11 Works

Influences of the bark economics spectrum and positive termite feedback on bark and xylem decomposition

Bin Tuo, En-Rong Yan, Chao Guo, Hang Ci, Matty P. Berg & Johannes H. C. Cornelissen
The plant economics spectrum integrates trade-offs and covariation in resource economic traits of different plant organs and their consequences for pivotal ecosystem processes, such as decomposition. However, in this concept stems are often considered as one unit ignoring the important functional differences between wood (xylem) and bark. These differences may not only affect the performance of woody plants during their lifetime, but may also have important “afterlife effects”. Specifically, bark quality may strongly affect deadwood...

Unraveling Zechstein 3 Anhydrite Structuration and possible implications for Geo-Drilling Hazards

Ward Teertstra & Guido Hoetz
VU Amsterdam, Netherlands (1); EBN, Netherlands, The (2) Anhydrites Carbonates of the Leine formation, the third evaporitic cycle of the Zechstein group, are widely distributed in the Southern Permian basin. These strata are often drilled through by wells targeting underlying Rotliegend gas prospects. The ZEZ3C/A members constitute brittle rocks sandwiched by the ductile halites from the underlying ZEZ2H and the overlying ZEZ3H. The brittle sheet is frequently rifted (boudinage) and the resulting fragments are often...

Relation between seismic noise levels and soil fauna

Estefania Velilla
Human activities often impact the sensory environment of organisms. Wind energy turbines are a fast-growing potential source of anthropogenic vibrational noise that can affect soil animals sensitive to vibrations and thereby alter soil community functioning. Larger soil animals, such as earthworms (macrofauna, > 1 cm in size), are particularly likely to be impacted by the low-frequency turbine waves that can travel through soils over large distances. Here we examine the effect of wind turbine-induced vibrational...

Enhancing ecological integrity while preserving ecosystem services: constructing soft-sediment islands in a shallow lake

Casper Van Leeuwen, Ralph Temmink, Hui Jin, Yvonne Kahlert, Bjorn Robroek, Matty Berg, Leon Lamers, Marloes Van Den Akker, Roel Posthoorn, Annemiek Boosten, Han Olff &
1. Ecosystems are increasingly managed to provide multiple benefits to humans, which often degrades their ecological integrity. This strongly applies to aquatic ecosystems, in which engineering can enhance flood protection, drinking water supply, fisheries and recreation. Although these activities typically increase ecosystem functionality to humans, they often impair key aspects of biodiversity and natural functioning. 2. Classical restoration of such degrading freshwater ecosystems can lead to societal opposition, if returning to a former ecosystem state...

The validation of new phase-dependent gait stability measures: a modelling approach

Jian Jin, Dinant Kistemaker, Jaap Van Dieen, Andreas Daffertshofer & Sjoerd Bruijn
Identification of individuals at risk of falling is important when designing fall prevention methods. Current stability measures that estimate gait stability and robustness appear limited in predicting falls in older adults. Inspired by recent findings of phase-dependent local stability changes within a gait cycle, we used compass-walker models to test several phase-dependent stability metrics for their usefulness to predict gait robustness. These metrics are closely related to the often-employed maximum finite-time Lyapunov exponent and maximum...

Eco-evolutionary outsiders: establishing in a distantly related neighbourhood delays and reorganizes nutrient recycling

Xu Pan, Mathieu Santonja, Pierre-Emmanuel Courty, Olaf Butenschön, Matty Berg, Phil Murray, Benjamin Yguel, Daphnée Brulé & Andreas Prinzing
Rapid environmental change forces long-lived plants like trees to immigrate into zones still occupied by phylogenetically distantly related species. Does such phylogenetic isolation (PI) change the trees’ ecosystem functioning such as litter decomposition? We studied oaks (Quercus petraea) of low and high PI, reciprocally transplanting their litters to identify effect of aboveground litter quality and belowground decomposer biota. Across 8 and 14 months we quantified decomposition (mass loss, C-loss and N-loss), decomposer biota (Acari, Collembola,...

Data: How does external lateral stabilization constrain normal gait, apart from improving medio-lateral gait stability?

Mohammadreza Mahaki, Trienke IJmker, Han Han Houdijk & Sjoerd Bruijn
Background: The effect of external lateral stabilization on medio-lateral gait stability has been investigated previously. However, existing lateral stabilization devices not only constrains lateral motions, but also transverse and frontal pelvis rotations. This study aimed to investigate the effect of external lateral stabilization with and without constrained transverse pelvis rotation on mechanical and metabolic gait features. Methods: We undertook 2 experiments with eleven and ten young adult subjects, respectively. Kinematic, kinetic, and breath-by-breath oxygen consumption...

Networking the Yield Curve: Implications for Monetary Policy

Tatjana Dahlhaus, Julia Schaumburg & Tatevik Sekhposyan
"How do different monetary policies affect the yield curve and interact with each other? To answer this question, we introduce a novel network model for interest rate surprises of different maturities. We establish model properties and identification through simulation studies. Using the model, we implement different monetary policy scenarios: modelling simultaneous interventions in different segments of the bond market while varying the strength of forward guidance. We find that the overall effect on the yield...

Lack of lipid accumulation in two species of Chalcidoid wasps with secondarily evolved phytophagy

Jacintha Ellers
Stable co-evolutionary relationships between species can result in the loss of autonomous synthesis of essential nutrients when these can be obtained from the ecological partner. Parasitoid insects obtain the majority of their nutrients from their host, and contain multiple, independently-evolved lineages that do not increase their adult lipid reserves despite feeding on a surplus of dietary sugars, although some parasitoid species in these lineages were found to have reactivated adult lipogenesis. Several clades within the...

A deep dive into fat: Investigating blubber lipidomics fingerprint of killer whales and humpback whales in northern Norway

Pierre Bories, Audun Rikardsen, Pim Leonards, Aaron Fisk, Sabrina Tartu, Emma Vogel, Jenny Bytingsvik & Pierre Blevin
In cetaceans, blubber is the primary and largest lipid body reservoir. Our current understanding about lipid stores and uses in cetaceans is still limited and most studies only focused on a single narrow snapshot of the lipidome. We documented an extended lipidomics fingerprint in two cetacean species present in northern Norway during wintertime. We were able to detect 817 molecular lipid species in blubber of killer whales (Orcinus orca) and humpback whales (Megaptera novaeangliae). The...

Discordance between amyloid-β PET and CSF biomarkers: Clinical and pathophysiological consequences

Juhan Reimand

Registration Year

  • 2021
    11

Resource Types

  • Dataset
    8
  • Text
    3

Affiliations

  • VU University Amsterdam
    8
  • VU Amsterdam
    3
  • University of Groningen
    2
  • Centre d'Etudes Biologiques de Chizé
    1
  • The Arctic University of Norway
    1
  • Texas A&M University – Central Texas
    1
  • University of Rennes 1
    1
  • Netherlands Institute of Ecology
    1
  • University of Windsor
    1
  • European Business and Innovation Centre Network
    1