Darras, Kevin Felix Arno

[["dc.bibliographiccitation.firstpage","29"],["dc.bibliographiccitation.journal","Biological Conservation"],["dc.bibliographiccitation.lastpage","37"],["dc.bibliographiccitation.volume","201"],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Pütz, Peter"],["dc.contributor.author","Fahrurrozi, F."],["dc.contributor.author","Rembold, Katja"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:50:48Z"],["dc.date.available","2017-09-07T11:50:48Z"],["dc.date.issued","2016"],["dc.identifier.doi","10.1016/j.biocon.2016.06.021"],["dc.identifier.gro","3149913"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6624"],["dc.language.iso","en"],["dc.notes.status","zu prüfen; Vorname aus Nachname abgeleitet."],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | B | B06: Taxonomische, funktionelle, phylogenetische und biogeographische Diversität vaskulärer Pflanzen in Regenwald-Transformationssystemen auf Sumatra (Indonesien)"],["dc.relation","SFB 990 | B | B09: Oberirdische Biodiversitätsmuster und Prozesse in Regenwaldtransformations-Landschaften"],["dc.relation.issn","0006-3207"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Measuring sound detection spaces for acoustic animal sampling and monitoring"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","509"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Journal of Wildlife Diseases"],["dc.bibliographiccitation.lastpage","511"],["dc.bibliographiccitation.volume","55"],["dc.contributor.author","Janra, Muhammad N."],["dc.contributor.author","Herwina, Henny"],["dc.contributor.author","Febria, Fuji A."],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Mulyani, Yeni A."],["dc.date.accessioned","2019-07-23T09:12:49Z"],["dc.date.available","2019-07-23T09:12:49Z"],["dc.date.issued","2019"],["dc.description.abstract","We report knemidokoptiasis in a wild male Little Spiderhunter ( Arachnothera longirostra cinereicollis; family Nectariniidae; order Passeriformes) from Jambi, Sumatra, Indonesia, in September 2017. Microscopic examination of a scraping from its leg lesion revealed the presence of Knemidocoptes jamaicensis as the cause of the condition."],["dc.identifier.doi","10.7589/2018-02-054"],["dc.identifier.pmid","30226802"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61904"],["dc.language.iso","en"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | B | B09: Oberirdische Biodiversitätsmuster und Prozesse in Regenwaldtransformations-Landschaften"],["dc.relation.eissn","1943-3700"],["dc.relation.issn","0090-3558"],["dc.subject.gro","sfb990_journalarticles"],["dc.subject.gro","sfb990_abs"],["dc.title","Knemidokoptiasis in a Wild Bird, the Little Spiderhunter ( Arachnothera longirostra cinereicollis), in Sumatra, Indonesia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1945"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Ecology"],["dc.bibliographiccitation.lastpage","1956"],["dc.bibliographiccitation.volume","98"],["dc.contributor.author","Denmead, Lisa H."],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Clough, Yann"],["dc.contributor.author","Diaz, Patrick"],["dc.contributor.author","Grass, Ingo"],["dc.contributor.author","Hoffmann, Munir P."],["dc.contributor.author","Nurdiansyah, Fuad"],["dc.contributor.author","Fardiansah, Rico"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:50:52Z"],["dc.date.available","2017-09-07T11:50:52Z"],["dc.date.issued","2017"],["dc.description.abstract","One of the world's most important and rapidly expanding crops, oil palm, is associated with low levels of biodiversity. Changes in predator communities might alter ecosystem services and subsequently sustainable management but these links have received little attention to date. Here, for the first time, we manipulated ant and flying vertebrate (birds and bats) access to oil palms in six smallholder plantations in Sumatra (Indonesia) and measured effects on arthropod communities, related ecosystem functions (herbivory, predation, decomposition and pollination) and crop yield. Arthropod predators increased in response to reductions in ant and bird access, but the overall effect of experimental manipulations on ecosystem functions was minimal. Similarly, effects on yield were not significant. We conclude that ecosystem functions and productivity in oil palm are, under current levels of low pest pressure and large pollinator populations, robust to large reductions of major predators."],["dc.identifier.doi","10.1002/ecy.1882"],["dc.identifier.gro","3149941"],["dc.identifier.pmid","28464275"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6654"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | B | B09: Oberirdische Biodiversitätsmuster und Prozesse in Regenwaldtransformations-Landschaften"],["dc.relation.issn","0012-9658"],["dc.subject","biodiversity; crop yield; decomposition; ecosystem services; exclosure; exclusion experiment; herbivory; pollination; predation; predators"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","The role of ants, birds and bats for ecosystem functions and yield in oil palm plantations"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1511"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Nature Ecology & Evolution"],["dc.bibliographiccitation.lastpage","1519"],["dc.bibliographiccitation.volume","1"],["dc.contributor.author","Barnes, Andrew D."],["dc.contributor.author","Allen, Kara"],["dc.contributor.author","Kreft, Holger"],["dc.contributor.author","Corre, Marife D."],["dc.contributor.author","Jochum, Malte"],["dc.contributor.author","Veldkamp, Edzo"],["dc.contributor.author","Clough, Yann"],["dc.contributor.author","Daniel, Rolf"],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Denmead, Lisa H."],["dc.contributor.author","Farikhah Haneda, Noor"],["dc.contributor.author","Hertel, Dietrich"],["dc.contributor.author","Knohl, Alexander"],["dc.contributor.author","Kotowska, Martyna M."],["dc.contributor.author","Kurniawan, Syahrul"],["dc.contributor.author","Meijide, Ana"],["dc.contributor.author","Rembold, Katja"],["dc.contributor.author","Edho Prabowo, Walesa"],["dc.contributor.author","Schneider, Dominik"],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Brose, Ulrich"],["dc.date.accessioned","2018-03-13T14:12:09Z"],["dc.date.available","2018-03-13T14:12:09Z"],["dc.date.issued","2017"],["dc.description.abstract","The conversion of tropical rainforest to agricultural systems such as oil palm alters biodiversity across a large range of interacting taxa and trophic levels. Yet, it remains unclear how direct and cascading effects of land-use change simultaneously drive ecological shifts. Combining data from a multi-taxon research initiative in Sumatra, Indonesia, we show that direct and cascading land-use effects alter biomass and species richness of taxa across trophic levels ranging from microorganisms to birds. Tropical land use resulted in increases in biomass and species richness via bottom-up cascading effects, but reductions via direct effects. When considering direct and cascading effects together, land use was found to reduce biomass and species richness, with increasing magnitude at higher trophic levels. Our analyses disentangle the multifaceted effects of land-use change on tropical ecosystems, revealing that biotic interactions on broad taxonomic scales influence the ecological outcome of anthropogenic perturbations to natural ecosystems."],["dc.identifier.doi","10.1038/s41559-017-0275-7"],["dc.identifier.pmid","29185508"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/13011"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | A | A03: Untersuchung von Land-Atmosphäre Austauschprozesse in Landnutzungsänderungs-Systemen"],["dc.relation","SFB 990 | A | A05: Optimierung des Nährstoffmanagements in Ölpalmplantagen und Hochrechnung plot-basierter Treibhausgasflüsse auf die Landschaftsebene transformierter Regenwälder"],["dc.relation","SFB 990 | B | B01: Structure, stability and functioning of macro-invertebrate communities in rainforest transformation systems in Sumatra (Indonesia)"],["dc.relation","SFB 990 | B | B02: Impact of rainforest transformation on phylogenetic and functional diversity of soil prokaryotic communities in Sumatra (Indonesia)"],["dc.relation","SFB 990 | B | B04: Pflanzenproduktivität und Ressourcenaufteilung im Wurzelraum entlang von Gradienten tropischer Landnutzungsintensität und Baumartenvielfalt"],["dc.relation","SFB 990 | B | B06: Taxonomische, funktionelle, phylogenetische und biogeographische Diversität vaskulärer Pflanzen in Regenwald-Transformationssystemen auf Sumatra (Indonesien)"],["dc.relation","SFB 990 | B | B09: Oberirdische Biodiversitätsmuster und Prozesse in Regenwaldtransformations-Landschaften"],["dc.relation.eissn","2397-334X"],["dc.relation.orgunit","Abteilung Bioklimatologie"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Direct and cascading impacts of tropical land-use change on multi-trophic biodiversity"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e01954"],["dc.bibliographiccitation.journal","Ecological Applications : A Publication of the Ecological Society of