oxygen, percentage of substrate covered by vascular plants, inorganic bottom substrate, and quantity of benthic (BPOM) and transported (TPOM) particulate organic matter, that underpin variation in species richness across a set of lowland rivers in central Poland, differing by stream order and abiotic parameters. Using an Information Theoretic Approach, we formulated a set of alternative models based on previously published work, with models fitted in a Bayesian framework using Integrated Nested Laplace Approximation. The species richness of chironomids increased with river order, achieving a maximum in third and fourth order rivers, but decreased at higher orders. The best-fitting models included a positive effect of inorganic substrate index and dissolved oxygen on chironomid species richness. The quality structure of chironomid assemblages reflected the assumptions of the River Continuum Concept showing that species richness was under the influence of factors operating at both a micro- (inorganic bottom substrate) and macro-scale (dissolved oxygen). |
| Databáze: | OpenAIRE |
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