Horizontal Distribution of Benthic Macroinvertebrates in Lake Kizaki, Japan.

Hirabayashi, Kimio; Yoshizawa, Kazuya; Horiuchi, Masato

doi:10.3739/rikusui.55.105

Cited by 13 publications

(16 citation statements)

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“…Hirabayashi & Hayashi (1994) showed that in 1985 the average density of aquatic oligochaetes was 435 ± 428 individuals m -2 , oligochaetes dominated in only four locations and were distributed over the whole lake approximately equally (> 20 m depth stations; IL was 12.0 ± 1.5%). In our results, the average density of aquatic oligochaetes was 10424 ± 5346 individuals m -2 , oligochaetes dominated at all stations (> 20 m depth stations; IL was 14.3 ± 0.7%) and oligochaete densities increased greatly (ca.…”

Section: Discussionmentioning

confidence: 99%

“…We compared our results with those of Hirabayashi & Hayashi (1994), and tried to clarify the relationship between the change of the organic matter contents (IL) of the sediments and the densities of the total oligochaetes in Lake Kizaki. Hirabayashi & Hayashi (1994) showed that in 1985 the average density of aquatic oligochaetes was 435 ± 428 individuals m -2 , oligochaetes dominated in only four locations and were distributed over the whole lake approximately equally (> 20 m depth stations; IL was 12.0 ± 1.5%).…”

Section: Discussionmentioning

confidence: 99%

“…Aizaki et al (1981) ranked this lake as mesotrophic, using the modified Carlson's trophic state index based on chlorophyll-a, total phosphorus, and transparency. Such an alteration of the lake environment must have caused some changes in the bottom fauna, especially dominant Chironomidae and Oligochaeta (Hirabayashi & Hayashi 1994;Hirabayashi et al 2007).…”

Section: Study Sitementioning

confidence: 99%

“…Kitagawa (1973) and Hirabayashi & Hayashi (1994) reported on the horizontal distribution of total aquatic Oligochaeta. However, their studies left something to be desired from the ecological point of view.…”

Section: Introductionmentioning

confidence: 99%

“…An earlier study by Hirabayashi & Hayashi (1994) showed that in 1985 the average density of aquatic oligochaetes was 435 ± 428 individuals m -2 , oligochaetes dominated in only four locations and were distributed over the whole lake approximately equally. Comparisons of our data with the earlier studies have shown that oligochaete density has increased greatly according to Hirabayashi & Hayashi (1994). We suggest that a decrease in dissolved oxygen concentration of bottom water was due to an increase in organic matter content of the sediment.…”

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confidence: 99%

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<strong>Bathymetric distribution of aquatic Oligochaeta in Lake Kizaki, Central Japan</strong>

2014

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Bathymetric distribution of aquatic oligochaetes was studied at 8 stations with different depths (mean depth 16.7 ± 9.4 m, min. 5.3 m, max. 29.4 m) in July 2012 in mesotrophic Lake Kizaki, Nagano Prefecture, Central Japan. The average density was 10424 ± 5346 individuals m -2 . Oligochaetes were numerically dominant at all sampling stations. High density, sometimes more than 10000 individuals m -2 , was recorded at 3 stations (St. 4, 5, and 6) deeper than 18 m.Maximum density was 20561 ± 13864 individuals m -2 at Station 4 (depth 29.4 m, ignition loss of sediment 13.5%, bottom water temperature 8.1 °C and DO of bottom water 0.12 mg l -1 ). We identified a total of 5 genera and 7 species belonging to three subfamilies: i.e., 1 species of Naidinae, 2 species of Rhyacodrilinae and 4 species of Tubificinae. Dominant species (in order of abundance) were Tubifex tubifex (Müller, 1774) (8550 ± 6317 individuals m -2 ; 82.0%) andLimnodrilus spp. (L. hoffmeisteri Claparède, 1862 and L. claparedeianus Ratzel, 1868) (1710 ± 1383 individuals m -2 ; 16.4%). Tubifex and Limnodrilus were obtained from every station, and the density of T. tubifex tended to be higher as the depth became greater, while Limnodrilus spp. was also widely distributed, but with a peak value at a depth of 5.3 m in the shallowest station. From the submerged plant zone, Ophidonais serpentina (Müller, 1773) was collected. An earlier study by Hirabayashi & Hayashi (1994) showed that in 1985 the average density of aquatic oligochaetes was 435 ± 428 individuals m -2 , oligochaetes dominated in only four locations and were distributed over the whole lake approximately equally. Comparisons of our data with the earlier studies have shown that oligochaete density has increased greatly according to Hirabayashi & Hayashi (1994). We suggest that a decrease in dissolved oxygen concentration of bottom water was due to an increase in organic matter content of the sediment. As a result, T. tubifex could expand their habitats in the profundal zone.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Study Sitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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<strong>Bathymetric distribution of aquatic Oligochaeta in Lake Kizaki, Central Japan</strong>

