Journal ArticleDOI
Bottom-up linkages between primary production, zooplankton, and fish in a shallow, hypereutrophic lake
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Top-up linkages between nutrient, primary production, and zooplankton abundance might be a key mechanism supporting high planktivore abundance in eutrophic lakes, and this study highlights the need for ecosystem management to resolve the conflict between good water quality and high fishery production.Abstract:
Nutrient supply is a key bottom-up control of phytoplankton primary production in lake ecosystems. Top-down control via grazing pressure by zooplankton also constrains primary production and primary production may simultaneously affect zooplankton. Few studies have addressed these bidirectional interactions. We used convergent cross-mapping (CCM), a numerical test of causal associations, to quantify the presence and direction of the causal relationships among environmental variables (light availability, surface water temperature, NO3 -N, and PO4 -P), phytoplankton community composition, primary production, and the abundances of five functional zooplankton groups (large cladocerans, small cladocerans, rotifers, calanoids, and cyclopoids) in Lake Kasumigaura, a shallow, hypereutrophic lake in Japan. CCM suggested that primary production was causally influenced by NO3 -N and phytoplankton community composition; there was no detectable evidence of a causal effect of zooplankton on primary production. Our results also suggest that rotifers and cyclopoids were forced by primary production, and cyclopoids were further influenced by rotifers. However, our CCM suggested that primary production was weakly influenced by rotifers (i.e., bidirectional interaction). These findings may suggest complex linkages between nutrients, primary production, and rotifers and cyclopoids, a pattern that has not been previously detected or has been neglected. We used linear regression analysis to examine the relationships between the zooplankton community and pond smelt (Hypomesus nipponensis), the most abundant planktivore and the most important commercial fish species in Lake Kasumigaura. The relative abundance of pond smelt was significantly and positively correlated with the abundances of rotifers and cyclopoids, which were causally influenced by primary production. This finding suggests that bottom-up linkages between nutrient, primary production, and zooplankton abundance might be a key mechanism supporting high planktivore abundance in eutrophic lakes. Because increases in primary production and cyanobacteria blooms are likely to occur simultaneously in hypereutrophic lakes, our study highlights the need for ecosystem management to resolve the conflict between good water quality and high fishery production.read more
Citations
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Journal ArticleDOI
Trophic control changes with season and nutrient loading in lakes.
Tanya L. Rogers,Stephan B. Munch,Simon D. Stewart,Eric P. Palkovacs,Alfredo Giron-Nava,Shin-ichiro S. Matsuzaki,Celia C. Symons,Celia C. Symons +7 more
TL;DR: Across all lakes, top‐down effects were associated with nutrients, switching from negative in mesotrophic Lakes to positive in oligotrophic lakes, and this result suggests that zooplankton nutrient recycling exceeds grazing pressure in nutrient‐limited systems.
Journal ArticleDOI
The paradox of re-oligotrophication: the role of bottom-up versus top-down controls on the phytoplankton community
Orlane Anneville,Chun-Wei Chang,Gaël Dur,Gaël Dur,Sami Souissi,Frédéric Rimet,Chih-hao Hsieh,Chih-hao Hsieh +7 more
Journal ArticleDOI
Nitrogen budgets in Japan from 2000 to 2015: Decreasing trend of nitrogen loss to the environment and the challenge to further reduce nitrogen waste.
Kentaro Hayashi,Hideaki Shibata,Azusa Oita,Kazuya Nishina,Akihiko Ito,Kiwamu Katagiri,Junko Shindo,Wilfried Winiwarter,Wilfried Winiwarter +8 more
TL;DR: The aging of Japan's population coincided with the reductions in the per capita supply and consumption of food and energy, and future challenges for Japan lie in further reducing N waste and adapting its N flows in international trade to adopt more sustainable options considering the reduced demand due to the aging population.
Journal ArticleDOI
Long-term warming destabilizes aquatic ecosystems through weakening biodiversity-mediated causal networks
Chun-Wei Chang,Hao Ye,Hao Ye,Takeshi Miki,Takeshi Miki,Takeshi Miki,Ethan R. Deyle,Sami Souissi,Orlane Anneville,Rita Adrian,Rita Adrian,Yin-Ru Chiang,Satoshi Ichise,Michio Kumagai,Shin-ichiro S. Matsuzaki,Fuh-Kwo Shiah,Fuh-Kwo Shiah,Jiunn-Tzong Wu,Jiunn-Tzong Wu,Chih-hao Hsieh,George Sugihara +20 more
TL;DR: The integrated causal pathway in the ecosystem network, composed of the interactions among species richness, nutrient cycling, and phytoplankton biomass, was the best predictor of stability and systems that experienced stronger warming over time had both weakened causal interactions and larger fluctuations.
Journal ArticleDOI
Patterns of CO2 concentration and inorganic carbon limitation of phytoplankton biomass in agriculturally eutrophic lakes.
Horacio E. Zagarese,María de los Ángeles González Sagrario,Dieter Wolf-Gladrow,Peeter Nõges,Tiina Nõges,Külli Kangur,Shin-ichiro S. Matsuzaki,Ayato Kohzu,Michael J. Vanni,Deniz Özkundakci,Santiago Andrés Echaniz,Alicia Vignatti,Fabián Grosman,Pablo Sanzano,Bryce Van Dam,Lesley B. Knoll +15 more
TL;DR: For the first time, whole-lake evidence of carbon limitation of phytoplankton biomass is provided, and conditions of CO2 undersaturation develop much more frequently in these agriculturally impacted lakes than in deep, temperate lakes in forested watersheds.
References
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Journal Article
R: A language and environment for statistical computing.
TL;DR: Copyright (©) 1999–2012 R Foundation for Statistical Computing; permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and permission notice are preserved on all copies.
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Biodiversity loss and its impact on humanity
Bradley J. Cardinale,J. Emmett Duffy,Andrew Gonzalez,David U. Hooper,Charles Perrings,Patrick Venail,Anita Narwani,Georgina M. Mace,David Tilman,David A. Wardle,Ann P. Kinzig,Gretchen C. Daily,Michel Loreau,James B. Grace,Anne Larigauderie,Diane S. Srivastava,Shahid Naeem +16 more
TL;DR: It is argued that human actions are dismantling the Earth’s ecosystems, eliminating genes, species and biological traits at an alarming rate, and the question of how such loss of biological diversity will alter the functioning of ecosystems and their ability to provide society with the goods and services needed to prosper is asked.
Journal ArticleDOI
Detecting Causality in Complex Ecosystems
George Sugihara,Robert M. May,Hao Ye,Chih-hao Hsieh,Ethan R. Deyle,Michael J. Fogarty,Stephan B. Munch +6 more
TL;DR: A new method, based on nonlinear state space reconstruction, that can distinguish causality from correlation is introduced, and extends to nonseparable weakly connected dynamic systems (cases not covered by the current Granger causality paradigm).
Journal ArticleDOI
Trophic cascades revealed in diverse ecosystems.
TL;DR: Analyses of the extirpation of large animals reveal loss of cascades, and the potential of conservation to restore not only predator populations but also the ecosystem-level effects that ramify from their presence is revealed.