Methods for quantitative sampling of epiphytic microinvertebrates in lake vegetation

Sakuma, Masataka; Hanazato, Takayuki; Nakazato, Ryoji; Haga, Hiroki

doi:10.1007/s102010200013

Cited by 25 publications

(25 citation statements)

References 9 publications

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“…We stored the sampled water (including any macrophytes collected) in a tank. The collected macrophytes were shaken in the tank to detach zooplankton (Sakuma et al 2002), and macrophytes were then removed from the tank. The volume of the remaining water sample (containing zooplankton from both the water column and macrophytes) was measured to calculate zooplankton density and was filtered through a plankton net (32-µm mesh) The filtrate was preserved in formaldehyde (final concentration approximately 5%).…”

Section: Methodsmentioning

confidence: 99%

Effect of removal of free-floating macrophytes on zooplankton habitat in shallow wetland

Choi

Jeong

et al. 2014

Knowl. Managt. Aquatic Ecosyst.

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Key-words:submerged macrophyte, macrophyte habitat, zooplankton, species diversity, shallow wetland Submerged macrophytes improve the structural heterogeneity of microhabitats in aquatic ecosystems, often providing an important habitat for zooplankton. However, excessive development of free-floating macrophytes on the water surface can reduce the biomass of submerged macrophytes and result in a relatively simple habitat structure. We hypothesized that controlling the development of free-floating macrophytes would result in a more complex habitat structure by promoting the development of submerged macrophytes. After applying three experimental treatments (NR, no removal; IR, intermediate removal; CR, complete removal of free-floating macrophytes), we found that CR of free-floating macrophytes improved the growth and development of submerged macrophytes and supported a large zooplankton assemblage. However, the largest zooplankton assemblage (in terms of abundance and diversity) was recorded after the IR treatment. Although submerged macrophytes were abundant in the CR treatment, the number, abundance, and density of zooplankton species were much lower than those in the IR treatment. Preferential selection of different macrophyte types by zooplankton presumably led to variation in plant utilization of niches, and the simultaneous presence of different macrophyte life forms created a complex microhabitat structure that induced high species diversity and zooplankton density. RÉSUMÉEffet du retrait des macrophytes flottants sur l'habitat du zooplancton dans les zones humides peu profondes Mots-clés :macrophytes submergés, habitat des macrophytes, Les macrophytes submergés améliorent l'hétérogénéité structurelle des microhabitats dans les écosystèmes aquatiques, offrant souvent un habitat important pour le zooplancton. Cependant, le développement excessif des macrophytes flottants à la surface de l'eau peut réduire la biomasse des macrophytes submergés et aboutir à une structure de l'habitat relativement simple. Nous avons supposé que le contrôle du développement des macrophytes flottants se traduirait par une structure de l'habitat plus complexe en favorisant le développement des zooplancton, diversité des espèces, zones humides peu profondes macrophytes submergés. Après l'application de trois traitements expérimentaux (pas de suppression, suppression intermédiaire, et la suppression complète des macrophytes flottants), nous avons constaté que l'élimination complète des macrophytes flottants améliore la croissance et le développement des macrophytes submergés et favorise un important assemblage de zooplancton. Cependant, la plus grande communauté de zooplancton (en termes d'abondance et de diversité) a été constatée après le traitement de suppression intermédiaire. Bien que les macrophytes submergés soient abondants dans le traitement de suppression complète, le nombre, l'abondance et la densité des espèces de zooplancton ont été beaucoup plus faibles que dans le traitement de suppression intermédiaire. Une ...

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Section: Methodsmentioning

confidence: 99%

Effect of removal of free-floating macrophytes on zooplankton habitat in shallow wetland

Choi

Jeong

et al. 2014

Knowl. Managt. Aquatic Ecosyst.

