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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
16/03/1999 |
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Data da última atualização: |
16/03/1999 |
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Autoria: |
FRENCH, N. R.; GRANT, W. E.; GRODZINSKI, W.; SWIFT, D. M. |
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Afiliação: |
US/IBP Grassland Biome, Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, Colorado, USA. |
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Título: |
Small mammal energetics in grassland ecosystems. |
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Ano de publicação: |
1976 |
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Fonte/Imprenta: |
Ecological Monographs, v.46, n.2, p.201-220, 1976. |
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Idioma: |
Inglês |
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Conteúdo: |
Results of quantitative sampling of small mammal populations at different grassland sites for a 3-yr period are compared to evaluate the energy requirements and consumption, according to trophic levels, for total small mammal communities at all season in different years. The purpose was to search for patterns of food utilization by these consumers at the different sites. This picture of the bioenergetics of small mammal populations over a wide range of grassland sites was conducted from extensive US/IBP Grassland Biome diet and population data and from physiological information out of the literature. The work represents one step in the process of understanding the role of consumers in the ecosystems. No species occurs at all sites and different trophic strategies predominate among the small mammals at each site: Microtines (herbivores) dominate the tallgrass prairie, sciurids (omnivores) dominate the northern shortgrass prairie, and heteromyids (granivores) dominate the bunchgrass and desert grasslands. Other groups occur at these sites and vary in their importance. At the tallgrass and midgrass sites the small mammal populations are largely dependent on herbage consumption, while at the northern and southern shortgrass prairie sites the rodent fauna is largely dependent on invertebrates. The most unidorm distribution of resource utilization by this component of the consumer community occurs at the desert grassland site, where herbage, seeds, and animal matter are all utilize. Relative to the total amount of consumable herbage available (that actually utilized by the small mammal population), this resource is only slightly utilized (from a fraction to a few percent of available). Animal matter, largely invertebrates, is higly utilized at most sites and may in fact be a limiting factor on small mammal populations. The energy consumed by the small mammal population was greatest at the tallgrass prairie site, where the average annual consumption was 172 x 10 kcal/ha (= 720 MJ/ha). However, efficiency of biomass support was greatest at the northern shortgrass prairie site, where consumption of 32 x 10 kcal/ha (= 134 MJ/ha) supported proportionately more biomass (277 g live wt./ha) of animals than at the tallgrass site (935 g/ha). The estimates of population energy requirements presented here compare well with other available estimates. These results emphasize the great between year and site variability, however. Daily population respiration in summer may be as little as 14 and as large as 1,038 kcal - ha-1 day-1. Highest small mammal biomass occurred at the tallgrass (3,075 g live wt./ha) and the desert (2,304 g/ha) sites, and lowest at the midgrass (14 g/ha) site. Within the period of study, small mammal biomass was most stable at the southern shortgrass site and most variable at the tallgrass site. The role of small population in grassland ecosystem remains incompletely defined. A broader view of the total consumer community in relation to resources is required. MenosResults of quantitative sampling of small mammal populations at different grassland sites for a 3-yr period are compared to evaluate the energy requirements and consumption, according to trophic levels, for total small mammal communities at all season in different years. The purpose was to search for patterns of food utilization by these consumers at the different sites. This picture of the bioenergetics of small mammal populations over a wide range of grassland sites was conducted from extensive US/IBP Grassland Biome diet and population data and from physiological information out of the literature. The work represents one step in the process of understanding the role of consumers in the ecosystems. No species occurs at all sites and different trophic strategies predominate among the small mammals at each site: Microtines (herbivores) dominate the tallgrass prairie, sciurids (omnivores) dominate the northern shortgrass prairie, and heteromyids (granivores) dominate the bunchgrass and desert grasslands. Other groups occur at these sites and vary in their importance. At the tallgrass and midgrass sites the small mammal populations are largely dependent on herbage consumption, while at the northern and southern shortgrass prairie sites the rodent fauna is largely dependent on invertebrates. The most unidorm distribution of resource utilization by this component of the consumer community occurs at the desert grassland site, where herbage, seeds, and animal matter are all utiliz... Mostrar Tudo |
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Palavras-Chave: |
Ecosystem; Grassland; Pequeno mamifero; Pradaria; Small mammal energetics. |
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Thesagro: |
Ecossistema; Pastagem; Roedor. |
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Thesaurus Nal: |
prairies; rodents. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03700naa a2200277 a 4500
001 1794309
005 1999-03-16
008 1976 bl --- 0-- u #d
100 1 $aFRENCH, N. R.