2014

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Variability of benthic methane‐derived carbon along seasonal, biological, and sedimentary gradients in a polymictic lake

Tsuchiya

Komatsu

Shinohara

et al. 2020

Limnology & Oceanography

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The spatial and seasonal variations of methane-derived carbon contributions to Chironomus plumosus larvae and oligochaetes biomass at four stations in a polymictic, eutrophic lake were examined to determine which factors (CH 4 and/or dissolved oxygen) affect the methane-derived carbon contributions, and quantify impacts of benthic methane-derived carbon on the lake food web. Methane-derived carbon contributions were estimated by a two-source mixing model using δ 13 C values of monthly particulate organic matter (−29.5 to −20.8‰) and methane-oxidizing bacteria (−85.7‰). Large spatial and seasonal variability of methane-derived carbon contributions to C. plumosus and oligochaetes within the lake (0-38% and 0-32%, respectively) were observed, where contributions varied spatially along a gradient of sediment CH 4 concentration, but not dissolved oxygen. The results suggest that for both C. plumosus and oligochaetes, spatial variabilities of the methane-derived carbon contributions are regulated by CH 4. Seasonal variability of methane-derived carbon contributions to C. plumosus revealed increases in summer and autumn following increases in CH 4. Methane-derived biomass (methanederived carbon% × biomass) of C. plumosus were also higher in summer and autumn, suggesting transfer of methane-derived carbon to higher trophic organisms may be larger during those seasons, and limited in winter and spring. Although oligochaetes did not show seasonal variability of methane-derived carbon contributions, they provided a consistent source of methane-derived biomass to higher trophic levels throughout the year. Our study demonstrates that two major macroinvertebrates complementarily contribute to fueling methane-derived carbon cycling through trophic transfer in a polymictic lake.

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Sulfate reduction in profundal sediments in Lake Kizaki, Japan

Takii

Kotakemori

et al. 1996

Hydrobiologia

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The sulfate reduction rate was measured for almost four years in the profundal sediments of Lake Kizaki, a mesotrophic lake in central Japan. The rate was generally highest in the surface layer and decreased with depth. Seasonally, sulfate reduction tended to be high in spring and summer, and then to decrease until the end of stratification (December) in spite of a constant in situ temperature of around 6 "C, although fluctuations were found in every year. The rate also fluctuated greatly according to year. The maximum rate of sulfate reduction was 0.33 mmol mm2 d-l in May, 1990, and the minimum was 0.004 mmol m-' d-l in March, 1993. These relatively low rates, compared with those reported for freshwater sediments, seem to be due to low concentrations of sulfate in the sediments (5-23 pmol 1-l in the surface layer) . The rate was highly correlated with the concentration of sulfate in the sediments. The addition of sulfate stimulated sulfate reduction in all sediment samples tested, but adding lactate did not. Therefore, sulfate reduction should be limited mainly by the supply of sulfate. Measurements of sulfate reduction rates at different concentrations of added sulfate revealed a low concentration of half-saturation constant as low as 12 pm01 1-l.

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Horizontal Distribution of Benthic Macroinvertebrates in Lake Kizaki, Japan.

Cited by 13 publications

References 3 publications

<strong>Bathymetric distribution of aquatic Oligochaeta in Lake Kizaki, Central Japan</strong>

<strong>Bathymetric distribution of aquatic Oligochaeta in Lake Kizaki, Central Japan</strong>

Variability of benthic methane‐derived carbon along seasonal, biological, and sedimentary gradients in a polymictic lake

Sulfate reduction in profundal sediments in Lake Kizaki, Japan

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