Sustainment of epiphytic microinvertebrate assemblage in relation with different aquatic plant microhabitats in freshwater wetlands (South Korea)

Choi, Jong‐Yun; Jeong, Kwang‐Seuk; La, Geung-Hwan; Kim, Seong‐Ki; Joo, Gea‐Jae

doi:10.4081/jlimnol.2014.736

Cited by 27 publications

(16 citation statements)

References 28 publications

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“…Pelagic species use macrophytes mainly to avoid predators, because complex macrophyte colonies reduce predators’ foraging ability, resulting in increased pelagic prey species assemblages (Kuczyńska‐Kippen and Nagengast, ). In contrast, epiphytic rotifers used macrophytes not only as a refuge but also as their habitat space (Sakuma et al, ; Choi et al, ). The distinguishable macrophyte use pattern leads to different responses to rainfall, and affects their seasonal distribution.…”

Section: Discussionmentioning

confidence: 99%

Rainfall as dominant driver of rotifer dynamics in shallow wetlands: Evidence from a long‐term data record (Upo Wetlands, South Korea)

Choi

Jeong

Joo

2015

Internat. Rev. Hydrobiol.

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In this study, we explain the environmental variables that mainly influence the seasonal pattern of rotifer communities in shallow wetlands (Upo Wetlands, South Korea). Long-term data (n ¼ 197, 2006-2013) were used to analyze the patterns by means of a self-organizing map (SOM), which extracts information through competitive and adaptive properties. A total of 32 variables (24 groups of rotifers and 8 environmental variables) were patterned onto the SOM, and then each variable was compared in accordance with four seasonal patterns. Three clusters were categorized according to the Euclidian distance between the clusters on the SOM, and these were interpreted in relation to seasonal features. Using the SOM, the rotifer groups were clearly distinguished by water temperature and rainfall. In particular, pelagic rotifer groups (Brachionus,Keratella, and Polyarthra) were less abundant when high rainfall occurred, but epiphytic rotifers (Lepadella, Leacne, and Monostyla) were strongly associated with high rainfall. Moreover, strong rainfall occurring on several consecutive days increased the rotifer abundance on macrophytes. The SOM results depicted a clear pattern of rotifer density clusters partitioned by rainfall, which determined the seasonal distribution of rotifer groups in a shallow wetland.

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Section: Discussionmentioning

confidence: 99%

Rainfall as dominant driver of rotifer dynamics in shallow wetlands: Evidence from a long‐term data record (Upo Wetlands, South Korea)

Choi

Jeong

Joo

2015

Internat. Rev. Hydrobiol.

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“…Some epiphytic zooplankton species often reside on free-floating and/or floatingleaved macrophytes (Moss et al 1998, Choi et al 2014a; however, the pattern of macrophyte utilization by this group remains unclear, with their abundance often being underestimated. Previous research on epiphytic zooplankton distribution has focused on explaining the causal relationships among macrophytes, epiphytic species, and other environmental factors (such as predation and food availability), indicating the importance of macrophyte type.…”

Section: Study Sitesmentioning

confidence: 99%

Detecting response patterns of zooplankton to environmental parameters in shallow freshwater wetlands: discovery of the role of macrophytes as microhabitat for epiphytic zooplankton

Choi¹,

Kim²,

Jeng³

et al. 2015

J. Ecol. Environ.

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Freshwater macrophytes improve the structural heterogeneity of microhabitats in water, often providing an important habitat for zooplankton. Some studies have focused on the overall influence of macrophytes on zooplankton, but the effects of macrophyte in relation to different habitat characteristics of zooplankton (e.g., epiphytic and pelagic) have not been intensively studied. We hypothesized that different habitat structures (i.e., macrophyte habitat) would strongly affect zooplankton distribution. We investigated zooplankton density and diversity, macrophyte characteristics (dry weight and species number), and environmental parameters in 40 shallow wetlands in South Korea. Patterns in the data were analyzed using a self-organizing map (SOM), which extracts information through competitive and adaptive properties. A total of 20 variables (11 environmental parameters and 9 zooplankton groups) were patterned onto the SOM. Based on a U-matrix, 3 clusters were identified from the model. Zooplankton assemblages were positively related to macrophyte characteristics (i.e., dry weight and species number). In particular, epiphytic species (i.e., epiphytic rotifers and cladocerans) exhibited a clear relationship with macrophyte characteristics, while large biomass and greater numbers of macrophyte species supported high zooplankton assemblages. Consequently, habitat heterogeneity in the macrophyte bed was recognized as an important factor to determine zooplankton distribution, particularly in epiphytic species. The results indicate that macrophytes are critical for heterogeneity in lentic freshwater ecosystems, and the inclusion of diverse plant species in wetland construction or restoration schemes is expected to generate ecologically healthy food webs.

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“…However, some reports have claimed that submerged macrophytes were mainly used by pelagic zooplankton, such as daphnids, as their daytime refuge (Lauridsen and Lodge, 1996;Burk et al, 2002), and that a large number of zooplankton species often inhabit floating-leaved or free-floating macrophytes. Moss et al (1998) and Choi et al (2014b) suggested that some epiphytic zooplankton species could attain high biomass in floating-leaved macrophyte beds. The increase in zooplankton abundance and species number after IR treatment can be explained by this dynamic.…”

Section: Taxamentioning

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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Sustainment of epiphytic microinvertebrate assemblage in relation with different aquatic plant microhabitats in freshwater wetlands (South Korea)

Abstract: In

Cited by 27 publications

References 28 publications

Rainfall as dominant driver of rotifer dynamics in shallow wetlands: Evidence from a long‐term data record (Upo Wetlands, South Korea)

Rainfall as dominant driver of rotifer dynamics in shallow wetlands: Evidence from a long‐term data record (Upo Wetlands, South Korea)

Detecting response patterns of zooplankton to environmental parameters in shallow freshwater wetlands: discovery of the role of macrophytes as microhabitat for epiphytic zooplankton

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

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