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291 results on '"Ban, Syuhei"'

4. Global data set of long-term summertime vertical temperature profiles in 153 lakes

Author

Pilla, Rachel M, Mette, Elizabeth M, Williamson, Craig E, Adamovich, Boris V, Adrian, Rita, Anneville, Orlane, Balseiro, Esteban, Ban, Syuhei, Chandra, Sudeep, Colom-Montero, William, Devlin, Shawn P, Dix, Margaret A, Dokulil, Martin T, Feldsine, Natalie A, Feuchtmayr, Heidrun, Fogarty, Natalie K, Gaiser, Evelyn E, Girdner, Scott F, González, María J, Hambright, K David, Hamilton, David P, Havens, Karl, Hessen, Dag O, Hetzenauer, Harald, Higgins, Scott N, Huttula, Timo H, Huuskonen, Hannu, Isles, Peter DF, Joehnk, Klaus D, Keller, Wendel Bill, Klug, Jen, Knoll, Lesley B, Korhonen, Johanna, Korovchinsky, Nikolai M, Köster, Oliver, Kraemer, Benjamin M, Leavitt, Peter R, Leoni, Barbara, Lepori, Fabio, Lepskaya, Ekaterina V, Lottig, Noah R, Luger, Martin S, Maberly, Stephen C, MacIntyre, Sally, McBride, Chris, McIntyre, Peter, Melles, Stephanie J, Modenutti, Beatriz, Müller-Navarra, Dörthe C, Pacholski, Laura, Paterson, Andrew M, Pierson, Don C, Pislegina, Helen V, Plisnier, Pierre-Denis, Richardson, David C, Rimmer, Alon, Rogora, Michela, Rogozin, Denis Y, Rusak, James A, Rusanovskaya, Olga O, Sadro, Steve, Salmaso, Nico, Saros, Jasmine E, Sarvala, Jouko, Saulnier-Talbot, Émilie, Schindler, Daniel E, Shimaraeva, Svetlana V, Silow, Eugene A, Sitoki, Lewis M, Sommaruga, Ruben, Straile, Dietmar, Strock, Kristin E, Swain, Hilary, Tallant, Jason M, Thiery, Wim, Timofeyev, Maxim A, Tolomeev, Alexander P, Tominaga, Koji, Vanni, Michael J, Verburg, Piet, Vinebrooke, Rolf D, Wanzenböck, Josef, Weathers, Kathleen, Weyhenmeyer, Gesa A, Zadereev, Egor S, and Zhukova, Tatyana V

Abstract

Climate change and other anthropogenic stressors have led to long-term changes in the thermal structure, including surface temperatures, deepwater temperatures, and vertical thermal gradients, in many lakes around the world. Though many studies highlight warming of surface water temperatures in lakes worldwide, less is known about long-term trends in full vertical thermal structure and deepwater temperatures, which have been changing less consistently in both direction and magnitude. Here, we present a globally-expansive data set of summertime in-situ vertical temperature profiles from 153 lakes, with one time series beginning as early as 1894. We also compiled lake geographic, morphometric, and water quality variables that can influence vertical thermal structure through a variety of potential mechanisms in these lakes. These long-term time series of vertical temperature profiles and corresponding lake characteristics serve as valuable data to help understand changes and drivers of lake thermal structure in a time of rapid global and ecological change.

Published
2021

7. Causal networks of phytoplankton diversity and biomass are modulated by environmental context

Author

Chang, Chun-Wei, Miki, Takeshi, Ye, Hao, Souissi, Sami, Adrian, Rita, Anneville, Orlane, Agasild, Helen, Ban, Syuhei, Be’eri-Shlevin, Yaron, Chiang, Yin-Ru, Feuchtmayr, Heidrun, Gal, Gideon, Ichise, Satoshi, Kagami, Maiko, Kumagai, Michio, Liu, Xin, Matsuzaki, Shin-Ichiro S., Manca, Marina M., Nõges, Peeter, Piscia, Roberta, Rogora, Michela, Shiah, Fuh-Kwo, Thackeray, Stephen J., Widdicombe, Claire E., Wu, Jiunn-Tzong, Zohary, Tamar, and Hsieh, Chih-hao

