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Tenho interesse em biologia, ecologia, diversidade, evolução e conservação de artrópodes com foco em aranhas. Graduado em Ciências Biológicas - Licenciatura pela Universidade do Vale do Rio dos Sinos (Unisinos - São Leopoldo, Rio Grande do Sul, Brasil). Mestre e Doutor pelo programa de Pós-graduação em Biologia Animal da UFRGS (Universidade Federal do Rio Grande do Sul). Atualmente trabalho como pesquisador na Universidade do Açores, sendo Pesquisador/Pós-Doc do projeto MACRISK (Trait-based prediction of extinction risk and invasiveness for Northern Macaronesian arthropods, FCT-PTDC/BIA-CBI/0625/2021). Grupo da Biodiversidade dos Açores, cE3c - Centre for Ecology, Evolution and Environmental Changes & CHANGE - Global Change and Sustainability Institute. - - I am interested in biology, ecology, diversity, evolution and conservation of arthropods with a focus on spiders. I am graduated in Biological Sciences through University of Vale do Rio dos Sinos (Unisinos - São Leopoldo, Rio Grande do Sul, Brazil). Master and PhD in Animal Biology through UFRGS (Federal University of Rio Grande do Sul). I am currently working as a researcher at the University of the Azores, at the MACRISK project (Trait-based prediction of the risk of extinction and invasiveness for arthropods from Northern Macaronesia, FCT-PTDC/BIA-CBI/0625/2021). The Azorean Biodiversity Group, cE3c - Center for Ecology, Evolution and Environmental Change & CHANGE - Institute for Global Change and Sustainability.
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Identification

Personal identification

Full name
Guilherme Oyarzabal da Silva

Citation names

  • Oyarzabal, Guilherme
  • Silva, Guilherme
  • Silva, Guilherme O

Author identifiers

Ciência ID
D716-C6FE-0012
ORCID iD
0000-0001-7332-9788

Knowledge fields

  • Natural sciences - Biological Sciences - Ecology

Languages

Language Speaking Reading Writing Listening Peer-review
Portuguese (Mother tongue)
English Advanced (C1) Advanced (C1) Advanced (C1) Advanced (C1) Advanced (C1)
Spanish; Castilian Elementary (A2) Elementary (A2) Elementary (A2) Elementary (A2) Elementary (A2)
Education
Degree Classification
2017/03/01 - 2022/01/30
Concluded
 Biologia Animal (Doctor)
Major in Arachnologia e Ecologia
Universidade Federal do Rio Grande do Sul, Brazil
"Aranhas sob impacto de pastejo: Uma abordagem em Multi-Escalas" (THESIS/DISSERTATION)
2015/03/01 - 2017/02/01
Concluded
 Biologia Animal (Master)
Major in Arachnologia e Ecologia
Universidade Federal do Rio Grande do Sul, Brazil
"Análise comparativa da fauna de aranhas em áreas de campo com e sem pastejo no Pampa Gaúcho" (THESIS/DISSERTATION)
Affiliation

Science

Category
Host institution 		Employer
2022/12/01 - 2025/06/01 Contracted Researcher (Research) Universidade de Lisboa Centro de Ecologia Evolução e Alterações Ambientais, Portugal
Universidade dos Açores - Campus de Angra do Heroísmo, Portugal
2022/01/31 - 2022/11/30 Postdoc (Research) University of Nebraska-Lincoln School of Biological Sciences, United States
2015/03/01 - 2022/01/31 Researcher (Research) Universidade Federal do Rio Grande do Sul, Brazil
2012/05/01 - 2017/02/01 Research Trainee (Research) Fundação Zoobotânica do Rio Grande do Sul, Brazil

Other Careers

Category
Host institution 		Employer
2020/01/01 - Current Professor do ensino básico e secundário (Professor do ensino básico e secundário) ONGEP - ONG de Educação Popular, Brazil
2022/10/01 - 2023/03/28 Professor do ensino básico e secundário (Professor do ensino básico e secundário) Aliança América - Escola de Inglês, Brazil
Projects

Grant

Designation Funders
2017 - 2022/01/31 Effects of grazing on orb-weaver spiders: A multi-scale approach using hierarchical models
88882.439370/2019-01
 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
2017 - 2022 Effects of grazing on orb-weaver spiders: A multi-scale approach using hierarchical models
88882.439370/2019-01
 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
2017 - 2022 Effects of grazing on orb-weaver spiders: A multi-scale approach using hierarchical models
88882.439370/2019-01
 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
2017 - 2022 Effects of grazing on orb-weaver spiders: A multi-scale approach using hierarchical models
88882.439370/2019-01
 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
2021/03/01 - 2021/12/15 Unraveling secrets: What do plants tell spiders about disturbances in grasslands?
Fulbright Brazil, DDRA
PhD Student Fellow
University of Nebraska-Lincoln, United States
Concluded
2018/02 - 2021/03 Orb-Weaver spiders under grazing impact: A multiscale aproach
1
 Neotropical Grassland Conservancy

Contract

Designation Funders
2022/12/01 - 2025/06/01 Trait-based prediction of extinction risk and invasiveness for Northern Macaronesian arthropods - MACRISK
FCT-PTDC/BIA- CBI/0625/2021
Post-doc
Universidade dos Açores - Campus de Angra do Heroísmo, Portugal

Universidade de Lisboa Centro de Ecologia Evolução e Alterações Ambientais, Portugal
Fundação para a Ciência e a Tecnologia
Ongoing
Outputs

