Wielgoss, Arno Christian

[["dc.bibliographiccitation.firstpage","253"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Agriculture, Ecosystems & Environment"],["dc.bibliographiccitation.lastpage","259"],["dc.bibliographiccitation.volume","135"],["dc.contributor.author","Wielgoss, Arno"],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Buchori, Damayanti"],["dc.contributor.author","Fiala, Brigitte"],["dc.contributor.author","Clough, Yann"],["dc.date.accessioned","2017-09-07T11:54:40Z"],["dc.date.available","2017-09-07T11:54:40Z"],["dc.date.issued","2009"],["dc.description.abstract","Agricultural land conversion and climate change play a major role in shaping tropical landscapes, but thedirect and indirect links to biodiversity and species community composition remain little understood.We tested how landscape and environmental factors and management techniques, affect the diversity ofground and tree living ants in cacao plantations in Sulawesi (Indonesia). In addition, we investigated theoccurrence of an aggressive, numerically dominant dolichoderine ant species (genusPhilidris). Half of the43 study plots, which differed in canopy cover, shade tree diversity, cacao tree age and their distance tothe nearest rainforest, were weeded manually every 3 month, the others biannually. Each plot wasdivided into two subplots, one was fertilized twice a year whereas the other remained unfertilized. Usingprotein and sugar-solution baits, we examined species richness, abundances and interspecificinteractions of ants on the ground and in cacao trees. In total we collected 160 ant morphospecies.Reduced ant species richness on the ground and in the trees was significantly correlated with highermean temperatures while the other factors, including number of shade trees did not have any significantinfluence. The abundant and aggressivePhilidrisspecies, reduced arboreal ant species richness. Itoccurred more frequently in warmer, less shaded plots and on older cacao trees, which offer morenesting sites. In our study we show, that micro-climatic conditions and the occurrence of singleecologically dominant species are the major factors predicting species diversity in tropical agriculturalecosystems."],["dc.identifier.doi","10.1016/j.agee.2009.10.003"],["dc.identifier.gro","3150076"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6804"],["dc.language.iso","en"],["dc.notes.status","public"],["dc.relation.issn","0167-8809"],["dc.subject","Biodiversity conservation; Formicidae; Intensification; Philidris; Theobroma cacao; Sulawesi"],["dc.title","Temperature and a dominant dolichoderine ant species affect ant diversity in Indonesian cacao plantations"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","690"],["dc.bibliographiccitation.issue","1706"],["dc.bibliographiccitation.journal","Proceedings of the Royal Society B: Biological Sciences"],["dc.bibliographiccitation.lastpage","694"],["dc.bibliographiccitation.volume","278"],["dc.contributor.author","Wanger, Thomas C."],["dc.contributor.author","Wielgoss, Arno C."],["dc.contributor.author","Motzke, Iris"],["dc.contributor.author","Clough, Yann"],["dc.contributor.author","Brook, Barry W."],["dc.contributor.author","Sodhi, Navjot S."],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:50:12Z"],["dc.date.available","2017-09-07T11:50:12Z"],["dc.date.issued","2010"],["dc.description.abstract","Interactions between native diversity and invasive species can be more complex than is currently understood. Invasive ant species often substantially reduce diversity in the native ants diversity that act as natural control agents for pest insects. In Indonesia (on the island of Sulawesi), the third largest cacao producer worldwide, we show that a predatory endemic toad (Ingerophrynus celebensis) controls invasive ant (Anoplolepis gracilipes) abundance, and positively affects native ant diversity. We call this the invasive-naivety effect (an opposite of enemy release), whereby alien species may not harbour anti-predatory defences against a novel native predator. A positive effect of the toads on native ants may facilitate their predation on insect vectors of cacao diseases. Hence, toads may increase crop yield, but further research is needed on this aspect. Ironically, amphibians are globally the most threatened vertebrate class and are strongly impacted by the conversion of rainforest to cacao plantations in Sulawesi. It is, therefore, crucial to manage cacao plantations to maintain these endemic toads, as they may provide critical ecosystem services, such as invasion resistance and preservation of native insect diversity."],["dc.identifier.doi","10.1098/rspb.2010.1512"],["dc.identifier.gro","3149846"],["dc.identifier.pmid","20826488"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6549"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","0962-8452"],["dc.title","Endemic predators, invasive prey and native diversity"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","1775"],["dc.bibliographiccitation.journal","Proceedings of the Royal Society B: Biological