Anthropogenic and climate forcing on the long-term changes of planktonic rotifers in Lake Geneva, Europe

Molinero, Juan Carlos; Anneville, Orlane; Souissi, Sami; Balvay, Gérard; Gerdeau×, Daniel

doi:10.1093/plankt/fbi110

Cited by 29 publications

(28 citation statements)

References 31 publications

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“…In addition, rotifers exhibited changes in taxonomic composition during the study period, Polyarthra, Pompholyx and Keratella being the genera mainly responsible for the among-year differences. Despite this, the total biomass and size structure of rotifers exhibited no significant changes, which somehow contradict previous works in which the total biomass of rotifers and small size classes were found to increase as a consequence of warming [58].…”

Section: Discussioncontrasting

confidence: 99%

“…However, other changes are contrary to expectations, particularly those related to zooplankton composition and size structure, suggesting that warming and nutrient loading reduction have interactive rather than independent effects on zooplankton dynamics. Other studies have also reported complex interactions of temperature and nutrient decrease on different groups of zooplankton [35,58,59].…”

Section: Discussionmentioning

confidence: 95%

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Is Recovery of Large-Bodied Zooplankton after Nutrient Loading Reduction Hampered by Climate Warming? A Long-Term Study of Shallow Hypertrophic Lake Søbygaard, Denmark

Gutiérrez

Devercelli

Brucet

et al. 2016

Water

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Nutrient fluctuations and climate warming can synergistically affect trophic dynamics in lakes, resulting in enhanced symptoms of eutrophication, thereby potentially counteracting restoration measures. We performed a long-term study (23 years) of zooplankton in Danish Lake Søbygaard, which is in recovery after nutrient loading reduction, but now faces the effects of climate warming. We hypothesized that the recovery of large-bodied zooplankton after nutrient loading reduction would be hampered by climate warming through indirect effects on fish size structure. We found a shift in macrozooplankton from initial dominance of Daphnia spp. towards Bosmina spp. as well as a decline in the body size of copepods and an increase in the abundance of nauplii. These changes coincided with the increase in small sized fish as a result of rising water temperature. Despite a reduction in body size, the total biomass of cladocerans increased coinciding with a diminished fish catch per unit effort (CPUE), and likely then an overall reduction in the predation on zooplankton. A cascading effect to phytoplankton was evidenced by enhanced zooplankton:phytoplankton and cladoceran:phytoplankton ratios and a decrease in Chl-a:TP and Chl-a:TN ratios. Our results indicate that climate warming, through changes in the size structure of fish community, has major effects on zooplankton size structure. In Lake Søbygaard, the decline in zooplankton size did not prevent, but modulated, the positive cascading effect on phytoplankton through an expected diminished fish CPUE related to nutrient loading reduction.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 95%

Is Recovery of Large-Bodied Zooplankton after Nutrient Loading Reduction Hampered by Climate Warming? A Long-Term Study of Shallow Hypertrophic Lake Søbygaard, Denmark

Gutiérrez

Devercelli

Brucet

et al. 2016

Water

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“…InŘímov Reservoir, perch did not spawn in layers of complete darkness starting around the depth of 6 m. Contrary to that, in Chabařovice Lake where the light penetrates to three times greater depth perch frequently spawn to a depth of 12 m or even deeper. Based on the recent knowledge it could be concluded that overall oligotrophication and warming of European inland waters (Molinero et al, 2006) will, in the near future, force perch to spawn in deeper and deeper water. At least in lakes and reservoirs, this would make the studies of perch reproduction success even more difficult, forcing SCUBA divers to also monitor depths of over 20 m to get a true picture of the real depth distribution, size and numbers of spawned egg strands (Čech et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

Extremely shallow spawning of perch (Perca fluviatilisL.) : the roles of sheltered bays, dense semi-terrestrial vegetation and low visibility in deeper water

Čech

Peterka

Říha

et al. 2012

Knowl. Managt. Aquatic Ecosyst.

