000232830 001__ 232830
000232830 005__ 20181203024907.0
000232830 0247_ $$2doi$$a10.1111/oik.04330
000232830 022__ $$a0030-1299
000232830 02470 $$2ISI$$a000414120900004
000232830 037__ $$aARTICLE
000232830 245__ $$aDemographic stochasticity and resource autocorrelation control biological invasions in heterogeneous landscapes
000232830 260__ $$bWiley$$c2017$$aHoboken
000232830 269__ $$a2017
000232830 300__ $$a10
000232830 336__ $$aJournal Articles
000232830 520__ $$aMounting theoretical evidence suggests that demographic stochasticity, environmental heterogeneity and biased movement of organisms individually affect the dynamics of biological invasions and range expansions. Studies of species spread in heterogeneous landscapes have traditionally characterized invasion velocities as functions of the mean resource density throughout the landscape, thus neglecting higher-order moments of the spatial resource distribution. Here, we show theoretically that different spatial arrangements of resources lead to different spread velocities even if the mean resource density throughout the landscape is kept constant. Specifically, we find that increasing the resource autocorrelation length causes a reduction in the speed of species spread. The model shows that demographic stochasticity plays a key role in the slowdown, which is strengthened when individuals can actively move towards resources. We then experimentally corroborated the theoretically predicted reduction in propagation speed in microcosm experiments with the protist Euglena gracilis by comparing spread in landscapes with different resource autocorrelation lengths. Our work identifies the resource autocorrelation length as a key modulator and a simple measure of landscape susceptibility to biological invasions, which needs to be considered for predicting invasion dynamics within naturally heterogeneous environmental corridors.
000232830 700__ $$0245835$$g217715$$uEcole Polytech Fed Lausanne, Sch Architecture Civil & Environm Engn, Lab Ecohydrol, CH-1015 Lausanne, Switzerland$$aGiometto, Andrea
000232830 700__ $$uEawag, Swiss Fed Inst Aquat Sci & Technol, Dept Aquat Ecol, Dubendorf, Switzerland$$aAltermatt, Florian
000232830 700__ $$uEcole Polytech Fed Lausanne, Sch Architecture Civil & Environm Engn, Lab Ecohydrol, CH-1015 Lausanne, Switzerland$$aRinaldo, Andrea$$g182281$$0240022
000232830 773__ $$j126$$tOikos$$k11$$q1554-1563
000232830 909C0 $$xU10273$$0252014$$pECHO
000232830 909CO $$particle$$pENAC$$ooai:infoscience.tind.io:232830
000232830 917Z8 $$x182281
000232830 937__ $$aEPFL-ARTICLE-232830
000232830 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000232830 980__ $$aARTICLE