caa a22 4500 467904294 CHVBK 20180406152829.0 cr unu---uuuuu 170328e20060301xx s 000 0 eng 10.1007/s10661-006-4938-0 doi (NATIONALLICENCE)springer-10.1007/s10661-006-4938-0 Multiscale Spatial and Small-Scale Temporal Variation in the Composition of Riverine Fish Communities [Elektronische Daten] [Ivor Growns, Karen Astles, Peter Gehrke] We studied the multiscale (sites, river reaches and rivers) and short-term temporal (monthly) variability in a freshwater fish assemblage. We found that small-scale spatial variation and short-term temporal variability significantly influenced fish community structure in the Macquarie and Namoi Rivers. However, larger scale spatial differences between rivers were the largest source of variation in the data. The interaction between temporal change and spatial variation in fish community structure, whilst statistically significant, was smaller than the variation between rivers. This suggests that although the fish communities within each river changed between sampling occasions, the underlying differences between rivers were maintained. In contrast, the strongest interaction between temporal and spatial effects occurred at the smallest spatial scale, at the level of individual sites. This means whilst the composition of the fish assemblage at a given site may fluctuate, the magnitude of these changes is unlikely to affect larger scale differences between reaches within rivers or between rivers. These results suggest that sampling at any time within a single season will be sufficient to show spatial differences that occur over large spatial scales, such as comparisons between rivers or between biogeographical regions. Springer Science + Business Media, Inc., 2006 freshwater fish nationallicence sampling design nationallicence monitoring nationallicence Murray Darling Basin nationallicence Growns Ivor NSW Fisheries Office of Conservation, Nelson Bay, Private Bag 1, 2315, NSW, Australia aut Astles Karen NSW Fisheries Office of Conservation, Nelson Bay, Private Bag 1, 2315, NSW, Australia aut Gehrke Peter NSW Fisheries Office of Conservation, Nelson Bay, Private Bag 1, 2315, NSW, Australia aut Environmental Monitoring and Assessment Springer Netherlands 114/1-3(2006-03-01), 553-571 0167-6369 114:1-3<553 2006 114 10661 https://doi.org/10.1007/s10661-006-4938-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-006-4938-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Growns Ivor NSW Fisheries Office of Conservation, Nelson Bay, Private Bag 1, 2315, NSW, Australia aut NATIONALLICENCE 700 1- Astles Karen NSW Fisheries Office of Conservation, Nelson Bay, Private Bag 1, 2315, NSW, Australia aut NATIONALLICENCE 700 1- Gehrke Peter NSW Fisheries Office of Conservation, Nelson Bay, Private Bag 1, 2315, NSW, Australia aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Springer Netherlands 114/1-3(2006-03-01), 553-571 0167-6369 114:1-3<553 2006 114 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer