Demography gone wild in native species: four reasons to avoid the term "native invaders"
Summary: Native invaders are species that become ``invasive'' in their own native range to the point of becoming a nuisance. This demographic disregulation presents management challenges, but we question the usefulness of this term on four grounds: it adds nothing to a well-known management problem, can bias the perception of management options, neglects different causes underlying the disregulation of native and non-indigenous species, and excludes species that can become antropogenically disregulated.
Reproductive ecology of buzz-pollinated Ouratea spectabilis trees (Ochnaceae) in Brazilian Cerrados
Summary: Ouratea spectabilis is a tree in the Brazilian savannas, or cerrados. Only a few specialized insects can produce the specific vibrations to liberate their pollen, in what is known as "buzz pollination". It is self-incompatible, and self-pollination reduced fertility to the level of interspecific crosses with co-generic species. Pollen viability was high, but in spite of pollen supplementation seed-to-ovule ratios were never over 30%, likely because of environmental stress.
Drought resistance of native pioneer species indicates potential suitability for restoration of post-mining areas
Summary: In order to test whether invasive exotic species, predominantly used for restoring post-mining areas in north-eastern Vietnam, may be replaced by ecologically superior native pioneer species, we conducted a drought stress experiment in a greenhouse. Our results indicate with respect to drought resistance that native pioneer species are a potential alternative to exotic species for the ecological restoration of subtropical post-mining areas, which may accelerate secondary succession.
N. Winkler, W. Weymann, H. Auge, S. Klotz, P. Finkenbein, and H. Heilmeier Web Ecol., 14, 65-74, 2014 AbstractFull Article (PDF, 643 KB)
09 Jan 2015
Comment on "Opinion paper: Forest management and biodiversity": the role of protected areas is greater than the sum of its number of species
Summary: Clear-fellings to introduce heterogeneity can be an important component of a forest management plan. However, it is misleading to compare clear-fellings to protected areas dominated by old-growth forests using a simplistic measure of biodiversity and without a landscape perspective. To minimize the well-documented role of protected areas can have adverse effects on forested landscapes, primary forest remnants, and taxa that rely on forest structural elements characteristic of old-growth forests.