Changes in seed rain across Atlantic Forest fragments in Northeast Brazil
The objectives of this study were to characterize the distribution of seeds in remnant fragments of the Atlantic Coastal Forest and to determine whether the species diversity, seed weight, and species composition of plant communities are altered by forest fragmentation. A transect of 100m was establ...
| Autor principal: | Freitas, Cíntia Gomes |
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| Outros Autores: | Sales Dambros, Cristian de, Camargo, José Luís Campana |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Acta Oecologica
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/17800 |
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oai:repositorio:1-17800 |
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oai:repositorio:1-17800 Changes in seed rain across Atlantic Forest fragments in Northeast Brazil Freitas, Cíntia Gomes Sales Dambros, Cristian de Camargo, José Luís Campana Biodiversity Disturbance Forest Cover Habitat Fragmentation Habitat Loss Identification Method Landscape Plant Community Seed Shade Tolerance Species Diversity Sugar Cane Atlantic Forest The objectives of this study were to characterize the distribution of seeds in remnant fragments of the Atlantic Coastal Forest and to determine whether the species diversity, seed weight, and species composition of plant communities are altered by forest fragmentation. A transect of 100m was established in the core of each of nine fragments of Atlantic Coastal Forest in a private sugarcane plantation in the state of Alagoas, NE Brazil, and ten seed-traps were distributed at intervals of 10m each along the transects. For 12 consecutive months seeds were collected, dried, counted, weighed, and identified to species. Seeds were assigned to categories according to their size, dispersal mode, and shade tolerance. Multiple regression models and Mantel correlation tests were used to detect the effects of fragment size, percent forest cover nearby, distance from the source area, and distance from the nearest fragment on species diversity, mean seed weight, and species similarity. Analyses were carried out for all species and for subsets corresponding to each seed category. A total of 21,985 diaspores of 190 species were collected. Most seeds were small, shade-intolerant, and zoochoric, which corroborates other studies of fragmented forest landscapes and reflects the high disturbance levels in isolated forest remnants. Our data indicate that fragmentation processes such as habitat loss can alter species diversity and species composition by reducing habitat availability and increasing fragment isolation. We also found that large-seeded species are more affected by fragment isolation, possibly because their seed dispersers rarely cross non-forested areas between fragments, while zoochoric species are more strongly affected by fragment size and apparently more strongly associated with local edaphic conditions than with distance from seed sources. © 2013 Elsevier Masson SAS. 2020-06-15T21:49:21Z 2020-06-15T21:49:21Z 2013 Artigo https://repositorio.inpa.gov.br/handle/1/17800 10.1016/j.actao.2013.08.005 en Volume 53, Pags. 49-55 Restrito Acta Oecologica |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Biodiversity Disturbance Forest Cover Habitat Fragmentation Habitat Loss Identification Method Landscape Plant Community Seed Shade Tolerance Species Diversity Sugar Cane Atlantic Forest |
| spellingShingle |
Biodiversity Disturbance Forest Cover Habitat Fragmentation Habitat Loss Identification Method Landscape Plant Community Seed Shade Tolerance Species Diversity Sugar Cane Atlantic Forest Freitas, Cíntia Gomes Changes in seed rain across Atlantic Forest fragments in Northeast Brazil |
| topic_facet |
Biodiversity Disturbance Forest Cover Habitat Fragmentation Habitat Loss Identification Method Landscape Plant Community Seed Shade Tolerance Species Diversity Sugar Cane Atlantic Forest |
| description |
The objectives of this study were to characterize the distribution of seeds in remnant fragments of the Atlantic Coastal Forest and to determine whether the species diversity, seed weight, and species composition of plant communities are altered by forest fragmentation. A transect of 100m was established in the core of each of nine fragments of Atlantic Coastal Forest in a private sugarcane plantation in the state of Alagoas, NE Brazil, and ten seed-traps were distributed at intervals of 10m each along the transects. For 12 consecutive months seeds were collected, dried, counted, weighed, and identified to species. Seeds were assigned to categories according to their size, dispersal mode, and shade tolerance. Multiple regression models and Mantel correlation tests were used to detect the effects of fragment size, percent forest cover nearby, distance from the source area, and distance from the nearest fragment on species diversity, mean seed weight, and species similarity. Analyses were carried out for all species and for subsets corresponding to each seed category. A total of 21,985 diaspores of 190 species were collected. Most seeds were small, shade-intolerant, and zoochoric, which corroborates other studies of fragmented forest landscapes and reflects the high disturbance levels in isolated forest remnants. Our data indicate that fragmentation processes such as habitat loss can alter species diversity and species composition by reducing habitat availability and increasing fragment isolation. We also found that large-seeded species are more affected by fragment isolation, possibly because their seed dispersers rarely cross non-forested areas between fragments, while zoochoric species are more strongly affected by fragment size and apparently more strongly associated with local edaphic conditions than with distance from seed sources. © 2013 Elsevier Masson SAS. |
| format |
Artigo |
| author |
Freitas, Cíntia Gomes |
| author2 |
Sales Dambros, Cristian de Camargo, José Luís Campana |
| author2Str |
Sales Dambros, Cristian de Camargo, José Luís Campana |
| title |
Changes in seed rain across Atlantic Forest fragments in Northeast Brazil |
| title_short |
Changes in seed rain across Atlantic Forest fragments in Northeast Brazil |
| title_full |
Changes in seed rain across Atlantic Forest fragments in Northeast Brazil |
| title_fullStr |
Changes in seed rain across Atlantic Forest fragments in Northeast Brazil |
| title_full_unstemmed |
Changes in seed rain across Atlantic Forest fragments in Northeast Brazil |
| title_sort |
changes in seed rain across atlantic forest fragments in northeast brazil |
| publisher |
Acta Oecologica |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/17800 |
| _version_ |
1787141068065603584 |
| score |
11.653393 |