Publications

Journal article
  1. Guilherme Oyarzabal; Gabor Pozsgai; Noelline Tsafack; Pedro Cardoso; François Rigal; Mário Boieiro; Ana M.C. Santos; et al. "Threats and conservation status of the endemic terrestrial arthropods of the Azores". Biological Conservation (2025): http://dx.doi.org/10.1016/j.biocon.2025.111282.
    10.1016/j.biocon.2025.111282
  2. Guilherme Oyarzabal; Pedro Cardoso; François Rigal; Mário Boieiro; Ana M. C. Santos; Isabel R. Amorim; Jagoba Malumbres-Olarte; et al. "Species traits may predict extinction risk of Azorean endemic arthropods". Insect Conservation and Diversity (2025): https://doi.org/10.1111/icad.12822.
    10.1111/icad.12822
  3. Guilherme Oyarzabal; Paulo A. V. Borges. "The Ripple Effects of Climate Change on Tibetan Alpine Arthropods". Global Change Biology (2025): https://doi.org/10.1111/gcb.70333.
    10.1111/gcb.70333
  4. Borges, P.A.V.; Malumbres-Olarte, J.; Gabriel, R.; Lhoumeau, S.; Ros-Prieto, A.; Pozsgai, G.; Oyarzabal, G.; et al. "Biodiversity insights from BioBlitz Surveys on Terceira Island, Azores". Biodiversity Data Journal 13 (2025): 1-33. http://www.scopus.com/inward/record.url?eid=2-s2.0-105006526427&partnerID=MN8TOARS.
    10.3897/BDJ.13.e153461
  5. Soares, B.E.; Moura, A.L.; DE ARAÚJO, V.N.; Azevedo, N.H.; Cardoso, A.C.A.; Cardoso, M.R.; De Carvalho, G.S.; et al. "The “Conhecimento Brasil” Program neglects the structural problems of Brazilian science and fails to offer a solution to the brain drain". Anais Da Academia Brasileira De Ciencias 97 1 (2025): http://www.scopus.com/inward/record.url?eid=2-s2.0-105001532881&partnerID=MN8TOARS.
    10.1590/0001-3765202520240496
  6. Oyarzabal, Guilherme; Guimarães, Murilo; Hebets, Eileen. "What do plants tell spiders about disturbances in grasslands?". Arachnology 19 9 (2024): http://dx.doi.org/10.13156/arac.2024.19.9.1211.
    Published • 10.13156/arac.2024.19.9.1211
  7. Guilherme Oyarzabal; Pedro Cardoso; François Rigal; Mário Boieiro; Ana M. C. Santos; Isabel R. Amorim; Jagoba Malumbres-Olarte; et al. "Arthropod traits as proxies for abundance trends in the Azorean Islands". Ecography (2024): https://doi.org/10.1111/ecog.07457.
    10.1111/ecog.07457
  8. Guilherme Oyarzabal; Murilo Guimarães. "Strands of connection: unraveling livestock grazing effects on orb-weaver spiders". Journal of Insect Conservation (2024): https://doi.org/10.1007/s10841-024-00560-9.
    10.1007/s10841-024-00560-9
  9. Pozsgai, G.; Lhoumeau, S.; Amorim, I.R.; Boieiro, M.; Costa, R.; Malumbres-Olarte, J.; Oyarzabal, G.; et al. "The BALA project: A pioneering monitoring of Azorean forest invertebrates over two decades (1999–2022)". Scientific Data 11 1 (2024): http://www.scopus.com/inward/record.url?eid=2-s2.0-85190303126&partnerID=MN8TOARS.
    10.1038/s41597-024-03174-7
  10. Guilherme Oyarzabal; Murilo Guimarães. "Friend and foe? The effects of grassland management on global patterns of spider diversity". Ecological Entomology (2021): https://doi.org/10.1111/een.13065.
    10.1111/een.13065
  11. "Short-term spider community monitoring after cattle removal in grazed grassland". Iheringia. Série Zoologia (2017): http://dx.doi.org/10.1590/1678-4766e2017033.
    10.1590/1678-4766e2017033
  12. "On the spider genus Neonella (Araneae: Salticidae): new records and taxonomic notes for species from southern South America". Zootaxa (2015): http://dx.doi.org/10.11646/zootaxa.3946.4.7.
    10.11646/zootaxa.3946.4.7
Preprint
  1. Guilherme Oyarzabal; Pedro Cardoso; François Rigal; Mário Boieiro; Ana M. C. Santos; Isabel Amorim; Jagoba Malumbres-Olarte; et al. "Arthropod traits as proxies for abundance trends in the Azorean Islands". 2024. https://doi.org/10.22541/au.171714597.73460036/v1.
    10.22541/au.171714597.73460036/v1
  2. Guilherme Oyarzabal; Murilo Guimarães. "STRANDS OF CONNECTION: LIVESTOCK GRAZING, VEGETATION DENSITY, AND ORB-WEAVER SPIDER PERSISTENCE". 2023. https://doi.org/10.1101/2023.11.19.567706.
    10.1101/2023.11.19.567706
Activities

Oral presentation

Presentation title Event name
Host (Event location)
2023/11/22 Uncovering arthropod abundance patterns in oceanic islands: Insights from the MACRISK Project. 22º Encontro Nacional de Ecologia
(Faro, Portugal)
2023/07/02 Summarizing traits to predict extinction and invasiveness of Northern Macaronesian arthropods: The MACRISK Project 4th Conference of the Society of Island Biology
(Lipari, Italy)
Distinctions

Award

2020 Doctoral Dissertation Research Abroad Program (DDRA)
2019 Destaque, Andressa Schütz Gigante. Sessão de Ecologia/Zoologia de Invertebrados I, XV Jornada de Iniciação Científica: O pastejo define a ocorrência de gravatá e aranha-tecedora-do-falso-gravatá
Fundação Zoobotânica do Rio Grande do Sul, Brazil
2018 Student Grant
Neotropical Grassland Conservancy, United States