Long-term persistence of species and the SLOSS problem.

摘要: The single large or several small (SLOSS) problem has been addressed in a number of empirical and theoretical studies, but no coherent conclusion yet reached. Here I study the SLOSS context metapopulation dynamics. assume that there is fixed total amount A(0) habitat available, derive formulas for optimal n area A patches, where n=A(0)/A. consider optimality two ways. First, attempt to maximize time extinction, which relevant measure viability rare threatened species. Second, capacity patch network, corresponds both with maximizing distance deterministic extinction threshold fraction occupied patches. show typical case, patches maximizes capacity, while an intermediate extinction. main stemming from analysis largely affected by relationship between rates immigration, emigration local this summarized factor zeta, termed scaling factor.