Published
2022
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8. Author Correction: Causal networks of phytoplankton diversity and biomass are modulated by environmental context

Author

Chang, Chun-Wei, Miki, Takeshi, Ye, Hao, Souissi, Sami, Adrian, Rita, Anneville, Orlane, Agasild, Helen, Ban, Syuhei, Be’eri-Shlevin, Yaron, Chiang, Yin-Ru, Feuchtmayr, Heidrun, Gal, Gideon, Ichise, Satoshi, Kagami, Maiko, Kumagai, Michio, Liu, Xin, Matsuzaki, Shin-Ichiro S., Manca, Marina M., Nõges, Peeter, Piscia, Roberta, Rogora, Michela, Shiah, Fuh-Kwo, Thackeray, Stephen J., Widdicombe, Claire E., Wu, Jiunn-Tzong, Zohary, Tamar, and Hsieh, Chih-hao

Published
2022
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12. Climate change drives widespread shifts in lake thermal habitat

Author

Kraemer, Benjamin M., Pilla, Rachel M., Woolway, R. Iestyn, Anneville, Orlane, Ban, Syuhei, Colom-Montero, William, Devlin, Shawn P., Dokulil, Martin T., Gaiser, Evelyn E., Hambright, K. David, Hessen, Dag O., Higgins, Scott N., Jöhnk, Klaus D., Keller, Wendel, Knoll, Lesley B., Leavitt, Peter R., Lepori, Fabio, Luger, Martin S., Maberly, Stephen C., Müller-Navarra, Dörthe C., Paterson, Andrew M., Pierson, Donald C., Richardson, David C., Rogora, Michela, Rusak, James A., Sadro, Steven, Salmaso, Nico, Schmid, Martin, Silow, Eugene A., Sommaruga, Ruben, Stelzer, Julio A. A., Straile, Dietmar, Thiery, Wim, Timofeyev, Maxim A., Verburg, Piet, Weyhenmeyer, Gesa A., and Adrian, Rita

Published
2021
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21. Using oxygen isotopes in phosphate to assess biological phosphorus cycling in a small and shallow freshwater lake system.

Author

Yi, Rong, Ishida, Takuya, Song, Peixue, Ikeya, Tohru, Okuda, Noboru, Paytan, Adina, and Ban, Syuhei

Subjects
PHOSPHORUS cycle (Biogeochemistry), LAKES, OXYGEN isotopes, BIOLOGICAL rhythms, AGRICULTURAL pollution, WATER quality, PHOSPHATES
Abstract

Reducing excess phosphorus (P) loads that cause eutrophication in aquatic systems is essential for meeting water quality standards. The oxygen isotopic composition of phosphate (δ18Op) is a powerful tool for tracking P sources and cycling in diverse natural ecosystems. Here, we use δ18Op distribution in a small freshwater body (a lagoon–lake system) with high biological activity. We report δ18Op values seasonally along the water flow path in lagoon–lake system adjacent to Lake Biwa, Japan. The δ18Op values of inflowing water originating as agricultural runoff were constant throughout the study period at +16.3‰ ± 0.2‰. The δ18Op values in the system were generally offset from temperature‐dependent isotopic equilibrium with the surrounding water, ranging from +11.1‰ to +17.8‰. The δ18Op values of the lake water approached equilibrium values in July and October, when dissolved inorganic P (DIP) retention rates were high, consistent with extensive biologically mediated phosphate cycling. A δ18Op two end‐member mixing model, involving inflowing P and biologically recycled P, suggests that P turnover rates in the lagoon–lake system were high during the productive seasons. In contrast, the longer lake water residence time in the non‐irrigation season (winter) allowed δ18Op values to deviate toward lower values relative to both equilibrium and agricultural source δ18Op values, suggesting that P metabolism was dominated by extracellular/ecto‐enzymatic hydrolysis of dissolved organic P under low DIP concentrations. This work highlighted the utility of δ18Op for understanding P dynamics in shallow lake ecosystems. [ABSTRACT FROM AUTHOR]

