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Impacts of rice–crayfish co-culture on ecosystem service trade-offs/synergies in agricultural watersheds: A case exploration in Sihu Lake Basin, China

Author

Listed:
  • Zhang, Huanyu
  • Wang, Ling
  • Jiang, Shuqi
  • Li, Kun
  • Xin, Xiaoping
  • Huang, Xin
  • Chen, Junchen
  • Zhou, Luyao
  • Li, Zhaohua

Abstract

Accurately understanding the interplay among ecosystem services (ESs) during rice to rice–crayfish conversion and analyzing the intricate driving factors are crucial for the synergistic development of agricultural production and ecosystem service protection in watersheds. In this study, we examined the ES trade-offs/synergies and the drivers behind these interactions in rice to rice–crayfish conversion in the Sihu Lake Basin using the InVEST model, geographically weighted regression (GWR), and Geodetector. The results indicated that the rice to rice–crayfish conversion from 2016 to 2020 increased the rice–crayfish fields in the Sihu Lake Basin by 60 %, with the additional rice–crayfish fields coming mainly from paddy fields and aquaculture water. Significant increases were observed in crayfish production (CP, 74.2 %), grain production (GP, 20 %), water yield (WY, 19.6 %), and carbon sequestration (CS, 1 %). In contrast, water purification (WP) and habitat quality (HQ) showed slight decreases of 0.85 % and 1.45 %, respectively. There was an overall synergy between CP, GP, HQ, and CS, with the area exhibiting synergy between CP and GP accounting for approximately 89 % of the watershed area. Natural factors had a greater influence on the interactions between CP and other ecosystem services than socio-economic factors. Additionally, the rice–crayfish field area has gradually become a key driver affecting the interactions between ESs. These findings offer guidance to mitigate the negative ecological impacts of rice to rice–crayfish conversion in the Sihu Lake Basin and support rational agricultural structure transformation.

Suggested Citation

  • Zhang, Huanyu & Wang, Ling & Jiang, Shuqi & Li, Kun & Xin, Xiaoping & Huang, Xin & Chen, Junchen & Zhou, Luyao & Li, Zhaohua, 2025. "Impacts of rice–crayfish co-culture on ecosystem service trade-offs/synergies in agricultural watersheds: A case exploration in Sihu Lake Basin, China," Agricultural Water Management, Elsevier, vol. 310(C).
    • Handle: RePEc:eee:agiwat:v:310:y:2025:i:c:s0378377425001039
    DOI: 10.1016/j.agwat.2025.109389
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