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Cavalli, Laurent; Miquelis, Anne; Chappaz, Rémi

doi:10.1023/a:1011977603028

Cited by 19 publications

(3 citation statements)

References 28 publications

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“…As shown in a previous study 14 , disentangling the effects of UVR and predation on the vertical distribution of copepods is difficult. Though we did not assess the predation pressure, the fish species present in the lakes are known to predate visually and to be planktivorous 36 . However, recent studies from our group on adult Salvelinus alpinus and Salmo trutta f. fario in clear lakes show that they feed mainly on insects (both terrestrial and aquatic) during the ice-free period (Sommaruga R. and Tartarotti B., unpublished data).…”

Section: Discussionmentioning

confidence: 99%

Distribution and UV protection strategies of zooplankton in clear and glacier-fed alpine lakes

Tartarotti

Trattner

Remias

et al. 2017

Sci Rep

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Zooplankton, a group of aquatic animals important as trophic link in the food web, are exposed to high levels of UV radiation (UVR) in clear alpine lakes, while in turbid glacier-fed lakes they are more protected. To study the interplay between behavioral and physiological protection responses in zooplankton from those lakes, we sampled six lakes of different UVR transparency and glacial turbidity. Copepods were absent in the upper water layers of the clearest lake, while in glacier-fed lakes they were more evenly distributed in the water column. Across all lakes, the weighted copepod mean depth was strongly related to food resources (chlorophyll a and rotifers), whereas in the fishless lakes, glacial turbidity largely explained the vertical daytime distribution of these organisms. Up to ~11-times (mean 3.5) higher concentrations of photo-protective compounds (mycosporine-like amino acids, MAAs) were found in the copepods from the clear than from the glacier-fed lakes. In contrast to carotenoid concentrations and antioxidant capacities, MAA levels were strongly related to the lake transparency. Copepods from alpine lakes rely on a combination of behavioral and physiological strategies adapted to the change in environmental conditions taking place when lakes shift from glacially turbid to clear conditions, as glacier retreat proceeds.

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Section: Discussionmentioning

confidence: 99%

Distribution and UV protection strategies of zooplankton in clear and glacier-fed alpine lakes

Tartarotti

Trattner

Remias

et al. 2017

Sci Rep

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“…The taxonomic dominance of Rotifera as reported in this study has been reported in several other water bodies. This pattern is common in tropical and subtropical freshwater, whether in lakes, ponds, reservoirs, rivers or streams (Green, 1960;Jeje and Fernando, 1986;Cavlli et al, 2001;Nugueira, 2001;Sampaio et al, 2002;Neves et al, 2003;Kudari et al, 2005;Akoma, 2008, 2009;Arimoro and Oganah, 2010;Usman et al, 2014). The species composition of zooplankton with dominance of rotifers was also observed by Olaifa and Leilei (2007) in Ekole River.…”

Section: Discussionmentioning

confidence: 62%

Composition, Abundance and Diversity Indices of Zooplankton in Lake Alau, Borno State Nigeria

Usman

2023

AJBAR

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The occurrence and abundance of zooplankton in lake Alau were documented during the rainy and dry seasons (July, 2012 to April, 2013) in station A, B, C, D and E respectively. The sampling was done in the morning before 8:00am on monthly basis. Pour-through method was used to collect the samples and analysed. A total of ten species belonging to four families were identified. The research reveals that seasonal population abundance and species composition of zooplankton envisaged Brachionidae (59.52%) as the dominant specie, followed by Asplanchidae (22.22%) Cladocera (10.76%) and Copepoda (7.50%). Throughout the study period, five species of rotifers, three species of Cladocera and two species of Copepoda were identified. Not all of the identified species were found in all the five stations, thus indicating that depth play a vital role in their vertical migration. Shannon-Weiner index showed that station A (2.021) and B (2.016) have high species diversity index compared to station C, D, and E (1.888, 1.894 and 1.875) respectively. Equitability index revealed that all the stations were within 0.908 to 0.963 ranged. Simpson’s index shows that station C (0.170) has the highest diversity index while station A and B had the same value of 0.151 as the least. Lake Alau is fairly rich in terms of zooplankton population and abundance. The presence of typical zooplankton species, notwithstanding other limnological features strongly suggests that the water body is maintaining an Oligo-mesotrophic status. More intensive study of the zooplankton species in West African arid region lakes will lead to the documentation of other species and wider distribution of many others than those that were recorded in the current study. This will lead to

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“…These biotic interactions primarily occur in the euphotic pelagic zone of the lake, where phytoplankton mainly persist (Reynolds 2006). However, pelagic food web effects on cyanobacteria are also mediated by cross‐scale interactions with large‐scale drivers like climate change (Cavalli et al 2001; Symons and Shurin 2016). Stocked fish in naturally fishless lakes can reduce the biomass of zooplankton by selectively feeding on larger taxa, releasing phytoplankton from grazing pressure in a trophic cascade (Knapp et al 2001).…”

Section: Figmentioning

confidence: 99%

Watershed, lake, and food web factors influence diazotrophic cyanobacteria in mountain lakes

Jansen,

Sobota,

Pan

et al. 2024

Limnology & Oceanography

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Cyanobacterial blooms can occur in freshwater ecosystems largely isolated from development and not experiencing extensive cultural eutrophication. For example, remote mountain lakes can experience intense blooms of diazotrophic (nitrogen‐fixing) cyanobacteria caused by factors acting at different spatial and temporal scales. In this study, we examined how cross‐scale interactions among watershed, lake, and food web characteristics influence diazotrophic cyanobacteria biovolume in mountain lakes. We quantified diazotrophic cyanobacteria biovolume, zooplankton abundance, and physico‐chemical variables for 29 lakes in the Cascade Mountains of Oregon, USA, in summer 2019. Watershed characteristics were compiled from historical datasets available for the region. Diazotrophic cyanobacteria biovolume ranged across the lakes from 0 to 1,930,000 μm3 mL−1; Dolichospermum was the most common genus. Random forest models showed that 11 watershed, lake, and food web characteristics explained 76% of the variance in diazotrophic cyanobacteria biovolume among the sampled lakes. Structural equation models suggested that the drainage ratio (i.e., the relative area of the lake to the watershed) was positively related to phosphorus concentrations and, in turn, to diazotroph biovolume. Among lakes, hypolimnetic dissolved oxygen was negatively correlated with diazotroph biovolume, possibly due to the release of nutrients, like phosphate and iron, bound to sediments. In addition, zooplankton grazers were negatively related to diazotrophic cyanobacteria biovolume, potentially reflecting the influence of stocked fish. Thus, lake management must account for bottom‐up factors, such as nutrient loading, which is influenced by lake morphometry and watershed size, as well as top‐down factors, such as fish stocking, to effectively mitigate diazotrophic cyanobacterial blooms.

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Untitled

Cited by 19 publications

References 28 publications

Distribution and UV protection strategies of zooplankton in clear and glacier-fed alpine lakes

Distribution and UV protection strategies of zooplankton in clear and glacier-fed alpine lakes

Composition, Abundance and Diversity Indices of Zooplankton in Lake Alau, Borno State Nigeria

Watershed, lake, and food web factors influence diazotrophic cyanobacteria in mountain lakes

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