Publications de Mariusz Lamentowicz

Assessing the responses of Sphagnum micro-eukaryotes to climate changes using high throughput sequencing

Alexandre Buttler, Enrique Lara, Edward Mitchell, Mariusz Lamentowicz, Vincent Eric Jules Jassey

Current projections suggest that climate warming will be accompanied by more frequent and severe drought events. Peatlands store ca. one third of the world's soil organic carbon. Warming and drought may cause peatlands to become carbon sources through stim ...

PEERJ INC2020

Dispersal limitations and historical factors determine the biogeography of specialized terrestrial protists

Enrique Lara, Edward Mitchell, Bertrand Fournier, Luca Bragazza, Mariusz Lamentowicz

Recent studies show that soil eukaryotic diversity is immense and dominated by micro-organisms. However, it is unclear to what extent the processes that shape the distribution of diversity in plants and animals also apply to micro-organisms. Major diversif ...

WILEY2019

Environmental and taxonomic controls of carbon and oxygen stable isotope composition in Sphagnum across broad climatic and geographic ranges

Luca Bragazza, Mariusz Lamentowicz, Bjorn Jozef Maria Robroek

Rain-fed peatlands are dominated by peat mosses (Sphagnum sp.), which for their growth depend on nutrients, water and CO2 uptake from the atmosphere. As the isotopic composition of carbon (C-12(,)13) and oxygen (O-16(,)18) of these Sphagnum mosses are affe ...

COPERNICUS GESELLSCHAFT MBH2018

Tipping point in plant-fungal interactions under severe drought causes abrupt rise in peatland ecosystem respiration

Alexandre Buttler, Enrique Lara, Edward Mitchell, Luca Bragazza, Pierre Rémi Mariotte, Mariusz Lamentowicz, Vincent Eric Jules Jassey, Bjorn Jozef Maria Robroek

2018

Predator-prey mass ratio drives microbial activity under dry conditions in Sphagnum peatlands

Alexandre Buttler, Edward Mitchell, Mariusz Lamentowicz, Vincent Eric Jules Jassey

2018

The Impact of Experimental Temperature and Water Level Manipulation on Carbon Dioxide Release in a Poor Fen in Northern Poland

Alexandre Buttler, Mariusz Lamentowicz, Vincent Eric Jules Jassey, Bjorn Jozef Maria Robroek

Springer Netherlands2018

Soil protistology rebooted: 30 fundamental questions to start with

Enrique Lara, Alexandre Jousset, Edward Mitchell, Thierry Jean Heger, Bertrand Fournier, Mariusz Lamentowicz, Santosh Kumar, Vincent Eric Jules Jassey

Protists are the most diverse eukaryotes. These microbes are keystone organisms of soil ecosystems and regulate essential processes of soil fertility such as nutrient cycling and plant growth. Despite this, protists have received little scientific attentio ...

Pergamon-Elsevier Science Ltd2017

Unveiling exceptional Baltic bog ecohydrology, autogenic succession and climate change during the last 2000 years in CE Europe using replicate cores, multi-proxy data and functional traits of testate amoebae

Mariusz Lamentowicz, Vincent Eric Jules Jassey

We present the results of high-resolution, multi-proxy palaeoecological investigations of two parallel peat cores from the Baltic raised bog Mechacz Wielki in NE Poland. We aim to evaluate the role of regional climate and autogenic processes of the raised ...

Pergamon-Elsevier Science Ltd2017

Genetic Determinism vs. Phenotypic Plasticity in Protist Morphology

Enrique Lara, Edward Mitchell, Mariusz Lamentowicz, Bjorn Jozef Maria Robroek

Untangling the relationships between morphology and phylogeny is key to building a reliable taxonomy, but is especially challenging for protists, where the existence of cryptic or pseudocryptic species makes finding relevant discriminant traits difficult. ...

Wiley2017

Freeze-thaw cycles simultaneously decrease peatland photosynthetic carbon uptake and ecosystem respiration

Alexandre Buttler, Mariusz Lamentowicz, Robert Thomas Edmund Mills, Constant Signarbieux, Vincent Eric Jules Jassey, Bjorn Jozef Maria Robroek, Maaike Louise Hofsommer

Decreasing snow cover in winter resulting from climate warming increases the incidence of freeze-thaw cycles (FTCs) in many ecosystems, including peatlands. As peatland ecosystems form a globally significant long-term carbon storage, understanding the effe ...

