期刊
WETLANDS
卷 40, 期 6, 页码 2585-2595出版社
SPRINGER
DOI: 10.1007/s13157-020-01359-5
关键词
Metsulfuron; Microfauna; Wetlands; Salix; Grey willow; Zooplankton
资金
- Genesis Energy Committee
- Twharetoa Maori Trust Board Scholarship
- Motukawa Farm Trust Education Grant
- Tumate Mahuta Memorial Scholarship
- Te Runanga o Ngai Te Rangi Iwi Trust Tertiary Education Grant
- Tauwhao Te Ngare Trust Tertiary Education Grant
- Poripori Farm A Trust Tertiary Education Grant
- Rose Hellaby Postgraduate Scholarship
- Golden Plover Wetland Research Award
- Tongariro Natural History Society Award
Few studies have examined zooplankton assemblages associated with grey willow (Salix cinerea) invasions in wetlands. Our aim was to quantitatively examine zooplankton composition amongS. cinereastands within the South Taupo Wetland, New Zealand, to determine whether these assemblages are affected by willow growth and willow control treatment using the herbicide metsulfuron (C14H15N5O6S). Alternatively, we examined whether wetland hydrology had an over-riding influence. Sampling was performed on three occasions (late-summer, mid-winter, and early-summer). Using Multidimensional Scaling and ANOSIM, we found no significant differences in zooplankton composition or environmental variables among native vegetation, live and deadS. cinereasites, except for a difference in willow canopy density between late summer and winter. However, zooplankton composition differed on either side of a sand bar, suggesting areas separated by this barrier functioned independently. Overall, we found zooplankton communities to be regulated more by wetland hydrology than by willow presence. A limited willow effect was possibly due to the wetland being at an early stage of invasion, representing stand-alone individuals, with a continuous canopy not yet having formed. Alternatively, willows have lesser effects on invertebrates in wetlands than in streams. Ground control treatment ofS. cinereausing metsulfuron had no apparent impact.
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