INPA | Tree species composition of natural forest islands in a savanna matrix in the northern Brazilian Amazonia

Margarita Maria Almanza Jaramillo; Maryory Medina Turcios; Ricardo Oliveira Perdiz; Lidiany Camila Silva Carvalho; Reinaldo Imbrozio Barbosa

doi:10.15468/n8yolk

INPA | Tree species composition of natural forest islands in a savanna matrix in the northern Brazilian Amazonia

Citation

Jaramillo M M A, Turcios M M, Perdiz R O, Carvalho L C S, Barbosa R I (2025). INPA | Tree species composition of natural forest islands in a savanna matrix in the northern Brazilian Amazonia. Version 1.13. Sistema de Informação sobre a Biodiversidade Brasileira - SiBBr. Occurrence dataset https://doi.org/10.15468/n8yolk accessed via GBIF.org on 2025-05-24.

Description

A forest inventory was carried out in 12 forest islands scattered in the large savanna matrix of Roraima, northern Brazilian Amazon. The fieldwork occurred between 2013-2014 based on direct observations along transects established between the edge-interior gradient of each sampled forest island. It was investigated species composition and forest structure variables: stem diameter (DBH euqal diameter at breast height greater than or equal to10 cm) and total height (visually estimated). All floristic dataset was correlated with the forest fragment size. The survey was conducted by the Research Group "Ecology and Natural Resource Management of Roraima Savanna", associated to the National Institute for Research in Amazonia (INPA).

Sampling Description

Study Extent

The study was carried out in 12 forest fragments distributed in the Roraima’s savanna region, located in the municipality of Boa Vista (state of Roraima), northern Brazilian Amazonia, in a locality currently known as “Projeto de Assentamento Nova Amazônia I” (PANA I): 2.8864 N to 3.1526 N / -60.7638 W at -60.9865 W. The phytophysionomic formation of the region is typically savanna, ranging from grassy to parkland, with several forest fragments scattered in the general landscape. The temporal coverage of the study was 07/2013 to 03/2014.

Sampling

The natural forest fragments (forest islands) inventoried are Pleistocene relics that represent the richness and tree species composition of the past forest formations occurring in the forest-savanna contact zone of the northern Brazilian Amazonia. The forest inventory was articulated through the establishment of three transects crossing each island in the north-south direction. In each transect, sampling plots (10 m x 30 m) were dispersed between the border and the interior of the fragments: 8-10 plots for fragments with area greater than 30 ha, 4-8 for islands between 10-30 ha, and 2-6 for islands less than 10 ha. This sampling design was the most adequate to represent the forest fragments, avoiding pseudo replication and maintaining a minimum distance (independence) between transects and plots. Forest inventory was performed based on measurements of stem DBH (cm) and individual total height (m); the last one by visual estimates. Vegetative and reproductive material were collected, as well as a general description of each species was done. Photographs of all collected morphotypes were done too.

Quality Control

All the individuals observed were measured. Most species were collected and registered by a numbered tag in the fieldwork. All of them were identified botanically to deposit in herbariums. Thirty-six vouchers representing most of the inventoried species were deposited in the UFRR Herbarium.

Method steps

The species identification was done by R. O. Perdiz using both (i) specific literature and (ii) comparison with herbarium specimens from INPA, K, MIRR, P, RB, SPF, UFRR, and US, including the digital resources of Projeto REFLORA (Plantas do Brasil: Resgate Histórico e Herbário Virtual para o Conhecimento e Conservação da Flora Brasileira - http://reflora.jbrj.gov.br/reflora/herbarioVirtual/). Herbaria acronyms follow Thiers (2019).
Scientific names of the species list were checked against database provided by BFG (2015) and Tropicos (http://www.tropicos.org/). The circumscriptions for the botanical families followed APG IV (2016).