America"],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Batáry, Péter"],["dc.contributor.author","Furnas, Brett J."],["dc.contributor.author","Grass, Ingo"],["dc.contributor.author","Mulyani, Yeni A."],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2019-07-23T06:52:53Z"],["dc.date.available","2019-07-23T06:52:53Z"],["dc.date.issued","2019"],["dc.description.abstract","Autonomous sound recording techniques have gained considerable traction in the last decade, but the question remains whether they can replace human observation surveys to sample sonant animals. For birds in particular, survey methods have been tested extensively using point counts and sound recording surveys. Here, we review the latest evidence for this taxon within the frame of a systematic map. We compare sampling effectiveness of these two survey methods, the output variables they produce, and their practicality. When assessed against the standard of point counts, autonomous sound recording proves to be a powerful tool that samples at least as many species. This technology can monitor birds in an exhaustive, standardized, and verifiable way. Moreover, sound recorders give access to entire soundscapes from which new data types can be derived (vocal activity, acoustic indices). Variables such as abundance, density, occupancy, or species richness can be obtained to yield data sets that are comparable to and compatible with point counts. Finally, autonomous sound recorders allow investigations at high temporal and spatial resolution and coverage, which are more cost effective and cannot be achieved by human observations alone, even though small-scale studies might be more cost effective when carried out with point counts. Sound recorders can be deployed in many places, they are more scalable and reliable, making them the better choice for bird surveys in an increasingly data-driven time. We provide an overview of currently available recorders and discuss their specifications to guide future study designs."],["dc.identifier.doi","10.1002/eap.1954"],["dc.identifier.pmid","31206926"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61854"],["dc.language.iso","en"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | B | B09: Oberirdische Biodiversitätsmuster und Prozesse in Regenwaldtransformations-Landschaften"],["dc.relation.issn","1051-0761"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Autonomous sound recording outperforms human observation for sampling birds: a systematic map and user guide"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1928"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Methods in Ecology and Evolution"],["dc.bibliographiccitation.lastpage","1938"],["dc.bibliographiccitation.volume","9"],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Furnas, Brett"],["dc.contributor.author","Fitriawan, Irfan"],["dc.contributor.author","Mulyani, Yeni"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2020-12-10T18:26:39Z"],["dc.date.available","2020-12-10T18:26:39Z"],["dc.date.issued","2018"],["dc.description.abstract","1.Autonomous sound recorders are increasingly used to survey birds, and other wildlife taxa. Species richness estimates from sound recordings are usually compared with estimates obtained from established methods like point counts, but so far the comparisons were biased: Detection ranges usually differ between the survey methods, and bird detection distance data are needed for standardizing data from sound recordings. 2.We devised and tested a method for estimating bird detection distances from sound recordings, using a reference recording of test sounds at different frequencies, emitted from known distances. We used our method to estimate bird detection distances in sound recordings from tropical forest sites where point counts were also used. We derived bird abundance and richness measures and compared them between point counts and sound recordings using unlimited radius and fixed radius counts, as well as distance sampling modelling. 3.First we show that it is possible to accurately estimate bird detection distances in sound recordings. We then demonstrate that these data can be used to standardize the detection ranges between point counts and sound recordings with a fixed‐radius approach, leading to higher abundance and richness estimates for sound recordings. Our distance‐sampling approach also revealed that sound recorders sampled significantly higher bird densities than human point counts. 