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Journal Articles Nature Communications Year : 2022

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

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

Abstract

Untangling causal links and feedbacks among biodiversity, ecosystem functioning, and environmental factors is challenging due to their complex and context-dependent interactions (e.g., a nutrient-dependent relationship between diversity and biomass). Consequently, studies that only consider separable, unidirectional effects can produce divergent conclusions and equivocal ecological implications. To address this complexity, we use empirical dynamic modeling to assemble causal networks for 19 natural aquatic ecosystems (N24~N58) and quantified strengths of feedbacks among phytoplankton diversity, phytoplankton biomass, and environmental factors. Through a cross-system comparison, we identify macroecological patterns; in more diverse, oligotrophic ecosystems, biodiversity effects are more important than environmental effects (nutrients and temperature) as drivers of biomass. Furthermore, feedback strengths vary with productivity. In warm, productive systems, strong nitrate-mediated feedbacks usually prevail, whereas there are strong, phosphate-mediated feedbacks in cold, less productive systems. Our findings, based on recovered feedbacks, highlight the importance of a network view in future ecosystem management.
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Dates and versions

insu-03664870 , version 1 (11-05-2022)

Licence

Attribution - CC BY 4.0

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Chun-Wei Chang, Takeshi Miki, Hao Ye, Sami Souissi, Rita Adrian, et al.. Causal networks of phytoplankton diversity and biomass are modulated by environmental context. Nature Communications, 2022, 13 (1), ⟨10.1038/s41467-022-28761-3⟩. ⟨insu-03664870⟩
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