Results 11 to 20 of about 14,793 (156)

Mountain wetland soil carbon stocks of Huascarán National Park, Peru

open access: yesFrontiers in Plant Science, 2023
Although wetlands contain a disproportionately high amount of earth’s total soil carbon, many regions are still poorly mapped and with unquantified carbon stocks.
Rodney A. Chimner   +6 more
doaj   +1 more source

Vegetation of Andean wetlands (bofedales) in Huascarán National Park, Peru [PDF]

open access: yesMires and Peat, 2019
Hybrid terrestrial-aquatic ecosystems in the Andes, commonly known as bofedales, consist of both peatlands and wet meadows and line valley floors at elevations > 3800 m.
M.H. Polk, K.R. Young, A. Cano, B. León
doaj   +1 more source

A Puna Collection of Senecio punae , Main Source of a Versatile Eremophilane-type Ketone [PDF]

open access: yesNatural Product Communications, 2016
Senecio punae Cabrera (Asteraceae-Senecioneae) is an endemic species from Puna semi-desert region of Argentina. The major compound, 4β,5β-eremophil-7(11)9-dien-8-one, also known as dehydrofukinone (D), was isolated from the diethyl ether extract (E) of the plant.
Rodriguez, Ana María del Valle   +4 more
openaire   +3 more sources

Puestos de altura de la Puna argentina: zooarqueología de Real Grande 1 y 6 y Alero Tomayoc

open access: yesRevista del Museo de Antropologia, 2009
The societies from the Late Period in the Argentinean Puna introduced considerable technical improvements and an increase in agricultural production, in relationship with a process of change towards a greater sociopolitical complexity.
Daniel E. Olivera 1, Jennifer L. Grant
doaj   +5 more sources

Zooarqueología y análisis de isótopos estables en un contexto pastoril

open access: yesEstudios Atacameños, 2021
El objetivo de este trabajo consiste en estudiar y discutir las estrategias de explotación de camélidos sudamericanos empleadas por los ocupantes del sitio arqueológico Cueva Chayal (departamento de Susques, provincia de Jujuy, Argentina) durante el ...
Celeste Samec, Hugo Yacobaccio
doaj   +1 more source

Vog: Using Volcanic Eruptions to Estimate the Health Costs of Particulates

open access: yesThe Economic Journal, EarlyView., 2018
The negative consequences of long‐term exposure to particulate pollution are well established but a number of studies find no effect of short‐term exposure on health outcomes. The high correlation of industrial pollutants complicates the estimation of the impact of individual pollutants on health.
Timothy J. Halliday   +2 more
wiley   +1 more source

Modelling GNSS-observed seasonal velocity changes of the Ross Ice Shelf, Antarctica, using the Ice-sheet and Sea-level System Model (ISSM) [PDF]

open access: yesThe Cryosphere
The flow speeds of floating ice shelves around the Antarctic Ice Sheet exhibit clear intra-annual variability. However, the drivers of this variability remain poorly understood.
F. Baldacchino   +12 more
doaj   +1 more source

Agrostis meyenii Trin. (Poaceae, Agrostidinae): first records from Peru, including taxonomic notes and an identification key [PDF]

open access: yesCheck List, 2020
The grass Agrostis meyenii Trin. (Poaceae, Agrostidinae) is newly recorded from Peru and is found in high-Andean puna grasslands of the departments of Ancash, Ayacucho, and Huánuco, marking the northernmost known limit of this species.
Steven P. Sylvester   +1 more
doaj   +3 more sources

The Egg Yolk Content in ω-3 and Conjugated Fatty Acids Can Be Sustainably Increased upon Long-Term Feeding of Laying Hens with a Diet Containing Flaxseeds and Pomegranate Seed Oil

open access: yesFoods, 2021
Long-term feeding trials examining the incorporation of conjugated linolenic acids (CLnA) into the diet of laying hens are lacking. In the present study, we compared two diets in sixty-six red Sex-Link hens (33 hens/treatment), fed for 26 weeks.
Monique T. Ngo Njembe   +9 more
doaj   +1 more source

Geología y Metalogenia de la Puna

open access: yesEstudios Geologicos, 1987
En este trabajo se puntualizan una serie de conceptos sobre las relaciones existentes entre evolución geológica y metalogénesis de la Puna. El análisis de la sedimentación, magmatismo y metamorfismo de la provincia geológica Puna, permite diferenciarla ...
R. N. Alonso, J. G. Viramonte
doaj   +1 more source

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