J. H. Willems

Challenges for the conservation of calcareous grasslands in northwestern Europe: integrating the requirements of flora and fauna

Michiel F. WallisDeVries, Peter Poschlod, J. H. Willems · Biological Conservation · 2002 · 545 citations

Life Sciences, Biodiversity Conservation, Ecology +14

Seed size, shape and vertical distribution in the soil: indicators of seed longevity

Renée M. Bekker, Jan P. Bakker, Ulf Grandin et al. · Functional Ecology · 1998 · 536 citations

Agriculture, Plant Sciences, Soil Sciences +16

Why do we need permanent plots in the study of long‐term vegetation dynamics?

Jan P. Bakker, Han Olff, J. H. Willems et al. · Journal of Vegetation Science · 1996 · 357 citations · Full text

Natural Resources, Conservation Biology, Ecology +16

Increasing dominance of Brachypodium pinnatum (L.) beauv. in chalk grasslands: A threat to a species-rich ecosystem

Roland Bobbink, J. H. Willems · Biological Conservation · 1987 · 286 citations

Life Sciences, Ecology, Plant Sciences +7

Changes in chalk‐grassland structure and species richness resulting from selective nutrient additions

J. H. Willems, Robert K. Peet, L. Bik · Journal of Vegetation Science · 1993 · 248 citations

Life Sciences, Ecology, Soil Sciences +13