To gain more insight into the evolutionary development of orchid flowers and fruits, the orchid species Erycina pusilla was studied. The evolutionary origin of the median petaloid sepal, the callus on the labellum, and the stelidia was studied.

This thesis presents the systematics, epidermal defense, and bioprospecting of wild orchids.

Promotor: Prof.dr. E.F. Smets. Co-promotores: B. Gravendeel, F. Pupulin

This thesis describes the genetic and prokaryotic diversity of giant barrel sponges.

Promotor: E. Gittenberger, Co-promotor: B.W. Hoeksema

What impact does a mid-season wildfire have on grassland invertebrates?

Does a mid-season fire impact invertebrate populations?

Promotor: Prof.dr. E. Smets, M. Stech

In this thesis, I targeted the orchid genus Lepanthes, one of the six genera of angiosperms that surpasses 1,000 species in the Neotropics, as a study model to investigate the evolutionary processes that promoted species diversifications.

My PhD thesis investigates the ecological significance of resistance against drought-induced air bubble formation inside the water conduits of plants (embolism), and the plasticity and functional aspects of stem anatomical traits in woody and herbaceous species.

What is the effect of light at night on plant phenology and physiology, and how does this affect plant interactions with other species?

Does the presence of Ring-necked parakeets negatively influence feeding and feeding behaviour of native bird species on artificial bird feeders and if so, what are possible solutions?

Describe and identify what dosimetry parameters are of importance to interpret dose-response relationships (eg., mortality, sub-lethal, growth or reproduction inhabitation, DNA damage and reactive oxygen species, etc. ) for metal-based nanoparticles? How to develop quantitative models that enable to…

Promotor: Prof.dr. P.G.L Klinkhamer, Co-promotor: K. Vrieling

Promotores: Prof.dr. W.J.G.M. Peijnenburg & Dr. M.G. Vijver

Promotor: P.G.L. Klinkhamer, Co-Promotores: K. Vrieling, P.P.J. Mulder

How can we quantify the density of species within a community through environmental DNA concentrations?

Ethiopian wolves are endangered diurnal Afroalpine rodent hunters. I investigated the interaction between wolves, rodents and human land use in Borena Sayint National Park (BSNP), Abune Yosef and Aboi Gara in Ethiopia.

What invertebrates live in the fields and edges? Do the populations change with landscape complexity?

Freshwater is an important resource, but at a great risk of species decline due to habitat loss, pollution and over-exploitation, and invasive alien species.

Do selenium nanoparticles in fish food cause subtle alterations in behavior of fish: effect of particles size and concentration?

Promotores: G.A. Persoon, H.H. de Iongh

Does a high quality prairie restoration in an urban/agricultural landscape provide invertebrates necessary for a sustainable ecosystem?

Promotor: Prof.dr. G.R. de Snoo

Promotores: J.A.van Veen, P.L.G.Klinkhamer. Co-promotor: E.E.Kuramae

Plants produce an astonishing variety of secondary metabolites (SMs) which are thought to play vital roles in the fitness of plants through ecological interactions.

Promotores: W.J.G.M. Peijnenburg, G.R. de Snoo, Co-promotor: M.G. Vijver

Promotie

Promotie

Plants and their pollinators form complex interaction networks. Within these networks, species differ widely in the number of species they interact with.

Promotor: G.R. de Snoo, Co-promotor: H.H. de Iongh, C.J.M. Musters

Plant-microbe interaction resulted in different physio/chemical responses by host plant and interacting rhizobacteria.

Promotor: Prof.dr. P.C. van Welzen

What is vegetation structure and composition in SFM primary forest, secondary logged over forest (logging FSC certified and logging non certified) in comparison to primary forest? What is avian guild diversity in SFM primary forest, secondary logged over forest (logging FSC certified and logging non…

Trigonostemon Blume is a plant genus in the family Euphorbiaceae comprising 59 species.

The name ‘Jambi flora’ refers to fossil plants found as part of a rock formation from the Early Permian (296 million years old), located in the Jambi Province of Sumatra, Indonesia.

Hybrid zones occur where two species meet and produce offspring (hybrids). Typically, hybrids show a considerable reduction in fitness. In this thesis two hybrid zones are treated.

Multicellular giant algae Chara species have been widely used in physiological studies for decades.

Plant architecture has distinct forms in different plant species, but also within a species the finalarchitecture of a plant is determined by its gradual development and changes therein induced by environmental conditions during the plant’s life cycle.

What are the main factors associated with the stranding of the two seal species? What are the factors influencing the prevalence of disease in the two species? Which human-related factors influence the populations of the two seal species?

Plants and soils from natural ecosystems harbor great diversity of soil microorganisms, which could potentially contribute to the sustainability of horticulture. The knowledge about using wild plant species and soil from natural ecosystem to improve the crop health will advance the application of ecological…

Promotor: Carel J. ten Cate, Co-Promotor: Hans W. Slabbekoorn

Planets are formed in disks of gas and dust around young stars.

Promotores: H.A. Udo De Haes, P.M. Brakefield

Balsaminaceae is a diverse plant family characterized by a huge floral morphological diversity.