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Nematodes under a microscope, courtesy ofsnickclunk/flickr. |
Studying nematodes — or roundworms — communities in these soils can provide insight into the stages of ecosystem development as the worms respond differently to vegetative changes from grasslands to forested areas, a recent study from the Chinese Academy of Sciences found. The types of nematodes found in soil can also give insights about soil health, the authors found.
Though they may not look very impressive, nematodes are complex creatures. More than 25,000 species have been identified and have been known to adapt to a large variety of environments — from terrestrial to watery ecosystems, from salty to fresh habitats, and from northern to southern longitudes.
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Collecting samples in glacier forelands (source:LTERNET) |
The researchers found that while all these changes were occurring above ground, dynamic changes were also occurring beneath the surface. As the soils first developed, levels of soil phosphorous increased, and fungi-eating nematodes were dominant. In later stages, these nematodes were replaced with bacteria-eating nematodes; this shift is likely a response to the improvement of soil quality.
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Hailuogou Glacier, courtesy ofMykle Hoban/Flickr. |
"Further research should be conducted to determine the most efficient approach to integrate plant succession, nutrient availability, and soil bacterial and invertebrate community dynamics into models of ecosystem development and succession," the researchers concluded. "These models would be helpful for prediction and management of nutrient limitation during long-term soil development." It will be interesting to see whether the patterns of changing nematode populations in the glacier forelands in China are similar to those in other areas. It will also be of importance to framing climate change policy, since the expansion of vegetation in areas formerly covered by glaciers has the potential to sequester carbon dioxide. (Glacier Hub)
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