Arreguín Sánchez, F. (2022). Ecosystem resilience. Springer Cham (Ed.), Holistic Approach to Ecosystem-Based Fisheries Management. Linking Biological Hierarchyes for Sustainable Fishing. Cap. 6, pp.73-86. DOI: 10.1007/978-3-030-96847-2_6.
Francisco Arreguín Sánchez 1
In this chapter, the concept of ecosystem resilience is reviewed. The concept of panarchy is approached since it allows us to understand the complex nature of the interdependencies of the different natural and socioeconomic hierarchies or systems that comprise the fishing sector. The dynamics of each hierarchy is synthesized by Holling (Sustainable development of the biosphere, Cambridge University Press, 1986; Ecosystems 4(5), 390–405, 2001) in the concept of the adaptive cycle, which describes the performance of the system in four stages of continuous evolution: growth, conservation, collapse, and reorganization; each of them characterized by changes in resilience, a key process of said dynamics and performance. In particular, in the representative trophic networks of ecosystems, each flow path is characterized by two components: conditioned energy, responsible for the organization of the ecosystem; and the network entropy, which represents the resilience of the system. Under the ecosystem dynamics theory of Ulanowicz (Growth and development: Ecosystems phenomenology. Springer, 1986), the overhead, and specifically the flows component, is an indicator of the resilience in the trophic web. Such resilience is described, especially relating to the loss of biomass, and a threshold is identified. Two examples are presented; one of them, for the southern Gulf of Mexico, related to the trend of changes in resilience as a consequence of changes in the organization and functioning of the ecosystem due to climate change; and the second, for the central region of the Gulf of California where the threshold of resilience caused by the loss of biomass of the species in the ecosystem is estimated. Regarding practical utility, these thresholds are represented in terms of the limit harvest rates for each species, relevant information that, translated into fishing mortality or biomass retained by fishing, is essential for the fisheries management; in this case, by their nature, as criteria of precautionary nature.
Palabras clave: ecosystem resilience; Panarchy; Socio-ecological system; adaptive cycle; Resilience threshold; Campeche Bank; Central Gulf of California; Supply-demand of energy; Catch/biomass ratio; Network entropy
Para obtener una copia del documento contacta la personal de la biblioteca a través del correo bibliocicimar{a}ipn.mx