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We introduce a novel gradient-based damping term into a Keller-Segel typetaxis model with motivation from ecology and consider the following systemequipped with homogeneous Neumann-boundary conditions: \begin{equation}\begin{cases} u_t= \Delta u - \chi \nabla \cdot (u \nabla v)+a u^\alpha-bu^\beta-c|\nabla u|^\gamma,\\ \tau v_t=\Delta v-v+u .\\ \end{cases}\end{equation} The problem is formulated in a bounded and smooth domain$\Omega$ of $\mathbb{R}^N$, with $N\geq 2$, for some positive numbers$a,b,c,\chi>0$, $\tau \in \{0,1\}$, $\gamma\geq 1$, $\beta>\alpha\geq 1$. Asfar as we know, Keller-Segel models with gradient-dependent sources are new inthe literature and, accordingly, beyond giving a reasonable ecologicalinterpretation the objective of the paper is twofold:  1.) to provide a rigorous analysis concerning the local existence andexensibility criterion for a class of models generalizing the above problem,obtained by replacing $a u^\alpha-b u^\beta-c|\nabla u|^\gamma$ with$f(u)-g(\nabla u)$;  2.) to establish sufficient conditions on the data of the problem itself,such that it admits a unique classical solution $(u,v)$, for $T_{max}=\infty$and with both $u$ and $v$ bounded.  We handle 1.) whenever appropriately regular initial distributions$u(x,0)=u_0(x)\geq 0$, $\tau v(x,0)=\tau v_0(x)\geq 0$ are considered and $f$and $g$ obey some regularity properties and, moreover, some growthrestrictions. Further, as to 2.), for the same initial data considered in theprevious case, global boundedness of solutions is proven for any $\tau\in\{0,1\}$, provided that $\frac{2N}{N+1}<\gamma\leq 2$.

A Keller-Segel type taxis model with ecological interpretation and boundedness due to gradient nonlinearities