Sciences"],["dc.bibliographiccitation.volume","281"],["dc.contributor.author","Wielgoss, Arno"],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.author","Rumede, Alfianus"],["dc.contributor.author","Fiala, Brigitte"],["dc.contributor.author","Seidel, Hannes"],["dc.contributor.author","Shahabuddin, Saleh"],["dc.contributor.author","Clough, Yann"],["dc.date.accessioned","2017-09-07T11:53:55Z"],["dc.date.available","2017-09-07T11:53:55Z"],["dc.date.issued","2013"],["dc.description.abstract","Owing to complex direct and indirect effects, impacts of higher trophic levels on plants is poorly understood. In tropical agroecosystems, ants interact with crop mutualists and antagonists, but little is known about how this integrates into the final ecosystem service, crop yield. We combined ant exclusion and introduction of invasive and native-dominant species in cacao agroecosystems to test whether (i) ant exclusion reduces yield, (ii) dominant species maximize certain intermediate ecosystem services (e.g. control of specific pests) rather than yield, which depends on several, cascading intermediate services and (iii) even, species-rich ant communities result in highest yields. Ants provided services, including reduced leaf herbivory and fruit pest damage and indirect pollination facilitation, but also disservices, such as increased mealybug density, phytopathogen dissemination and indirect pest damage enhancement. Yields were highest with unmanipulated, species-rich, even communities, whereas ant exclusion decreased yield by 27%. Introduction of an invasive-dominant ant decreased species density and evenness and resulted in 34% lower yields, whereas introduction of a non-invasive-dominant species resulted in similar species density and yields as in the unmanipulated control. Species traits and ant community structure affect services and disservices for agriculture in surprisingly complex ways, with species-rich and even communities promoting highest yield."],["dc.identifier.doi","10.1098/rspb.2013.2144"],["dc.identifier.gro","3150012"],["dc.identifier.pmid","24307667"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6733"],["dc.language.iso","en"],["dc.notes.status","public"],["dc.relation.issn","0962-8452"],["dc.subject","Indonesia; Sulawesi; Theobroma cacao; ant exclusion; indirect interactions; yield"],["dc.title","Interaction complexity matters: disentangling services and disservices of ant communities driving yield in tropical agroecosystems"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","8311"],["dc.bibliographiccitation.issue","20"],["dc.bibliographiccitation.journal","Proceedings of the National Academy of Sciences"],["dc.bibliographiccitation.lastpage","8316"],["dc.bibliographiccitation.volume","108"],["dc.contributor.author","Clough, Yann"],["dc.contributor.author","Barkmann, Jan"],["dc.contributor.author","Juhrbandt, Jana"],["dc.contributor.author","Kessler, Michael"],["dc.contributor.author","Wanger, Thomas Cherico"],["dc.contributor.author","Anshary, Alam"],["dc.contributor.author","Buchori, Damayanti"],["dc.contributor.author","Cicuzza, Daniele"],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Putra, Dadang Dwi"],["dc.contributor.author","Erasmi, Stefan"],["dc.contributor.author","Pitopang, Ramadhanil"],["dc.contributor.author","Schmidt, Carsten"],["dc.contributor.author","Schulze, Christian H."],["dc.contributor.author","Seidel, Dominik"],["dc.contributor.author","Steffan-Dewenter, Ingolf"],["dc.contributor.author","Stenchly, Kathrin"],["dc.contributor.author","Vidal, Stefan"],["dc.contributor.author","Weist, Maria"],["dc.contributor.author","Wielgoss, Arno Christian"],["dc.contributor.author","Tscharntke, Teja"],["dc.date.accessioned","2017-09-07T11:54:44Z"],["dc.date.accessioned","2020-05-11T13:18:51Z"],["dc.date.available","2017-09-07T11:54:44Z"],["dc.date.available","2020-05-11T13:18:51Z"],["dc.date.issued","2011"],["dc.description.abstract","Local and landscape-scale agricultural intensification is a major driver of global biodiversity loss. Controversially discussed solutions include wildlife-friendly farming or combining high-intensity farming with land-sparing for nature. Here, we integrate biodiversity and crop productivity data for smallholder cacao in Indonesia to exemplify for tropical agroforests that there is little relationship between yield and biodiversity under current management, opening substantial opportunities for wildlife-friendly management. Species richness of trees, fungi, invertebrates, and vertebrates did not decrease with yield. Moderate shade, adequate labor, and input level can be combined with a complex habitat structure to provide high biodiversity as well as high yields. Although livelihood impacts are held up as a major obstacle for wildlife-friendly farming in the tropics, our results suggest that in some situations, agroforests can be designed to optimize both biodiversity and crop production benefits without adding pressure to convert natural habitat to