caa a22 4500 445894628 CHVBK 20180317145627.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10750-010-0580-5 doi (NATIONALLICENCE)springer-10.1007/s10750-010-0580-5 Influences of catchment and corridor imperviousness on urban stream macroinvertebrate communities at multiple spatial scales [Elektronische Daten] [Kevin Collier, Bryan Clements] Resolving land cover hierarchy relationships in urban settings is important for defining the scale and type of management required to enhance stream health. We investigated associations between macroinvertebrate assemblages in urban streams of Hamilton, New Zealand, and environmental variables measured at multiple spatial scales comprising (i) local-scale physicochemical conditions, (ii) impervious area in multiple stream corridor widths (30, 50 and 100m) along segments (sections of stream between tributary nodes) and for entire upstream networks, and (iii) total impervious area in stream segment sub-catchments and upstream catchments. Imperviousness was higher for stream segment sub-catchments than for entire catchments because of the agricultural headwaters of some urban streams. Imperviousness declined as corridor width declined at both segment and catchment scales reflecting the vegetated cover along most urban stream gullies. Upstream catchment imperviousness was strongly and inversely correlated with dissolved organic carbon concentration, whereas segment and upstream corridor scales were correlated with water temperature and pH. Corridor imperviousness appeared to be a stronger predictor than catchment imperviousness of Ephemeroptera, Plecoptera and Trichoptera taxa richness and the Quantitative Urban Community Index specifically developed to assess impacts of urbanisation. In contrast, imperviousness at all measured scales added only marginal improvement in assemblage-based models over that provided by the local-scale physicochemical variables of reach width, habitat quality, macrophyte cover, pH and dissolved oxygen concentration. These findings infer variable scales of influence affecting macroinvertebrate communities in urban streams and suggest that it may be important to consider local and corridor factors when determining mechanisms of urbanisation impacts and potential management options. Springer Science+Business Media B.V., 2010 Stormwater nationallicence Riparian nationallicence Impervious area nationallicence Urbanisation nationallicence New Zealand nationallicence Collier Kevin Environment Waikato, PO Box 4010, Hamilton, New Zealand aut Clements Bryan Environment Waikato, PO Box 4010, Hamilton, New Zealand aut Hydrobiologia Springer Netherlands 664/1(2011-04-01), 35-50 0018-8158 664:1<35 2011 664 10750 https://doi.org/10.1007/s10750-010-0580-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-010-0580-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Collier Kevin Environment Waikato, PO Box 4010, Hamilton, New Zealand aut NATIONALLICENCE 700 1- Clements Bryan Environment Waikato, PO Box 4010, Hamilton, New Zealand aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 664/1(2011-04-01), 35-50 0018-8158 664:1<35 2011 664 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer