Patterns of Vegetation and Climatic Conditions Derived from Satellite Images Relevant for Sub-Antarctic Rangeland Management

Villa, Madeleyne; Opazo, Sergio; Moraga, Claudio; Muñoz-Arriagada, René; Radic, Sergio

doi:10.1016/j.rama.2020.03.004

Cited by 3 publications

(5 citation statements)

References 44 publications

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“…The increase in minimum temperatures, winter precipitation, and the number of maximum wind speed events during spring, have led to several impacts on the grassland growth cycle and in consequence strongly affect the sheep production in the MR. Although some works speculate on possible beneficial effects of warming trends in areas traditionally affected by cold stress [17] our results indicate that the projections must consider the local characteristics in every case. Depending on the position of the management area in the MR environmental gradient, these effects must be positive or negative.…”

Section: Sheep Production Climate and Aboveground Net Primary Productivity (Anpp)mentioning

confidence: 74%

“…SEA results showed significant effects on ANPP and SP derived from stressed conditions associated with EE. ANPP for example is negatively affected by extreme rainfall-provoked flooding and frosting under extreme low minimum temperature as is shown also by recent work [17]. They studied the relationship between snow cover and NDVI for Tierra del Fuego, found out that strong snowfall may have a year-long effect on vegetation, prolonging the dormancy period.…”

Section: Extreme Weather Events Net Primary Productivity and Sheep Productionmentioning

confidence: 76%

“…In general, sheep production in Patagonia is being affected by climate change mainly through the effects of the aforementioned trends on the aboveground net primary productivity (ANPP) of the Patagonian ecosystems [15]. Seasonality is another factor connected with the maximum values of grasslands productivity for the spring-summer months from September to April [16,17]. Land-use mitigation and adaptation strategies of this important economic sector, based on regional-scale approaches, may help to use the forage resources in a more sustainable way [18].…”

Section: Introductionmentioning

confidence: 99%

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Impact of Extreme Weather Events on Aboveground Net Primary Productivity and Sheep Production in the Magellan Region, Southernmost Chilean Patagonia

et al. 2020

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Spatio-temporal patterns of climatic variability have effects on the environmental conditions of a given land territory and consequently determine the evolution of its productive activities. One of the most direct ways to evaluate this relationship is to measure the condition of the vegetation cover and land-use information. In southernmost South America there is a limited number of long-term studies on these matters, an incomplete network of weather stations and almost no database on ecosystems productivity. In the present work, we characterized the climate variability of the Magellan Region, southernmost Chilean Patagonia, for the last 34 years, studying key variables associated with one of its main economic sectors, sheep production, and evaluating the effect of extreme weather events on ecosystem productivity and sheep production. Our results show a marked multi-decadal character of the climatic variables, with a trend to more arid conditions for the last 8 years, together with an increase in the frequency of extreme weather events. Significant percentages of aboveground net primary productivity (ANPP) variance is explained by high precipitation, mesic temperatures, and low evapotranspiration. These conditions are, however, spatially distributed in the transition zone between deciduous forests and steppe and do not represent a general pattern for the entire region. Strong precipitation and wind velocity negatively affect lamb survival, while temperature and ANPP are positively correlated. The impact of extreme weather events on ANP and sheep production (SP) was in most of the cases significantly negative, with the exception of maximum temperature that correlated with an increase of ANPP, and droughts that showed a non-significant negative trend in ANPP. The examination of these relationships is urgent under the current scenario of climate change with the acceleration of the environmental trends here detected.

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Section: Sheep Production Climate and Aboveground Net Primary Productivity (Anpp)mentioning

confidence: 74%

Section: Extreme Weather Events Net Primary Productivity and Sheep Productionmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

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Impact of Extreme Weather Events on Aboveground Net Primary Productivity and Sheep Production in the Magellan Region, Southernmost Chilean Patagonia

et al. 2020

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“…The grazing year is split in two periods, with summer grazing from December to May in wetlands or sites with altitudes of 150 m above sea level or greater. Winter grazing occurs from May to December in lower altitude sites with a more favorable temperature range during the coldest months [17,22]. Winter grazing generally overlaps with lactation and postpartum periods [22,23].…”

Section: Continuous Grazing Systemmentioning

confidence: 99%

“…Winter grazing occurs from May to December in lower altitude sites with a more favorable temperature range during the coldest months [17,22]. Winter grazing generally overlaps with lactation and postpartum periods [22,23].…”

Section: Continuous Grazing Systemmentioning

confidence: 99%

Magallanes Sheep Farming

Radic-Schilling¹,

Sales²,

Lira³

et al. 2022

Sheep Farming - Herds Husbandry, Management System, Reproduction and Improvement of Animal Health

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The Magallanes region in Chilean Patagonia encompasses 13 million hectares with approximately 3.6 million used for agricultural and livestock systems. This portion is located to the east of the Andean Mountain chain in the rain shadow zone, with annual precipitation increasing along an east to west gradient from 200 to almost 1,000 mm. To fully describe sheep farming in the Magallanes region, many topics need to be addressed, including sheep production and management, existing vegetative communities, livestock-wildlife interactions, and economic diversification into agritourism and another sheep industry products. All these give shape to the story of the development of sheep farming in Magallanes, which is important at the regional and national level. Three key points are identified that together can lead to a successful future for the industry: sustainable management, human resources and the market.

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Steppe Ecosystems in Chilean Patagonia: Distribution, Climate, Biodiversity, and Threats to Their Sustainable Management

Radic-Schilling,

Corti,

Muñoz-Arriagada

et al. 2023

Integrated Science

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Patterns of Vegetation and Climatic Conditions Derived from Satellite Images Relevant for Sub-Antarctic Rangeland Management

Cited by 3 publications

References 44 publications

Impact of Extreme Weather Events on Aboveground Net Primary Productivity and Sheep Production in the Magellan Region, Southernmost Chilean Patagonia

Impact of Extreme Weather Events on Aboveground Net Primary Productivity and Sheep Production in the Magellan Region, Southernmost Chilean Patagonia

Magallanes Sheep Farming

Steppe Ecosystems in Chilean Patagonia: Distribution, Climate, Biodiversity, and Threats to Their Sustainable Management

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