PELD - ILOC | ReefSYN - Standardized datasets of Brazilian reef diversity in space and time - Dataset X: Alcatrazes monitoring
PELD - ILOC | Monitoramento de Longa Duração das Comunidades Recifais das Ilhas Oceânicas Brasileiras
Universidade Federal Fluminense
Description
This dataset is part of a broader compilation named 'Standardized datasets of Brazilian reef diversity in space and time' created from a research network of reef scientists within several projects and collaborations and finally gathered and published by the ReefSYN group.
This dataset has been collected through the collective effort among Instituto Chico Mendes de Conservação da Biodiversidade (ICMBio), Centro de Biologia Marinha - Universidade de São Paulo (CEBIMar/USP), LECAR http://www.lecaruff.com.br) and LBMM https://lbmm.ufsc.br) teams.
Geographic Description
The study was conducted in the Alcatrazes Archipelago, located in Southeastern Brazil, 36 km from the mainland (Fig. 2), within a wide transition zone under the influence of the Brazilian Current (warm with low concentrations of nutrients), the Falklands Current, and the South Atlantic Central Water (cold and nutrient-rich) (Ciotti et al. 2018). This archipelago is formed by the main island and 13 other rocky outcrops, and included within two no-take areas: the Refúgio da Vida Silvestre do Arquipélago de Alcatrazes, which covers a no-take area of 24.63 km2 (Motta et al. 2021) (Brazil 2016), and the Estação Ecológica Tupinambás (Brazil 1987), restricted to reef habitats that presently sustain one of the largest concentrations of shallow-water reef fish biomass along the Brazilian Province (Morais et al. 2017).
Data quality
The name of all taxa was checked against the WoRMS database (World Register of Marine Species (WoRMS, 2022)), using the R package “worrms” (Chamberlain 2020). Thus, valid scientific names were called “scientificNameAccepted” following the DCS standard. The last checking was done on 23 October 2023, using the version 0.4.2 of ‘worrms’ R package., with some taxonomic updates were made by hand.
Methods
For fish sampling, 15 underwater visual censuses (UVCs) were conducted for each combination of factors (i.e., both years, in the three sites, and in the two depth strata - below and above the thermocline; Table S1). These censuses were conducted along 40 m2 (20 x 2 m) random belt transects (Floeter et al. 2007). From the reef bottom to 2 m up in the water column, fish were identified, counted and their size (total body length in cm) was estimated. Floeter SR, Krohling W, Gasparini JL, Ferreira CEL, Zalmon IR (2007) Reef fish community structure on coastal islands of the southeastern Brazil: The influence of exposure and benthic cover. Environ Biol Fishes 78:147–160.. Transects were surveyed twice. Large and medium individuals with high mobility were recorded first, and bottom-dwelling small (< 10 cm) cryptobenthic and territorial individuals with low mobility were counted while swimming on the way back. Fish were pooled in size and trophic groups based on body size and diet categories. Size categories followed modal components of the whole fish sample: smaller than 15 cm, from 15 to 23 cm, from 24 to 35 cm, and larger than 35 cm.
Citation
Mendes T C, Quimbayo J P, Morais R, Batista A, Barbosa M C, Giglio V J, Cordeiro C A M M, Luza A L (2024). ReefSYN | Standardized datasets of Brazilian reef diversity in space and time - Dataset X: Alcatrazes monitoring. Version 2.0. Tropical and Subtropical Western South Atlantic OBIS. Samplingevent dataset. https://doi.org/10.25607/4e5fuo
Rights
This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC 4.0) License.
Usage statistics
Loading...
Digitised records
Looking up... the number of records that can be accessed through the SiBBr. This resource was last checked for updated data on 02 Jul 2024. The most recent data was published on 02 Jul 2024.
Click to view records for the PELD - ILOC | ReefSYN - Standardized datasets of Brazilian reef diversity in space and time - Dataset X: Alcatrazes monitoring resource.Metadata last updated on 2024-07-02 01:21:18.0
![](https://collectory.sibbr.gov.br/collectory/data/dataProvider/peld iloc logo.jpg)