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- Title
The effects of presence of macrophytes on resource uptake by phytoplankton and zooplankton in a tropical reservoir.
- Authors
Diniz, Anamaria Silva; Gama, Watson Arantes; do Nascimento Moura, Ariadne
- Abstract
The understanding of factors affecting resource uptake is important to elucidate community dynamics in aquatic ecosystems. Here, we analyzed nutrient–phytoplankton and phytoplankton–zooplankton interactions in open water areas without macrophytes and in areas with floating and submerged macrophytes in the tropical Cajueiro reservoir, semiarid Brazil. Phytoplankton species were classified into functional groups according to life form and cell size, and zooplankton species were grouped based on functional feeding groups and trophic guilds. Macrophytes favored the effect of nutrients on phytoplankton and the availability of prey for the zooplankton. In open water, unicellular and flagellated phytoplankton were positively influenced by nitrate and inorganic phosphate, while colonial, filamentous, small, medium and large phytoplankton were positively influenced by total phosphorus and nitrite. Colonial phytoplankton, mainly filamentous cyanobacteria, was positively associated with zooplankton in areas with macrophytes, while flagellated phytoplankton was negatively related to zooplankton in open water areas. Our results showed that the presence of floating and submerged macrophytes has different influences on the effect of nutrients on phytoplankton and on the effects of phytoplankton on zooplankton in Cajueiro reservoir, and this should be considered when analyzing these communities' dynamics in similar environments, i.e. tropical reservoirs.
- Subjects
BRAZIL; ZOOPLANKTON; PHYTOPLANKTON; MACROPHYTES; MARINE zooplankton; POTAMOGETON; ECOSYSTEM dynamics; PREY availability; ECOLOGICAL disturbances; FUNCTIONAL groups
- Publication
Limnology, 2024, Vol 25, Issue 1, p11
- ISSN
1439-8621
- Publication type
Article
- DOI
10.1007/s10201-023-00726-5