Managing land-use effects on Northland dune lakes: lessons from the past

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dc.contributor.authorStephens, Ten_AU
dc.contributor.authorAugustinus, PCen_AU
dc.contributor.authorRip, Ben_AU
dc.contributor.authorGadd, PSen_AU
dc.contributor.authorZawadzki, Aen_AU
dc.date.accessioned2021-06-29T04:35:36Zen_AU
dc.date.available2021-06-29T04:35:36Zen_AU
dc.date.issued2018-02-02en_AU
dc.date.statistics2021-06-11en_AU
dc.description.abstractThe Northland region of New Zealand includes numerous high-value, macrophyte-dominated dune lakes. Recent water policy reforms offer limited guidance on managing for aquatic macrophytes. In addition, dune lake histories are poorly known as regular monitoring dates to 2005 AD. Here, ca. 4000 years of lake functional behaviour is reconstructed from sedimentary archives in two Northland dune lakes (Humuhumu and Rotokawau). Results demonstrated that macrophyte dominance is sensitive to catchment erosion and hydrological drawdown. Degradation of macrophyte communities occurred in the nineteenth and twentieth centuries, earlier at Lake Humuhumu than Lake Rotokawau (post-1880 AD and post-1930 AD, respectively). In both lakes, increased erosional influx reduced macrophyte productivity, before later increases to wider trophic state (post-1970 AD). Lake-level decline is linked to increased nutrient loading at Lake Rotokawau but less so, Lake Humuhumu which is more strongly groundwater-fed. In Northland dune lakes, water-level reduction and erosional influx from land use have driven macrophyte degradation. © 2018 Informa UK Limiteden_AU
dc.identifier.citationStephens, T., Augustinus, P., Rip, B., Gadd, P., & Zawadzki, A. (2018). Managing land-use effects on Northland dune lakes: lessons from the past. New Zealand Journal of Marine and Freshwater Research, 52(3), 409-429. doi:10.1080/00288330.2018.1430593en_AU
dc.identifier.issn1175-8805en_AU
dc.identifier.issue3en_AU
dc.identifier.journaltitleNew Zealand Journal of Marine and Freshwater Researchen_AU
dc.identifier.pagination409-429en_AU
dc.identifier.urihttps://doi.org/10.1080/00288330.2018.1430593en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10946en_AU
dc.identifier.volume52en_AU
dc.language.isoenen_AU
dc.publisherTaylor & Francisen_AU
dc.subjectLimnologyen_AU
dc.subjectWater qualityen_AU
dc.subjectHydrologyen_AU
dc.subjectLakesen_AU
dc.subjectSanden_AU
dc.subjectNutrientsen_AU
dc.subjectNew Zealanden_AU
dc.titleManaging land-use effects on Northland dune lakes: lessons from the pasten_AU
dc.typeJournal Articleen_AU
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