farmland."],["dc.identifier.doi","10.1073/pnas.1016799108"],["dc.identifier.gro","3150093"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8611"],["dc.identifier.scopus","2-s2.0-79957762227"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6823"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/65024"],["dc.identifier.url","http://www.scopus.com/inward/record.url?eid=2-s2.0-79957762227&partnerID=MN8TOARS"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.eissn","1091-6490"],["dc.relation.issn","0027-8424"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Combining high biodiversity with high yields in tropical agroforests"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","15"],["dc.bibliographiccitation.lastpage","71"],["dc.contributor.author","Clough, Yann"],["dc.contributor.author","Abrahamczyk, Stefan"],["dc.contributor.author","Adams, Marc-Oliver"],["dc.contributor.author","Anshary, Alam"],["dc.contributor.author","Ariyanti, Nunik"],["dc.contributor.author","Betz, Lydia"],["dc.contributor.author","Buchori, Damayanti"],["dc.contributor.author","Cicuzza, Daniele"],["dc.contributor.author","Darras, Kevin"],["dc.contributor.author","Putra, Dadang Dwi"],["dc.contributor.author","Fiala, Brigitte"],["dc.contributor.author","Gradstein, S. Robbert"],["dc.contributor.author","Kessler, Michael"],["dc.contributor.author","Klein, Alexandra-Maria"],["dc.contributor.author","Pitopang, Ramadhanil"],["dc.contributor.author","Sahari, Bandung"],["dc.contributor.author","Scherber, Christoph"],["dc.contributor.author","Schulze, Christian H."],["dc.contributor.author","Sporn, Simone G."],["dc.contributor.author","Stenchly, Kathrin"],["dc.contributor.author","Tjitrosoedirdjo, Sri Sudarmiyati"],["dc.contributor.author","Wanger, Thomas Cherico"],["dc.contributor.author","Weist, Maria"],["dc.contributor.author","Wielgoss, Arno"],["dc.contributor.author","Tscharntke, Teja"],["dc.contributor.editor","Tscharntke, Teja"],["dc.contributor.editor","Leuschner, Christoph"],["dc.contributor.editor","Veldkamp, Edzo"],["dc.contributor.editor","Faust, Heiko"],["dc.contributor.editor","Guhardja, Edi"],["dc.contributor.editor","Bidin, Arifuddin"],["dc.date.accessioned","2017-09-07T11:54:47Z"],["dc.date.available","2017-09-07T11:54:47Z"],["dc.date.issued","2010"],["dc.description.abstract","The need to capture primary production in order to sustain and improve economic livelihoods has lead to increasing conversion of natural habitat and intensification of agricultural practices in many parts of the world including most tropical regions. Understanding how these processes affect ecosystems and their functioning, in particular in the high-diversity ecosystems of the tropics, has become a key issue in ecological research. In this chapter, our focus is on the agriculture-forest landscapes of Central Sulawesi, Indonesia, an island widely known for its endemic yet still poorly known flora and fauna. The rise of the region to one of the largest cacao producing areas in the world is at the core of recent land-use change and intensification processes. Covering plants (trees, rattan palms, herbs, bryophytes) and several invertebrate (ants, dung beetles, cacao insect herbivores, fruit-feeding butterflies, parasitic Hymenoptera, spiders) and vertebrate groups (amphibians, birds, murids, reptiles), we give an in-depth overview of the determinants of biodiversity in cacao landscapes, including both management and landscape-scale variables into our analyses. Results show that shaded agroforests host a rich community of species. By adopting a large-scale study design we showed that proximity of natural forest is a key predictor for species richness of plants, invertebrates and vertebrates alike. Endemics and forest specialists benefit most from indigenous shade tree cover and proximity to natural forest. Importantly, several functionally important groups such as insectivorous and seed-dispersing birds benefit from tall shade trees, shade tree diversity and proximity to forest edge, while parasitoid diversity is greatest close to natural forests. Available data on the effects of landuse change in cacao landscape of Central Sulawesi is increasing. Change in landscape configuration and management practices are being clearly reflected in the composition of species communities, with likely impacts on ecosystem services such as pest control and pollination. More knowledge is needed especially in terms of species interactions and ecosystem functioning, but also on how existing knowledge can contribute to effective conservation in human-dominated landscapes outside protected areas."],["dc.identifier.doi","10.1007/978-3-642-00493-3_2"],["dc.identifier.gro","3150103"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6834"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.publisher","Springer"],["dc.publisher.place","Berlin, Heidelberg"],["dc.relation.isbn","978-3-642-00492-6"],["dc.relation.ispartof","Tropical Rainforests and Agroforests under Global Change: Ecological and Socio-economic Valuations"],["dc.relation.issn","1863-5520"],["dc.title","Biodiversity patterns and trophic interactions in human-dominated tropical landscapes in Sulawesi (Indonesia): plants, arthropods and vertebrates"],["dc.type","book_chapter"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]