Impact of two different flood pulses on planktonic communities of the largest floodplain lakes of the Daugava River (Latvia)

Paidere, Jana; Gruberts, Dāvis; Skute, Arturs; Druvietis, Ivars

doi:10.1007/s10750-007-0770-y

Cited by 37 publications

(28 citation statements)

References 25 publications

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“…Relationship between community attributes and water level: The associations of community attributes identified in this study (species richness, Shannon diversity index, evenness, and abundance) were also reported by Paidere et al (2007) and Lindholm et al (2007). These relationships characterize the behaviour of the zooplankton community according to two main scenarios: (i) at low abundances, fauna uniformly distributed, evenness increases, an increase in the diversity index is favoured, and species coexistence is promoted by minimizing competitive exclusion (Paidere et al 2007); (ii) at high abundances, few species predominate, which decreases the evenness and the diversity of species.…”

Section: Macrothrix Elegans Sars 1901 Copepodasupporting

confidence: 64%

“…These relationships characterize the behaviour of the zooplankton community according to two main scenarios: (i) at low abundances, fauna uniformly distributed, evenness increases, an increase in the diversity index is favoured, and species coexistence is promoted by minimizing competitive exclusion (Paidere et al 2007); (ii) at high abundances, few species predominate, which decreases the evenness and the diversity of species. Water level influences the community dynamic, decreasing the total abundance but increasing the diversity of species.…”

Section: Macrothrix Elegans Sars 1901 Copepodamentioning

confidence: 99%

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Intra and inter-annual structure of zooplankton communities in floodplain lakes: a long-term ecological research study

Simões

Lansac‐Tôha

Velho

et al. 2012

RBT

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Abstract:Water flow management has significantly changed the natural dynamic of floods, which are responsible for the structure and dynamic of aquatic communities in river-floodplain systems. With the aim to elaborate a conceptual framework that describes the main ecological factors associated with zooplankton community structure in the Upper Paraná River, we investigated the mechanisms that regulate the communities structure and their response to inter-annual and hydro-sedimentological variations in the floodplain and the biological factors associated with species abundance in those communities. For this we conducted samplings every six months (potamophase in March and limnophase in September) to characterize intra and inter-annual variations in community structure between 2000 and 2008. The intra-annual differences on the species richness, abundance, Shannon diversity index, and evenness, were conducted using Bayesian procedures to show probabilistic predictions of the data fit to main variation sources. Non-metric multi-dimensional scaling (NMDS), multi-response permutation procedure (MRPP), and indicator species analysis (IndVal) were run to assess and characterize the seasonality of the community structure. During high water (potamophase), hydrologic connectivity favoured exchange and dispersal of species in some lakes, increasing local diversity; during low water (limnophase), higher local productivity favoured opportunistic taxa, increasing species dominance and decreasing local diversity. Food resources and density of small-size fish were biological factors associated with the seasonal dynamic of the zooplankton community; these factors were dependent on hydrosedimentological phase (potamophase or limnophase). Water levels and limnological modifications related to water flow management have promoted replacement and impoverishment of aquatic biota in affected lakes and have indicated the ecological importance of a natural dynamic flood, which displays regular flood pulses. The conceptual model presented encompassed interactions between diverse environmental variables to more understandable mechanisms of the main sources of community variation. Rev. Biol. Trop. 60 (4): 1819-1836. Epub 2012 December 01.

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Section: Macrothrix Elegans Sars 1901 Copepodasupporting

confidence: 64%

Section: Macrothrix Elegans Sars 1901 Copepodamentioning

confidence: 99%

Intra and inter-annual structure of zooplankton communities in floodplain lakes: a long-term ecological research study

Simões

Lansac‐Tôha

Velho

et al. 2012

RBT

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“…Field surveys have been conducted on the influence of shortterm rainfall on algal blooms and the phytoplankton community. For example, Nõges et al (2011) showed that precipitation increased nutrient levels and algal biomass in Lake Varese and Paidere et al (2007) reported that floods increased phytoplankton diversity and decreased phytoplankton biomass in two floodplain lakes. In addition, the effects of nutrients on phytoplankton communities have been compared among different water bodies in the same area: Gikuma-Njuru et al (2013) revealed that the Nyanza Gulf of Lake Victoria was P-deficient and dominated by non-nitrogen-fixing cyanobacteria, whereas Lake Victoria as a whole was N-deficient and occupied by diazotrophic cyanobacteria and diatoms.…”

