1. Human-modified landscapes narrow the isotopic niche of neotropical birds
- Author
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Ana Beatriz Navarro, Juliano André Bogoni, Wesley Rodrigues Silva, Marco Aurélio Pizo, Katia Maria Paschoaletto Micchi de Barros Ferraz, Daniela Tomasio Apolinario da Luz, Luís Fábio Silveira, Marcelo Magioli, Vanessa Cristina de Oliveira, Eduardo Roberto Alexandrino, Augusto João Piratelli, Marcelo Zacharias Moreira, Alexander V. Christianini, Reginaldo José Donatelli, Universidade de São Paulo (USP), Universidade Estadual Paulista (Unesp), Universidade Estadual de Campinas (UNICAMP), Universidade Federal de São Carlos (UFSCar), Inst Chico Mendes Conservacao Biodiversidade, Inst Nacl Mata Atlantica, and Inst Procarnivoros
- Subjects
0106 biological sciences ,Ecological niche ,Nitrogen ,Ecology ,010604 marine biology & hydrobiology ,Niche ,Biology ,010603 evolutionary biology ,01 natural sciences ,Carbon ,Habitat destruction ,Frugivore ,Trophic ecology ,Habitat ,Guild ,Omnivore ,Ecology, Evolution, Behavior and Systematics ,Stable isotopes ,Trophic level - Abstract
Made available in DSpace on 2021-06-25T15:01:45Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-04-09 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Deforestation and habitat loss resulting from land use changes are some of the utmost anthropogenic impacts that threaten tropical birds in human-modified landscapes (HMLs). The degree of these impacts on birds' diet, habitat use, and ecological niche can be measured by isotopic analysis. We investigated whether the isotopic niche width, food resources, and habitat use of bird trophic guilds differed between HMLs and natural landscapes (NLs) using stable carbon (delta C-13) and nitrogen isotopes (delta N-15). We analyzed feathers of 851 bird individuals from 28 landscapes in the Brazilian Atlantic Forest. We classified landscapes into two groups according to the percentage of forest cover (HMLs = 47%), and compared the isotopic niche width and mean values of delta C-13 and delta N-15 for each guild between landscape types. The niches of frugivores, insectivores, nectarivores, and omnivores were narrower in HMLs, whereas granivores showed the opposite pattern. In HMLs, nectarivores showed a reduction of 44% in niche width, while granivores presented an expansion of 26%. Individuals in HMLs consumed more resources from agricultural areas (C-4 plants), but almost all guilds showed a preference for forest resources (C-3 plants) in both landscape types, except granivores. Degraded and fragmented landscapes typically present a lower availability of habitat and food resources for many species, which was reflected by the reduction in niche width of birds in HMLs. Therefore, to protect the diversity of guilds in HMLs, landscape management strategies that offer birds more diverse habitats must be implemented in tropical regions. Univ Sao Paulo, Dept Ciencias Florestais, Lab Ecol Manejo & Conservaeao Fauna Silvestre LEM, Escola Super Agr Luiz de Queiroz, Av Padua Dias 11, BR-13418900 Piracicaba, SP, Brazil Univ Sao Paulo, Ctr Energia Nucl Agr, Lab Ecol Isotop, Av Centenario 303, BR-13416903 Piracicaba, SP, Brazil Univ Sao Paulo, Museu Zool, Secao Aves, Av Nazare 481, BR-04263000 Sao Paulo, SP, Brazil Univ Estadual Paulista, Inst Biociencias, Dept Biodiversidade, Av 24-A 1515, BR-13506900 Rio Claro, SP, Brazil Univ Estadual Campinas, Inst Biol, Dept Biol Anim, Lab Interacoes Vertebrados Plantas, Rua Monteiro Lobato 255, BR-13083862 Campinas, SP, Brazil Univ Estadual Paulista, Fac Ciencias, Dept Ciencias Biol, Av Eng Luiz Edmundo Carrijo Coube 14-01, BR-17033360 Bauru, SP, Brazil Univ Fed Sao Carlos, Ctr Ciencias & Tecnol Sustentabilidade, Dept Ciencias Ambientais, Rodovia Joao Leme dos Santos SP-264 Km 110, BR-18052780 Sorocaba, SP, Brazil Inst Chico Mendes Conservacao Biodiversidade, Ctr Nacl Pesquisa & Conservacao Mamiferos Carnivo, Estr Municipal Hisaichi Takebayashi 8600, BR-12952011 Atibaia, SP, Brazil Inst Nacl Mata Atlantica, Av Jose Ruschi 4, BR-29650000 Santa Teresa, ES, Brazil Inst Procarnivoros, Av Horacio Netto 1030,Parque Edmundo Zanoni, BR-12945010 Atibaia, SP, Brazil Univ Estadual Paulista, Inst Biociencias, Dept Biodiversidade, Av 24-A 1515, BR-13506900 Rio Claro, SP, Brazil Univ Estadual Paulista, Fac Ciencias, Dept Ciencias Biol, Av Eng Luiz Edmundo Carrijo Coube 14-01, BR-17033360 Bauru, SP, Brazil FAPESP: 2010/05343-5 FAPESP: 2011/06782-5 FAPESP: 2011/04046-0 FAPESP: 2018-05970-1 FAPESP: 2020/076190 CAPES: 88882.328664/2019-01 CNPq: 300744/2020-0 CAPES: 001-CAPES PNPD 2013/1723 CNPq: 308632/2018-4 CNPq: 302291/2015-6 CNPq: 308337/2019-0 CNPq: 304742/2019-8
- Published
- 2021