If, post-1720, minerals are washing in due to increased rates of bridge reconstruction (etc.), and organic goo is settling due to
increasing eutrophication (etc.)... what's the putative relationship to climate signals?
Not exact matches
1.6 %: estimated proportion of marine fish species (for which trend data exist) with
increasing populations, due to improved conditions including better fishing management and decreased
eutrophication
Over the past 50 years, changes in land use and wastewater inputs have led to
eutrophication of the lake, with
increased turbidity and oxygen depletion in deeper waters.
Therefore, we expect that the biomass accumulation of S. japonica may well
increase under future scenarios of ocean acidification and
eutrophication.
However, if one considers the enormous
increase of reactive nitrogen in our biosphere, due to the use of synthesized fertilizer and the burning of fossil fuels, its impact is not part of the analysis, even tough this
increase shows up in the
eutrophication (nutrient enrichment) of open waters all over the world, resulting in excess algae, in some areas causing large algae blooms (as where they are going to hold the sailing regattas during the Olympics), red tides and dead zone, as the 8000 square mile dead zone in the Gulf of Mexico.
In addition to
increasing the quantity of organic carbon and reducing the availability of oxygen,
eutrophication may also affect the overall quality of organic matter for fueling CH4 - producing archaea.
A comparison of CO2 and CH4 fluxes from eutrophic reservoirs suggests that
eutrophication does little to change the net carbon balance of reservoirs, but greatly
increases the atmospheric radiative forcing caused by these systems through the stimulation of CH4 production (figure 3).
At the same time,
eutrophication may promote larger CH4 emissions, both by reducing O2 concentrations in reservoir bottom waters and by
increasing organic matter quantity (as described below).
Furthermore, it appears that reservoir nutrient loading and associated
eutrophication leads to
increased radiative forcing by reservoirs because of
increased CH4 emissions.
Increasing temperature, nutrient fluctuations, and human - induced
eutrophication may support the development of harmful algal blooms in coastal areas.
In southern Europe, to compensate for
increased climate - related risks (lowering of the water table, salinisation,
eutrophication, species loss)(Williams, 2001; Zalidas et al., 2002), a lessening of the overall human burden on water resources is needed.
Ecological surprises include rapid and abrupt changes in temperature and precipitation, leading to an
increase in extreme events such as floods, fires and landslides,
increases in
eutrophication, invasion by alien species, or rapid and sudden
increases in disease (Carpenter et al., 2005).
On the other hand, organic
eutrophication (without fertilizers) does tend to cause an
increase in respiration,
increasing the carbon dioxide concentration and lowering the pH again.
A very shallow lake, its has suffered from
eutrophication that has continued for decades, due to
increased nutrient load from farming and other human activities.
The effects of
eutrophication on carbonate chemistry can exceed that of OA from anthropogenic CO2 by either
increasing pH, when enhanced CO2 uptake by primary producers prevails (Borges and Gypens 2010), or by decreasing pH, where enhanced respiratory CO2 release prevails (Cai et al. 2011), a condition often associated with coastal hypoxia (Feely et al. 2010).
Although
eutrophication is the major concern related to these inputs, the pH of coastal waters is also influenced through the enhanced CO2 uptake from primary production and CO2 release from respiration associated with
increased nutrient inputs.
Here's a quick video on
eutrophication from SUNY via WRI: Follow Jaymi on Twitter for more stories like this More on Dead Zones Dead Pigs: Scientists» Latest Tool in Understanding Ocean Dead Zones Everest Death Zone (Video News) First - Ever Animals Found Living Without Oxygen in Marine Dead Zone BP Oil Spill Causing More Gulf Dead Zones as Methane Levels
Increase