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Key-words:Rímov Reservoir, Chabařovice Lake, SCUBA diving, Reed canarygrass Phalaris arudinacea, Goat willow Salix caprea, egg strandsThe roles of wind protected bays, presence of littoral vegetation and light attenuation in the water column on spawning site selection and depth of egg strands deposition by perch Perca fluviatilis was studied inŘímov Reservoir, Czech Republic, in the years 2007 and 2011 using boat observation and SCUBA divers. The data were compared with results from Chabařovice Lake, Czech Republic, where similar monitoring took place in 2007−2010 and 2012. In shallow water ofŘímov Reservoir, the density of egg strands was significantly higher in grass bays compared to both rocky bays and the main reservoir body. Most egg strands were deposited in water less than 0.5 m deep on reed canarygrass Phalaris arudinacea. In year when the littoral vegetation was absent perch were forced to spawn significantly deeper on various types of woody structures. InŘímov Reservoir, which is less vulnerable to wind, 91.1% of egg strands were spawned in water 3 m deep. In contrast, in the wind exposed Chabařovice Lake, even in the presence of littoral vegetation, 90.5% of egg strands were found at depths greater than 3 m. In Chabařovice Lake, the light penetrated to three times greater depth compared toŘímov Reservoir and, similarly, the depth limit to which 95% of egg strands were spawned was three times greater in this lake compared toŘímov Reservoir. This study is the first contribution showing the role of water transparency in controlling the depth distribution of perch egg strands in lakes and reservoirs. En revanche, dans le lac Chabařovice exposé au vent, même en présence la végétation littorale, 90,5 % des rubans d'oeufs ont été trouvés à des profondeurs supérieures à 3 m. Dans le lac Chabařovice, la lumière pénètre trois fois plus en profondeur que dans le réservoirŘímov et, de même, la limite de la profondeur à laquelle 95 % des rubans d'oeufs ont été déposés était trois fois plus élevée dans ce lac que dans le réservoirŘímov. Cette étude est la première contribution montrant le rôle de la transparence de l'eau dans le contrôle de la distribution en profondeur des rubans d'oeufs de perche dans les lacs et les réservoirs.

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“…Freshwater rotifers within the zooplankton community play an important role as grazers of phytoplankton (Herzig, 1987). They are an essential component in the freshwater plankton food web and exist in high density in lakes, reservoirs and rivers, outnumbering other groups of mesozooplankton (Rodríguez & Matsumura-Tundisi, 2000;Molinero et al, 2006). The outbreak of phytoplankton can have impacts on rotifer community.…”

Section: Introductionmentioning

confidence: 99%

Daily and vertical dynamics of rotifers under the impact of diatom blooms in the Three Gorges Reservoir, China

Zhou

Cai

et al. 2011

Hydrobiologia

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The Three Gorges Dam was built in 2005 with a storage capacity of 39.3 billion m 3 , ranking 22nd in the world. However, since the impoundment of the reservoir, serious blooms of phytoplankton have occurred. Rotifers, having a key role in the freshwater aquatic food web, are important grazers of phytoplankton and an essential food resource to higher trophic consumers. To explore the impacts of phytoplankton blooms on the rotifer community, daily and vertical surveys of rotifers were conducted in a bay of the Three Gorges Reservoir (Xiangxi Bay). Altogether 46 rotifer species were registered, and Synchaeta tremula, Polyarthra vulgaris, and Brachionus calyciflorus were the most abundant species accounting for 36, 26, and 16% of the mean rotifer densities, respectively. Although these dominant species always prevailed in the rotifer community, their proportions changed significantly from non-bloom phase to bloom phase, e.g., the significance of S. tremula deceased from 46.8 to 33.2%, while P. vulgaris and B. calyciflorus increased from 23.9 and 13.9% to 26.2 and 16.2%, respectively. In the vertical water column, all the rotifer following phytoplankton displayed an aggregated distribution, concentrating at the upper layers (0.5-5 m), especially during the bloom phase. From the non-bloom phase to the bloom phase, rotifer densities, the dominant rotifers, Shannon-Wiener and Margalef's diversity increased significantly, while the evenness displayed the opposite trend. Non-metric multidimensional scaling analysis (NMDS) revealed that the samples in the non-bloom phase were well separated from those in the bloom phase. This means that the outbreak of the diatom bloom in the Xiangxi Bay had significant impacts on the rotifer community. Further investigations are needed to address the impacts of the changes of rotifer community on higher trophic levels.

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Anthropogenic and climate forcing on the long-term changes of planktonic rotifers in Lake Geneva, Europe

Cited by 29 publications

References 31 publications

Is Recovery of Large-Bodied Zooplankton after Nutrient Loading Reduction Hampered by Climate Warming? A Long-Term Study of Shallow Hypertrophic Lake Søbygaard, Denmark

Is Recovery of Large-Bodied Zooplankton after Nutrient Loading Reduction Hampered by Climate Warming? A Long-Term Study of Shallow Hypertrophic Lake Søbygaard, Denmark

Extremely shallow spawning of perch (Perca fluviatilisL.) : the roles of sheltered bays, dense semi-terrestrial vegetation and low visibility in deeper water

Daily and vertical dynamics of rotifers under the impact of diatom blooms in the Three Gorges Reservoir, China

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