Kurt, Halil İbrahimEkici, Mustafa2026-02-032026-02-0320252149-1402https://doi.org/10.53570/jnt.1700338https://search.trdizin.gov.tr/tr/yayin/detay/1325923https://hdl.handle.net/20.500.12428/34018This paper investigates the population dynamics of solutions to a parabolic-parabolic-elliptic type of multi-species Keller-Segel chemotaxis system under the Neumann boundary conditions in a smoothly bounded domain. It studies dynamical properties such as $L^\\rho$-bounds, global existence, global boundedness, and combined mass persistence of solutions for the aforementioned system. Under certain specified parameter conditions, the paper shows that the system admits a unique global classical solution that remains uniformly bounded from above. Furthermore, it establishes that the entire population persists at all times; in other words, this study proves that any globally bounded classical solution maintains a positive lower mass bound.eninfo:eu-repo/semantics/openAccessChemotaxisglobal existenceKeller-Segel systemglobal boundednessmass persistenceArticle51769110.53570/jnt.17003381325923