Search Results - "Brettum, Pål"

The Impact of Nutrient State and Lake Depth on Top-Down Control in the Pelagic Zone of Lakes: A Study of 466 Lakes from the Temperate Zone to the Arctic by Jeppesen, Erik, Jensen, Jens Peder, Jensen, Claus, Faafeng, Bjørn, Hessen, Dag O., Søndergaard, Martin, Lauridsen, Torben, Brettum, Pål, Christoffersen, Kirsten

“…Using empirical data from 466 temperate to arctic lakes covering a total phosphorus (TP) gradient of$2-1036\ \mu {\rm g}\ {\rm L}^{-1}$, we describe how the…”
Get full text

Diversity Predicts Stability and Resource Use Efficiency in Natural Phytoplankton Communities by Ptacnik, Robert, Solimini, Angelo G., Andersen, Tom, Tamminen, Timo, Brettum, Pål, Lepistö, Liisa, Willén, Eva, Rekolainen, Seppo

“…The relationship between species diversity and ecosystem functioning has been debated for decades, especially in relation to the "macroscopic" realm (higher…”
Get full text

Nutrient Enrichment and Planktonic Biomass Ratios in Lakes by Hessen, D.O, Faafeng, B.A, Brettum, P, Andersen, T

“…Phosphorus (P) to chlorophyll ratios and zoo-plankton-phytoplankton (Z:P) biomass ratios were assessed in 400 temperate lakes over a gradient of phosphorus (P)…”
Get full text

Regional species pools control community saturation in lake phytoplankton by Ptacnik, Robert, Andersen, Tom, Brettum, Pål, Lepistö, Liisa, Willén, Eva

“…Recent research has highlighted that positive biodiversity–ecosystem functioning relationships hold for all groups of organisms, including microbes. Yet, we…”
Get full text

A compendium of cell and natural unit biovolumes for >1200 freshwater phytoplankton species by Kremer, Colin T., Gillette, Jacob P., Rudstam, Lars G., Brettum, Pål, Ptacnik, Robert

“…Cell size determination is a critical part of sampling phytoplankton communities, as size is both a fundamental trait determining species' ecological niches…”
Get full text

Performance of a new phytoplankton composition metric along a eutrophication gradient in Nordic lakes by Ptacnik, Robert, Solimini, Angelo G, Brettum, Pål

“…A new phytoplankton metric is presented, which is developed from a large dataset of Norwegian lakes (>2,000 samples from >400 lakes). In contrast to previous…”
Get full text

Changes in the volume and composition of phytoplankton after experimental acidification of a humic lake by Brettum, Pål

“…In connection with the HUMEX project carried out in Lake Skjervatjern, near Førde, in the western part of Norway, the effects of the experimental acidification…”
Get full text

Phytoplankton dynamics and cyanobacterial dominance in Murchison Bay of Lake Victoria (Uganda) in relation to environmental conditions by Haande, Sigrid, Rohrlack, Thomas, Semyalo, Ronald P., Brettum, Pål, Edvardsen, Bente, Lyche-Solheim, Anne, Sørensen, Kai, Larsson, Petter

“…Murchison Bay is a shallow embayment in the north-western part of Lake Victoria, strongly influenced by urban pollution from the Ugandan capital Kampala. Two…”
Get full text

How water exchange and seasonality affect the eutrophication of Murchison Bay, Lake Victoria by Luyiga, Suzan, Haande, Sigrid, Semyalo, Ronald P., Kizito, Yusuf S., Miyingo-Kezimbira, Anne, Brettum, Pål, Solheim, Anne Lyche, Odong, Robinson, Asio, Santa Maria, Jensen, Knut Helge, Larsson, Petter

“…Murchison Bay in the Northern part of Lake Victoria has for decades received a daily wastewater load of 0.2% of its volume from Kampala City, through the…”
Get full text

Phytoplankton Contribution to Sestonic Mass and Elemental Ratios in Lakes: Implications for Zooplankton Nutrition by Hessen, Dag O., Andersen, Tom, Brettum, Pål, Faafeng, Bjørn A.

“…Phytoplankton carbon and particulate organic carbon (POC), nitrogen (PON), and phosphorus (POP) (POC:PON:POP) were analyzed in 109 temperate lakes covering a…”
Get full text

A compendium of cell and natural unit biovolumes for >1200 freshwater phytoplankton species: Ecological Archives E095‐257 by Kremer, Colin T., Gillette, Jacob P., Rudstam, Lars G., Brettum, Pål, Ptacnik, Robert

“…Cell size determination is a critical part of sampling phytoplankton communities, as size is both a fundamental trait determining species' ecological niches…”
Get full text

Autotroph :herbivore biomass ratios; carbon deficits judged from plankton data by HESSEN, Dag O, FAAFENG, Bjørn A, BRETTUM, Pal

“…Issue Title: Recent Developments in Fundamental and Applied Plankton Research A survey on phytoplankton:zooplankton biomass ratios was performed in 342…”
Get full text

The phytoplankton of Lake Atnsjøen, Norway – a long-term investigation by Brettum, Pål, Halvorsen, Gunnar

“…Issue Title: The Atna River: Studies in an Alpine-Boreal Watershed Quantitative samples were collected from Lake Atnsjøen five times per year in the growth…”
Get full text

Performance of a new phytoplankton composition metric along a eutrophication gradient in Nordic lakes: Assessment of the Ecological Status of European Surface Waters by PTACNIK, Robert, SOLIMINI, Angelo G, BRETTUM, Pal

Get full text

The phytoplankton of Lake Atnsjøen, Norway: a long-term investigation: The Atna River: studies in an alpine-boreal watershed by BRETTUM, Pal, HALVORSEN, Gunnar

Get full text

The River Bjerkreim in SW Norway - Successful Chemical and Biological Recovery after Liming by Walseng, Bjørn, Langåker, Roy M, Brandrud, Tor E, Brettum, Pål, Fjellheim, Arne, Hesthagen, Trygve, Kaste, Øyvind, Larsen, Bjørn M, Lindstrøm, Eli-a

“…On a large scale, the acidified River Bjerkreim, southwestern Norway, has been treated with lime since the autumn 1996. During the Atlantic salmon (Salmon…”
Get full text

Phytoplankton and pelagic primary productivity in Ovre Heimdalsvatn by Tangen, K, Brettum, P

“…A phytoplankton investigation was carried out in the subalpine, low-productive Norwegian lake Øvre Heimdalsvatn in 1969-70 and 1972. This paper describes the…”
Get full text

Periphytic and drifting microalgae in a tributary stream of Ovre Heimdalsvatn by Tangen, K, Muller, C, Brettum, P

“…Samples of drifting and periphytic microalgae were collected during 1972 from a fast-flowing, stony stream (Brurskardsbekken) in the Jotunheimen mountain area,…”
Get full text

annotated check-list of microalgae from Ovre Heimdalsvatn and its tributaries by Tangen, K, Haworth, E.Y, Brettum, P, Muller, C

“…About one hundred genera with more than 300 species have been identified in water samples, net haul material, periphyton samples from artificial substrate, and…”
Get full text