PD Dr. agr. Frank Riesbeck

Frank Riesbeck erforscht die Auswirkungen von Bewässerung, Abwassernutzung und Bodenkontamination auf Landwirtschaft, Wasserwirtschaft und Ökosysteme. Sein aktueller Fokus liegt auf Salinität und Wassermanagement in Bewässerungsregionen (insbesondere Iran) sowie auf den Chancen und Risiken der Abwassernutzung in der Landwirtschaft. Daneben untersucht er Bodenbelastungen durch Industrieabfälle und deren ökologische Folgen. Seine Arbeiten kombinieren hydrologische Modellierung mit Feldstudien und richten sich an Wasserwirtschaftsbehörden, Landwirtschaftsbetriebe und Umweltmanagement — relevant für Regionen mit Wasserknappheit und Bodendegradation.

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  Zeitraum: 08/2005 - 08/2006 Projektleitung: PD Dr. agr. Frank Riesbeck

• Vegetation of the Ash Dump of the "Kosova A" Power Plant and the Slag Dump of the "Ferronikeli" Smelter in Kosovo

  2012

  This study presents the results of a study on the flora and vegetation associated with the ash dumpof the Kosova A power plant and with a slag dump of a Ferronikeli smelter. With time, vegetation redeveloped on these dumps as a result of natural succession. In the ash dump of the Kosova A power plant, a total of 125 species were recorded (belonging to 29 families and 93 genera), whereas 72 species (belonging to 24 families and 58 genera) were recorded in the slag dump of the Ferronikeli smelter. Twenty-eight species were recorded in both locations. In the old parts of the ash dump of the Kosova A power plant, plants had established communities where three plant associations were recorded ( Echio-Melilotetum Tx. 1942, Bromo-Sambucetum ebuli Br.-Bl. and Sisymbrio-Diplotaxidietum tenuifolia). The process of vegetation development at the ash disposal site indicates that natural colonisation had established the plant communities, which will provide protection against erosion and dust dispersion by wind.

• São Tomé Island Endemic Treefrogs ( <i>Hyperolius</i> spp.) and Land-Use Intensification: A Tale of Hope and Caution

  2018

  Tropical Conservation Science · DOI

  Forest degradation is a major driver of the global biodiversity declines. However, responses to forest degradation vary greatly between taxa and are predominantly understudied. This study investigates the effects of land-use change on the endemic amphibian fauna of São Tomé Island (Central Africa), where a fast-growing human population increases pressure on forest resources. We sampled acoustic data on reed frog ( Hyperolius spp.) abundance at eight transects in each of four land-use categories, representing different levels of forest degradation: old-growth forest, secondary forest, agroforest, and horticulture. While Hyperolius molleri was most abundant in secondary forest and horticulture, Hyperolius thomensis was almost exclusively found in agroforest. We interpret these differences based on reproductive traits, since both species deposit terrestrial eggs and have aquatic larvae, but reproduce in different microhabitats. H. molleri utilizes open water bodies bordered by vegetation for calling and oviposition, which human disturbance has made available in secondary forest and horticulture. In contrast, H. thomensis breeds in water-filled tree holes (phytotelmata), which predominantly occurred in agroforest, often within coral trees ( Erythrina spp.). This first study on Santomean amphibian abundances revealed that H. molleri and H. thomensis males exhibit distinct nonlinear responses to forest degradation and may reap some benefit from human habitat alteration. However, despite their apparent tolerance to some anthropogenic disturbance, further land-use intensification may reduce overall habitat suitability for these and other endemic species.