@article {ARC22512, title = {Changes in tundra pond limnology: Re-sampling Alaskan ponds after 40 years}, journal = {Ambio}, volume = {40}, year = {2011}, pages = {589-599}, isbn = {0044-7447 (Linking)}, doi = {10.1007/s13280-011-0165-1}, author = {V. L. Lougheed and M. G. Butler and D. C. Mcewen and John E. Hobbie} }