scholarly journals Palaeoclimates and Amazon biodiversity

2013 ◽  
Vol 40 (8) ◽  
pp. 1413-1414 ◽  
Author(s):  
Valentí Rull
Keyword(s):  
Amazon Biodiversity

scholarly journals Effect of Mineral Supplementation on the Macromineral Concentration in Blood in Pre- and Postpartum Blackbelly Sheep

Animals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1206
Author(s):  
Juan Carlos Moyano Tapia ◽  
Simon Alexander Leib ◽  
Pablo Roberto Marini ◽  
Maria Laura Fischman
Keyword(s):  
Field Work ◽  
Amazon Region ◽  
Production Cycle ◽  
Mineral Supplement ◽  
Significance Level ◽  
Mineral Supplementation ◽  
Ecuadorian Amazon ◽  
Free Grazing ◽  
Group 2 ◽  
Amazon Biodiversity

The objective of this study was to determine the effect of mineral supplementation on the serum concentration of calcium, phosphorus, and magnesium in pre- and postpartum Blackbelly sheep throughout three successive lambing periods under free grazing conditions in the Ecuadorian Amazon Region. The field work was carried out between January 2015 and February 2018 using 20 Blackbelly sheep belonging to the Centre for Research, Postgraduate Studies and Conservation of Amazon Biodiversity, Ecuador. The flock was randomly divided into two groups: Group 1 (G1) was fed with forage plus a supplementation (Pecutrin® Mineral supplement plus vitamins A, D3, and E. Bayer HealthCare) and Group 2 (G2) was fed only with forage without mineral supplementation. Three blood samples from the coccygeal vein were taken from each sheep 30 days before lambing, 30 days after, and 60 days after lambing. Concerning the average of calcium, significant differences were found at different times inside each group and also between them (p < 0.0001 in both cases). As for the phosphorus, significant differences were found between the means of the groups for all times from 30 days after the second lambing season (p < 0.05). It was observed that the groups differed significantly in terms on the average of magnesium (considering a significance level of 0.05) 30 days before the first lambing and at all times measured from the 30 days after the second lambing (p < 0.005). In this study, we showed that Blackbelly sheep raised under free grazing conditions in the Ecuadorian Amazon Region had very low serum calcium values, and supplementation was unable to improve them. Meanwhile, phosphorus and magnesium levels were below the required values, but after supplementation, they exceeded the minimum threshold. Mineral supplementation in the rearing of sheep in grazing systems is necessary during the entire production cycle, but it must be done taking into account the soil–plant–animal relationship specifically for the Amazonian Region systems.

The intrinsic value of Amazon biodiversity

2021 ◽  
Vol 30 (4) ◽  
pp. 1199-1202
Author(s):  
Philip M. Fearnside
Keyword(s):  
Intrinsic Value ◽  
Amazon Biodiversity

Amazon biodiversity and conservation

2009 ◽  
Vol 122 (1) ◽  
pp. 176
Author(s):  
Michael Heinrich
Keyword(s):  
Amazon Biodiversity

scholarly journals Peace in Colombia is a critical moment for Neotropical connectivity and conservation: Save the northern Andes-Amazon biodiversity bridge

2018 ◽  
Vol 12 (1) ◽  
pp. e12594 ◽  
Author(s):  
Nicola Clerici ◽  
Camilo Salazar ◽  
Carolina Pardo-Díaz ◽  
Chris D. Jiggins ◽  
James E. Richardson ◽  
...  
Keyword(s):  
Northern Andes ◽  
Critical Moment ◽  
Amazon Biodiversity

scholarly journals New geological framework for Western Amazonia (Brazil) and implications for biogeography and evolution

2005 ◽  
Vol 63 (1) ◽  
pp. 78-89 ◽  
Author(s):  
Dilce de Fátima Rossetti ◽  
Peter Mann de Toledo ◽  
Ana Maria Góes
Keyword(s):  
Image Interpretation ◽  
Flood Plain ◽  
Climatic Conditions ◽  
Early Pleistocene ◽  
Fluvial System ◽  
Depositional History ◽  
Lake System ◽  
History Of ◽  
Amazon Biodiversity

Although many of the current hypotheses to explain the origin and distribution of the Amazon biodiversity has been based directly or indirectly on geological data, the reconstruction of the geological history of the Amazon region is still inadequate to analyze its relationship with the biodiversity. This work has the main goal to characterize the sedimentary successions formed in the Brazilian Amazon in the Neogene-Quaternary discussing the evolution of the depositional systems through time and analyzing their main controlling mechanisms in order to fill up this gap. Radar image interpretation, sedimentological studies, and radiocarbon dating allowed the mapping of Plio-Pleistocene to Holocene units along the Solimões-Amazonas River, Brazil. This integrated work led to the characterization of five sedimentary successions overlying Miocene deposits of the Solimões/Pebas Formation, which include the following: Içá Formation (Plio-Pleistocene), deposits Q1 (37,400–43,700 14C yr B.P.), deposits Q2 (27,200 14C yr B.P.), deposits Q3 (6730–2480 14C yr B.P.), and deposits Q4 (280–130 14C yr B.P.). These deposits occur mostly to the west of Manaus, forming NW–SE elongated belts that are progressively younger from SW to NE, indicating a subsiding basin with a depocenter that migrated to the NE. The reconstruction of the depositional history is consistent with significant changes in the landscapes. Hence, the closure of a large lake system at the end of the Miocene gave rise to the development of a Plio-Pleistocene fluvial system. This was yet very distinct from the modern drainage, with shallow, energetic, highly migrating, braided to anastomosed channels having an overall northeast outlet. This fluvial system formed probably under climatic conditions relatively drier than today's. During the early Pleistocene, there was pronounced erosion, followed by a renewed depositional phase ca. 40,000 14C yr B.P., with the development of prograding lobes and/or crevasse splays associated with a lake system (i.e., fan-delta) and/or fluvial flood plain areas. After a period of erosion, a fluvial system with eastward draining channels started to develop at around 27,000 14C yr B.P. The fluvial channels were overflooded in mid-Holocene time. This flooding is attributed to an increased period of humidity, with a peak between 5000 and 2500 14C yr B.P. The data presented herein support that, rather than being a monotonous area, the Amazonia was a place with frequent changes in landscape throughout the Neogene-Quaternary, probably as a result of climatic and tectonic factors. We hypothesize that these changes in the physical environment stressed the biota, resulting in speciation and thus had a great impact on modern biodiversity.

Amazon Creative Labs of the Cupuaçu-Cocoa Chain

2021 ◽  
Author(s):  
Ismael Nobre ◽  
Andrea Margit ◽  
Carlos A. Nobre ◽  
Maritta Koch-Weser ◽  
Adalberto Veríssimo ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Human Development ◽  
Value Chain ◽  
Implementation Strategy ◽  
Forest Products ◽  
High Potential ◽  
Value Chains ◽  
Third Way ◽  
Amazon Biodiversity

Under the Amazon Third Way paradigm and its implementation strategy Amazon 4.0 the Amazon Creative Labs (ACL) were conceived, as a tool for training and for testing proposed concepts. Amazon 4.0 is an attempt to show that it is possible to achieve a stage of high human development combined with valuing of tropical forest through knowledge. This study demonstrates how to add value to value chains of the immense Amazon biodiversity and how to enable Amazonian populations to master bio-industrialization technologies of forest assets. The following example deals with the potential to develop bio-industries in the value chain of two forest products with high potential: cupuaçu and cocoa through the development of the so-called ACL. This will serve as an important experiment to guide several proposals being elaborated by the Scientific Panel for the Amazon.

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