245 $aSmall mammal energetics in grassland ecosystems.
260 $c1976
520 $aResults of quantitative sampling of small mammal populations at different grassland sites for a 3-yr period are compared to evaluate the energy requirements and consumption, according to trophic levels, for total small mammal communities at all season in different years. The purpose was to search for patterns of food utilization by these consumers at the different sites. This picture of the bioenergetics of small mammal populations over a wide range of grassland sites was conducted from extensive US/IBP Grassland Biome diet and population data and from physiological information out of the literature. The work represents one step in the process of understanding the role of consumers in the ecosystems. No species occurs at all sites and different trophic strategies predominate among the small mammals at each site: Microtines (herbivores) dominate the tallgrass prairie, sciurids (omnivores) dominate the northern shortgrass prairie, and heteromyids (granivores) dominate the bunchgrass and desert grasslands. Other groups occur at these sites and vary in their importance. At the tallgrass and midgrass sites the small mammal populations are largely dependent on herbage consumption, while at the northern and southern shortgrass prairie sites the rodent fauna is largely dependent on invertebrates. The most unidorm distribution of resource utilization by this component of the consumer community occurs at the desert grassland site, where herbage, seeds, and animal matter are all utilize. Relative to the total amount of consumable herbage available (that actually utilized by the small mammal population), this resource is only slightly utilized (from a fraction to a few percent of available). Animal matter, largely invertebrates, is higly utilized at most sites and may in fact be a limiting factor on small mammal populations. The energy consumed by the small mammal population was greatest at the tallgrass prairie site, where the average annual consumption was 172 x 10 kcal/ha (= 720 MJ/ha). However, efficiency of biomass support was greatest at the northern shortgrass prairie site, where consumption of 32 x 10 kcal/ha (= 134 MJ/ha) supported proportionately more biomass (277 g live wt./ha) of animals than at the tallgrass site (935 g/ha). The estimates of population energy requirements presented here compare well with other available estimates. These results emphasize the great between year and site variability, however. Daily population respiration in summer may be as little as 14 and as large as 1,038 kcal - ha-1 day-1. Highest small mammal biomass occurred at the tallgrass (3,075 g live wt./ha) and the desert (2,304 g/ha) sites, and lowest at the midgrass (14 g/ha) site. Within the period of study, small mammal biomass was most stable at the southern shortgrass site and most variable at the tallgrass site. The role of small population in grassland ecosystem remains incompletely defined. A broader view of the total consumer community in relation to resources is required.
650 $aprairies
650 $arodents
650 $aEcossistema
650 $aPastagem
650 $aRoedor
653 $aEcosystem
653 $aGrassland
653 $aPequeno mamifero
653 $aPradaria
653 $aSmall mammal energetics
700 1 $aGRANT, W. E.
700 1 $aGRODZINSKI, W.
700 1 $aSWIFT, D. M.
773 $tEcological Monographs$gv.46, n.2, p.201-220, 1976.
