Banca de QUALIFICAÇÃO: KELLY YUMI INAGAKI

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : KELLY YUMI INAGAKI
DATA : 10/10/2019
HORA: 09:30
LOCAL: Sala de Reuniões DECOL
TÍTULO:

Beyond range shifts: ecological interactions in face of climate change

 

PALAVRAS-CHAVES:

Feeding pressure;Bayesian models;Future projections;Western Atlantic;latitudinal patterns

PÁGINAS: 20
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
RESUMO:

Tropical ecosystems harbor higher biodiversity, more intense, and more diverse ecological interactions than extratropical ecosystems. These latitudinal patterns result from long-term evolutionary processes, but tropical species are expanding their range poleward due to climate change, which may affect biodiversity and interaction patterns. Tropicalization events are frequently characterized by changes in species occurrence, but ecological interactions received less attention despite their importance for the ecosystems. Because changes in temperatures can affect the physiology of organisms, particularly ecthoterms, we hypothesize that increasing temperatures predicted for near future will intensify trophic interactions up to the physiological limits when interactions would be no longer viable. Additionally, warming of extratropical zones may intensify interactions as well as enable tropical species to establish new interactions in these areas. Therefore, based on reef fish occurrence, biomass and feeding pressure, we evaluated how trophic interactions of herbivorous, invertivorous, and omnivorous fishes will respond to increasing temperatures across 61° of latitude in the Western Atlantic, using Bayesian models to predict the intensity of interactions in 2050 and 2100 based on the IPCC Scenarios. Trophic interactions will reduce by 20 to 40% in the tropics, likely indicating that increased temperatures will exceed the physiological tolerance of fishes. This may have profound effects for ecosystem functioning such as reinforcing the ongoing phase shift from coral to algal-dominated reefs in the Caribbean. Contrary, in the northern extratropical region (26-34°N) trophic interactions will increase following the arrival of tropical herbivores, while interactions of omnivorous fishes will decrease in these areas. Extratropical reefs in the southern hemisphere are less prone to changes, likely because of a cold water current that comes from the pole up to 22°S of latitude. Interactions by invertivores will decline in 50% along the entire Western Atlantic, which may have critical ecological implications. Predicting how climate change will affect trophic interactions and consequently ecosystem function will aid planning and adaptation to retain important ecosystem services in these novel ecosystems.

 

MEMBROS DA BANCA:
Presidente - 2319234 - GUILHERME ORTIGARA LONGO
Externo à Instituição - MARIANA BENDER GOMES - UFSM
Externa ao Programa - 089.539.404-94 - NATÁLIA CARVALHO ROOS - UFRN