Section: Introductionmentioning

confidence: 99%

Differences in phytoplankton dynamics and community structure between a wet year and dry year in the Zhoucun Reservoir

Qiu

Zeng

2016

Journal of Freshwater Ecology

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Rainfall-induced nutrient fluctuations in surface water affect phytoplankton communities and cause algal blooms. To examine this influence in the Zhoucun Reservoir, China, field surveys were performed weekly or biweekly from February 2013 (a wet year) to December 2014 (a dry year). Physical conditions, nutrient levels, and phytoplankton functional groups were investigated during monitoring. Nutrient levels increased in the summer of 2013 (TN: 0.85À2.66 mg/L; TP: 0.037À0.138 mg/L), while nitrogen deficiency occurred in the summer of 2014 (TN: 0.38À0.73 mg/L, TP: 0.044À0.079 mg/L). A cyanobacteria bloom that appeared in the summer of 2013 had the dominant phytoplankton functional groups M and Tc. In the summer of 2014, algal cell density and biomass were much lower than those during the corresponding period in 2013, and the co-dominant phytoplankton groups were F, L 0 , Tc, and S2. Non-N-fixing cyanobacteria were not abundant in summer 2013 probably because of the low ratio of NO 3 ¡ to NH 4 C , although nitrogen was also deficient. In contrast to these summer trends, little difference was noted between phytoplankton dynamics and community structure in the two winters and two springs, regardless of nutrient conditions. Redundancy analysis indicated that rainfall-induced nitrogen fluctuations were the primary factor causing phytoplankton dynamics to differ between the wet and dry year. The effects of water temperature, stratification, and light on the phytoplankton community were independent of nutrient fluctuations. This study shows that rainfall fluctuations change summer nutrient conditions and that cyanobacteria blooms are likely to occur in wet years in the Zhoucun Reservoir.

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“…Cryptomonads are also able to better capture nutrients because of their ability to mixotrophy (Jones 2000). Dominant Cryptophyta are common in many oxbow lakes (Paidere et al 2007;Pithart et al 2007;BovoScomparin and Train 2008;Krasznai et al 2010), which may be due to their high tolerance to different trophic conditions and resistance to shade in the water column. Cryptomonads are very sensitive to predation by zooplankton communities (Reynolds et al 2002;Reynolds 2006;Padisák et al 2009).…”

Section: Macrophytesmentioning

confidence: 99%

Seasonal variation in phytoplankton and aquatic plants in floodplain lakes (lower Vistula River, Poland)

Dembowska

2015

Wetlands Ecol Manage

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The study focused on three oxbow lakes which have been isolated from the water of the Vistula River for several years. The diversity of phytoplankton communities was observed biweekly in the growing season (April-October), both in the three floodplain lakes along the lower Vistula River (northern Poland) and in the main current of the river. The water level in the Vistula River remained low, so the lakes were not filled with the surface water of the river. Different phytoplankton communities occurred in the studied lakes compared to the Vistula River. The phytoplankton in the oxbow lakes consisted mainly of small unicellular and colonial flagellates: Cryptomonas, Chlamydomonas, Trachelomonas, and Dinobryon. During the limnophase, only 2-3 species co-dominated, and the reservoirs were in a stable water conditions. The river phytoplankton had both higher diversity and higher abundance compared to the floodplain lakes. In total, 4-8 species co-dominated in the river, usually Chlorococcales and diatoms. The floodplain lakes were characterized by unexpected differences in the quality, quantity, and dynamics of planktonic algae. The differences were strictly associated with the occurrence of macrophytes. During the limnophase, the investigated oxbow lakes were also diversified in terms of colonizing plant communities. Different types of vegetation-free floating plants (W-1 lake), communities of submerged macrophytes, free floating plants and algal mats detached from the bottom (W-2 lake), and submerged macrophytes (Ma lake), affected the development of the microflora to a varying extent.

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Impact of two different flood pulses on planktonic communities of the largest floodplain lakes of the Daugava River (Latvia)

Cited by 37 publications

References 25 publications

Intra and inter-annual structure of zooplankton communities in floodplain lakes: a long-term ecological research study

Intra and inter-annual structure of zooplankton communities in floodplain lakes: a long-term ecological research study

Differences in phytoplankton dynamics and community structure between a wet year and dry year in the Zhoucun Reservoir

Seasonal variation in phytoplankton and aquatic plants in floodplain lakes (lower Vistula River, Poland)

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