76 resultados para Food Yellow 3
Filtro por publicador
- Repository Napier (1)
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- AMS Tesi di Dottorato - Alm@DL - Università di Bologna (9)
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- Aquatic Commons (53)
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- CentAUR: Central Archive University of Reading - UK (73)
- Chinese Academy of Sciences Institutional Repositories Grid Portal (76)
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- Comissão Econômica para a América Latina e o Caribe (CEPAL) (3)
- CORA - Cork Open Research Archive - University College Cork - Ireland (24)
- Deakin Research Online - Australia (93)
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- DigitalCommons@University of Nebraska - Lincoln (1)
- Duke University (1)
- eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (14)
- Greenwich Academic Literature Archive - UK (2)
- Harvard University (4)
- Helda - Digital Repository of University of Helsinki (13)
- Indian Institute of Science - Bangalore - Índia (9)
- Instituto Nacional de Saúde de Portugal (1)
- Instituto Politécnico de Viseu (1)
- Instituto Politécnico do Porto, Portugal (3)
- Ministerio de Cultura, Spain (1)
- National Center for Biotechnology Information - NCBI (11)
- Plymouth Marine Science Electronic Archive (PlyMSEA) (17)
- Publishing Network for Geoscientific & Environmental Data (64)
- QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (58)
- Queensland University of Technology - ePrints Archive (76)
- Repositório digital da Fundação Getúlio Vargas - FGV (1)
- Repositório Digital da UNIVERSIDADE DA MADEIRA - Portugal (1)
- Repositorio Institucional da UFLA (RIUFLA) (1)
- Repositório Institucional da Universidade Federal do Rio Grande - FURG (3)
- Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (124)
- RUN (Repositório da Universidade Nova de Lisboa) - FCT (Faculdade de Cienecias e Technologia), Universidade Nova de Lisboa (UNL), Portugal (2)
- SAPIENTIA - Universidade do Algarve - Portugal (2)
- Universidad de Alicante (3)
- Universidad del Rosario, Colombia (3)
- Universidad Politécnica de Madrid (33)
- Universidade de Lisboa - Repositório Aberto (2)
- Universidade Federal do Pará (5)
- Universidade Federal do Rio Grande do Norte (UFRN) (3)
- Universidade Técnica de Lisboa (1)
- Universita di Parma (1)
- Universitat de Girona, Spain (1)
- Universitätsbibliothek Kassel, Universität Kassel, Germany (10)
- Université de Lausanne, Switzerland (7)
- Université de Montréal, Canada (3)
- University of Michigan (35)
- University of Queensland eSpace - Australia (11)
- University of Washington (2)
Resumo:
Geo-ecological transect studies in the pastures of the upper catchment of the HuangHe (99 degrees 30'-100 degrees 00'E/35 degrees 30'-35 degrees 40'N'; 3,000-4,000 in a.s.l., Qinghai province, China) revealed evidence that pastures replace forests. Plot-based vegetation records and fenced grazing exclosure experiments enabled the identification of grazing indicator plants for the first time. The mapping of vegetation patterns of pastures with isolated juniper and Spruce forests raise questions as to the origin of the grasslands, which arc widely classified as "natural" at present. Soil investigations and charcoal fragments of Juniperus (8,153 +/- 63 uncal BP) and Picea (6,665 +/- 59 uncal BP) provide evidence of the wider presence of forests. As temperatures and rainfall records undoubtedly represent a forest climate, it is assumed that the present pastures have replaced forests. Circumstantial evidence arising from investigations into the environmental history of the Holocene effectively substantiates this theory.