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Registro original: |
Embrapa Pantanal (CPAP) |
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| Registros recuperados : 18 | |
| 5. |  | COUTO, C. S.; PEREIRA NETO, L. G.; PADILHA, L. S.; MONTEIRO, J. S. A importãncia do sibrargen na gestão da coleção de base. In : ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 12., 2007, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2007. p. 191.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 6. | | FAIAD, M. G. R.; MUNDIN, R. C.; PADILHA, L. S.; SALOMAO, A. N. Efeito de tratamento sobre a incidencia fungica e o poder germinativo em sementes de quatro progenies de Schinpsis brasiliensis (brauna). In: SEMINARIO PANAMERICAMO DE SEMILLAS, 15., WORKSHOP SOBRE MARKETING EM SEMENTES E MUDAS, 3., 1996, Gramado, RS. Anais. [S.l.]: Federation Latinoamericana de Asociaciones de Semillas, 1996. p.96 p.96| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 7. | | PEREIRA, G. A.; MIRANDA, A. R.; PADILHA, L. S.; MUNDIM, R. C.; ALVES, R. B. N. Conservação Ex situ de variedades tradicionais de milho indígena. In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 5., 2000, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2000. p. 60.| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 8. | | MIRANDA, A. R. de; WETZEL, M. M. V. S.; CORDEIRO, C. M. T.; PADILHA, L. S. Efeito de baixas temperaturas sobre a conservacao de sementes dessecadas de algodao Gossypium hirsutum L., com e sem Linter. In: SEMINARIO PANAMERICANO DE SEMILLAS, 15., WORKSHOP SOBRE MARKETING EM SEMENTES E MUDAS, 3., Gramado, RS., Anais. [S.l.]: Federacion Latinoamericana de Asociaciones de Semillas, 1996. p.22. p.22| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 11. | | FAIAD, M. G. R.; URBEN, A. F.; PADILHA, L. S.; ANDRADE, A. C. S.; SANTOS, M. F. Efeito de temperatura na detecção fungica e germinação de sementes de Mauritia flexuosa L.F. (Buriti). Fitopatologia Brasileira, Brasilia, v.21, p.389, 1996, Suplemento. Apresentado no 29º Congresso Brasileiro de Fitopatologia.| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 13. | | SANTOS, C. P.; PEREIRA NETO, L. G.; GOMES, T. R. C.; PADILHA, L. S.; MAMÃO, J. B. Monitoração de acessos de Phaseolus lunatus L. da coleçao de base da Embrapa. In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 13., 2008, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2008. Resumo 161. p. 214.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 14. | | PÁDUA, J. G.; JOSÉ, S. C. B. R.; QUEIROZ, A. P. de; PADILHA, L. S.; VIEIRA, R. da C.; PAIS, V. de O. Avaliação da qualidade fisiológica da coleção de base de arroz da Embrapa. In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 4., 2016, Curitiba. Recursos genéticos no Brasil: a base para o desenvolvimento sustentável: anais. Brasília, DF: Sociedade Brasileira de Recursos Genéticos, 2016.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 15. | | RANGEL, P. H. N.; PADUA, J. G.; ABREU, A. G. de; QUEIROZ, A. P. de; VIEIRA, R. da C.; PADILHA, L. S. Comparação de dois métodos para avaliação do poder germinativo de sementes de acessos de arroz. Revista RG News, v. 4, n. 3, p. 401, 2018 Edição especial dos Anais do 5 Congresso Brasileiro de Recursos Genéticos, Fortaleza, nov. 2018.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão; Embrapa Recursos Genéticos e Biotecnologia. |
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| 16. | | PADUA, J. G.; ALMEIDA, F. F. de; SOARES, F. M.; QUEIROZ, A. P. de; PAIS, V. de O.; PADILHA, L. S. Efeito de diferentes métodos de secagem sobre a qualidade de sementes de cevada. In: SIMPÓSIO DE RECURSOS GENÉTICOS PARA AMÉRICA LATINA E O CARIBE, 10., 2015, Bento Gonçalves. Anais... Bento Gonçalves: Aptor Software, 2015. p. 163.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 17. | | FAIAD, M. G. R.; DORES, E. R. das; MAMAO, J. B.; ROCHA, L. M. T.; P. NETO, L. G.; PADILHA, L. S.; PAIS, V. de S.; BARBOSA, V. da R. Conservacao de germoplasma -semente a longo prazo no Brasil. In: SIMPOSIO DE RECURSOS GENETICOS PARA AMERICA LATINA E CARIBE, 2., 1999, Brasilia, DF. Anais... Brasilia: Embrapa Recursos Geneticos e Biotecnologia, 1999. CD-ROM.| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 18. | | PADUA, J. G.; JOSE, S. C. B. R.; SALOMAO, A. N.; GOEDERT, C. O.; GIMENES, M. A.; PEREIRA NETO, L. G.; CURI, C. C. da S.; PADILHA, L. S.; PAIS, V. de O.; ROSA, A. P.; QUEIROZ, A. P. de. Treinta anos de conservación de germoplasma de semillas a largo prazo en Embrapa. In: SIMPOSIO INTERNACIONAL DE RECURSOS GENÉTICOS PARA AMÉRICA LATINA Y EL CARIBE, 8., 2011, Quito. [Proceedings...] Quito: INIAP, 2011.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| Registros recuperados : 18 | |
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