First Limnological Characterization of Crater Lake Billy Mitchell (Bougainville Island, Papua New Guinea)

Schabetsberger, Robert; Sichrowsky, Ursula; Scheck, Alexander; Schagerl, Michael; Mähnert, Barbara; Sonntag, Bettina; Pall, Karin

doi:10.2984/71.1.3

Cited by 4 publications

(4 citation statements)

References 48 publications

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“…The limnology of the Billy Mitchell lake was studied in 2015 (Schabetsberger et al, 2017). The water column (maximum 88 m depth) had a near constant temperature (~25°C), constant, neutral pH and no accumulation of CO 2 at depth.…”

Section: Connections To Local Volcanoes?mentioning

confidence: 99%

Persistent growth of a young andesite lava cone: Bagana volcano, Papua New Guinea

Wadge

McCormick

Edmonds

et al. 2018

Journal of Volcanology and Geothermal Research

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Bagana, an andesite lava cone on Bougainville Island, Papua New Guinea, is thought to be a very young central volcano. We have tested this idea by estimating the volumes of lava extruded over different time intervals (1-, 2-, 3-, 9-, 15-, 70-years) using digital elevation models (DEMs), mainly created from satellite data. Our results show that the long-term extrusion rate at Bagana, measured over years to decades, has remained at about 1.0 m 3 s -1 . We present models of the total edifice volume, and show that, if our measured extrusion rates are representative, the volcano could have been built in only ~300 years. It could also possibly have been built at a slower rate during a longer, earlier period of growth. Six kilometres NNW of Bagana, an andesite-dacite volcano, Billy Mitchell, had a large, caldera-forming plinian eruption 437 years ago. We consider the possibility that, as a result of this eruption, the magma supply was diverted from Billy Mitchell to Bagana. It seems that Bagana is a rare example of a very youthful, polygenetic, andesite volcano. The characteristics of such a volcano, based on the example of Bagana, are: a preponderance of lava products over pyroclastic products, a high rate of lava extrusion maintained for decades, a very high rate of SO 2 emission, evidence of magma batch fractionation and location in a trans-tensional setting at the end of an arc segment above a very steeply dipping and rapidly converging subduction zone 2

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Section: Connections To Local Volcanoes?mentioning

confidence: 99%

Persistent growth of a young andesite lava cone: Bagana volcano, Papua New Guinea

Wadge

McCormick

Edmonds

et al. 2018

Journal of Volcanology and Geothermal Research

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“…8A). Not surprisingly, Coleps is often observed in nutrient-and ion-rich and also oxygen-depleted freshwater habitats or areas, e.g., sulfurous and crater lakes 1,5,6,27,55,56 or even in the sludge of wastewater treatment plants 57 . Mixotrophic individuals of Coleps were mainly found in the upper layers of both lakes, whereas in Lake Mondsee we could also detect specimens down to 40 m depth (Fig.…”

Section: Ecology and Distributionmentioning

confidence: 99%

“…In freshwater habitats such as lakes and ponds, four colepid species can be frequently found even within the same water body [1][2][3][4][23][24][25][26][27] , i.e., C. hirtus hirtus, C. hirtus viridis, C. spetai and Nolandia nolandi Kahl, 1930 (= formerly C. nolandi). The morphology of these species is very similar except for the structure of the tier plates, i.e., the pretzel-shaped hirtus-type in the three former and the reniform nolandi-type in the latter species 12,16 ( Fig.…”

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confidence: 99%

An integrative approach sheds new light onto the systematics and ecology of the widespread ciliate genus Coleps (Ciliophora, Prostomatea)

Pröschold

Rieser

Darienko

et al. 2021

Sci Rep

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Species of the genus Coleps are one of the most common planktonic ciliates in lake ecosystems. The study aimed to identify the phenotypic plasticity and genetic variability of different Coleps isolates from various water bodies and from culture collections. We used an integrative approach to study the strains by (i) cultivation in a suitable culture medium, (ii) screening of the morphological variability including the presence/absence of algal endosymbionts of living cells by light microscopy, (iii) sequencing of the SSU and ITS rDNA including secondary structures, (iv) assessment of their seasonal and spatial occurrence in two lakes over a one-year cycle both from morphospecies counts and high-throughput sequencing (HTS), and, (v) proof of the co-occurrence of Coleps and their endosymbiotic algae from HTS-based network analyses in the two lakes. The Coleps strains showed a high phenotypic plasticity and low genetic variability. The algal endosymbiont in all studied strains was Micractinium conductrix and the mutualistic relationship turned out as facultative. Coleps is common in both lakes over the whole year in different depths and HTS has revealed that only one genotype respectively one species, C. viridis, was present in both lakes despite the different lifestyles (mixotrophic with green algal endosymbionts or heterotrophic without algae). Our results suggest a future revision of the species concept of the genus Coleps.

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“…However, just as there have been identified inconsistencies in the assumption of P limitation among temperate lakes (Dzialowski et al, 2005; Scott et al, 2019, among others), the expectation of N limitation in tropical lakes has been refuted in the literature. Despite a lack of evidence for any relationship between latitude and dominant nutrient limitation (Abell et al, 2012; Elser et al, 2007; Huszar et al, 2006), recent and diverse studies continue to reference the N limitation paradigm, suggesting its sustained influence across different fields (e.g., da Silva et al, 2021; Farrell et al, 2020; Goshu et al, 2020; Nankabirwa et al, 2019; Pantoja‐Agreda & Otero‐Morales, 2017; Schabetsberger et al, 2017; Sim et al, 2021; Tran et al, 2021; Zieritz et al, 2019, among others). This persistence of the N limitation paradigm is, in part, a byproduct of the inherent challenges of definitively measuring phytoplankton nutrient limitation in natural environments combined with a paucity of tropical inland water research (Riveros‐Iregui et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen is unlikely to consistently limit primary productivity in most tropical lakes

Fadum

Hall

2023

Ecosphere

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Despite mounting evidence that tropical lakes may experience an array of phytoplankton nutrient limitation regimes, references to low‐latitude lakes being predominantly nitrogen limited remain common in the literature. To assess the current understanding of nutrient limitation regimes in tropical lakes, we performed a literature review with the following objectives: First, quantify and summarize observations of nitrogen (N), phosphorus (P), and colimitation in the collected studies. Second, identify common drivers of tropical nutrient limitation regimes. Third, provide literature‐informed recommendations for future research efforts into nutrient limitation of tropical lakes. We report that not only is N not the dominant limiting nutrient in the reviewed lakes, but tropical lakes exhibit a wide range of nutrient limitation regimes, and there is often considerable heterogeneity of the dominant limiting nutrient within an individual lake. This heterogeneity is driven largely by seasonal patterns of water column stratification and precipitation, land use and land cover (LULC), and the interaction of these system characteristics with lake morphology. To accurately characterize nutrient limitation in tropical aquatic ecosystems, assessments need to include sampling across space and time in order to capture within‐lake spatial heterogeneity and both inter‐ and intra‐annual temporal variation. Whenever possible, both inferential and experimental approaches should be used in concert to determine nutrient limitation due to methodological limitations.

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First Limnological Characterization of Crater Lake Billy Mitchell (Bougainville Island, Papua New Guinea)

Cited by 4 publications

References 48 publications

Persistent growth of a young andesite lava cone: Bagana volcano, Papua New Guinea

Persistent growth of a young andesite lava cone: Bagana volcano, Papua New Guinea

An integrative approach sheds new light onto the systematics and ecology of the widespread ciliate genus Coleps (Ciliophora, Prostomatea)

Nitrogen is unlikely to consistently limit primary productivity in most tropical lakes

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