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Purdue Agriculture Help the Hellbender
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Everyone can do something to Help the Hellbender. On this website, you will find information about the hellbender, as well as household and farm management practices that can help keep our rivers and streams clean. People who fish and kayak can also learn what they should do if they see a hellbender in the wild.
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Online Training Resources
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Training Resources
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A Prophet Of Soil Gets His Moment Of Fame
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More than 40 years ago, in Nigeria, a young scientist named Rattan Lal encountered an idea that changed his life — and led, eventually, to global recognition and a worldwide movement to protect the planet's soil.
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News & Announcements
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WLFW News Inbox
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Ep. 89 Pheasants Forever And Precision Ag
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Ep. 89 Pheasants Forever and Precision Ag Pheasants Forever + Agriculture might not be the first combination you think of, but their similarities are far greater than one might expect. Tanner Bruce, Ag and Conservation Programs Manager at Pheasants Forever, joins podcast host Tony Kramer to talk conservation, precision farming, and the new partnership with Pheasants Forever and John Deere.
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Resources
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Podcasts
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Native grasses win performance tests
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More than one study shows good gains and low costs from native forages.
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News & Events
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Ag a perfect place to 'do science' (Editorial)
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Using agriculture as a venue for science aligns perfectly with the “do science” mentality. The hands-on action-oriented learning in real-life conditions tricks young students into learning by stimulating their senses and curiosity. It exposes them to so many scientific realms that they often learn they like something they never knew about.
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News & Events
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Interior, Agriculture & Defense Team Up To Conserve Landscapes and Wildlife, Bolster Rural Economies, and Ensure Military Readiness
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The Departments of Interior, Agriculture and Defense joined with state and federal partners today to announce the designation of three new Sentinel Landscapes to benefit working lands, wildlife conservation and military readiness.
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News & Events
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Significant anthropogenic-induced changes of climate classes since 1950
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Anthropogenic forcings have contributed to global and regional warming in the last few decades and likely affected terrestrial precipitation. Here we examine changes in major Köppen climate classes from gridded observed data and their uncertainties due to internal climate variability using control simulations from Coupled Model Intercomparison Project 5 (CMIP5). About 5.7% of the global total land area has shifted toward warmer and drier climate types from 1950–2010, and significant changes include expansion of arid and high-latitude continental climate zones, shrinkage in polar and midlatitude continental climates, poleward shifts in temperate, continental and polar climates, and increasing average elevation of tropical and polar climates. Using CMIP5 multi-model averaged historical simulations forced by observed anthropogenic and natural, or natural only, forcing components, we find that these changes of climate types since 1950 cannot be explained as natural variations but are driven by anthropogenic factors.
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Resources
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Climate Science Documents
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Global non-linear effect of temperature on economic production
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Growing evidence demonstrates that climatic conditions can have a profound impact on the functioning of modern human societies (1,2), but effects on economic activity appear inconsistent. Fundamental productive elements of modern economies, such as workers and crops, exhibit highly non-linear responses to local temperature even in wealthy countries (3,4). In contrast, aggregate macroeconomic productivity of entire wealthy countries is reported not to respond to temperature (5), while poor countries respond only linearly (5,6). Resolving this conflict between micro and macro observations is critical to understanding the role of wealth in coupled human–natural systems (7,8) and to anticipating the global impact of climate change (9,10). Here we unify these seemingly contradictory results by accounting for non-linearity at the macro scale. We show that overall economic productivity is non- linear in temperature for all countries, with productivity peaking at an annual average temperature of 13 6C and declining strongly at higher temperatures. The relationship is globally generalizable, unchanged since 1960, and apparent for agricultural and non-agricultural activity in both rich and poor countries. These results provide the first evidence that economic activity in all regions is coupled to the global climate and establish a new empirical foundation for modelling economic loss in response to climate change (11,12), with important implications. If future adaptation mimics past adaptation, unmitigated warming is expected to reshape the global economy by reducing average global incomes roughly 23% by 2100 and widening global income inequality, relative to scenarios without climate change. In contrast to prior estimates, expected global losses are approximately linear in global mean temperature, with median losses many times larger than leading models indicate.
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Resources
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Climate Science Documents
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Worldwide evidence of a unimodal relationship between productivity and plant species richness
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The search for predictions of species diversity across environmental gradients has challenged ecologists for decades. The humped-back model (HBM) suggests that plant diversity peaks at intermediate productivity; at low productivity few species can tolerate the environmental stresses, and at high productivity a few highly competitive species dominate. Over time the HBM has become increasingly controversial, and recent studies claim to have refuted it. Here, by using data from coordinated surveys conducted throughout grasslands worldwide and comprising a wide range of site productivities, we provide evidence in support of the HBM pattern at both global and regional extents. The relationships described here provide a foundation for further research into the local, landscape, and historical factors that maintain biodiversity.
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Resources
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Climate Science Documents
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Increasing Northern Hemisphere water deficit
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A monthly water-balance model is used with CRUTS3.1 gridded monthly precip- itation and potential evapotranspiration (PET) data to examine changes in global water deficit (PET minus actual evapotranspiration) for the Northern Hemisphere (NH) for the years 1905 through 2009. Results show that NH deficit increased dramatically near the year 2000 during both the cool (October through March) and warm (April through September) seasons. The increase in water deficit near 2000 coincides with a substantial increase in NH temperature and PET. The most pronounced increases in deficit occurred for the latitudinal band from 0 to 40°N. These results indicate that global warming has increased the water deficit in the NH and that the increase since 2000 is unprecedented for the 1905 through 2009 period. Additionally, coincident with the increase in deficit near 2000, mean NH runoff also increased due to increases in P. We explain the apparent contradiction of concurrent increases in deficit and increases in runoff.
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Resources
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Climate Science Documents
