We seldom considered their biological profiles or whether they jibed well with the ecological limitations of a crowded planet.
"We're shaking loose viruses and dislodging them from their natural ecological limitations, places where they aren't very abundant and have competition, even within a single animal," Mr. Quammen said.
Our results suggest that site management can increase cottonwood and willow recruitment success from low-magnitude environmental flow events, an approach that can be applied in other portions of the Delta and to other human-impacted riparian systems across the world with similar ecological limitations.
However, to be regionally well-integrated, the capacity of a biogas plant has to be compatible with the agricultural and ecological limitations of its surroundings [109].
The inclusion of institutional variables in the form of International Council for Local Environmental Initiatives membership, ISO 14001 implementation, and non-profit sector activity addresses the ecological limitations of the often used IPAT (impact = population × affluence × technology) approach.
These institutional variables are included to address the ecological limitations of the original framework, and take the form of International Council for Local Environmental Initiatives (ICLEI) membership, International Standards Organization 14001 (ISO 14001) certification, and the number of non-profit organizations registered within a city's administrative borders.
China's ecological limitations -- water shortages, severely polluted water, soil pollution and the collapse of costal fisheries to name a few -- don't allow it the luxury of entertaining rhetoric like Stossel's.
However, the ecological limitations of the Burmese python are not known and the possible effects of global warming on the potential expansion of the species are also unclear.
Because of these many sources of error particularly the unknown position of the original ramet and the effects of ecological limitations on stand spread, which result in potentially significant and unknowable underestimates of clone age we stress that our estimates of age are not absolute, but represent a minimum age for the Jurupa clone.
If these maternal effects are in the form of parental manipulation, we should expect variation in female offspring to exceed that of male offspring, independent of resource and other ecological limitations.
