Spatial variation in vegetation and abiotic factors related to the occurrence of a ring-forming sedge
MetadataShow full item record
The clonal sedge Carex humilis forms rings of densely aggregated ramets in a dry grassland community in Central Europe. We describe the small-scale spatial variation, both in abiotic factors and vegetation, in relation to these rings. Compared to the surrounding vegetation the cover of plants,other than C. humilis, was significantly lower both in the central area of rings and within the rings themselves. The vegetation structure was also different. The soil was more fertile in the central area and within the ring than in the surroundings, measured both directly and by the abiotic response values of the vascular plants. We conclude that neither resource depletion nor competition from other plants were likely to be responsible for the low ramet density in the central area of C. humilis rings. Instead, we suggest that the ring formis caused either by the deposition of growth inhibiting substancesor by intrinsic morphological rules.
This item may be available from Professor Ladislav Mucina
Showing items related by title, author, creator and subject.
Miljkovic, Katarina; Lemelin, M.; Lucey, P. (2017)©2017. American Geophysical Union. Numerical modeling of the peak-ring basin formation showed that the peak-ring forms from the material that is part of the central uplift outwardly thrust over the inwardly collapsing ...
Neumann, G.; Zuber, M.; Wieczorek, M.; Head, J.; Baker, D.; Solomon, S.; Smith, D.; Lemoine, F.; Mazarico, E.; Sabaka, T.; Goossens, S.; Melosh, H.; Phillips, R.; Asmar, S.; Konopliv, A.; Williams, J.; Sori, M.; Soderblom, J.; Miljkovic, Katarina; Andrews-Hanna, J.; Nimmo, F.; Kiefer, W. (2015)Observations from the Gravity Recovery and Interior Laboratory (GRAIL) mission indicate a marked change in the gravitational signature of lunar impact structures at the morphological transition, with increasing diameter, ...
Morgan, J.; Gulick, S.; Bralower, T.; Chenot, E.; Christeson, G.; Claeys, P.; Cockell, C.; Collins, G.; Coolen, Marco; Ferrière, L.; Gebhardt, C.; Goto, K.; Jones, H.; Kring, D.; Le Ber, E.; Lofi, J.; Long, X.; Lowery, C.; Mellett, C.; Ocampo-Torres, R.; Osinski, G.; Perez-Cruz, L.; Pickersgill, A.; Poelchau, M.; Rae, A.; Rasmussen, C.; Rebolledo-Vieyra, M.; Riller, U.; Sato, H.; Schmitt, D.; Smit, J.; Tikoo, S.; Tomioka, N.; Urrutia-Fucugauchi, J.; Whalen, M.; Wittmann, A.; Yamaguchi, K.; Zylberman, W. (2016)Large impacts provide a mechanism for resurfacing planets through mixing near-surface rocks with deeper material. Central peaks are formed from the dynamic uplift of rocks during crater formation. As crater size increases, ...