Rahn, Charlotte

[["dc.bibliographiccitation.firstpage","493"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Ethology"],["dc.bibliographiccitation.lastpage","503"],["dc.bibliographiccitation.volume","115"],["dc.contributor.author","Ey, Elodie"],["dc.contributor.author","Rahn, Charlotte"],["dc.contributor.author","Hammerschmidt, Kurt"],["dc.contributor.author","Fischer, Julia"],["dc.date.accessioned","2017-09-07T11:47:13Z"],["dc.date.available","2017-09-07T11:47:13Z"],["dc.date.issued","2009"],["dc.description.abstract","Sound propagates differently and visibility varies according to the habitat type. Animals should therefore adapt the acoustic structure and the usage of their vocal signals to the environment. In the present study, we examined the influence of the habitat on the vocal behaviour of wild olive baboons (Papio hamadryas anubis) in two populations: one living in Gashaka-Gumti National Park, Nigeria, and the other in Budongo Forest, Uganda. We investigated whether female baboons modified the acoustic structure of their grunts and their rate of grunting when they wandered between closed and open habitat types. As an adaptation to the environmental conditions, baboons might utter calls with a longer duration, a lower fundamental frequency and/or energy concentrated in lower frequencies in a closed habitat like forest than in an open habitat. Baboons should also grunt more frequently in the closed habitat. Analyses showed that in both populations grunts uttered in forest were significantly longer than in open habitat. Additionally, baboons from Uganda showed a significantly higher grunt rate in forest than in open habitat. These results revealed a certain degree of plasticity in vocal production and call usage with regard to the habitat type. However, results in Nigeria suggested that, besides habitat structure, other proximate factors like the context of calling and the proximity between group members could also have an influence on the actual communication patterns."],["dc.identifier.doi","10.1111/j.1439-0310.2009.01638.x"],["dc.identifier.gro","3150653"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/7433"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0179-1613"],["dc.title","Wild Female Olive Baboons Adapt their Grunt Vocalizations to Environmental Conditions"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2721"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Global Change Biology"],["dc.bibliographiccitation.lastpage","2736"],["dc.bibliographiccitation.volume","16"],["dc.contributor.author","Pendall, Elise"],["dc.contributor.author","Schwendenmann, Luitgard"],["dc.contributor.author","Rahn, T."],["dc.contributor.author","Miller, J. B."],["dc.contributor.author","Tans, P. P."],["dc.contributor.author","White, J. W. C."],["dc.date.accessioned","2018-11-07T08:38:28Z"],["dc.date.available","2018-11-07T08:38:28Z"],["dc.date.issued","2010"],["dc.description.abstract","Conversion of tropical rainforests to pastures and plantations is associated with changes in soil properties and biogeochemical cycling, with implications for carbon cycling and trace gas fluxes. The stable isotopic composition of ecosystem respiration (delta 13C(R) and delta 18O(R)) is used in inversion models to quantify regional patterns of CO2 sources and sinks, but models are limited by sparse measurements in tropical regions. We measured soil respiration rates, concentrations of CO2, CH4, CO, N2O and H-2 and the isotopic composition of CO2, CH4 and H-2 at four heights in the nocturnal boundary layer (NBL) above three common land-use types in central Panama, during dry and rainy seasons. Soil respiration rates were lowest in Plantation (average 3.4 mu mol m-2 s-1), highest in Pasture (8.3 mu mol m-2 s-1) and intermediate in Rainforest (5.2 mu mol m-2 s-1). delta 13C(R) closely reflected land use and increased during the dry season where C-3 vegetation was present. delta 18O(R) did not differ by land use but was lower during the rainy than the dry season. CO2 was correlated with other species in approximately half of the NBL profiles, allowing us to estimate trace gas fluxes that were generally within the range of literature values. The Rainforest soil was a sink for CH4 but emissions were observed in Pasture and Plantation, especially during the wet season. N2O emissions were higher in Pasture and Plantation than Rainforest, contrary to expectations. Soil H-2 uptake was highest in Rainforest and was not observable in Pasture and Plantation during the wet season. We observed soil CO uptake during the dry season and emissions during the wet season across land-use types. This study demonstrated that strong impacts of land-use change on soil-atmosphere trace gas exchange can be detected in the NBL, and provides useful observational constraints for top-down and bottom-up biogeochemistry models."],["dc.identifier.doi","10.1111/j.1365-2486.2010.02199.x"],["dc.identifier.isi","000281676700008"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/18779"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.relation.issn","1354-1013"],["dc.title","Land use and season affect fluxes of CO2, CH4, CO, N2O, H-2 and isotopic source signatures in Panama: evidence from nocturnal boundary layer profiles"],["dc.type","review"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]