Soriano, Eliane MarinhoSilva, Marcelle Stephanne Barbosa da2020-02-172021-10-062020-02-172021-10-062019-11-28SILVA, Marcelle Stephanne Barbosa. Avaliação dos efeitos das mudanças climáticas sobre a macroalga Gracilaria birdiae – implicações para a aquicultura. 2019. 33 f. Monografia (Graduação em Ecologia) – Universidade Federal do Rio Grande do Norte, Natal, 2019.https://repositorio.ufrn.br/handle/123456789/43359At the moment, much has been asked how climate change will affect organisms and ecosystems, especially in coastal marine environments. Given this perspective, it is uncertain how these climate changes will impact sectors of the economythat are based on marine organisms such as aquaculture. Concerning this scenario, this study aimed to evaluate the physiological response of the agarophyte Gracilaria birdiae, a native species with the highest cultivation potential in Brazil, regarding alteration in temperature and salinity caused by climate change. The seaweed studied was collected at Cotovelo beach, Parnamirim, RN. The treatments chosen to comprise this study were developed based on the RCP 2.6 and RCP 4.5 scenarios, predicted by IPCC 2014 (Intergovernmental Panel on Climate Change). According to these scenarios, four treatments were tested: T1 (28 °C and 36 PSU); T2 (28 °C and 34 PSU); T3 (29 °C and 36 PSU) and T4 (29 °C and 34 PSU). All treatments were carried out with four replicates. The determination of biomass, RGR and in vivochlorophyll fluorescence was measured every 2 days during a 12-day period. In all treatments, G. birdiaeshowed positive values of biomass and RGR throughout the experiment. Both biomass and RGR exhibited higher values in the treatment with higher temperature and lower salinity (T4). When analyzing ETRmax, Ikand Yield, the seaweed showed better performance in treatments with lower salinity (T2 and T4). Among all the treatments tested, T3 was the scenario in which G. birdiaeexhibited the lowest values. Given these results, we can observe that G. birdiae, being considered an euryhaline andeurythermalspecies, which is present in an environment with great environmental stress, may not suffer negative influences due to the climate changes predicted for RCP 2.6 and 4.5 scenarios. Thus, this seaweed shows a great potential for cultivation with regards to the Earth’s climate situation.However, longer-term experiments as well as more critical temperature scenarios must be performed to confirm the results for this speciesAttribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/Aquecimento globalGlobal warmingTemperaturaTemperatureSalinidadeSalinityCultivo de macroalgaSeaweed farmingbachelorThesis