The soil-dwelling, filamentous bacteria of the genus Streptomyces are renowned for their production of useful secondary metabolites including antibiotics. The work described in this thesis provides new insights on the role and regulation of antibiotic production and resistance in these bacteria.

Birds sing to be heard, but how do they cope with increasing noise levels? Which species persist in cities and why? And do they thrive or suffer in the urban soundscape?

This thesis pioneers diatom molecular identification and quantification through genome-scale methods, with four key aims: (i) reviewing DNA/RNA sequencing methods in aquatic biomonitoring to highlight their strengths and limitations;

Negotiation can only really be an alternative to warfare, if the parties agree on a framework of rules and procedures. And if the confidence of the partners may increase in another. But negotiations continue to wage war by peaceful means.

Filamentous Actinobacteria, such as Streptomyces, produce a plethora of chemically diverse bioactive metabolites that have found applications across medicine, agriculture and biotechnology.

Do understudied animals contain hidden species?

We study the link between the acoustic, behavioral and physiological health of birds and prominent pollution factors. We aim to explore causation through experimental studies on detrimental factors like traffic noise, particulate matter and chemical toxins. Our primary target is scientific progress…

Microbial Sciences' contribution to the Evolution & Biodiversity research theme focuses on understanding how bacteria sense and respond to their environment, and how bacterial diversity and evolution is influenced by cooperative and antagonistic interactions taking place between microbes.

Promotors: Prof.dr. G.R. de Snoo, Prof.dr. H. Leirs (Univ. Antwerpen), Co-promotor: H.H. de Iongh

Lecture, Global Questions Seminar

An interdisciplinary and innovative research group combining History, underwater archaeology, GIS and wood provenancing methods.

Even embryos can become embroiled in an evolutionary arms race with another species. Leiden biologists demonstrate this with larvae of the rosy bitterling that parasitize the gills of freshwater mussels. They published their research on February 19 in PNAS.

Animal Sciences’ contributions to the Evolution & Biodiversity research theme include evo-devo research, the evolution of cognitive and behavioural traits, and the evolutionary mechanisms of stress adaptation. This research involves both indoor and outdoor studies.

Evolution & Biodiversity is one of the four research themes of the Institute of Biology Leiden.

The research programme Industrial Ecology aims to support the ecological transformation of society and environment towards sustainability. The research subject is Industrial Ecology in its broadest definition, covering environmental systems analysis, and incorporating the social and economic aspects…

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

How did toxin genes evolve from harmless physiological genes?

The HARVEST project explores the dietary choices that our hominin ancestors and relatives made, by recovering information on what they consumed, and how factors like environmental variation, intrinsic biology, and development of food processing technologies could have influenced their decisions.

Promotor: E. Gittenberger, Co-promotores: L.P. van Ofwegen; B.W. Hoeksema

What is the population size/structure and distribution of tiger and leopard inside the Bardia National Park (BNP) compared with the population outside? What is the movement and home range and conflict pattern in time and space of tigers and leopards inside the BNP compared with outside? What constitutes…

The mycorrhizal symbiosis is among the most widespread species interactions on Earth⁠. This thesis focuses on orchid mycorrhiza, a unique mycorrhizal type that has caught scientists’ attention for centuries⁠.

The Institute of Biology Leiden (IBL) is an internationally oriented institute for research and education in biology. We are part of the Faculty of Science at Leiden University.

The Great Rift Valley in Africa is a real treasure trove for discovering early human fossils. The fossils found in this part of Africa have determined our view of human evolution. But was the Great Rift Valley really the place where evolution took place or just a place where fossils are well preserved…

Galaxies in the local Universe fall into two main categories of spirals and ellipticals. In this Thesis, we explore the structural evolution of galaxies into this bimodal distribution.

We are developing the conceptual framework, which is new to this taxonomic group, and evaluate the current state of the art with respect to all critical parameters and transfer functions for a fully developed Population Consequences of Acoustic Disturbance (PCAD) model.

Despite the field’s general agreement that pyrotechnology had a significant impact on the cultural evolution of humankind, our understanding of the origins and development of fire use and its role in humankind’s cultural evolution is very limited, blurred by strong disagreements over its chronology…

Plant Sciences' contribution to the Evolution & Biodiversity research theme is to understand what are the key drivers of plant biodiversity during evolution with a focus on plant life history and resilience traits and develop tools to restore and maintain plant biodiversity.

The Leiden University Shii Studies Initiative (LUSSI) is hosting a two-day online conference on Islam and Evolution.

This multidisciplinary minor provides students with knowledge on how and why humans became the way they are. The minor focuses on the evolution of the species Homo sapiens from other hominin lineages and animal ancestors, and on the various factors shaping this process. Not only is human evolution of…

As part of the NEXUS1492 project, this project will use ancient DNA techniques to shed new light on the demographic and health history of the Caribbean and the impact of European colonization on indigenous communities in the region.

Are you thinking about studying Industrial Ecology? Learn more and watch the introduction video.

I think we should go this way. This way! THIS! WAY!! Making yourself heard in a city can be difficult. That is not only the case for humans, but birds seem to be hindered by urban noise as well. Researcher Hans Slabbekoorn of Leiden University already showed that great tits in Leiden communicate differently…

Promotor: Prof.dr. M. Schilthuizen

What are the phylogenetic relationships among the members of speciation bursts?

In this course, you will develop an understanding of evolutionary processes and their formative power. You will see how evolution has shaped biodiversity, and continuously influences our daily life.

Promotor: Prof. dr. Arnold Tukker & Prof. dr. René Kemp (Maastricht University)

Studies in Human Evolution is a series of the Faculty of Archaeology, Leiden University and The Max Planck Institute for Evolutionary Anthropology, Leipzig.

The master’s programme Industrial Ecology at Leiden University is an emerging scientific discipline that takes a systemic approach to environmental problems. The master in Industrial Ecology is a co-operation between Leiden University and Delft University of Technology.

The master's programme Industrial Ecology (joint degree Leiden University and Delft University of Technology) is unique in the Netherlands and one of the few programmes in the world combining natural science, engineering, and social science for science-based solutions for sustainability problems.

The master specialisations Industrial Ecology and Mathematics ranked highest among the master specialisations in Leiden.

Why do plants produces always produced so many slightly differing metabolites within a particular chemical class?

The thesis is about the study of shell evolution of the Hydrocenidae of the genus Georissa. This thesis started with a general overview on the evolutionary process of animals due to ecological changes.

Industrial Ecology is an emerging scientific discipline that takes a systemic approach to sustainability problems. An interdisciplinary approach, integrating an engineering, environmental and social science perspective is essential for sustainable development. The Master in Industrial Ecology is a co-operation…

Industrial Ecology is an emerging scientific discipline that takes a systemic approach to sustainability problems. An interdisciplinary approach, integrating an engineering, environmental and social science perspective is essential for sustainable development. The Master in Industrial Ecology is a co-operation…

Institute of Environmental Sciences, Faculty of Science, Leiden University

How has early development in R. ocellatus been modified as a result of its parasitic embryonic lifestyle?

A study by a Leiden-Wageningen group shows that present-day humans are biologically poorly equipped to deal with the toxins they are regularly exposed to in smoky environments: compared to earlier hominins, we modern humans are probably even worse off. The study appeared in Molecular Biology and Evolution.…

How do humans, non-humans and their interactions and relations shape the home as ecological and social space?

The mission of the Plant Science research programme is to contribute to the sustainable production of high quality crops, flowers and high-value bio-based products. This is realised by generating fundamental knowledge of basic biological processes related to development of plants and their interaction…