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Browsing EEB Papers - Robert Howarth by Issue Date
Now showing items 1-20 of 24
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Sulfur and carbon isotopes as tracers of salt-marsh organic matter flow
(Wiley, 1986-08-01)Stable isotopes of sulfur and carbon were used to trace the dominant flows of organic matter from producers to macroconsumers in Great Sippewissett Salt Marsh on Cape Cod. Spartina alterniflora and sulfur-oxidizing bacteria ... -
Inputs of sediment and carbon to an estuarine ecosystem: Influence of land use
(Wiley, 1991-02-01)Estuaries and coastal marine ecosystems receive large inputs of nutrients, organic carbon, and sediments from non—point—source runoff from terrestrial ecosystems. In the tidal, freshwater Hudson River estuary, such inputs ... -
Human alteration of the global nitrogen cycle: Causes and consequences
(Wiley, 1997-08-01)Nitrogen is a key element controlling the species composition, diversity, dynamics, and functioning of many terrestrial, freshwater, and marine ecosystems. Many of the original plant species living in these ecosystems are ... -
Nonpoint pollution of surface waters with phosphorus and nitrogen
(Wiley, 1998-08-01)Agriculture and urban activities are major sources of phosphorus and nitrogen to aquatic ecosystems. Atmospheric deposition further contributes as a source of N. These nonpoint inputs of nutrients are difficult to measure ... -
Global patterns of terrestrial biological nitrogen (N2) fixation in natural systems
(Wiley, 1999-06-01)Human activities have clearly caused dramatic alterations of the terrestrial nitrogen cycle, and analyses of the extent and effects of such changes are now common in the scientific literature. However, any attempt to ... -
Effects of varying salinity on phytoplankton growth in a low-salinity coastal pond under two nutrient conditions
(University of Chicago Press, 2002-10)Human activities have clearly caused dramatic alterations of the terrestrial nitrogen cycle, and analyses of the extent and effects of such changes are now common in the scientific literature. However, any attempt to ... -
Nutrient limitation of phytoplankton growth in Vineyard Sound and Oyster Pond, Falmouth, Massachusetts
(University of Chicago Press, 2002-10)Intensive agriculture represents a recent extension of green roof technology. Perceived ecosystem services provided by rooftop farming include stormwater management and the production of affordable and nutritious vegetables ... -
Human health effects of a changing global nitrogen cycle
(Wiley, 2003-06-01)Changes to the global nitrogen cycle affect human health well beyond the associated benefits of increased food production. Many intensively fertilized crops become animal feed, helping to create disparities in world food ... -
Riverine nitrogen export from the continents to the coasts
(Wiley, 2006-03-02)We present an overview of riverine nitrogen flux calculations that were prepared for the International Nitrogen Initiative's current global assessment of nitrogen cycles: past, present, and future (Galloway et al., 2004). ... -
Coastal marine eutrophication: Control of both nitrogen and phosphorus is necessary
(PNAS, 2008-12-09)Human activities have clearly caused dramatic alterations of the terrestrial nitrogen cycle, and analyses of the extent and effects of such changes are now common in the scientific literature. However, any attempt to ... -
Linking environmental nutrient enrichment and disease emergence in humans and wildlife
(Wiley, 2010-01-10)Worldwide increases in human and wildlife diseases have challenged ecologists to understand how large-scale environmental changes affect host-parasite interactions. One of the most profound changes to Earth's ecosystems ... -
Coupled biogeochemical cycles: eutrophication and hypoxia in temperate estuaries and coastal marine ecosystems
(Wiley, 2011-02-01)Nutrient fluxes to coastal areas have risen in recent decades, leading to widespread hypoxia and other ecological damage, particularly from nitrogen (N). Several factors make N more limiting in estuaries and coastal waters ... -
The role of technology and policy in mitigating regional nitrogen pollution
(Institute of Physics Publishing, 2011-03-01)Human activity greatly influences nitrogen (N) pollution in urbanized and adjacent areas. We comprehensively studied the N cycling in an urban-rural complex system, the Greater Hangzhou Area (GHA) in southeastern China. ... -
Benthic macroinvertebrate functional diversity regulates nutrient and algal dynamics in a shallow estuary
(Inter-Research Science Publishing, 2011-03-28)Proliferation of macroalgal blooms is regulated by grazing pressure and nutrient availability, which may be mediated directly by benthic macroinvertebrates or indirectly through feedback mechanisms. Using invertebrates ... -
Nitrogen fluxes from large watershed to coastal ecosystems controlled by net anthropogenic nitrogen inputs and climate
(Wiley, 2011-07-15)The flux of nitrogen (N) to coastal marine ecosystems is strongly correlated with the net anthropogenic nitrogen inputs (NANI) to the landscape across 154 watersheds, ranging in size from 16 km 2 to 279 000 km 2, in the ... -
Toward a better understanding and quantification of methane emissions from shale gas development
(National Academy of Sciences, 2014-04-29)The identification and quantification of methane emissions from natural gas production has become increasingly important owing to the increase in the natural gas component of the energy sector. An instrumented aircraft ... -
A bridge to nowhere: Methane emissions and the greenhouse gas footprint of natural gas
(Wiley, 2014-05-14)In April 2011, we published the first peer-reviewed analysis of the greenhouse gas footprint (GHG) of shale gas, concluding that the climate impact of shale gas may be worse than that of other fossil fuels such as coal and ... -
Estimating net anthropogenic nitrogen inputs (NANI) in the Lake Dianchi basin of China
(Copernicus, 2014-08-28)Net anthropogenic nitrogen inputs (NANI) with components of atmospheric N deposition, synthetic N fertilizer, agricultural N fixation and N in net food and feed imports from 15 catchments in the Lake Dianchi basin were ... -
Anthropogenic point-source and non-point-source nitrogen inputs into Huai River basin and their impacts on riverine ammonia–nitrogen flux
(Copernicus, 2015-07-22)This study provides a new approach to estimate both anthropogenic non-point-source and point-source nitrogen (N) inputs to the landscape, and determines their impacts on riverine ammonia-nitrogen (AN) flux, providing a ... -
Greenhouse gas emissions from domestic hot water: heat pumps compared to most commonly used systems
(Wiley, 2016-01-25)We estimate the emissions of the two most important greenhouse gasses (GHG), carbon dioxide (CO2) and methane (CH4), from the use of modern high-efficiency heat pump water heaters compared to the most commonly used domestic ...