Additional info

This dataset is associated to the Master Thesis of Margarita Maria Almanza Jaramillo (Estrutura, biomassa arbórea e composição florística de ilhas de mata da savana de Roraima, Norte da Amazônia Brasileira), concluded in August/2015 in the PRONAT/UFRR, Boa Vista, Roraima - http://bdtd.ibict.br/vufind/Record/UFRR_7f0b9955cdd438aabdb34036bc47394c

Taxonomic Coverages

Geographic Coverages

The study was carried out on 12 natural forest fragments (forest islands) dispersed in a Roraima’s savanna area, located in the municipality of Boa Vista, state of Roraima, northern Brazilian Amazonia. This area is legally characterized as an INCRA agricultural colonization project - currently named as “Projeto de Assentamento Nova Amazônia I” (or PANA I). The PANA I cover an area greater than 43,000 ha in extension in the confluence zone between Rio Cauamé and Rio Murupu, both integrating the Rio Branco basin.

Bibliographic Citations

APG-IV, 2016. An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV. Botanical Journal of the Linnean Society 181, 1-20. - http://dx.doi.org/10.1111/boj.12385
Thiers, B. 2019. Index Herbariorum. A global directory of public herbaria and associated staff. New York Botanical Garden's Virtual Herbarium. -
BFG (Brazil Flora Group). 2015. Growing knowledge: an overview of Seed Plant diversity in Brazil. Rodriguésia 66, 1085-1113. - http://dx.doi.org/10.1590/2175-7860201566411.

Contacts

Margarita Maria Almanza Jaramillo
originator
position: MSc
UFRR
Campus do Paricarana
Boa Vista
69319-000
Roraima
BR
Telephone: +559536239433
email: nanaalmansa@gmail.com
userId: http://lattes.cnpq.br/3208357702390498

Maryory Medina Turcios
originator
position: MSc
UFRR
Campus do Paricarana
Boa Vista
69319-000
Roraima
BR
Telephone: +559536239433
email: mmedinaturcios@gmail.com
userId: http://lattes.cnpq.br/6157423087615667

Ricardo Oliveira Perdiz
originator
position: Dr.
INPA
Rua Coronel Pinto 315 - Centro
Boa Vista
69301-150
Roraima
BR
Telephone: +559536239433
email: ricoperdiz@gmail
userId: http://lattes.cnpq.br/2115845365136873

Lidiany Camila Silva Carvalho
originator
position: Dr.
University of Exeter
Exeter
69319-000
GB
Telephone: +559536239433
email: lidycamila.carvalho@gmail.com
userId: http://lattes.cnpq.br/1180781196164074

Reinaldo Imbrozio Barbosa
originator
position: Dr.
INPA
Rua Coronel Pinto 315 - Centro
Boa Vista
69301-150
Roraima
BR
Telephone: +559536239433
email: reinaldo@inpa.gov.br
userId: http://orcid.org/0000-0002-7482-346X

Reinaldo Imbrozio Barbosa
metadata author
position: Dr.
INPA
Rua Coronel Pinto 315 - Centro
Boa Vista
69301-150
Roraima
BR
Telephone: +559536239433
email: reinaldo@inpa.gov.br
userId: http://orcid.org/0000-0002-7482-346X

Margarita Maria Almanza Jaramillo
administrative point of contact
position: MSc
UFRR
Campus do Paricarana
Boa Vista
69319-000
Roraima
BR
Telephone: +559536239433
email: nanaalmansa@gmail.com
userId: http://lattes.cnpq.br/3208357702390498

Maryory Medina Turcios
administrative point of contact
position: MSc
UFRR
Campus do Paricarana
Boa Vista
69319-000
Roraima
BR
Telephone: +559536239433
email: mmedinaturcios@gmail.com
userId: http://lattes.cnpq.br/6157423087615667

Ricardo Oliveira Perdiz
administrative point of contact
position: Dr.
INPA
Rua Coronel Pinto 315 - Centro
Boa Vista
69301-150
Roraima
BR
Telephone: +559536239433
email: ricoperdiz@gmail.com
userId: http://lattes.cnpq.br/2115845365136873

Lidiany Camila Silva Carvalho
administrative point of contact
position: Dr.
University of Exeter
Exeter
GB
email: lidycamila.carvalho@gmail.com
userId: http://lattes.cnpq.br/1180781196164074

Reinaldo Imbrozio Barbosa
administrative point of contact
position: Dr.
INPA
Rua Coronel Pinto 315 - Centro
Boa Vista
69301-150
Roraima
BR
Telephone: +559536239433
email: reinaldo@inpa.gov.br
userId: http://lattes.cnpq.br/2040628785093158