Exact(2)
If a generalist strategy involves the evolution of a general-purpose suite of genes that are necessary and sufficient to successfully parasitize a wide range of hosts, then such a trend could lead to a long-term stable generalist strategy.
Bat hummingbird pollination systems have been interpreted as transitions from ornithophily to chiropterophily (Buzato et al. 1994; Sazima et al. 1994) or as evolutionary stable generalist systems (Muchhala et al. 2009).
Similar(6)
The persistence of high concentration is not associated with the exit of smaller manufacturers, but instead a stable coexistence of generalist and specialist strategies emerges, in sharp contrast to the pattern observed in the, otherwise similar, jet engine industry.
The model exhibits evolutionary branching in a wide parameter range and the subsequent coevolution can lead to a stable coexistence of a generalist, settling in patches of any type, and a specialist that only immigrates into patches of high reward.
Increasers tended to be widespread species with generalist attributes, while stable or decreasing species were more likely to be specialists.
The model shows that intensive agriculture leads to non-forest and forest specialists decline, whereas forest generalists are kept stable.
The frequency of generalist species was either stable (Capsella bursa-pastoris, Lolium multiflorum, Poa annua, Taraxacum officinale) or increased (Lactuca serriola, Senecio vulgaris), while the frequency of specialist species fell (Arenaria serpyllifolia, Lithospermum arvense, Legousia speculum-veneris, Stachys arvensis).
This trend is mostly the result of a more pronounced decrease in the occurrence of specialist species, while during the same period intermediate and generalist species remained more often stable or even increased.
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