Published
2024
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37. Climate change drives widespread shifts in lake thermal habitat

Author

Kraemer, Benjamin M., Pilla, Rachel M., Woolway, R. Iestyn, Anneville, Orlane, Ban, Syuhei, Colom-Montero, William, Devlin, Shawn P., Dokulil, Martin T., Gaiser, Evelyn E., Hambright, K. David, Hessen, Dag O., Higgins, Scott N., Jöhnk, Klaus D., Keller, Wendel, Knoll, Lesley B., Leavitt, Peter R., Lepori, Fabio, Luger, Martin S., Maberly, Stephen C., Müller-Navarra, Dörthe C., Paterson, Andrew M., Pierson, Donald C., Richardson, David C., Rogora, Michela, Rusak, James A., Sadro, Steven, Salmaso, Nico, Schmid, Martin, Silow, Eugene A., Sommaruga, Ruben, Stelzer, Julio A. A., Straile, Dietmar, Thiery, Wim, Timofeyev, Maxim A., Verburg, Piet, Weyhenmeyer, Gesa A., and Adrian, Rita

Abstract

Lake surfaces are warming worldwide, raising concerns about lake organism responses to thermal habitat changes. Species may cope with temperature increases by shifting their seasonality or their depth to track suitable thermal habitats, but these responses may be constrained by ecological interactions, life histories or limiting resources. Here we use 32 million temperature measurements from 139 lakes to quantify thermal habitat change (percentage of non-overlap) and assess how this change is exacerbated by potential habitat constraints. Long-term temperature change resulted in an average 6.2% non-overlap between thermal habitats in baseline (1978–1995) and recent (1996–2013) time periods, with non-overlap increasing to 19.4% on average when habitats were restricted by season and depth. Tropical lakes exhibited substantially higher thermal non-overlap compared with lakes at other latitudes. Lakes with high thermal habitat change coincided with those having numerous endemic species, suggesting that conservation actions should consider thermal habitat change to preserve lake biodiversity.

Published
2024
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41. Density-mediated metabolic rate in Daphnia magnainteracting with temperature

Author

Gao, Huanan, Liu, Xin, and Ban, Syuhei

Abstract

ABSTRACTZooplankton change metabolic function as a physiological response to crowding. Unclear is whether zooplankton physiological responses also change according to species and measurement conditions, and whether the physiological responses to crowding are also changed by temperature. Further investigation is essential to unravel the intricate interplay between crowding-induced stress, energy allocation strategies, and behavioral adaptations. In this study, we determined the metabolic rates of cladoceran Daphnia magnaat 3 different densities (1, 10, and 20 individuals [ind.] per 50 mL) at 2 temperatures (10 and 20 °C) using a highly accurate optical oxygen meter. We aimed to clarify how crowding and temperature together affect metabolic rate. At both temperatures, metabolic rates of D. magnain the 2 crowded treatments were significantly lower than those in a single treatment, and as temperature decreased the rate of metabolic decrease slowed. Q10values varied from 1.63 for the 20 ind. per 50 mL treatment to 2.29 for the 1 ind. per 50 mL treatment, suggesting that the slowing of metabolic rates due to crowding is slightly less pronounced at lower temperatures and may be linked to reduced food consumption.

Published
2023
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44. A new method for phosphate purification for oxygen isotope ratio analysis in freshwater and soil extracts using solid‐phase extraction with zirconium‐loaded resin

Author

Ishida, Takuya, primary, Kamiya, Hiroshi, additional, Uehara, Yoshitoshi, additional, Kato, Toshikuni, additional, Sugahara, Shogo, additional, Onodera, Shin‐ichi, additional, Ban, Syuhei, additional, Paytan, Adina, additional, Tayasu, Ichiro, additional, and Okuda, Noboru, additional

Published
2022
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