@article{ScharfBurkart2021,
  author    = {Scharf, Uwe and Burkart, Michael},
  title     = {Sansevieria pfennigii (Ruscaceae, Asparagales)},
  series = {Phytotaxa : a rapid international journal for accelerating the publication of botanical taxonomy},
  volume    = {483},
  journal   = {Phytotaxa : a rapid international journal for accelerating the publication of botanical taxonomy},
  number    = {1},
  publisher = {Magnolia Press},
  address   = {Auckland},
  issn      = {1179-3155},
  doi       = {10.11646/phytotaxa.483.1.1},
  pages     = {1 -- 8},
  year      = {2021},
  abstract  = {Sansevieria pfennigii, which to date has been a doubtful species, is confirmed as extant by a recent collection from the Lindi Region in southern Tanzania. The original description of the species, which is based on herbarium material only, is here emended based on additional observations recorded from living plants, including fruits that were previously unknown. Sansevieria pfennigii distinguishes from S. canaliculata, to which it was repeatedly assigned, by its capitate instead of elongate inflorescence, rough rather than smooth leaves, non-pungent instead of pungent leaf tips, dull green leaf colour, more delicate overall appearance, alongside other traits. The difference in inflorescence architecture indicates that these species belong to different groups within Sansevieria and are not closely related; the closest relatives of S. pfennigii are probably S. fischeri and S. stuckyi. Sansevieria pfennigii occurs on well-drained soil in forests, close to S. canaliculata populations. According to the extent of the population seen and the species' overall rarity, it is tentatively assessed as critically endangered.},
  language  = {en}
}
@article{ZaplataNhabangaStalmansetal.2020,
  author    = {Zaplata, Markus Klemens and Nhabanga, Abel and Stalmans, Marc and Volpers, Thomas and Burkart, Michael and Sperfeld, Erik},
  title     = {Grasses cope with high-contrast ecosystem conditions in the large outflow of the Banhine wetlands, Mozambique},
  series = {African journal of ecology},
  volume    = {59},
  journal   = {African journal of ecology},
  number    = {1},
  publisher = {Wiley},
  address   = {Hoboken},
  issn      = {0141-6707},
  doi       = {10.1111/aje.12820},
  pages     = {190 -- 203},
  year      = {2020},
  abstract  = {Ecosystems with highly pulsed water supply must be better understood as climate change may increase frequency and severity of intense storms, droughts and floods. Here we collected data over 3 years (2016-2018) in the episodic wetland outflow channel (Aluize), Banhine National Park, in which the system state changed from dry to wet to dry. Field sampling included vegetation records, small-scale vegetation zoning, the seed bank and water and soil quality. The same main plant species were found in both dry and wet conditions across the riverbed of the outflow channel. We found only very few diaspores of plants in the soil after prolonged drought. In the subsequent flooded state, we examined very dense vegetation on the water surface, which was dominated by the gramineous species Paspalidium obtusifolium. This species formed a compact floating mat that was rooted to the riverbed. The Cyperaceae Bolboschoenus glaucus showed high clonal growth in the form of root tubers, which likely serve as important food reservoir during drought. Soil and water analyses do not indicate a limitation by nutrients. We outline how resident people may change the plant community structure with an increasing practice of setting fire to the meadows in the dried-up riverbed to facilitate plant regrowth as food for their livestock.},
  language  = {en}
}