On the other hand, spatial and cultural proximity have a complementary relationship, conducive to the formation of a dense resource of networks (Hsu and Saxenian 2000).
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As populations increase, cities become denser, resources diminish, and economies sober, architects will need to confront new methods of space making.
Therefore, although dense floral resources may attract mutualist pollinators, the accompanying dense floral and fruit resources may simultaneously attract antagonist herbivores and seed predators, creating conflicting selective pressures (Louda and Potvin 1995; Strauss and Irwin 2004; Ågren et al. 2008).
In this way, a dense alternative resource can induce evolutionary suicide (sensu Dieckmann and Ferrière 2004) when a less dense alternative resource would be a weaker attractor and would allow the mutualism to persist.
Similarly, companies in a dense and resource-rich environment (notably cognitive), which can generate significant savings and, above all, have a positive influence on the growth of young companies.
The observed widespread catabolism of lipid reserves by females likely is caused by a decrease in the availability of energy-dense food resources for scaup (e.g., amphipods) on spring stopover areas in the upper Midwest.
While a dense alternative resource with a wide temporal distribution can make a mutualism more robust to climate change, a dense alternative resource with a narrow temporal distribution can make a mutualism less robust (Figs 3C,F and 4: lower right in each panel).
Second, the presence of a dense alternative resource with a wide temporal distribution can subsidize the focal pollinator population as it evolves, preventing the mutualism from crossing its Allee threshold.
