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dc.contributor.authorKpodonu, Alfred Theodore NK
dc.contributor.authorHamilton, David P
dc.contributor.authorLusk, Christopher H
dc.contributor.authorHartland, Adam
dc.contributor.authorLaughlin, Daniel C
dc.contributor.authorVerburg, Piet
dc.description.abstractThis study examined long-term stability in water quality of Lake Okataina, North Island, New Zealand, inferred from sediments deposited from 1836 to 2009, during which time there was a pyroclastic volcanic eruption (Tarawera 1886) and successive introductions of invasive mammals. Multiple geochemical proxies were analysed stratigraphically for organic matter loading, primary productivity, redox potential and phosphorus retention capacity. Organic matter loading to the lake is mostly authochthonous (algae) although there was increased allochthonous (terrestrial) loading immediately after the Tarawera eruption. After 1920, there was a sustained increase in inorganic erosion flux. Primary productivity appeared to increase considerably about 1960, but has remained relatively unchanged more recently. Our results suggest that the lake could recover from the impact of the volcanic eruption within a few decades, but the introduction of mammals may affect its resilience and lead to more pervasive impacts on the biogeochemistry.
dc.publisherTaylor & Francis
dc.relation.ispartofjournalNew Zealand Journal of Marine and Freshwater Research
dc.subject.fieldofresearchEarth Sciences
dc.subject.fieldofresearchEnvironmental Sciences
dc.subject.fieldofresearchBiological Sciences
dc.subject.keywordsScience & Technology
dc.subject.keywordsLife Sciences & Biomedicine
dc.subject.keywordsPhysical Sciences
dc.subject.keywordsMarine & Freshwater Biology
dc.titleLong-term changes in the water quality of a deep temperate oligotrophic lake in response to catchment disturbance: evidence from sediment cores
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationKpodonu, ATNK; Hamilton, DP; Lusk, CH; Hartland, A; Laughlin, DC; Verburg, P, Long-term changes in the water quality of a deep temperate oligotrophic lake in response to catchment disturbance: evidence from sediment cores, New Zealand Journal of Marine and Freshwater Research, 2019, 53 (4), pp. 571-587
gro.hasfulltextNo Full Text
gro.griffith.authorHamilton, David P.

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