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“…There are no standardized methods for collection of data in studies of microcrustacean fauna in wetlands, and different sampling techniques have been used (see Campbell et al, 1982;Sakuma et al, 2002;Ferreira et al, 2008;Loutte et al, 2008;Maia-Barbosa et al, 2008;Kruk et al, 2009). The usage of the same sampling method is an important strategy, since the lack of standardization in Table 1 for code names of the wetlands.…”

Section: Discussionmentioning

confidence: 99%

“…and Hydrolea ovata. Sakuma et al (2002) suggested two methods based on sampling of submerged macrophytes using bottles to obtain the phytophilous fauna. Ferreira et al (2008) used three different methods to sample environments dominated by macrophytes (Jar, Manual Removal and Ekman Dredge) and concluded that the abundance and richness of the biota groups were dependent of the method used.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a new sampling method for assessing Cladocera richness (Crustacea, Branchiopoda) in macrophyte-rich wetlands

Sousa

Elmoor-Loureiro

Mendonça-Galvão

et al. 2014

Ann. Limnol. - Int. J. Lim.

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-The wetlands found in the Brazilian Cerrado are poorly studied environments regarding ecological aspects. Assessing the diversity of aquatic invertebrates in wetlands is a challenging task, since there are no standard sampling methods that minimize the spatial effects caused by macrophytes. The aim of this study was to evaluate the efficiency of a new sampling method for assessing Cladocera richness in macrophyte-rich wetlands of Brazilian Cerrado. In six wetlands, one transect was established which corresponded to a gradient of depth or change in aquatic vegetation. Samples containing cladocerans were collected using plankton net dragged among aquatic vegetation in the dry and rainy seasons. The species accumulation curves using non-parametric estimators and the overestimation of richness were used to determine the sampling efficiency. The species accumulation curves showed different asymptotic trends regarding the season and wetland studied. Especially in the rainy season, an asymptotic trend was not observed in two of the wetlands studied, which may reflect the influence of seasonality on Cladocera assemblage. Nevertheless, the overestimation of species richness showed that the method of sampling was able to find more than 60% of the estimated species richness, regardless of season or wetland studied. These results indicate that the method employed for sampling Cladocera in the Cerrado wetlands can be considered adequate.

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“…According to Sakuma et al (2002), vegetation areas in the littoral region of lakes have rich biodiversity. This is because aquatic macrophytes provide a habitat and refuge for many organisms in addition to providing greater environmental heterogeneity (Nogueira et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Cladocera (Crustacea, Branchiopoda) of a temporary shallow pond in the Caatinga of Pernambuco, Brazil

et al. 2013

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-The aim of this study was to describe the composition and structure of cladocerans of littoral areas with and without macrophytes from a temporary shallow pond in the Caatinga of Pernambuco state (Brazil). Samples were taken between June 2011 and August 2012. The sampling of cladocerans and environmental variables was performed at four fixed points, using a plankton net (45 μm) and a multiparameter probe. Twenty-two cladoceran species were recorded, with two new occurrences for Pernambuco state: Chydorus cf. brevilabris and Macrothrix superaculeata. The species richness of non-planktonic cladocerans (16) was higher than that of planktonic ones (4). The mean density was 186.7 ± 273.6 ind. L -1 . Macrothrix elegans, Diaphanosoma spinulosum and Ephemeroporus hybridus were the most abundant. The fluctuation index of the main species showed greater instability during the driest months or greater rainfall, a pattern not observed for the environmental data. However, the pond did not show limnological and cladoceran structure differences between the dry and rainy seasons and between the areas with and without macrophytes. With the exception of temperature and rainfall, the structure and richness of cladocerans was not related to the fluctuation of the other variables. Warmer months had higher densities and richness of cladocerans. On the other hand, months of greatest rainfall had lower richness, especially for the Chydoridae family. Although this Caatinga pond is maintained exclusively by rainwater, the richness of cladocerans is high when compared to other tropical and subtropical ecosystems. These results suggest that rainfall and temperature exert greater control on the dynamics of cladocerans in the Caatinga's temporary shallow ponds, and demonstrate the importance of these ecosystems to biodiversity in the semiarid region.

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Methods for quantitative sampling of epiphytic microinvertebrates in lake vegetation

Cited by 25 publications

References 9 publications

Effect of removal of free-floating macrophytes on zooplankton habitat in shallow wetland

Effect of removal of free-floating macrophytes on zooplankton habitat in shallow wetland

Evaluation of a new sampling method for assessing Cladocera richness (Crustacea, Branchiopoda) in macrophyte-rich wetlands

Cladocera (Crustacea, Branchiopoda) of a temporary shallow pond in the Caatinga of Pernambuco, Brazil

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