Climate response and drought resilience of Nothofagus obliqua secondary forests across a latitudinal gradient in south-central Chile

2021 ◽  
Vol 485 ◽  
pp. 118962
Author(s):  
R. Urrutia-Jalabert ◽  
J. Barichivich ◽  
V. Rozas ◽  
A. Lara ◽  
Y. Rojas ◽  
...  
Keyword(s):  
Latitudinal Gradient ◽  
Secondary Forests ◽  
Climate Response ◽  
Central Chile ◽  
South Central ◽  
Drought Resilience ◽  
Nothofagus Obliqua

Spatial patterns in an old-growth Nothofagus obliqua forest in south-central Chile

2006 ◽  
Vol 231 (1-3) ◽  
pp. 38-46 ◽  
Author(s):  
Christian Salas ◽  
Valerie LeMay ◽  
Patricio Núñez ◽  
Patricio Pacheco ◽  
Alejandro Espinosa
Keyword(s):  
Spatial Patterns ◽  
Old Growth ◽  
Central Chile ◽  
South Central ◽  
Nothofagus Obliqua

scholarly journals Soil Quality Changes within a (Nothofagus obliqua) Forest Under Silvopastoral Management in the Andes Mountain Range, South Central Chile

2020 ◽  
Vol 12 (17) ◽  
pp. 6815
Author(s):  
Juan Ortiz ◽  
Francis Dube ◽  
Pablo Neira ◽  
Marcelo Panichini ◽  
Neal B. Stolpe ◽  
...  
Keyword(s):  
Soil Quality ◽  
Soil Degradation ◽  
Sustainable Land Use ◽  
Mountain Range ◽  
Organic C ◽  
Central Chile ◽  
The Andes ◽  
South Central ◽  
Nothofagus Obliqua ◽  
Physical And Chemical

In Chile, 49.1% of the national territory is affected by soil degradation (including erosion and loss of soil organic matter), whereby of the 51.7 Mha that have been historically associated with agricultural-livestock and forestry activities, only 35.5 Mha are being used at the present. Consequently, soil degradation has resulted in the release of about 11.8 Gg yr−1 of carbon (C) equivalent (CO2eq) to the atmosphere. Silvopastoral systems (SPS), however, can increase soil organic C (SOC) through sequestration (C→SOC), improve ecosystem services, and have been internationally recommended for sustainable land use. Therefore, it was proposed to determine the effects of SPS on soils, over five years, in degraded sites that were located in the Ranchillo Alto (SPS-RA) (37°04′52″ S, 71°39′14″ W), Ñuble region. The sites were rated according to previous canopy disturbance levels (+) as follows: open (Op)+++, semi open (SOp)++, and semi closed (SC)+. The analysis was performed on different physical and chemical soil properties (0–5 and 5–20 cm depths), that were expressed as soil indicators (SIND) for chemical and physical properties, which were used to calculate a soil quality (SQ) index (SQI). The results indicated overall SQI values of 37.6 (SC) > 29.8 (Op) > 28.8 (SOp), but there were no significant variations (p < 0.05) in physical SQ, whereas chemical SQ varied in all conditions, mostly at 0–5 cm in Op and SOp. Increases of SOC were also observed (2015–2018 period) of 22.5, 14.5, and 4.8 Mg ha−1 for SOp, Op, and SC, respectively, showing that SPS promote the reclamation of Ranchillo Alto soils.

scholarly journals Cardiorespiratory Fitness: Reference on the Six-Minute Walk Test and Oxygen Consumption in Adolescents from South-Central Chile

2021 ◽  
Vol 18 (5) ◽  
pp. 2474
Author(s):  
Jaime Vásquez-Gómez ◽  
Nelson Gatica Salas ◽  
Pedro Jiménez Villarroel ◽  
Luis Rojas-Araya ◽  
Cesar Faundez-Casanova ◽  
...  
Keyword(s):  
Cardiorespiratory Fitness ◽  
Reference Values ◽  
Estimation Error ◽  
Walk Test ◽  
Central Chile ◽  
Six Minute Walk Test ◽  
Body Adiposity ◽  
South Central ◽  
Males And Females ◽  
Minute Walk

Cardiorespiratory fitness (CRF) provides oxygen to the exercising muscles and is related to body adiposity, with cardiometabolic variables. The aim was to develop reference values and a predictive model of CRF in Chilean adolescents. A total of 741 adolescents of both genders (15.7 years old) participated in a basic anthropometry, performance in the six-minute walk test (SMWT), and in Course Navette was measured. Percentiles were determined for the SMWT, for the V̇O2max, and an equation was developed to estimate it. The validity of the equation was checked using distribution assumptions and the Bland–Altman diagram. The STATA v.14 program was used (p < 0.05). The 50th percentile values for males and females in the SMWT and in the V̇O2max of Course Navette were, respectively, from 607 to 690 and from 630 to 641 m, and from 43.9 to 45 and from 37.5 to 31.5 mlO2·kg·min−1, for the range of 13 to 17 years. For its part, the model to predict V̇O2max incorporated gender, heart rate, height, waist-to-height ratio (WHR), and distance in the SMWT (R2 = 0.62; estimation error = 0.38 LO2·min−1; p <0.001). Reference values can guide physical fitness in Chilean adolescents, and V̇O2max was possible to predict from morphofunctional variables.

Population Abundances, Tidal Movement, Burrowing Ability and Oxygen Uptake of Emerita analoga (Stimpson) (Crustacea, Anomura) on a Sandy Beach of South-Central Chile

2004 ◽  
Vol 25 (1) ◽  
pp. 71-89 ◽  
Author(s):  
Mariano Lastra ◽  
Eduardo Jaramillo ◽  
Jesus Lopez ◽  
Heraldo Contreras ◽  
Cristian Duarte ◽  
...  
Keyword(s):  
Oxygen Uptake ◽  
Sandy Beach ◽  
Central Chile ◽  
South Central ◽  
Emerita Analoga ◽  
Tidal Movement
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