Finnish Environment Inst2017

Combining short-term manipulative experiments with long-term palaeoecological investigations at high resolution to assess the response of Sphagnum peatlands to drought, fire and warming

Alexandre Buttler, Mariusz Lamentowicz, Vincent Eric Jules Jassey

Northern hemisphere peatlands are substantial carbon stores. However, recent climate change and human impacts (e.g., drainage and atmospheric nutrient deposition) may trigger the emission of their stored carbon to the atmosphere. Biodiversity losses are al ...

Int Peat Soc2016

Loss of testate amoeba functional diversity with increasing frost intensity across a continental gradient reduces microbial activity in peatlands

Alexandre Buttler, Luca Bragazza, Mariusz Lamentowicz, Robert Thomas Edmund Mills, Constant Signarbieux, Vincent Eric Jules Jassey, Bjorn Jozef Maria Robroek, Maaike Louise Hofsommer

Soil microbial communities significantly contribute to global fluxes of nutrients and carbon. Their response to climate change, including winter warming, is expected to modify these processes through direct effects on microbial functions due to osmotic str ...

Elsevier2016

Anthropogenic- and natural sources of dust in peatland during the Anthropocene

Alexandre Buttler, Mariusz Lamentowicz, Vincent Eric Jules Jassey

As human impact have been increasing strongly over the last decades, it is crucial to distinguish human-induced dust sources from natural ones in order to define the boundary of a newly proposed epoch -the Anthropocene. Here, we track anthropogenic signatu ...

Nature Research2016

A novel testate amoebae trait-based approach to infer environmental disturbance in Sphagnum peatlands

Mariusz Lamentowicz, Vincent Eric Jules Jassey

Species' functional traits are closely related to ecosystem processes through evolutionary adaptation, and are thus directly connected to environmental changes. Species' traits are not commonly used in palaeoecology, even though they offer powerful advanta ...

Nature Research2016

Significance testing testate amoeba water table reconstructions

Edward Mitchell, Mariusz Lamentowicz, Vincent Eric Jules Jassey

Transfer functions are valuable tools in palaeoecology, but their output may not always be meaningful. A recently-developed statistical test ('randomTF') offers the potential to distinguish among reconstructions which are more likely to be useful, and thos ...

Pergamon-Elsevier Science Ltd2016

Hydrological dynamics and fire history of the last 1300 years in western Siberia reconstructed from a high-resolution, ombrotrophic peat archive

Alexandre Buttler, Mariusz Lamentowicz, Vincent Eric Jules Jassey

Siberian peatlands provide records of past changes in the continental climate of Eurasia. We analyzed a core from Mukhrino mire in western Siberia to reconstruct environmental change in this region over the last 1300 years. The pollen analysis revealed lit ...

Academic Press Inc Elsevier Science2015

Reconstructing climate change and ombrotrophic bog development during the last 4000 years in northern Poland using biotic proxies, stable isotopes and trait-based approach

Mariusz Lamentowicz, Vincent Eric Jules Jassey

In this study, we present a record spanning the last 4000 years from a Baltic bog (Kusowskie Bagno) in northern Poland. Using numerous biotic and abiotic proxies, such as testate amoebae (depth to water table reconstructions), stable carbon isotopes (C-13) ...

Elsevier2015

Plant functional diversity drives niche-size-structure of dominant microbial consumers along a poor to extremely rich fen gradient

Mariusz Lamentowicz, Vincent Eric Jules Jassey, Bjorn Jozef Maria Robroek

Plant community composition is recognized more and more for playing an important role in ecosystem processes, such as C cycling. In particular, plant functional type (PFT) composition seems to have a key regulatory role, yet the underlying mechanisms in ...

Wiley-Blackwell2014

Seasonal patterns of testate amoeba diversity, community structure and species-environment relationships in four Sphagnum-dominated peatlands along a 1300 m altitudinal gradient in Switzerland

Alexandre Buttler, Edward Mitchell, Luca Bragazza, Mariusz Lamentowicz, Vincent Eric Jules Jassey

Altitudinal gradients are useful to study the potential effects of climate change on ecosystems. Historically, studies on elevation gradients have primarily focused on macro-organisms and ecosystem processes, while microorganisms have been mostly ignored d ...

Pergamon-Elsevier Science Ltd2013

Holocene changes in climate and land use drove shifts in the diversity of testate amoebae in a subalpine pond

Mariusz Lamentowicz

Testate amoebae that inhabit peat are sensitive indicators of water table position. In this study, we used testate amoebae in sediments from a mire in the western Alps (Lac du Thyl) to: (1) reconstruct the hydrology of the site over the last 7,000 years, ( ...

Springer2013