Banca de QUALIFICAÇÃO: KAIO HENRIQUE FARIAS DA SILVA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE: KAIO HENRIQUE FARIAS DA SILVA
DATA : 27/02/2025
LOCAL: Remoto (online)
TÍTULO:

COPEPODS IN THE SOUTHWESTERN TROPICAL ATLANTIC (SÃO PEDRO AND SÃO PAULO ARCHIPELAGO, BRAZIL) UNDER WEATHER PATTERNS INFLUENCES

PALAVRAS-CHAVES:

Copepoda, oligotrophic, plankton,  climate change, São Pedro and São Paulo Archipelago, Biomass, Productivity

PÁGINAS: 30
RESUMO:

The Saint Peter and Saint Paul Archipelago is located at 1°N of the Equator in the Atlantic Ocean. This study investigated the ecological descriptors of the copepod community, aiming to generate baseline data for the long-term monitoring of pelagic ecosystems in the Tropical Atlantic, particularly in the context of climate change. Plankton samples were collected through vertical hauls (0–60 m) with a 200 µm mesh size net along two transects (east and west of the ASPSP) during two sampling periods. Comparisons were made between two timeframes: 2010–2011 and 2023–2024. The year 2010 was marked by the El Niño phenomenon, whereas 2023 was influenced by La Niña. However, patterns opposite to expectations were observed, with 2023 recording unprecedented temperature peaks in the region. The community was composed of eight abundant copepod species, with Clausocalanus furcatus dominating across all periods, leading to a decline in diversity. Biomass and productivity followed patterns typical of regions associated with seamounts, with the highest contributions from Undinula vulgaris, Euchaeta marina, and C. furcatus. Despite the lower abundances of U. vulgaris and E. marina compared to C. furcatus, their larger body sizes significantly contributed to energy transfer in the SPSPA. Negative correlations were observed between the abundance of Oithona plumifera and temperature, with its abundance decreasing at temperatures exceeding 28.5°C. This finding is noteworthy, as this species is recognized as a bioindicator of warm waters. Our results highlight the need for long-term monitoring of marine protected areas in response to climate change and suggest the potential use of O. plumifera as a bioindicator of climate change.

MEMBROS DA BANCA:
Externo à Instituição - ÉRICA CAROLINE BECKER - UFSC
Interno - ***.246.595-** - GABRIEL BITTENCOURT FARIAS - UFPE
Presidente - 2309616 - RALF SCHWAMBORN