4.We show for the first time that it is possible to standardize detection ranges in sound recordings and that distance sampling can successfully be used too. We revealed that birds were flushed by human observers and that this possibly leads to lower density estimates in point counts, although sound recorders could also have sampled more birds because of their earlier deployment times. Sound recordings are more amenable to distance‐sampling modelling than point counts as they do not exhibit an observer‐induced avoidance effect, and they can easily collect more replicates for obtaining more accurate bird density estimates. Quantifying bird detection distances was so far one important shortcoming that hindered the adoption of modern autonomous sound recording methods for ecological surveys. This article is protected by copyright. All rights reserved."],["dc.identifier.doi","10.1111/2041-210X.13031"],["dc.identifier.eissn","2041-210X"],["dc.identifier.issn","2041-210X"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/76150"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | B | B09: Oberirdische Biodiversitätsmuster und Prozesse in Regenwaldtransformations-Landschaften"],["dc.relation.issn","2041-210X"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Estimating bird detection distances in sound recordings for standardizing detection ranges and distance sampling"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2575"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Journal of Applied Ecology"],["dc.bibliographiccitation.lastpage","2586"],["dc.bibliographiccitation.volume","55"],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Batáry, Péter"],["dc.contributor.author","Furnas, Brett"],["dc.contributor.author","Celis‐Murillo, Antonio"],["dc.contributor.author","Van Wilgenburg, Steven L."],["dc.contributor.author","Mulyani, Yeni A."],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2019-07-23T08:10:02Z"],["dc.date.available","2019-07-23T08:10:02Z"],["dc.date.issued","2018"],["dc.description.abstract","Autonomous sound recording is a promising sampling method for birds and other vocalizing terrestrial wildlife. However, while there are clear advantages of passive acoustic monitoring methods over classical point counts conducted by humans, it has been difficult to quantitatively assess how they compare in their sampling performance. Quantitative comparisons of species richness between acoustic recorders and human point counts in bird surveys have previously been hampered by the differing and often unknown detection ranges or sound detection spaces among sampling methods. We performed two meta-analyses based on 28 studies where bird point counts were paired with sound recordings at the same sampling sites. We compared alpha and gamma richness estimated by both survey methods after equalizing their effective detection ranges. We further assessed the influence of technical sound recording specifications (microphone signal-to-noise ratio, height and number) on the bird sampling performance of sound recorders compared to unlimited radius point counts. We show that after standardizing detection ranges, alpha and gamma richness from both methods are statistically indistinguishable, while there might be an avoidance effect in point counts. Furthermore, we show that microphone signal-to-noise ratio (a measure of its quality), height and number positively affect performance through increasing the detection range, allowing sound recorders to match the performance of human point counts. Synthesis and applications. We demonstrate that when used properly, high-end sound recording systems can sample terrestrial wildlife just as well as human observers conducting point counts. Correspondingly, we suggest a first standard methodology for sampling birds with autonomous sound recorders to obtain results comparable to point counts and enable practical sampling. We also give recommendations for carrying out effective surveys and making the most out of autonomous sound recorders."],["dc.identifier.doi","10.1111/1365-2664.13229"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61880"],["dc.language.iso","en"],["dc.relation","SFB 990: Ökologische und sozioökonomische Funktionen tropischer Tieflandregenwald-Transformationssysteme (Sumatra, Indonesien)"],["dc.relation","SFB 990 | B | B09: Oberirdische Biodiversitätsmuster und Prozesse in Regenwaldtransformations-Landschaften"],["dc.relation.issn","0021-8901"],["dc.relation.issn","1365-2664"],["dc.subject.gro","sfb990_journalarticles"],["dc.title","Comparing the sampling performance of sound recorders versus point counts in bird surveys: A meta‐analysis"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]